PROCEEDINGS VOLUME II

Size: px
Start display at page:

Download "PROCEEDINGS VOLUME II"

Transcription

1 11TH WORLD LAKES CONFERENCE NAIROBI, KENYA, 31 OCTOBER TO 4TH NOVEMBER 2005 PROCEEDINGS VOLUME II EDITED BY: Eric O. Odada, Daniel O. Olago, Washington Ochola, Micheni Ntiba, Shem Wandiga, Nathan Gichuki and Helida Oyieke

2 Feeding habits of introduced Largemouth Bass around Lake Biwa and in ponds without Mesopredators in Japan Masahiro Nakagawa Department of Fisheries, Faculty of Agriculture, Kinki University., Nakamachi , Nara , Japan gf998002@yahoo.co.jp Abstract To understand the feeding habits of largemouth bass Micropterus salmoides in Japanese inland waters, the stomach contents of fish from three rivers, one satellite lake around Lake Biwa, and two closed water systems without mesopredators that differed in catchment landscape, were examined. Specimens from lotic areas were collected from Iso River in spring 2001; from Etsura River, spring 2002 and 2003; and from Kawamichi River, summer Specimens from lentic areas were collected from Katada-naiko Lake from October 2001 to May 2005; Pond A, summer 2001; and Pond B, summer To estimate the frequency of occurrence of prey, the stomach contents were categorized into fishes, shrimps, aquatic and terrestrial insects, daphnia and midges, and others. The main prey in Iso River was fishes, including Gymnogobius isaza, which is an endemic goby of Lake Biwa and is categorized as near threatened in the Japanese Red Data Book. The main prey in Etsura River remarkably changed from fishes (86.0%) in 2002 to shrimps (87.1%) in The main prey of fry in Kawamichi River was fishes and shrimps. The main prey in the lentic areas were fishes in Katada-naiko Lake, aquatic and terrestrial insects in Pond A, and daphnia and midges in Pond B. These findings indicate that depending on their established habitats, largemouth bass mainly prey on fishes and shrimps around Lake Biwa; they dramatically change their main feeding habits within a short time in the same habitat, and they normally prey on fishes and/or shrimps irrespective of the habitat area, i.e., rivers or lakes. These findings also demonstrated that the largemouth bass residing in closed water systems without mesopredators frequently prey on aquatic and terrestrial insects or daphnia and midges, and the top-down effects on account of direct predation will lead to confusion in the trophic cascade. Key words: endangered species, Gymnogobius isaza, invasive alien species Introduction Largemouth bass Micropterus salmoides is a typical invasive alien fish species that belongs to the family Centrarchidae of the order Perciformes. The largemouth bass, which is naturally distributed in the northern part of America, was primarily introduced into Lake Ashinoko in central Japan in 1925 and was then artificially dispersed in Japanese inland waters. The species is now widely distributed over 74% of the waters out of the examined 227 water bodies, including 94 dam lakes (Environmental Agency, 2004), because it possesses the ability to adapt and thereby establish itself in various environmental conditions due to its predominant feeding, growth, and reproductive habits (Yodo, 2002). 242 Largemouth bass has already established in Lake Biwa, which is the largest lake in Japan (surface area, km 2 ; maximum depth, 104 m), a hotspot of biodiversity (more than 50 fish species) with some endemic species. The fish was first collected in 1974 from the northern part of the lake, and since the early 1980s, mass propagation was recorded throughout the coast of the lake (Maehata, 1993). It is common knowledge that the yields from fisheries specific for other fish species as well as the biodiversity in the lake has shown a decline with the increase in the population of largemouth bass in the lake. On one hand, the species must have occupied many ponds out of more than 200,000 ponds in Japan, although very little information on this subject is currently available in the published literature. Some ponds have recently been considered to be important because they have functioned as refuges for endangered fishes in terms of in situ conservation (e.g., Kawamura & Hosoya, 1997). In some ponds with limited capacity, mesopredators are often exhausted by the indiscriminate introduction of fish. Therefore, the feeding habits of the largemouth bass might be unusual. In order to accumulate case studies and obtain new findings regarding the feeding habits of the largemouth bass and for the assessment of its negative effects on the ecosystem, this study of the stomach contents of the species focused on prey selectivity, attack on propagation of an endemic goby, and the top-down effect on low trophic levels in closed water systems. In this study, the author has reported several novel findings and suggestive data pertaining to the above-mentioned aspects. Material and methods Sampling sites This study was performed in Lake Biwa water system in Kinki region, Japan. The sampling sites around Lake Biwa in Shiga Prefecture were as follows: the Iso River (E136 15'50'', N35 18'15''; width of the river, 5 m) in Sakata county, the Etsura River (E136 12'55'', N35 15'15''; width, 20 m) in Hikone city, the Kawamichi River (E136 14'30'', N35 23'30''; width, 6 m) in Higashi-azai county, and a part of the Katada-naiko lake (E135 55'30'', N35 07'10''; surface area, 2340 m 2 ) in Otsu city. The population size of the largemouth bass in the Katada-naiko Lake had been constant at low levels

3 until 2003, but has increased recently (Nakagawa, unpublished data). The sampling sites of the ponds were as follows: Pond A (E135 44'45'', N34 46'45''; 150 m 2 ) in Tanabe county of Kyoto Prefecture and Pond B (E135 53'40'', N34 52'40''; 200 m 2 ) in Otsu city of Shiga Prefecture. In both the ponds, no fishes, except the largemouth bass and a few big carps (only Pond A), and no shrimps, except, crayfish were observed. Sampling methods All the specimens from the 3 rivers and the Katadanaiko Lake were collected using a casting net. Specimens from Pond A and Pond B were collected by fishing, except for 3 specimens that were colleted using a hand net and 7 specimens that were collected using a casting net, respectively. In order to prevent largemouth bass from swallowing fishing baits, which could result in mistaken assumption of the bait as part of the stomach contents, sausage and angleworm were used as baits. The specimens were collected during the daytime, with the exception of some specimens from the Etsura River in 2003 and the Katada-naiko Lake. Following their capture, the specimens were immediately fixed with 10% formalin solution to prevent expulsion and digestion of the stomach contents. Specimens In 2001, 166 fish specimens were obtained from the Iso River (Standard body length ± SD, ± 22.6 mm; Min Max, mm); 130 fish on April 14, 15 fish on May 13, and 21 fish on June 21. In 2002, 296 fish specimens from the Etsura River were caught (142.1 ± 32.3 mm, mm; N = 260, except 36 specimens that were not measured); 27 fish on May 26, 67 fish on May 29, 63 fish on June 2, 19 fish on June 9, 7 fish on July 21, 27 fish on September 22, 64 fish on September 26, and 22 fish on September 29. In 2003, 105 fish specimens were obtained from the Etsura River (146.0 ± 36.2 mm, mm); 16 fish, 61 fish, and 28 fish on June 15, June 19, and June 20, respectively. In 2001, 99 fish specimens were obtained from the Kawamichi River (86.6 ± 14.9 mm, mm; N = 76, except 23 specimens that were not measured); 14 fish and 43 fish on August 22 and August 16, respectively, 29 fish on September 16, and 13 fish on October 13. From September 2001 to May 2005, 30 fish specimens were obtained from the Katada Lake (135.4 ± 69.9 mm, mm). A total of 13 fish specimens were obtained from Pond A (116.6 ± 15.6 mm, mm); 10 fish and 3 fish on July 31 and August 3, 2002, respectively, and 26 fish specimens were obtained from Pond B (12.7 ± 4.1 mm, mm); 4, 2, 10, and 2 fish on 8, 10, 11, and 31 of August, respectively and 8 fish on September 4, Analysis of stomach contents To understand prey selectivity in largemouth bass, the stomach contents were examined using the specimens from the above-mentioned sampling sites. Frequencies of the occurrence of the prey were examined after measuring the standard body length. The preys in the stomach were categorized as follows: fishes, shrimps, insects (not including midges), daphnia and midges (DM), and/or others. Fishes were categorized into the following categories: osmerid genus, cyprinid genus, and gobiid genus. Shrimps were categorized into the following categories: river shrimp and/or freshwater prawn (river shrimps) and crayfish. Egg count in Biwa goby To clarify the negative effect of the feeding on Biwa goby (indigenous goby fish population of Lake Biwa), 7 specimens that preyed on Biwa goby without digestion from the Iso River were used in this study. Biwa goby was identified by inspecting the maxillary length, interorbital width, and caudal peduncle, and they were measured in terms of their body weight. Each ovary of the preyed goby was picked from the stomach of the largemouth bass and then counted the eggs in the ovary one by one. DM count In order to analyze the effect of the feeding on small organisms, the stomach contents of all the 24 specimens that preyed on the DM from Pond B were investigated in detail. The weight of the stomach contents was measured after removing the moisture by using an absorbent paper towel. In order to determine the correlation coefficient between the weight and the number of DM, the prey from one randomly selected specimen of the 24 specimens were counted one by one on graph paper. The numbers of DM in the remainder of the specimens were determined using the correlation coefficient. Daphnia and midges were equated in terms of weight due to the ease of calculations. In the case that the stomach contents included any insects, the weight measurements were repeated to ascertain the DM weight. Results Frequency of prey occurrence at each sampling site Figure 1 shows the frequencies of all specimens, except those with an empty stomach, at each sampling site: Iso River, Etsura River in 2002 and in 2003, Kawamichi River, Katada-naiko Lake, Pond A, and Pond B. The frequencies and prey categories differed among the sampling sites and sampling years. The diet composition also differed significantly. 243

