Hydroacoustic surveys of Otsego Lake s pelagic fish community,
|
|
- Anthony Black
- 5 years ago
- Views:
Transcription
1 Hydroacoustic surveys of Otsego Lake s pelagic fish community, Holly A. Waterfield 2 and Mark Cornwell 3 INTRODUCTION Hydroacoustic surveys were conducted in May and November 2010 to estimate pelagic fish abundance in Otsego Lake (Otsego County, NY). Following their introduction in 1986, alewife (Alosa pseudoharengus) quickly became the most abundant forage fish in Otsego Lake (Foster 1990) and had major impacts on trophic relationships, chlorophyll a, water clarity, and hypolimnetic oxygen depletion rates (Warner 1999). Walleye (Sander vitreus) stocking resumed in 2000 (previously stocked through 1934) to establish a recreational fishery while at the same time introducing a predator which would potentially control the alewife population. The acoustic surveys reported on here are part of an ongoing effort to document changes in the pelagic fish community and lake trophic condition. Comparisons are made to the results of past hydroacoustic surveys (1996 to 2007) which were summarized by Brooking and Cornwell (2008). METHODS Acoustic surveys were conducted on the nights of 25 May and 11 November 2010, beginning at least 1 hour after dark. The May survey was conducted from north to south; the November survey was conducted from south to north, following a zig-zag pattern from shore to shore (Figure 1). Approximately east-west transects were connected with a diagonal zig to yield two sets of parallel transects for additional analysis of methods and statistical approaches. Data were collected using a BioSonics DtX echosounder with either a 123kHz (7.5 o beam) or 120kHz (7.7 o beam) transducer; data collection settings for each survey are listed in Table 1. Performance of each transducer was checked against a standard tungsten carbide sphere. Table 1. Data collection settings for 25 May and 11 November 2010 acoustic surveys conducted on Otsego Lake, NY. Survey Date Number of transects Downlooking Frequency (khz) Average Survey Speed (m/s) Pulse Duration (ms) Ping Rate (pps) 5/25/ /11/ Made possible by 2007 NSF grant entitled Acquisition of hydroacoustic and associated instrumentation for fisheries research (DBI: ). 2 Research Support Specialist. SUNY Oneonta Biological Field Station, Cooperstown, NY. 3 Assistant Professor, SUNY Cobleskill Department of Fisheries and Wildlife. Cobleskill, NY.
2 Figure 1. Bathymetric map of Otsego Lake, NY with acoustic transects surveyed May 25, 2010 (1-14 from north to south) and 11 November 2010 (1-16 from south to north). Hydroacoustic data were analyzed using the Sonar5-Pro post processing system (Sonar5) following conversion of the raw acoustic files to Sonar5-compatible formats (Balk and Lindem 2007). Only echoes from the open-water were analyzed; to achieve this, surface and bottom exclusion zones were established on each echogram. The surface exclusion zone was established from the surface to 2.5m to eliminate data from the transducer s near-field and surface noise. The bottom boundary included a margin of approximately 0.5 m above the actual detected bottom to avoid inclusion of bottom echoes in abundance estimates. Echograms were visually inspected to remove echoes from targets other than fish (i.e., submerged vegetation). Passive noise, calculated from passive listening data collected prior to each survey, was subtracted from all files before analysis. Fish density (#/ha) was calculated using the echo counting method in Sonar5 (Balk and Lindem 2007) based on a minimum in situ target strength threshold of -55 db. The TS threshold used in past analyses was -61dB; the higher threshold of -55 db was used to exclude an abundance of small targets (peak TS of -70 db) in the alewife abundance estimate (Figure 2). Target strengths of -61 to -55 db have been associated with alewife ranging in length from 1.5 to 2.0 cm (Warner 2002), a size class that would not be present at the time of either 2010 survey. Abundance estimates were determined for predator-sized (TS >-35 db) and preysized (TS -55dB to -34dB) targets.