4 Iso R. (2001) N = 124 Etusra R. (2002) N = 243 Etsura R. (2003) N = 101 Kawamichi R. (2001) N = 79 Katada L. (2001Ğ2005) N = 14 Pond A (2001) N = 9 Pond B (2002) N = 24 0% 20% 40% 60% 80% 100% F%; Frequency of prey occurrence Fishes Fishes and Shrimps Shrimps Fishes and Insects Shrimps and Insects Insects Daphnias and Midges Insects, Daphnias, and Midges Others Figure 1. Frequency of prey occurrence of largemouth bass Micropterus salmoides in Iso River, Etsura River, Kawamichi River, Katada-naiko lake, and two ponds without mesopredators. In this study, the main prey components of the largemouth bass were fishes and shrimps, except in the ponds. In the Iso River, stomach contents were obtained from 124 specimens (74.7%). Fishes, shrimps, and insects were obtained from 75 specimens (60.5%), 88 specimens (71.0%), and 7 specimens (5.6%), respectively. In the fishes category, the osmerid genus (Ayu Plecoglossus altivelis altivelis and Japanese smelt Hypomesus nipponensis), cyprinid genus (stone moroko Pseudorasbora parva), and gobiid genus (common freshwater goby Rhinogobius sp. and Biwa goby Gymnogobius isaza) were obtained in 3, 3, and 38 specimens, respectively. In the shrimp category, river shrimps and crayfish were obtained from 89 and 6 specimens, respectively. In the Etsura River, stomach contents were obtained from 243 specimens (82.1%) in 2002 and 101 specimens (96.2%) in The stomach contents showed a significant change between the two years. Fishes were obtained from 209 specimens (86.0%) in 2002 and from 28 specimens (27.7%) in Shrimps were obtained from 68 specimens (28.0%) in 2002 and from 88 specimens (87.1%) in Insects were obtained from 3 specimens (1.2%) only in In the fish category, in 2002, fish of the osmerid genus (Ayu) and gobiid genus (common freshwater goby) were obtained from 53 and 23 specimens, respectively. On the other hand, in 2003, fish of the osmerid genus (Ayu) and gobiid genus (common freshwater goby) were obtained from and 4 specimens, respectively. In the shrimp category, in 2002, river shrimps were obtained from 52 specimens, whereas crayfish were obtained from only 1 specimen. On the other hand, in 2003, river shrimps were obtained from 87 specimens, whereas crayfish were obtained from 3 specimens. In the Kawamichi River, stomach contents were obtained from 79 specimens (79.8%). Fishes and shrimps were obtained from 67 (84.8%) and 20 specimens (25.3%), respectively. In the fish category, fish of the osmerid genus (Ayu), cyprinid fish (field gudgeon Gnathopogon elongatus elongatus and dark chub Zacco temminckii), and gobiid genus (common freshwater goby) were obtained from 1, 2, and 26 specimens, respectively. In the shrimp category, river shrimps were obtained from 22 specimens. Although all the specimens were not adults, none of the specimens preyed on insects or DM. In the Katada-naiko Lake, stomach contents were obtained from 14 specimens (46.7%). Fishes and shrimps were obtained from 13 specimens (92.9%) and 1 specimen (7.1%), respectively. In the fish category, gobiid genus (common freshwater goby) was obtained from 2 specimens, whereas in the shrimp category, 3 crayfish were obtained from 1 specimen. None of the specimens preyed on insects or DM. In Pond A, stomach contents were obtained from 9 specimens (69.2%). Shrimps and insects were

5 obtained from 2 specimens (22.2%) and 9 specimens (100%), respectively. The shrimps were identified as crayfish. Furthermore, 1 frog was obtained from 1 specimen (11.1%). In Pond B, stomach contents were obtained from 24 specimens (92.3%). Crayfish, insects, and DM were obtained from 1 specimen (4.2%), 7 specimens (29.2%), and 22 specimens (91.7%), respectively. None of the specimens preyed on the fry of largemouth bass in both ponds. Number of eggs in the abdomen of goby from the stomach of largemouth bass Table 2 shows the number of eggs in the abdomen of Biwa goby from the stomach of specimens. The standard body length of 7 specimens that were used in the study was ± 44.2 mm (min max: mm). The weight of the stomach contents of the specimens was 5.9 ± 2.9 g (min max: g). The stomach contents consisted of Biwa goby, Japanese smelt, stone moroko, an unidentified fish, and river shrimp (data not shown). All the specimens directly preyed on 1 3 mature females of Biwa goby and indirectly preyed on eggs of Biwa goby. Table 2. Stomach contents and the number of eggs of Biwa goby in the stomach of largemouth bass Micropterus salmoides in the Iso River No. Body length (mm) Weight of stomach contents (g) Category No. of Female/s No. of eggs of the goby Fishes/Shrimps Fishes/Shrimps Fishes/Shrimps Fishes Fishes/Shrimps Fishes/Shrimps Fishes/Shrimps Table 3. Stomach contents of largemouth bass Micropterus salmoides in Pond B. No Body length Weight of stomach %DM by weight to stomach. (mm) contents(g) Category (Numbers) contents Insects (1)/ DM (240) Insects (10)/DM (510) Insects (4)/DM (440) DM (1600) DM (1000) DM (1770) Insects (1)/DM (780) 66.0 Shrimps (1)/Insects (3) DM (330) DM (1750) DM (570) DM (700) DM (470) DM (1210) DM (550) UI (1)/DM (1110) DM (1500) Insect (1)/DM (620) Others DM (190) DM (100) DM (380) DM (190) DM (400)