3 Figure 2. Target strength distribution for even numbered transects surveyed 11 November 2010, Otsego Lake, NY. Note the abundance of low-intensity targets from -70 db to -56 db, overlapping with the standard minimum TS threshold of -61 db. Based on this distribution, the threshold used in this analysis was established at -55dB. Variable small mesh experimental gill nets were set concurrent with each survey. Each net was composed of seven 3-meter wide panels of different mesh sizes (6.2, 8, 10, 12.5, 15, 18.7, and 25mm bar mesh). Nets were 21 meters long by 6 meters deep and set from the surface downward or from the bottom upward. Three nets were set on the nights of 25 May and 11 November 2010 for about 12 hours each, set just before dark and pulled early morning. Fish were tallied by panel and vertical position (top, middle or bottom) in the net. Species, length, and weight were recorded for all fish caught. RESULTS AND DISCUSSION Lake-wide acoustic fish density in May was estimated to be 108 fish/ha for all fish (alewife and predators combined; 95% CI +/- 137 fish/ha) based on the 14 transects (Table 2). Fish density estimates varied among transects ranging from 0 fish/ha for several transects to 725 fish/ha for transect 14, the southern-most transect surveyed (Table 2). This is the lowest density estimate since spring surveys began in 2004 (Table 3; Brooking and Cornwell 2008). Figure 3 is a plot of acoustic targets based on target strength (db) their depth (m) in the water column relative to the surface. A grouping of targets having a range in TS typically associated with alewife was observed below 30m (Figure 3); given this overlap TS and 100% alewife in the gill nets, these targets contribute to the abundance estimate that is considered to be representative of alewife abundance. Gill nets caught 108 alewife, all concentrated in the surface net (fishing 0 to 6m); 75% of these were located in the top 2 meters, outside of the acoustically-surveyed portion of the water column. If this vertical distribution is representative of lake-wide alewife distribution, it is
4 possible that the acoustic density may actually be four times that estimated by acoustic survey. If that is the case, alewife density may be more in line with estimates from the recent past, at 400 fish/ha. Table 2. Fish abundance estimates of alewife and predator-sized targets for transects surveyed 25 May 2010, including lake-wide mean, standard error (SE) and 95% confidence intervals. Fish Density (f/ha) Transect alewife predators mean SE % CI Table 3. Alewife abundance estimates (fish/ha) for spring surveys conducted between 2004 and Year Fish/ha # transects stdev 95% CI
5 Total acoustic fish abundance in November was estimated to be 279 fish/ha (alewife + predators; 95% CI +/- 249 fish/ha) across 16 transects (Table 4). This estimate is the lowest reported for a fall survey since acoustic surveys began on Otsego Lake in 1996 (Table 5). As seen in the May survey, density estimates varied greatly among transects, ranging from 16 fish/ha to 1492 fish/ha on transect 14, between Hyde Bay and the western shore of the lake (Figure 1). The majority of acoustic targets were observed at depths greater than 10m (Figure 4). As observed in May, a grouping of targets was observed around or below 35m depth and having in situ TS values within the range typically associated with alewife (Figure 4). A cluster of predator-size targets is seen in both transect sets between 20 to 35m depth, a depth range typically occupied by walleye (Potter et al. 2010). Corresponding gill nets caught a total of eight fish, all alewife in the deepest net, fishing 8-14m. Table 4. Fish abundance estimates of alewife and predator-sized targets for transects surveyed 11 November 2010, including lake-wide mean, standard error (SE) and 95% confidence intervals. Fish Density (f/ha) Transect "alewife" predators mean SE % CI
6 3a. 3b. Figure 3. Target strength (db) versus depth (m) relative to the surface for odd-numbered (a) and even-numbered (b) transects surveyed May Table 5. Abundance estimates (fish/ha) from fall acoustic surveys conducted between 1996 and Modified from Brooking and Cornwell (2008). Fall Alewife Abundance Fall Predator Abundance Year #/ha # transects stdev 95% CI #/ha # transects stdev 95% CI results show a drastic decrease in estimated spring and fall alewife density compared to past surveys (Tables 3 and 5), even when considering the confidence intervals and their reflection of the high degree of variability among transect density estimates. This decrease in estimated alewife abundance is corroborated by relatively low gill net catch for both surveys, as well as results documented in other ongoing studies, including increased mean alewife size concurrent with decreased trap net catch rate (Potter 2010) and the prevalence of alewife in stomachs of captured walleye (McBride and Cornwell 2008). Further refinement of methods to assess shallow fish targets concentrated in the upper 2 meters of the water column is underway by researchers around the Great Lakes region; employment of such methods will lead to more accurate estimates of alewife abundance in Otsego Lake.
7 4a. 4b. Figure 4. Target strength (db) versus depth (m) relative to the surface for odd-numbered (a) and even-numbered (b) transects surveyed 11 November REFERENCES Balk, H. and T. Lindem Sonar4 and Sonar5 post processing systems, operator manual version 5.9.7, 420p. Lindem Data Acquisition Humleveien 4b Oslo Norway. Bowers, B.E. and H.A. Waterfield Investigating walleye (Sander vitreus) behavior and optimal forage theory in Otsego Lake, New York. In 43 rd Ann. Rept. (2010). SUNY Oneonta Biol. Fld. Sta., SUNY Oneonta. Brooking, T.E. and M.D. Cornwell Hydroacoustic surveys of Otsego Lake, In 40 th Ann Rept. (2007). SUNY Oneonta Biol. Fld. Sta., SUNY Oneonta. Foster, J.R Introduction of the alewife (Alosa pseudoharengus) into Otsego Lake. In 22 nd Ann. Rept. (1989). SUNY Oneonta Biol. Fld. Sta., SUNY Oneonta. Cornwell, M.D. and N.D. McBride Walleye (Sander vitreus) reintroduction update: Walleye stocking, gill netting In 41 st Ann. Rept. (2008). SUNY Oneonta Biol. Fld. Sta., SUNY Oneonta. Potter, J Littoral fish community survey of Rat Cove & Brookwood Point, summer In 42 nd Ann. Rept. (2009). SUNY Oneonta Biol. Fld. Sta., SUNY Oneonta. Warner, D.M Alewives in Otsego Lake, NY.: a comparison of their direct and indirect mechanisms of impact on transparency and chlorophyll a. Occas. Pap. No. 32. SUNY Oneonta Biol. Fld. Sta., SUNY Oneonta.