6 UI: Unidentified. Other: rubber goods used in fishing (lure) Number of DM in the stomach of largemouth bass Table 3 shows the number and weight of DM from the stomachs of the specimens. DM was dominant in the diets of largemouth bass of Pond B in terms of quantity. The specimen that is selected as a monitor for determining the correlation coefficient between the weight and numbers of DM preyed on 137 individuals of DM per g. In other words, the correlation coefficient is 29 individuals per 0.01 g. The standard body length of the 26 specimens used in the study was ± 40.9 mm (min max: mm). The weight of the stomach contents of the specimens was 0.5 ± 0.9 g (min max: g). The stomach contents consisted of DM, strider, backswimmer, crayfish, and rubber goods. Each specimen preyed on approximately 100 to 1770 individuals of DM. Based on the remarkably high value (59.8% 100%) of the frequencies of DM by weight; it is supposed that the specimens mainly preyed on DM. Discussion The relationship between predation by largemouth bass and disruption in the distribution of fish fauna that is simultaneous with the increase in largemouth bass population in Japanese inland waters has been receiving increasing attention since the species was introduced into the Japanese waters. In this study, the stomach contents of largemouth bass from 4 points around Lake Biwa and 2 ponds without mesopredators, were examined from 2001 to 2005 in order to understand the feeding habits, their effects on native ecosystem, and the top-down effects. The important findings from this study are as follows: (1) remarkable changes in stomach contents among sampling sites, (2) mass predation of endemic goby in the Iso River, and (3) direct impact on low trophic levels. These points have been discussed below, in the same order: 1. In this study, the largemouth bass mainly preyed on fish and/or shrimps around Lake Biwa. On the other hand, the largemouth bass mainly preyed on insects or DM in the two ponds. This result is consistent with other studies that suggest that largemouth bass that have been introduced are flexible in terms of feeding habits and can change the target of predation in each environment (Yodo & Kimura, 1998). However, the frequency of prey occurrences differed among the sampling sites of Lake Biwa and also differed between sampling years at the same sampling site. In Izu-numa of Miyagi Prefecture, the largemouth bass mainly prey on daphnia up to 20 mm body length (BL) and gradually prey on fishes during further growth (Takahashi, 2002). This report is consistent with the data in the Kawamichi River, whereas it is completely inconsistent with the data from the two ponds. 2. In the Iso River, Biwa goby Gymnogobius isaza, which is an endemic goby of Lake Biwa and is categorized as near threatened in the Japanese Red Data Book, was largely preyed on by largemouth bass. The mass predation of Biwa goby is the first record, although freshwater common goby was one of the main diets, as reported by the previous studies (Maehata et al., 1987; Yodo & Kimura, 1998). Biwa goby is an easily available vulnerable prey for the largemouth bass in the breeding season; this is similar to that observed in the case of other migratory gobiid fishes (Azuma & Motomura, 1998). Furthermore, the specimens preyed on the mature females of the Biwa goby and indirectly preyed on the eggs before they were laid. These results indicate that predation by largemouth bass virtually equals that of the predation of fertilized eggs by egg feeders such as introduced bluegill and leads a great loss in the propagation of Biwa goby. 3. Various field studies have reported the direct and indirect effects of bass occurrence in reducing the diversity of small-bodied fish species; thereby creating more homogenous fish communities and alternating planktonic and benthic communities (Jackson, 2002; Maezono & Miyashita, 2003). In this study, largemouth bass intensively preyed on DM irrespective of the body size in the closed water system without mesopredators. It must be emphasized that in this study, of the 26 collected specimens, 22 specimens (BL greater than 75 mm) preyed on DM, and the frequency of DM in the stomach contents was very high. This result indicates that the predation by largemouth bass primarily affects the low trophic levels and secondarily causes remarkable changes in the ecosystem and water quality. Further studies are necessary for obtaining a complete report on the topdown effect due to the predation of largemouth bass in the study areas. The above-mentioned results suggest that largemouth bass is a euryphagous species; therefore, extermination of this species from nonnative habitats is of utmost importance. Acknowledgements The author wishes to thank Dr. T. Suzuki of the Faculty of Agriculture, Kinki University, for providing valuable advice and assistance with regard to collection specimens. 246

7 References Azuma M. & Motomura Y., Feeding habits of largemouth bass in a non-native environment: the case of a small lake with bluegill in Japan. Environ. Biol. Fish. 52, Environmental Agency, Impact on native biotic community and ecosystem by black bass and bluegill and the provision. Japan Wildlife Research Center, Tokyo (in Japanese). Jackson D. A., Ecological effects of Micropterus introductions: The dark side of black bass. American Fisheries Society Symposium. 31, Kawamura K. & Hosoya K., Discovery of an endangered cyprinid, Pseudorasbora pumila subsp. sensu Nakamura (1969), from the Miya River System, Mie. Jpn. J. Ichthyol. 44, (in Japanese with English abstract). Maezono Y. & Miyashita T., Community-level impacts induced by introduced largemouth bass and bluegill in farm ponds in Japan. Biol. Conserv. 109, Maehata M., Kuwahara M., Matsuda M. & Akiyama H., Feeding habits of largemouth bass Micropterus salmoides (Lacepede) in Lake Biwa (South Lake). The Annual Reports of the Biwako Bunkakan. 5, 1 14 (in Japanese). Maehata M., Dynamics of fishes around Biwako Bunkakan (South Lake). The Annual Reports of the Biwako Bunkakan. 11, (in Japanese). Takahashi K., Impact by largemouth bass on fish community- the case of Izu-numa and Uchi-numa. In: Invader of rivers and lakes and marshes, black bass-its biology and impacts on ecosystem (eds the Japanese Society of Japan) pp Kouseisha-kouseikaku, Tokyo (in Japanese). Yodo T., Micropterus salmoides. In: Handbook of alien species in Japan (eds the Ecological Society of Japan) pp Chijinshokan, Tokyo. Yodo T. & Kimura S., Feeding habits of largemouth bass Micropterus salmoides in Lakes Shorenji and Nishinoko, Central Japan. Nippon Suisan Gakkaishi. 64, (in Japanese with English abstract). 247

Countermeasures against Alien Fishes (Largemouth Bass and Bluegill) in Lake Biwa

Countermeasures against Alien Fishes (Largemouth Bass and Bluegill) in Lake Biwa 79 Countermeasures against Alien Fishes (Largemouth Bass and ) in Lake Biwa Atsuhiko IDE * and Shinsuke SEKI * Abstract Lake Biwa is one of the world's most ancient lakes, with an origin going back four

More information

Our foundation introduce Nature and conservation in Lake Izunuma Uchinuma.