Alewife (Alosa pseudoharengus) density as a predictor of open water utilization by walleye (Sander vitreus) in Otsego Lake, NY
Alewife (Alosa pseudoharengus) density as a predictor of open water utilization by walleye (Sander vitreus) in Otsego Lake, NY B.E. Bowers 1 INTRODUCTION Walleye (Sander vitreus) are typically associated
More informationHydroacoustic survey of Otsego Lake, 2004
Hydroacoustic survey of Otsego Lake, 2004 Thomas E. Brooking 1 Mark D. Cornwell 2 INTRODUCTION Fishery managers must often rely on uncertain information regarding abundance and distribution of offshore
More informationRat Cove and Brookwood Point littoral fish survey, 2002
Rat Cove and Brookwood Point littoral fish survey, 2 Katie Wayman 1 INTRODUCTION During the summer of 2, efforts to monitor the Otsego Lake littoral fish community continued with trap netting at both Rat
More informationStatus of rainbow smelt (Osmerus mordax) in the Mohican Canyon Tributary, May 2014
Status of rainbow smelt (Osmerus mordax) in the Mohican Canyon Tributary, May 2014 Matthew J. Best 1 INTRODUCTION Rainbow smelt (Osmerus mordax) were thought to have been introduced into Otsego Lake in
More informationCompilation of alewife (Alosa pseudoharengus) trap net catch in Rat Cove, Otsego Lake,
Compilation of alewife (Alosa pseudoharengus) trap net catch in Rat Cove, Otsego Lake, 1989-22 Michael S. Gray 1 and John R. Foster 2 INTRODUCTION Trap netting in the eulittoral area of Rat Cove began
More informationWalleye (Sander vitreus) reintroduction update: Walleye stocking, gill netting 2008
Walleye (Sander vitreus) reintroduction update: Walleye stocking, gill netting 28 Mark D. Cornwell 1 and Norman D. McBride 2 INTRODUCTION In 2 a multi-year stocking program was initiated to re-introduce
More informationWalleye (Sander vitreus) reintroduction update: Walleye stocking, gill netting and diet analysis 2007
Walleye (Sander vitreus) reintroduction update: Walleye stocking, gill netting and diet analysis 2007 Mark D. Cornwell 1 and Norman D. McBride 2 INTRODUCTION In 2000 a multi-year project was initiated
More informationAPPENDIX 3E HYDROACOUSTIC ANALYSIS OF FISH POPULATIONS IN COPCO AND IRON GATE RESERVOIRS, CALIFORNIA NOVEMBER
APPENDIX 3E HYDROACOUSTIC ANALYSIS OF FISH POPULATIONS IN COPCO AND IRON GATE RESERVOIRS, CALIFORNIA NOVEMBER 23 February 24 PacifiCorp Fish Resources FTR Appendix 3E.doc Hydroacoustic Analysis of Fish
More informationCharacterization of spawning rainbow smelt (Osmerus mordax) in the Mohican Canyon Creek, Otsego Lake, NY
Characterization of spawning rainbow smelt (Osmerus mordax) in the Mohican Canyon Creek, Otsego Lake, NY Matthew Best 1 and John R. Foster 2 Abstract: Rainbow smelt (Osmerus mordax), a key component of
More informationWalleye (Stizostidion vitreum) reintroduction update: Walleye stocking, gill netting and electrofishing summary
Walleye (Stizostidion vitreum) reintroduction update: Walleye stocking, gill netting and electrofishing summary 2000-2 Mark D. Cornwell 1 ABSTRACT Walleye (Stizostidion vitreum)stocking to Otsego Lake
More informationAlewife (Alosa pseudoharengus) abundance in Onondaga Lake, A report to Onondaga County. January 2014
Alewife (Alosa pseudoharengus) abundance in Onondaga Lake, 2013. A report to Onondaga County. January 2014 Lars G. Rudstam, Per G. Rudstam, Elizabeth M. Keller. Cornell Biological Field Station, Department
More informationDouglas J. Peck 1, John R. Foster 2, Joseph C. Lydon 3, Kevin J. Poole and Mark D. Cornwell 2
The effectiveness of spring stream electro-fishing, trap netting and lake electro-fishing for determining walleye (Sander vitreus) abundance in Otsego Lake, NY Douglas J. Peck 1, John R. Foster 2, Joseph
More informationDiet analysis of predator fish in Otsego Lake prior and subsequent to walleye (Sander vitreus) stocking, 2005
Diet analysis of predator fish in Otsego Lake prior and subsequent to walleye (Sander vitreus) stocking, 2005 Tom Somerville 1 INTRODUCTION Otsego Lake (42 41 N-70 W) is the headwaters of the glacially-created
More informationLAKE WASHINGTON SOCKEYE SALMON STUDIES. Richard E. Thorne and James J. Dawson