Our foundation introduce Nature and conservation in Lake Izunuma Uchinuma. Our foundation introduce Nature and conservation in Lake Izunuma Uchinuma. The photo shows morning flight of greater white fronted geese. The geese leave their roosts for foraging at rice fields in the

More information

The Situation of Main Commercial Fishing in Lake Biwa

The Situation of Main Commercial Fishing in Lake Biwa The Situation of Main Commercial Fishing in Lake Biwa Then, I would like to explain the fisheries situation change in Lake Biwa for these 60 years by comparing with fluctuation of some fishing yields recorded

More information

Project Updates January 2015

Project Updates January 2015 Project Updates January 2015 In this project, I aim to determine how the invasive American mink (Neovison vison) adapts to a pristine-island ecosystem in Southern Chile, and to assess how mink impact native

More information

Effect of Different Feeds on the Reproductive Performance of Clarias Batrachus (1758)

Effect of Different Feeds on the Reproductive Performance of Clarias Batrachus (1758) Universities Research Journal 2011, Vol. 4, No. 2 Effect of Different Feeds on the Reproductive Performance of Clarias Batrachus (1758) Aye Aye Cho Abstract Two types of dietary feed were prepared to evaluate

More information

Aquatic Invasive Species. September 30 th, 2014, NOFNEC

Aquatic Invasive Species. September 30 th, 2014, NOFNEC Aquatic Invasive Species September 30 th, 2014, NOFNEC Overview Introduction Invasive Species of Concern Round Goby Phragmites Asian Carps How can you help? Decontamination Resources AOFRC 2 Introduction

More information

Lionfish Dissection: Gut Content Analysis

Lionfish Dissection: Gut Content Analysis Lionfish Dissection: Gut Content Analysis This lionfish dissection activity demonstrates how invasive species can impact the dynamics of a habitat through predation. Lionfish are voracious piscivores and

More information

Canon Envirothon Wildlife Curriculum Guidelines

Canon Envirothon Wildlife Curriculum Guidelines Canon Envirothon Wildlife Curriculum Guidelines Please note: the resources in this document are web links and require an internet connection to access them. Key Point 1: Knowledge of Wild Birds, Mammals

More information

Largemouth Bass. Max 30 inches Average 4-12 inches EATS

Largemouth Bass. Max 30 inches Average 4-12 inches EATS Largemouth Bass Max 30 inches Average 4-12 inches EATS Largemouth Bass may only be consumed if they are bigger than 12 to preserve the supply of Largemouth Bass in this pond. Please catch and release if

More information

Freshwater Biodiversity Conservation. Focus often on genetically distinct populations, species, and species communities. Wetla nds

Freshwater Biodiversity Conservation. Focus often on genetically distinct populations, species, and species communities. Wetla nds Freshwater Biodiversity Conservation Biodiversity = genes to ecosystems Focus often on genetically distinct populations, species, and species communities Wetla nds Why should we care? 1) valuable Ecosystem

More information

Productivity per unit area (m 2 ) Total Productivity (global)

Productivity per unit area (m 2 ) Total Productivity (global) Productivity per unit area (m 2 ) Total Productivity (global) 1 Important concepts: Biodiversity and Fishery Stocks. Looked at lot of diversity in class what is happening to it and why? Biodiversity variety

More information

Management of Small Impoundments

Management of Small Impoundments Management of Small Impoundments Chapter 12 (Lake food webs) Chapter 15 (Natural Lakes) Chapter 16 (Farm Ponds & Small Impoundments) Quote for today: "The gods do not deduct from man's allotted span the

More information

Introduction: JadEco, LLC PO BOX 445 Shannon, IL 61078

Introduction: JadEco, LLC PO BOX 445 Shannon, IL 61078 Introduction: was contacted to collected data on the fishery for Lake Holiday. AC Electroshocking was conducted at 2 locations on September 28, 2015. Fish population data was collected for a total of 100

More information

niche requirements, interspecific

niche requirements, interspecific Invasive salmonids: niche requirements, interspecific interactions and empty niches Timo Muotka University of Oulu Finnish Environment Institute Kai Korsu University of Oulu Ari Huusko Finnish Game & Fisheries

More information

BENSON PARK POND FISH SPECIES

BENSON PARK POND FISH SPECIES BENSON PARK POND FISH SPECIES Bluegill (Lepomis macrochirus) From the Greek, lepomis means scaled gill cover and macrochirus means large hand, in reference to its body shape and size. Average adult size

More information

Invasive Species. Grade Levels. Introduction. This activity is intended for grades 9 12.

Invasive Species. Grade Levels. Introduction. This activity is intended for grades 9 12. Invasive Species Grade Levels This activity is intended for grades 9 12 Introduction Located some 2, 400 miles from the nearest continental shore, the Hawaiian Islands are the most isolated group of islands

More information

Fish Community and Aquatic Ecosystem Responses to the Cessation of Eurasian Watermilfoil Chemical Treatment on Lake Ellwood, Wisconsin

Fish Community and Aquatic Ecosystem Responses to the Cessation of Eurasian Watermilfoil Chemical Treatment on Lake Ellwood, Wisconsin Fish Community and Aquatic Ecosystem Responses to the Cessation of Eurasian Watermilfoil Chemical Treatment on Lake Ellwood, Wisconsin Greg G. Sass Wisconsin Department of Natural Resources Fisheries and

More information

Invasive Versus Endemic Species

Invasive Versus Endemic Species School and University Partnership for Educational Renewal in Mathematics Invasive Versus Endemic Species Located some 2,400 miles from the nearest continental shore, the Hawaiian Islands are the most isolated

More information

Fall 2017: Problem Set 3 (DUE Oct 26; 50 points)

Fall 2017: Problem Set 3 (DUE Oct 26; 50 points) ESS 445 Introduction to Fisheries Science and Management: Biology, Ecology, Management, and Conservation of North American Freshwater Fishes and Aquatic Ecosystems Fall 2017: Problem Set 3 (DUE Oct 26;

More information

Fisheries and Illinois Aquaculture Center

Fisheries and Illinois Aquaculture Center Southern Illinois University Carbondale OpenSIUC Publications Fisheries and Illinois Aquaculture Center 4-1982 The Cyclic Stocking of Parentals in a Farm Pond to Produce a Population of Male Bluegill x

More information

Climate Change Impacts on Great Lakes Fishes

Climate Change Impacts on Great Lakes Fishes Climate Change Impacts on Great Lakes Fishes Stuart A. Ludsin ludsin.1@osu.edu Changing Climate Webinar Series The Ohio State University 19 April 2011 Today s Presentation Great Lakes Fish Community A

More information

Largemouth Bass Abundance and Aquatic Vegetation in Florida Lakes: An Alternative Interpretation

Largemouth Bass Abundance and Aquatic Vegetation in Florida Lakes: An Alternative Interpretation J. Aquat. Plant Manage. 34: 43-47 Largemouth Bass Abundance and Aquatic Vegetation in Florida Lakes: An Alternative Interpretation MICHAEL J. MACEINA 1 INTRODUCTION Hoyer and Canfield (1996) examined relations

More information

Invasive Versus Endemic Species

Invasive Versus Endemic Species School and University Partnership for Educational Renewal in Mathematics Invasive Versus Endemic Species Located some 2,400 miles from the nearest continental shore, the Hawaiian Islands are the most isolated

More information

STUDY PERFORMANCE REPORT

STUDY PERFORMANCE REPORT SUDY PERFORMANCE REPOR State: Michigan Project No.: F-81-R-1 Study No.: 495 itle: Assessment of lake trout populations in Michigan waters of Lake Superior Period Covered: October 1, 1999 to September 3,

More information

!"#$%&'() Mola mola *+,+-./

!#$%&'() Mola mola *+,+-./ Mola mola 2008 Summary A study on the reproductive biology of ocean sunfish Mola mola Toshiyuki akatsubo 1. Introduction Ocean sunfish, Mola mola, which belongs to the family Molidae in the order Tetraodontiformes,

More information

Sustaining Wild Species

Sustaining Wild Species Sustaining Wild Species tutorial by Paul Rich Outline 1. Why Preserve Wild Species? economic, medical, scientific, ecological, aesthetic, recreational, ethical reasons 2. Current Crisis of Extinction background

More information

Fish Survey Report and Stocking Advice for Loch Milton. (Loch a Mhuilinn), May 2011

Fish Survey Report and Stocking Advice for Loch Milton. (Loch a Mhuilinn), May 2011 Fish Survey Report and Stocking Advice for Loch Milton (Loch a Mhuilinn), May 2011 Jonah Tosney Freshwater Fisheries Biologist Wester Ross Fisheries Trust 1 Loch Milton (Loch a Mhuilinn) Fish Survey Report

More information

Section 2: Biodiversity at Risk

Section 2: Biodiversity at Risk Section 2: Biodiversity at Risk Preview Classroom Catalyst Objectives Biodiversity at Risk Current Extinctions Species Prone to Extinction How Do Humans Cause Extinctions? Habitat Destruction and Fragmentation

More information

Protection Measures Against Exotic Species

Protection Measures Against Exotic Species MONTANA AUDUBON P.O. Box 595 Helena, MT 59624 406-443-3949 mtaudubon@mtaudubon.org April 9, 2010 MO River Reservoir Management Plan Montana Fish, Wildlife & Parks P.O. Box 200701 Helena, MT 59620-0701

More information

Faster, better, cheaper: Transgenic Salmon. How the Endangered Species Act applies to genetically

Faster, better, cheaper: Transgenic Salmon. How the Endangered Species Act applies to genetically Faster, better, cheaper: Transgenic Salmon How the Endangered Species Act applies to genetically modified salmon History of Genetic Modification Genetic modification involves the insertion or deletion

More information

FISH PROTECTION STRUCTURES AND FISH PASSAGE FACILITIES. Toshio Hirose The honorary member of the Japan Society of Civil Engineers, Japan UNESCO EOLSS

FISH PROTECTION STRUCTURES AND FISH PASSAGE FACILITIES. Toshio Hirose The honorary member of the Japan Society of Civil Engineers, Japan UNESCO EOLSS FISH PROTECTION STRUCTURES AND FISH PASSAGE FACILITIES Kyohei Baba University of Tokyo, Japan Toshio Hirose The honorary member of the Japan Society of Civil Engineers, Japan Keywords: specific fish population,

More information

Changes in Age Structure and Diet of Invasive Centrarchid Fish Populations Under Management by Electrofishing

Changes in Age Structure and Diet of Invasive Centrarchid Fish Populations Under Management by Electrofishing Changes in Age Structure and Diet of Invasive Centrarchid Fish Populations Under Management by Electrofishing Lungi Roberts & Dr. David Clements Trinity Western University Langley, BC Study Area Introduction

More information

Protect Our Reefs Grant Interim Report (October 1, 2008 March 31, 2009) Principal investigators: Donald C. Behringer and Mark J.

Protect Our Reefs Grant Interim Report (October 1, 2008 March 31, 2009) Principal investigators: Donald C. Behringer and Mark J. Investigating the role of the spotted spiny lobster (Panulirus guttatus) in the recovery of the long spined sea urchin (Diadema antillarum) on the coral reefs of the Florida Keys Protect Our Reefs Grant

More information

2013 Annual Report on Aquaculture in Japan (Draft)

2013 Annual Report on Aquaculture in Japan (Draft) 2013 Annual Report on Aquaculture in Japan (Draft) UJNR Japan Panel 1. Introduction This report showed the latest topics in aquaculture, trends in production volume of major aquaculture species, and the

More information

Aquatic Invasive Species

Aquatic Invasive Species Aquatic Invasive Species Redpath Museum McGill University This presentation was made possible with funding from the PromoScience programme of NSERC www.wikipedia.org: public domain or licensed under a

More information

Bullseye Snakehead in Florida; FWCC s Approach to a Non-Native Fish. Kelly Gestring Non-Native Fish and Aquatic Wildlife Coordinator

Bullseye Snakehead in Florida; FWCC s Approach to a Non-Native Fish. Kelly Gestring Non-Native Fish and Aquatic Wildlife Coordinator Bullseye Snakehead in Florida; FWCC s Approach to a Non-Native Fish Kelly Gestring Non-Native Fish and Aquatic Wildlife Coordinator FWC s Non-Native Fish Program Established in 1970 to address FWC s concerns

More information

Preserving Biodiversity

Preserving Biodiversity Preserving Biodiversity How many species are there? 2.1 million currently described probably 3-50 million species most of those undiscovered are insects, fungi and bacteria 70% of known species are invertebrates

More information

NEVADA DEPARTMENT OF WILDLIFE STATEWIDE FISHERIES MANAGEMENT

NEVADA DEPARTMENT OF WILDLIFE STATEWIDE FISHERIES MANAGEMENT NEVADA DEPARTMENT OF WILDLIFE STATEWIDE FISHERIES MANAGEMENT FEDERAL AID JOB PROGRESS REPORTS F-2-52 216 CHIMNEY RESERVOIR WESTERN REGION NEVADA DEPARTMENT OF WILDLIFE, FISHERIES DIVISION JOB PROGRESS

More information

Atsuko YAMAGUCHI. Since the catches of these fish decrease as the waters, including those around western Kyushu and

Atsuko YAMAGUCHI. Since the catches of these fish decrease as the waters, including those around western Kyushu and Atsuko YAMAGUCHI distributions, feeding habits, reproductive behavior, off the coast of Nagasaki, western Kyushu. It is growth, migration, population structure, and other relatively large biological aspects

More information

EcoLogic Memorandum. TO: Ben Brezell; EDR FROM: Mark Arrigo RE: Possible Impacts of Dredging Snooks Pond DATE: 6/4/07

EcoLogic Memorandum. TO: Ben Brezell; EDR FROM: Mark Arrigo RE: Possible Impacts of Dredging Snooks Pond DATE: 6/4/07 EcoLogic Memorandum TO: Ben Brezell; EDR FROM: Mark Arrigo RE: Possible Impacts of Dredging Snooks Pond DATE: 6/4/07 Background EDR P.C. (EDR) has been contracted by a landowner to assess the feasibility

More information

Chapter 14. Wildlife, Fisheries and Endangered Species. What are we Saving? Traditional Single-Species Wildlife Management

Chapter 14. Wildlife, Fisheries and Endangered Species. What are we Saving? Traditional Single-Species Wildlife Management Chapter 14 Wildlife, Fisheries and Endangered Species What are we Saving? 1. Wild Creature in a wild habitat 2. Wild creature in a managed habitat 3. A population in a zoo 4. Genetic material The choice

More information

Fish Conservation and Management

Fish Conservation and Management Fish Conservation and Management CONS 486 Managing biotic communities Gardening, poisoning, and shocking what would PETA think? Chapter 10 Ross Managing biotic communities Topics Organism additions Organism

More information

National Research Institute of Fisheries Science, Japan 2. Integrative Oceanography Division, Scripps Institution of Oceanography, USA

National Research Institute of Fisheries Science, Japan 2. Integrative Oceanography Division, Scripps Institution of Oceanography, USA Distribution and Population Dynamics of Japanese Sardine, Anchovy and Chub Mackerel in the Kuroshio/Oyashio System: Seeking for Mechanistic Responses to Regime Shifts Akihiko Yatsu 1, Hiroshi Kubota 1,

More information

JadEco, LLC PO BOX 445 Shannon, IL 61078

JadEco, LLC PO BOX 445 Shannon, IL 61078 Introduction: With the assistance of Lake Holiday staff and volunteers, we were able to conduct an AC electrofishing survey on May 8, 27. Water temperatures were 2.3 C (8.5 F) and water clarity was decent