FRI-UW-7613 October 1976 LAKE WASHINGTON SOCKEYE SALMON STUDIES 1975 1976 by Richard E. Thorne and James J. Dawson Final Report Service Contract No. 648 Washington State Department of Fisheries For the
More informationApplication of a New Method for Monitoring Lake Trout Abundance in Yukon: Summer Profundal Index Netting (SPIN)
Application of a New Method for Monitoring Lake Trout Abundance in Yukon: Summer Profundal Index Netting (SPIN) Prepared by: Lars Jessup Nathan Millar November 2011 Application of a New Method for Monitoring
More informationQuantitative description of predator diets prior and subsequent to walleye (Steizostedion vitreum) stocking in Otsego Lake
Quantitative description of predator diets prior and subsequent to walleye (Steizostedion vitreum) stocking in Otsego Lake Brian McDonnell 1 and Mark Cornwell 2 ABSTRACT This study was designed to evaluate
More informationHydroacoustic Analysis of Fish Populations in Copco and Iron Gate Reservoirs, California
Hydroacoustic Analysis of Fish Populations in Copco and Iron Gate Reservoirs, California Prepared for: PacifiCorp Portland, Oregon Prepared by: J.M. Eilers and B.J. Eilers MaxDepth Aquatics, Inc. Bend,
More informationFine-Scale Survey of Right and Humpback Whale Prey Abundance and Distribution
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Fine-Scale Survey of Right and Humpback Whale Prey Abundance and Distribution Joseph D. Warren School of Marine and Atmospheric
More informationDistribution and movements of walleye (Sander vitreum) in Otsego Lake, New York
Distribution and movements of walleye (Sander vitreum) in Otsego Lake, New York Isaac T. Golding 1, E. Reinicke 2 and John R. Foster 3 Abstract: Habitat utilization and movements of walleyes in Otsego
More informationFurther evaluation of the lake trout (Salvelinus namaycush) spawning habitat in Otsego Lake
Further evaluation of the lake trout (Salvelinus namaycush) spawning habitat in Otsego Lake Wesley Tibbits 1 INTRODUCTION Since the late 1800s, lake trout populations have been augmented in Otsego Lake,
More informationWalleye (Sander vitreus) seasonal activity and habitat utilization in Otsego Lake, New York
Walleye (Sander vitreus) seasonal activity and habitat utilization in Otsego Lake, New York Justin Potter 1, John M. Byrne 2, Daniel S. Stich 2 and John R. Foster 3 Abstract: Ultrasonic telemetry was used
More informationAlberta Conservation Association 2011/12 Project Summary Report. Project Name: Walleye Stock Assessment Program 2011/12 Moose and Fawcett Lakes
Alberta Conservation Association 2011/12 Project Summary Report Project Name: Walleye Stock Assessment Program 2011/12 Moose and Fawcett Lakes Fisheries Program Manager: Peter Aku Project Leader: Clayton
More informationDEVELOPMENT OF A HYDROACOUSTIC SURVEY DESIGN TO QUANTIFY PREY FISH ABUNDANCE IN THE MINNESOTA WATERS OF LAKE SUPERIOR
Minnesota Department of Natural Resources Investigational Report 53, 26 DEVELOPMENT OF A HYDROACOUSTIC SURVEY DESIGN TO QUANTIFY PREY FISH ABUNDANCE IN THE MINNESOTA WATERS OF LAKE SUPERIOR Tom Hrabik
More informationSize, Age and Growth ofnesting Male Pumpkinseed Sunfish (Lepomis gibbosus) in Rat Cove, Otsego Lake, NY
126 Size, Age and Growth ofnesting Male Pumpkinseed Sunfish (Lepomis gibbosus) in Rat Cove, Otsego Lake, NY John R. O'Connor l, John R. Foster, John Urban 3, and Jim Hakala 4 ABSTRACT Male pumpkinseed
More informationI. Ostrovskyet al., 2008
I. Ostrovskyet al., 2008 1 Outline Background Materials and procedures Results and Discussion Conclusion 2 Background The emission of highly potent greenhouse gases has contributed to the increased atmospheric
More informationNEED FOR SUPPLEMENTAL BATHYMETRIC SURVEY DATA COLLECTION
305 West Grand Avenue, Suite 300 Montvale, New Jersey 07645 Phone 201.930.9890 Fax 201.930.9805 www.anchorqea.com M EMORANDUM To: Caroline Kwan and Nica Klaber U.S. Environmental Protection Agency Region
More informationQualark Creek. Split-beam system. History. Using split-beam technology. Single beam system (fish finder) What is a Sonar (Hydroacoustic) system?