More information

2. Scientific investigation of eel in Belarus, achievements

2. Scientific investigation of eel in Belarus, achievements Role of the Republic of Belarus in conservation of the European eel world population Victor K. Rizevsky, Mikhail V. Pliuta,Vladimir V. Koltunov Scientific and Practical Center of the National Academy of

More information

Improving post-stocking survival of hatchery reared threatened fish species

Improving post-stocking survival of hatchery reared threatened fish species Improving post-stocking survival of hatchery reared threatened fish species Michael Hutchison, Adam Butcher, Andrew Norris, John Kirkwood and Keith Chilcott Threats A number of MDB fish species have declined

More information

Overview of Recreational Pond Management

Overview of Recreational Pond Management Overview of Recreational Pond Management extension November 13 th 2013 Forrest Wynne State Extension Specialist for Aquaculture Kentucky State University Ponds are built for some of the following purposes:

More information

Objectives. Summary. Background

Objectives. Summary. Background Lesson 5: Ruffe Musical Chairs Activity: Students use role-play to mimic the behavior of an invasive, non-native fish called Eurasian ruffe (pronounced rough) to experience firsthand how and why the species

More information

Comparative Survival of Pellet-Reared Muskellunge Stocked As Fingerlings In Bluegill Ponds With and Without Largemouth Bass

Comparative Survival of Pellet-Reared Muskellunge Stocked As Fingerlings In Bluegill Ponds With and Without Largemouth Bass 1 9 2 0 Comparative Survival of Pellet-Reared Muskellunge Stocked As Fingerlings In Bluegill Ponds With and Without Largemouth Bass George B. Beyerle Fisheries Research Report No. 1920 April 23, 1984 MICHIGAN

More information

SKIATOOK LAKE MANAGEMENT PLAN

SKIATOOK LAKE MANAGEMENT PLAN SKIATOOK LAKE MANAGEMENT PLAN Background Skiatook Lake impounds Hominy Creek, 5 miles west of Skiatook in Osage County, Oklahoma (Figure 1). Skiatook Lake covers 10,540 surface acres and was constructed

More information

Fisheries Management Zone 10:

Fisheries Management Zone 10: Fisheries Management Zone 10: Lake Trout Operational Objectives and Management Photo Credit: www.jamessmedleyoutdoors.com 2 FMZ 10: Lake Trout Operational Objectives and Management Lake trout are the second

More information

Scientific Name: Micropterus salmoides Common Name: Largemouth bass BISON No.:

Scientific Name: Micropterus salmoides Common Name: Largemouth bass BISON No.: Scientific Name: Micropterus salmoides Common Name: Largemouth bass BISON No.: 010010 Legal Status: Arizona, Species of Special Concern ESA, Endangered ESA, Proposed Endangered ESA, Proposed Threatened

More information

Monitoring Rusty Crayfish in Southern Ontario Streams and Rivers

Monitoring Rusty Crayfish in Southern Ontario Streams and Rivers Monitoring Rusty Crayfish in Southern Ontario Streams and Rivers Scott Reid, Tom Brooke, Jane Devlin, Joe Nocera Applied Research and Development Branch Background rusty crayfish first reported in 1960s:

More information

Which fish is for which state?

Which fish is for which state? By Jacob Buhrle Which fish is for which state? Oregon Chinook Salmon Florida Sailfish (saltwater) Largemouth Bass (freshwater) Eat or be Eaten: Chinook Salmon They feed on terrestrial and aquatic insects,

More information

Big Canyon 67 miles upstream. 38 miles upstream

Big Canyon 67 miles upstream. 38 miles upstream TEXOMA STRIPED BASS MANAGEMENT/RESEARCH Texoma is one of only about 1 reservoirs in the country that has a naturally reproducing striped bass population. Texoma is set off further from most reservoirs

More information

Abstract. The aim of this study was to determine the size and age compositions, growth

Abstract. The aim of this study was to determine the size and age compositions, growth Abstract The aim of this study was to determine the size and age compositions, growth rates, reproductive biology, dietary compositions and mesh selectivity of the King George whiting Sillaginodes punctata,

More information

Arizona Game and Fish Department Region VI Fisheries Program

Arizona Game and Fish Department Region VI Fisheries Program Arizona Game and Fish Department Region VI Fisheries Program Saguaro Lake Fish Survey Report April 18 th 21 st, 2016 Author: Bryant Dickens Report Date: July 7, 2016 The Arizona Game and Fish Department

More information

ATLANTIC STURGEON. Consultations on listing under the Species at Risk Act

ATLANTIC STURGEON. Consultations on listing under the Species at Risk Act ATLANTIC STURGEON Consultations on listing under the Species at Risk Act Information summary and questionnaire for consultations on adding two Atlantic Sturgeon populations to the List of Wildlife Species

More information

Reduction in Biological Diversity Section 4.1 p Section 4.3 p

Reduction in Biological Diversity Section 4.1 p Section 4.3 p Reduction in Biological Diversity Section 4.1 p. 57-65 Section 4.3 p. 72-78 Review Ecological Diversity A variety of ecosystems (mountains, forests, deserts) and how they interact together. Community Diversity

More information

System of Plankton Database Opening to the Public in Lake Biwa

System of Plankton Database Opening to the Public in Lake Biwa Sengupta, M. and Dalwani, R. (Editors). 2008 Proceedings of Taal2007: The 12 th World Lake Conference: 597-602 System of Plankton Database Opening to the Public in Lake Biwa Satoshi Ichise,Tetsuya Wakabayashi,

More information

EEB 122b PRACTICE SECOND MIDTERM

EEB 122b PRACTICE SECOND MIDTERM EEB 122b PRACTICE SECOND MIDTERM Page 1 1. You are interested in conducting an experiment with two competing species of plants. Below are the zero-growth isoclines for the two species. C D a) Draw the

More information

Instructions for using this template.

Instructions for using this template. Instructions for using this template. Remember this is Jeopardy, so where I have written Answer this is the prompt the students will see, and where I have Question should be the student s response. To

More information

HOW CAN WE HELP TO SUSTAIN AQUATIC BIODIVERSITY?

HOW CAN WE HELP TO SUSTAIN AQUATIC BIODIVERSITY? HOW CAN WE HELP TO SUSTAIN AQUATIC BIODIVERSITY? Marine Biodiversity The most marine biodiversity is found: 1. Coral reefs 2. Estuaries 3. Deep-ocean floor Biodiversity is higher near coasts than in the

More information

2000 AP ENVIRONMENTAL SCIENCE FREE-RESPONSE QUESTIONS

2000 AP ENVIRONMENTAL SCIENCE FREE-RESPONSE QUESTIONS 2000 AP ENVIRONMENTAL SCIENCE FREE-RESPONSE QUESTIONS 3. Species such as the dusky seaside sparrow, the passenger pigeon, and the woolly mammoth are extinct. Populations of other species have declined

More information

Fashion a Michigan Fish

Fashion a Michigan Fish 4ENVIRONMENTAL SCIENCE Fashion a Michigan Fish Key Concept: Adaptations Grade Level: 1 7 Education Subject: Science Success Indicator: After participating in this activity, learners will be able to: Classify

More information

6/2/2014. Carps. Common Carp. Silver Carp. Rohu. Bighead Carp. Other introductions: Gourami Dojo Golden apple snail Pacu Mosquito fish

6/2/2014. Carps. Common Carp. Silver Carp. Rohu. Bighead Carp. Other introductions: Gourami Dojo Golden apple snail Pacu Mosquito fish The Philippine aquaculture has been enhanced by species introduction. Major aquaculture commodities are exotics Exotic species are organisms transported outside their natural habitats Oreochromis niloticus