Single beam system (fish finder) Qualark Creek Not particularly good for counting fish! How far away YES! How big.no! Which way it s going..no! Dept. Fisheries & Oceans Canada Applied Technologies George
More informationQualark Creek. History
Qualark Creek Dept. Fisheries & Oceans Canada Applied Technologies George Cronkite, Hermann J Enzenhofer, John Holmes & Jim Krivanek History Originally used split-beam technology (1993-1998) Ideal site
More informationThe development of novel sampling protocols for endangered fish species in Irish lakes: Trials and Triumphs Inland Fisheries Ireland
The development of novel sampling protocols for endangered fish species in Irish lakes: Trials and Triumphs Inland Fisheries Ireland Emma Morrissey Overview 15 minute presentation: The idea Introduction
More informationCampbell River Project Water Use Plan
Campbell River Project Water Use Plan Upper and Lower Campbell Lake Fish Spawning Success Assessment Implementation Year 1 Reference: JHTMON-3 JHTMON-3: Upper and Lower Campbell Lake Fish Spawning Success
More information14/10/2013' Bathymetric Survey. egm502 seafloor mapping
egm502 seafloor mapping lecture 10 single-beam echo-sounders Bathymetric Survey Bathymetry is the measurement of water depths - bathymetry is the underwater equivalent of terrestrial topography. A transect
More informationEvaluation of the Klein HydroChart 3500 Interferometric Bathymetry Sonar for NOAA Sea Floor Mapping
Evaluation of the Klein HydroChart 3500 Interferometric Bathymetry Sonar for NOAA Sea Floor Mapping Yuhui Ai, Straud Armstrong and Dean Fleury L-3 Communications Klein Associates, Inc. 11 Klein Dr. Salem,
More informationUNNAMED LAKE (KEITH LAKE - Richardson Backcountry) FALL WALLEYE INDEX NETTING SURVEY, Fisheries Management Waterways-Lac La Biche Area
UNNAMED LAKE (KEITH LAKE - Richardson Backcountry) FALL WALLEYE INDEX NETTING SURVEY, 2010 Fisheries Management Waterways-Lac La Biche Area February 28, 2013 Fisheries Biologist: Rebecca Baldwin, Fisheries
More informationKluane National Park and Reserve Hydroacoustic Survey Report
Kluane National Park and Reserve Hydroacoustic Survey Report Report to Parks Canada, Yukon Field Unit Prepared by: Peter Hall 1, Steven MacLellan 2, and Jeremy Hume 2 March 30 2006 1 Gitksan Watershed
More informationJIMAR PFRP ANNUAL REPORT FOR FY 2006
JIMAR PFRP ANNUAL REPORT FOR FY 2006 P.I./Sponsor Name: Michael P. Seki and Jeffrey J. Polovina Project Proposal Title: Oceanographic Characterization of the American Samoa Longline Fishing Grounds for
More informationCORRELATION BETWEEN SONAR ECHOES AND SEA BOTTOM TOPOGRAPHY
CORRELATION BETWEEN SONAR ECHOES AND SEA BOTTOM TOPOGRAPHY JON WEGGE Norwegian Defence Research Establishment (FFI), PO Box 115, NO-3191 Horten, Norway E-mail: jon.wegge@ffi.no False alarms resulting from
More informationExecutive Summary Gantahaz Lake 2006
Executive Summary Gantahaz Lake 2006 A stocking assessment was conducted at Gantahaz Lake on September 29, 2006. This was the third assessment completed since the inception of stocking in 1976. The management
More informationHYDROACOUSTIC METHODS TO ESTIMATE STREAM TROUT ABUNDANCE IN MINNESOTA LAKES 1
Minnesota Department of Natural Resources Investigational Report 534, 2006 HYDROACOUSTIC METHODS TO ESTIMATE STREAM TROUT ABUNDANCE IN MINNESOTA LAKES 1 Tracy L. Close Dan Yule 2 Gary D. Siesennop Minnesota
More informationAppendix E Fisheries and Marine Life Interaction Monitoring Plans Annual Report, March 2013
Appendix E Fisheries and Marine Life Interaction Monitoring Plans Annual Report, March 013 Fisheries and Marine Life Interaction Monitoring Plans Annual Report March 013 University of Maine, School of
More informationTARGET STRENGTH MEASUREMENTS OF GILTHEAD SEA BREAM WITH SINGLE-BEAM QUANTITATIVE ECHOSOUNDER
TARGET STRENGTH MEASUREMENTS OF GILTHEAD SEA BREAM WITH SINGLE-BEAM QUANTITATIVE ECHOSOUNDER Susana Llorens 1, Ester Soliveres, Isabel Pérez-Arjona, Víctor Espinosa, Vicent Puig, Patricia Ordóñez Institut
More information19 INTERNATIONAL CONGRESS ON ACOUSTICS MADRID, 2 7 SEPTEMBER 2007
19 INTERNATIONAL CONGRESS ON ACOUSTICS MADRID, 2 7 SEPTEMBER 2007 INVESTIGATIONS ON THE STRUCTURE OF FISH STOCKS IN ATATURK DAM LAKE BY USING CLASSICAL AND ACOUSTICAL APPROACHES AKOGLU, Ekin; GUCU, Ali
More informationSTUDY PERFORMANCE REPORT
STUDY PERFORMANCE REPORT State: Michigan Project No.: F-81-R-3 Study No.: 491 Title: Evaluation of lake sturgeon Acipenser fulvescens populations in the St. Clair River and Lake St. Clair Period Covered:
More informationRelative Size Selectivity of Trap Nets for Eight Species of Fish'
North American Journal of Fisheries Management 2:33-37, 1982 Copyright by the American Fisheries Society 1982 Relative Size Selectivity of Trap Nets for Eight Species of Fish' PERCY W. LAARMAN AND JAMES
More informationBOTTOM MAPPING WITH EM1002 /EM300 /TOPAS Calibration of the Simrad EM300 and EM1002 Multibeam Echo Sounders in the Langryggene calibration area.
BOTTOM MAPPING WITH EM1002 /EM300 /TOPAS Calibration of the Simrad EM300 and EM1002 Multibeam Echo Sounders in the Langryggene calibration area. by Igor Kazantsev Haflidi Haflidason Asgeir Steinsland Introduction
More informationAppendix 4-1 Seasonal Acoustic Monitoring Study on Oahu Army Installations C. Pinzari USGS 2014
Hawaiian Hoary Bat Seasonal Acoustic Monitoring Study on Oahu Army Installations 2010-2014 Data prepared by C. Pinzari, for CSU, March 2014 Survey Goals Establish bat presence or absence on U.S. Army managed
More informationHigh Ping Rate Profile Water Mode 12
Application Note FSA-014 (October 2008) Revised October 2008 High Ping Rate Profile Water Mode 12 Introduction Water Mode 12 is the result of the continued evolution of the signal processing within our
More informationDetermination of fish size distributions and areal densities using broadband low-frequency measurements
ICES Journal of Marine Science, 3: 197 21. 1996 Determination of fish size distributions and areal densities using broadband low-frequency measurements Charles H. Thompson and Richard H. Love Thompson,
More informationUniversity of Miami Rosenstiel School of Marine and Atmospheric Science. Billfish Research Program
University of Miami Rosenstiel School of Marine and Atmospheric Science Billfish Research Program 2011-2013 UNIVERSITY OF MIAMI Billfish Science Laboratory: RESEARCH FOCUS Uses advanced remote sensing
More informationMonitoring the Moe Pond ecosystem and population estimates of largemouth bass (Micropterus salmoides) post unauthorized introduction
Monitoring the Moe Pond ecosystem and population estimates of largemouth bass (Micropterus salmoides) post unauthorized introduction Stephen G. Stowell 1 ABSTRACT A study of Moe Pond, located in Otsego
More informationObserving the behavioral response of herring exposed to mid-frequency sonar signals
Observing the behavioral response of herring exposed to mid-frequency sonar signals Handegard 1, Nils Olav and Doksaeter 1, Lise and Godoe 1, Olav Rune and Kvadsheim 2, Petter H. 1 Institute of Marine
More informationHabitat Use and Behavioral Monitoring of Hawaiian Monk Seals in Proximity to the Navy Hawaii Range Complex
Project Annual Report Habitat Use and Behavioral Monitoring of Hawaiian Monk Seals in Proximity to the Navy Hawaii Range Complex Report Period: July 2011 June 2012 Submitted by: Kenady Wilson, Scientist
More informationI. Monitoring and Adaptive Management Approach. Potential Effects, Monitoring Studies & Mitigation
I. Monitoring and Adaptive Management Approach Define the problem or management objective. Determine potential effects of the project on indicator species. Emphasis on examining potentially negative, rather
More informationApplication of in situ target-strength estimations in lakes: examples from rainbow-smelt surveys in Lakes Erie and Champlain
ICES Journal of Marine Science, 60: 500 507. 2003 doi:10.1016/s1054 3139(03)00046-8 Application of in situ target-strength estimations in lakes: examples from rainbow-smelt surveys in Lakes Erie and Champlain
More informationInvestigating Acoustic Anomalies in the Water Column. Alistair Robertshaw, Geohazards Specialist, BP Oceanology 2016
Investigating Acoustic Anomalies in the Water Column Alistair Robertshaw, Geohazards Specialist, BP Oceanology 2016 Overview Water Column Data First Impressions Basic Theory Reflection Geometries Examples
More informationLake Monitoring Program: Lesser Slave Lake Stock Assessment
Lake Monitoring Program: Lesser Slave Lake Stock Assessment Greg Fortier, John Tchir 1 1 Alberta Conservation Association, Bag 9000-26, Peace River, Alberta, Canada T8S 1T4 Disclaimer: This document is
More informationCruise Report. Field Oceanography. Team 5, Leg 3
Cruise Report Field Oceanography Team 5, Leg 3 Submitted by: Lina Stolze Allison Kennedy Madlena Hukobyan Peter Hülse Date: October 27, 2008 1. Objectives The fieldwork was part of a field oceanography