More information

Title: SYSTEM OF PLANKTON DATABASE OPENING TO THE PUBLIC IN LAKE BIWA. Satoshi ICHISE*,Tetsuya WAKABAYASHI*, Kenji YAMASHITA*and Shigeru AOKI*

Title: SYSTEM OF PLANKTON DATABASE OPENING TO THE PUBLIC IN LAKE BIWA. Satoshi ICHISE*,Tetsuya WAKABAYASHI*, Kenji YAMASHITA*and Shigeru AOKI* Title: SYSTEM OF PLANKTON DATABASE OPENING TO THE PUBLIC IN LAKE BIWA Satoshi ICHISE*,Tetsuya WAKABAYASHI*, Kenji YAMASHITA*and Shigeru AOKI* *Shiga prefectural Lake Biwa Environmental Research Institute

More information

FISH DISTRIBUTION WITHIN THE MONTLIMAR AND MICHAEL BOULEVARD CANALS

FISH DISTRIBUTION WITHIN THE MONTLIMAR AND MICHAEL BOULEVARD CANALS FISH DISTRIBUTION WITHIN THE MONTLIMAR AND MICHAEL BOULEVARD CANALS Tyler Crum, Department of Earth Sciences, University of South Alabama, Mobile, AL 36688. Email: tjc403@gmail.com. The City of Mobile

More information

The Fish Fauna of Cranberry Bog, Town of Burlington, Otsego County, N.Y.

The Fish Fauna of Cranberry Bog, Town of Burlington, Otsego County, N.Y. 80 The Fish Fauna of Cranberry Bog, Town of Burlington, Otsego County, N.Y. Steven M. Foster* ABSTRACT In June 1995 a baseline fish survey of Cranberry Bog was conducted in order to identify the species

More information

FISH COMMUNITIES AND FISHERIES OF THE THOUSAND ISLANDS AND MIDDLE CORRIDOR

FISH COMMUNITIES AND FISHERIES OF THE THOUSAND ISLANDS AND MIDDLE CORRIDOR St. Lawrence River Discussion Paper FISH COMMUNITIES AND FISHERIES OF THE THOUSAND ISLANDS AND MIDDLE CORRIDOR Issues Below is a synopsis of fish community issues and proposed management approaches. More

More information

Impacts of Aquatic Invasive Species on the Lake Superior Fishery. by Jeff Gunderson Minnesota Sea Grant Program

Impacts of Aquatic Invasive Species on the Lake Superior Fishery. by Jeff Gunderson Minnesota Sea Grant Program Impacts of Aquatic Invasive Species on the Lake Superior Fishery by Jeff Gunderson Minnesota Sea Grant Program Can humans really impact the fishery of such a large waterbody? Lake Superior Fishery Change

More information

A field energy budget for northern pike, an aquatic piscivore. James S. Diana School of Natural Resources and Environment University of Michigan

A field energy budget for northern pike, an aquatic piscivore. James S. Diana School of Natural Resources and Environment University of Michigan A field energy budget for northern pike, an aquatic piscivore James S. Diana School of Natural Resources and Environment University of Michigan Philosophical debate A man has only enough time to do what

More information

Evaluating the impact of fishing forage fish on predators. Ray Hilborn School of Aquatic and Fishery Sciences University of Washington

Evaluating the impact of fishing forage fish on predators. Ray Hilborn School of Aquatic and Fishery Sciences University of Washington Evaluating the impact of fishing forage fish on predators Ray Hilborn School of Aquatic and Fishery Sciences University of Washington Thanks to collaborators Thanks to funders Hilborn, Amoroso, Szuwalski

More information

Lake Butte des Morts Commercial Seining Project Report

Lake Butte des Morts Commercial Seining Project Report Lake Butte des Morts Commercial Seining Project Report Adam Nickel, Winnebago Gamefish (excluding sturgeon) Biologist, 22 December 2014 Conducting comprehensive fish surveys on the Upriver Lakes, including

More information

NEVADA DEPARTMENT OF WILDLIFE STATEWIDE FISHERIES MANAGEMENT

NEVADA DEPARTMENT OF WILDLIFE STATEWIDE FISHERIES MANAGEMENT NEVADA DEPARTMENT OF WILDLIFE STATEWIDE FISHERIES MANAGEMENT FEDERAL AID JOB PROGRESS REPORTS F-20-52 2016 LAKE TAHOE WESTERN REGION NEVADA DEPARTMENT OF WILDLIFE, FISHERIES DIVISION ANNUAL PROGRESS REPORT

More information

Investigating reproduction and abundance of bighead carp (Hypophthalmichthys nobilis) and silver carp (H. molitrix) in the Greenup pool, Ohio River

Investigating reproduction and abundance of bighead carp (Hypophthalmichthys nobilis) and silver carp (H. molitrix) in the Greenup pool, Ohio River Investigating reproduction and abundance of bighead carp (Hypophthalmichthys nobilis) and silver carp (H. molitrix) in the Greenup pool, Ohio River Nathan Fleshman Dr. Thomas Jones Photo: USGS Photo: USGS

More information

Abstract. Introduction

Abstract. Introduction Artificial Reefs Contribute to Marine Resources Enhancement Sadamitsu Akeda National Research Institute of Fisheries Engineering Fisheries Research Agency, Japan email: akeda@fra.affrc.go.jp Abstract When

More information

POLYCULTURE OF LARGEMOUTH BASS (Micropterus salmoides) WITH BLUE TILAPIA (Oreochromis aurea): USING TILAPIA PROGENY AS FORAGE

POLYCULTURE OF LARGEMOUTH BASS (Micropterus salmoides) WITH BLUE TILAPIA (Oreochromis aurea): USING TILAPIA PROGENY AS FORAGE POLYCULTURE OF LARGEMOUTH BASS (Micropterus salmoides) WITH BLUE TILAPIA (Oreochromis aurea): USING TILAPIA PROGENY AS FORAGE William A. Wurts a, D. Allen Davis b, Edwin H. Robinson c a Cooperative Extension

More information

Climate Change Effects and Reef Fishes in the Mariana Islands

Climate Change Effects and Reef Fishes in the Mariana Islands Climate Change Effects and Reef Fishes in the Mariana Islands Terry J. Donaldson University of Guam Marine Laboratory and IUCN-SSC Coral Reef Fishes Specialist Group Overview Reef systems of the Mariana

More information

NURSERY POND Fish Management Report. Jason C. Doll Assistant Fisheries Biologist

NURSERY POND Fish Management Report. Jason C. Doll Assistant Fisheries Biologist NURSERY POND 2004 Fish Management Report Jason C. Doll Assistant Fisheries Biologist FISHERIES SECTION INDIANA DEPARTMENT OF NATURAL RESOURCES DIVISION OF FISH AND WILDLIFE I.G.C. South, Room W273 402

More information

Winter Drawdown Issues of Concern

Winter Drawdown Issues of Concern Winter Drawdown Issues of Concern Wetland Connectivity Amphibians Fisheries Winter Drawdown Wetland Connectivity Wetland complex near Osprey Creek is not responsive to lake level Wetland at upper end of

More information

Trout Production at the Bobby N. Setzer Fish Hatchery

Trout Production at the Bobby N. Setzer Fish Hatchery Trout Production at the Bobby N. Setzer Fish Hatchery A informational slide show on how trout are reared. Prepared by NCWRC staff for the Trout in the Classroom program. NC Wildlife Resources Commission

More information

Geology. Key Factors. Overfishing. Great Lakes Fishes. Historical Fishing. About 10,000 years since last glacial retreat very young ecologically