More informationNEVADA DEPARTMENT OF WILDLIFE STATEWIDE FISHERIES MANAGEMENT
NEVADA DEPARTMENT OF WILDLIFE STATEWIDE FISHERIES MANAGEMENT FEDERAL AID JOB PROGRESS REPORTS F-2-49 213 RYE PATCH RESERVOIR WESTERN REGION NEVADA DEPARTMENT OF WILDLIFE, FISHERIES DIVISION ANNUAL PROGRESS
More informationMETHODS PAPER: Downstream Bathymetry and BioBase Analyses of Substrate and Macrophytes
Mactaquac Aquatic Ecosystem Study Report Series 2015-006 METHODS PAPER: Downstream Bathymetry and BioBase Analyses of Substrate and Macrophytes Ben Wallace, Jae Ogilvie and Wendy Monk 17 February 2015
More informationSound scattering by hydrodynamic wakes of sea animals
ICES Journal of Marine Science, 53: 377 381. 1996 Sound scattering by hydrodynamic wakes of sea animals Dmitry A. Selivanovsky and Alexander B. Ezersky Selivanovsky, D. A. and Ezersky, A. B. 1996. Sound
More informationFisheries Survey of Saratoga Lake
Fisheries Survey of Saratoga Lake 7- Mark D. Cornwell Kevin Poole State University of New York College of Agriculture & Technology Department of Fisheries & Wildlife Cobleskill, NY ABSTRACT: This survey
More informationFall Walleye Index Netting at Jackson Lake, Alberta, 2010
, 2010 Fisheries Management Lac La Biche Senior Fisheries Biologist(s): Dwayne Latty, Cold Lake Data Summary and Report by: Eric Hegerat, Fisheries Technician, Lac La Biche; Rebecca Skarsen, Fisheries
More informationTESLIN LAKE 1997, 2003, 2009
LAKE TROUT POPULATION ASSESSMENT TESLIN LAKE 1997, 2003, 2009 Prepared by: Lars Jessup October 2011 LAKE TROUT POPULATION ASSESSMENT TESLIN LAKE 1997, 2003, 2009 Fish and Wildlife Branch TR-11-04 Acknowledgements
More informationATLANTIC STATES MARINE FISHERIES COMMISSION. Winter Flounder Abundance and Biomass Indices from State Fishery-Independent Surveys
ATLANTIC STATES MARINE FISHERIES COMMISSION Winter Flounder Abundance and Biomass Indices from State Fishery-Independent Surveys Technical Committee Report to the Winter Flounder Management Board February
More informationFall Walleye Index Netting at Sylvan Lake, Alberta, 2012
Fall Walleye Index Netting at Sylvan Lake, Fisheries Management Red Deer Area February 28, 213 Fall Walleye Index Netting at Sylvan Lake, Fisheries Biologist(s): Jason Cooper, Kelly Dick Fisheries Management,
More informationJadEco, 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 informationFisheries Surveys of Canadarago Lake, NY
Fisheries Surveys of Canadarago Lake, NY 1972-2014 Thomas E. Brooking James R. Jackson Lars G. Rudstam Anthony J. VanDeValk New York Federal Aid in Sport Fish Restoration Grants F-56-R, Job 1-2 and F-61-R,
More informationPeace River Water Use Plan. Monitoring Program Terms of Reference. GMSMON-1 Peace River Creel Survey
Peace River Water Use Plan Monitoring Program Terms of Reference GMSMON-1 Peace River Creel Survey April 10, 2008 Terms of Reference for the Peace River Water Use Plan Monitoring Program: Peace River Creel
More informationEffect of Ocean Conditions on the Cross-shelf Distribution of Walleye Pollock (Theragra chalcogramma) and Capelin (Mallotus villosus)
Effect of Ocean Conditions on the Cross-shelf Distribution of Walleye Pollock (Theragra chalcogramma) and Capelin (Mallotus villosus) Anne Hollowed, Chris Wilson, Phyllis Stabeno, and Libby Logerwell National
More informationFine-scale Focal DTAG Behavioral Study in the Gulf of Maine
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. Fine-scale Focal DTAG Behavioral Study in the Gulf of Maine Alessandro Bocconcelli Woods Hole Oceanographic Institution
More informationThe complexity of narrowband echo envelopes as a function of fish side-aspect angle
1066 The complexity of narrowband echo envelopes as a function of fish side-aspect angle Debby L. Burwen, Patrick A. Nealson, Steven J. Fleischman, Timothy J. Mulligan, and John K. Horne Burwen, D. L.,
More informationSIO 210 MIDTERM, 26 October 2009.