Geology. Key Factors. Overfishing. Great Lakes Fishes. Historical Fishing. About 10,000 years since last glacial retreat very young ecologically Great Lakes Fishes Geology About 10,000 years since last glacial retreat very young ecologically Largest surface freshwater system on earth 21% of world s supply 84% of North America s supply Five unique

More information

FISHERIES BASELINE ASSESSMENT

FISHERIES BASELINE ASSESSMENT FISHERIES BASELINE ASSESSMENT Outline 2 1- Past trends and current situation Catch Catch in the Mekong ; comparisons Fisheries and food security Biodiversity Global level Local level Drivers of the fisheries

More information

The Prevalence of Different Species of Fish in Four Different Habitats of Douglas Lake

The Prevalence of Different Species of Fish in Four Different Habitats of Douglas Lake Lukas Bell-Dereske EEB 320 Professor Amy Schrank August 16, 2007 Abstract The Prevalence of Different Species of Fish in Four Different Habitats of Douglas Lake How fish abundance and diversity varies

More information

COASTAL MARINE PROTECTED AREAS IN JAPAN AND THEIR INSTITUTIONAL CHARACTERISTICS

COASTAL MARINE PROTECTED AREAS IN JAPAN AND THEIR INSTITUTIONAL CHARACTERISTICS COASTAL MARINE PROTECTED AREAS IN JAPAN AND THEIR INSTITUTIONAL CHARACTERISTICS Nobuyuki Yagi, The University of Tokyo, yagi@fs.a.u-tokyo.ac.jp Yukiko Takada, The University of Tokyo, luvmeplus91@hotmail.com

More information

Pond Management. Dan Lekie Agriculture & Natural Resource Agent K-State Research & Extension Johnson County

Pond Management. Dan Lekie Agriculture & Natural Resource Agent K-State Research & Extension Johnson County Pond Management Dan Lekie Agriculture & Natural Resource Agent K-State Research & Extension Johnson County Pond Management Basics Plant ID and Control Fish Management Wildlife Concerns Management Options

More information

ACTIVITY FIVE SPECIES AT RISK LEARNING OBJECTIVES: MATERIALS: Subjects: Science, math, art, history

ACTIVITY FIVE SPECIES AT RISK LEARNING OBJECTIVES: MATERIALS: Subjects: Science, math, art, history ACTIVITY FIVE SPECIES AT RISK Subjects: Science, math, art, history LEARNING OBJECTIVES: Differentiate between species that are threatened, endangered, or extinct. Identify biological and human-influenced

More information

SECTION 3: THE FISHES OF THE TWEED AND THE EYE

SECTION 3: THE FISHES OF THE TWEED AND THE EYE SECTION 3: THE FISHES OF THE TWEED AND THE EYE C.2: Beardie Barbatulus Stone Loach The inhabitants of Italy.. cleaned the Loaches, left them some time in oil, then placed them in a saucepan with some more

More information

Aquatic Plant Management and Importance to Sport Fisheries

Aquatic Plant Management and Importance to Sport Fisheries Aquatic Plant Management and Importance to Sport Fisheries Presentation to Michigan Inland Lakes Convention May 2014 Mike Maceina Professor Emeritus School of Fisheries, Aquaculture, and Aquatic Sciences

More information

SMOOTH HAMMERHEAD SHARK (HHS)

SMOOTH HAMMERHEAD SHARK (HHS) SMOOTH HAMMERHEAD SHARK (HHS) (Sphyrna zygaena) HHS1 1. FISHERY SUMMARY Smooth hammerhead sharks (Sphyrna zygaena) are not currently managed under the QMS. No assigned fishing allowances exist. However,

More information

The Purchase and Release of Two Endangered Species: Mekong Giant Catfish (Pangasianodon gigas) and Giant Barb (Catlocarpio siamensis)

The Purchase and Release of Two Endangered Species: Mekong Giant Catfish (Pangasianodon gigas) and Giant Barb (Catlocarpio siamensis) The Purchase and Release of Two Endangered Species: Mekong Giant Catfish (Pangasianodon gigas) and Giant Barb (Catlocarpio siamensis) by Zeb Hogan 1, Ngor Pengbun 2, and Nicolaas van Zalinge 3 1. Department

More information

THE WOLF WATCHERS. Endangered gray wolves return to the American West

THE WOLF WATCHERS. Endangered gray wolves return to the American West CHAPTER 7 POPULATION ECOLOGY THE WOLF WATCHERS Endangered gray wolves return to the American West THE WOLF WATCHERS Endangered gray wolves return to the American West Main concept Population size and makeup

More information

Oceans Humans both depend on it and threaten it with their activities

Oceans Humans both depend on it and threaten it with their activities Oceans Humans both depend on it and threaten it with their activities Oceans Water covers nearly ¾ of the Earth s surface More than 50% of the world s population lives within an hour of the coast Oceans

More information

A FISHING BAN ON GRENADIER POND

A FISHING BAN ON GRENADIER POND A FISHING BAN ON GRENADIER POND The activity or sport of fishing should be banned commencing spring of 2013 pending a study to determine whether, and in what particular circumstances, fishing can be considered

More information

HARBORR. Prepared byy 013 (05)

HARBORR. Prepared byy 013 (05) SURVEYS FOR THE MUDPUPPY (NECTURUS MACULOSUS) IN LAKE L MICHIGAN NEAR N MONTROSE HARBORR Prepared byy Christopher A. Phillips, Andrew R. Kuhns, and Jeremy S. Tiemann Report Prepared For US Army Corp of

More information

Significant Ecological Marine Area Assessment Sheet

Significant Ecological Marine Area Assessment Sheet Significant Ecological arine Area Assessment Sheet Name: ouhora arbour arine Values Summary: The entrance subtidal channel, tidal flats, seagrass mangrove and saltmarsh habitats of ouhora arbour have given

More information

A ONE-HUNDRED-DAY CULTURE TRIAL OF THREE DIFFERENT FAMILIES OF GIFT TILPIA, OREOCHROMIS NILOTICUS

A ONE-HUNDRED-DAY CULTURE TRIAL OF THREE DIFFERENT FAMILIES OF GIFT TILPIA, OREOCHROMIS NILOTICUS 8 TH INTERNATIONAL SYMPOSIUM ON TILAPIA IN AQUACULTURE 2008 271 ZAIJIE DONG 1,2,3, PAO XU 2,3, JIE HE 2, JIAN ZHU 2,3, SHOULING ZHANG 2, ZHUANG XIE 1 1. College of Animal Science and Technology, Nanjing

More information

The Uptake of Mercury and Relationship to Food Habits of Target Fish Species in the South River and South Fork Shenandoah River

The Uptake of Mercury and Relationship to Food Habits of Target Fish Species in the South River and South Fork Shenandoah River The Uptake of Mercury and Relationship to Food Habits of Target Fish Species in the South River and South Fork Shenandoah River G. Murphy, T. Newcomb, and D. Orth Department of Fisheries and Wildlife Sciences

More information

NEVADA DEPARTMENT OF WILDLIFE STATEWIDE FISHERIES MANAGEMENT

NEVADA DEPARTMENT OF WILDLIFE STATEWIDE FISHERIES MANAGEMENT NEVADA DEPARTMENT OF WILDLIFE STATEWIDE FISHERIES MANAGEMENT FEDERAL AID JOB PROGRESS REPORTS F-20-49 2013 LAKE TAHOE WESTERN REGION NEVADA DEPARTMENT OF WILDLIFE, FISHERIES DIVISION ANNUAL PROGRESS REPORT

More information