SIO 210 MIDTERM, 26 October 2009. Please mark your answers on the attached answer sheet, and turn in ONLY THE ANSWER SHEET. Donʼt forget to put your name on the answer sheet!! Here are some constants,
More informationNEVADA 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 informationAlewife Brook, Cape Elizabeth, River Herring Monitoring Summary 2015
University of Southern Maine USM Digital Commons Publications Casco Bay Estuary Partnership (CBEP) 2-3-2016 Alewife Brook, Cape Elizabeth, River Herring Monitoring Summary 2015 Matt Craig University of
More informationData Collection and Processing: Elwha Estuary Survey, February 2013
Data Collection and Processing: Elwha Estuary Survey, February 2013 Ian Miller, WA Sea Grant Olympic Peninsula Field Office, 1502 E. Lauridsen Blvd #82, Port Angeles, WA 98362 immiller@u.washington.edu
More informationDauphin Lake Fishery. Status of Walleye Stocks and Conservation Measures
Dauphin Lake Fishery Status of Walleye Stocks and Conservation Measures Date: December, 21 Dauphin Lake Fishery Status of Walleye Stocks and Conservation Measures Background: Walleye stocks in Dauphin
More informationTutorial for the. Total Vertical Uncertainty Analysis Tool in NaviModel3
Tutorial for the Total Vertical Uncertainty Analysis Tool in NaviModel3 May, 2011 1. Introduction The Total Vertical Uncertainty Analysis Tool in NaviModel3 has been designed to facilitate a determination
More informationExecutive Summary Tebbutt Lake 2006
Executive Summary Tebbutt Lake 2006 A stocking assessment was conducted at Tebbutt Lake on June 16, 2006. This was the first assessment completed since the inception of stocking in 1993. The management
More informationExecutive Summary Mount Milligan 2004
Executive Mount Milligan 2004 Mt. Milligan Lake is a shallow and productive, 24 ha, marl bottomed lake situated 110 km southwest of Mackenzie. A stocking assessment was conducted at Mt. Milligan Lake between
More informationAppendix F: Ecology F-6 Methodology for Estimating Potential Hydroacoustic Impacts to Abundant Hudson River Fish Species and Shortnose Sturgeon from
Appendix F: Ecology F-6 Methodology for Estimating Potential Hydroacoustic Impacts to Abundant Hudson River Fish Species and Shortnose Sturgeon from Pile-driving Activities during Construction of the Tappan
More informationSurvey of veliger and adult zebra mussels (Dreissena polymorpha) in Goodyear Lake
Survey of veliger and adult zebra mussels (Dreissena polymorpha) in Goodyear Lake Samantha Armstrong 1 ABSTRACT Zebra mussels, Dreissena polymorpha, which cause numerous ecological and economical damages,
More informationSmall Footprint Topo-Bathymetric LiDAR
May 8, 2013 Small Footprint Topo-Bathymetric LiDAR PNAMP Remote Sensing Forum Russ Faux, Co-CEO, WSI Amar Nayegandhi, Manager of Elevation Technologies, Dewberry Colin Cooper, Senior Analyst, WSI Watershed
More informationExamples of Carter Corrected DBDB-V Applied to Acoustic Propagation Modeling
Naval Research Laboratory Stennis Space Center, MS 39529-5004 NRL/MR/7182--08-9100 Examples of Carter Corrected DBDB-V Applied to Acoustic Propagation Modeling J. Paquin Fabre Acoustic Simulation, Measurements,
More informationand found that there exist a significant overlap between the billfish resources and the exploitation activities targeting tunas and mahi mahi.
Executive Summary Report 2016 Billfish Research in the Eastern Pacific Ocean Rosenstiel School of Marine and Atmospheric Science University of Miami January 2017 During 2016, the Eastern Pacific Ocean
More informationCurrent Status and Management Recommendations for the Fishery in the Cloverleaf Chain of Lakes
Current Status and Management Recommendations for the Fishery in the Cloverleaf Chain of Lakes Jason Breeggemann Senior Fisheries Biologist Wisconsin Department of Natural Resources Outline DNR fisheries
More informationExecutive Summary Opatcho Lake 2004
Executive Summary Opatcho Lake 2004 Stocking assessments were conducted at Opatcho Lake on two separate occasions: May 20, 2004, and September 27, 2004. Opatcho Lake is a 40.5 ha lake situated 48 km southeast
More informationCan trawling effort be identified from satellite-based VMS data?
Not to be cited without prior reference to the author International Council for the Exploration of the Seas Theme session N: Technologies for monitoring fishing activities and observing catch Can trawling
More informationFall Walleye Index Netting at Battle Lake, Alberta, 2012
Fall Walleye Index Netting at Battle Lake, Fisheries Management Red Deer Area February 28, 213 Fall Walleye Index Netting at Battle Lake, Fisheries Biologist(s): Jason Cooper, Kelly Dick Fisheries Management,
More informationCrooked Lake Oakland County (T4N, R9E, Sections 3, 4, 9) Surveyed May James T. Francis
Michigan Department of Natural Resources Status of the Fishery Resource Report No. 2004-1, 2004 Crooked Lake Oakland County (T4N, R9E, Sections 3, 4, 9) Surveyed May 2002 James T. Francis Environment Crooked
More informationThe 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 informationQuantifying Fish Backscattering using SONAR Instrument and Kirchhoff Ray Mode (KRM) Model
Journal of Physics: Conference Series PAPER OPEN ACCESS Quantifying Fish Backscattering using SONAR Instrument and Kirchhoff Ray Mode (KRM) Model To cite this article: Henry M. Manik 2016 J. Phys.: Conf.
More informationSontek RiverSurveyor Test Plan Prepared by David S. Mueller, OSW February 20, 2004
Sontek RiverSurveyor Test Plan Prepared by David S. Mueller, OSW February 20, 2004 INTRODUCTION Sontek/YSI has introduced new firmware and software for their RiverSurveyor product line. Firmware changes
More informationAppendix 5: Currents in Minas Basin. (Oceans Ltd. 2009)
Appendix 5: Currents in Minas Basin (Oceans Ltd. 29) Current in Minas Basin May 1, 28 March 29, 29 Submitted To: Minas Basin Pulp and Power P.O. Box 41 53 Prince Street Hansport, NS, BP 1P by 22, Purdy
More informationPelagic fishery for Sebastes mentella in the Irminger Sea
3.2.6.d Pelagic fishery for Sebastes mentella in the Irminger Sea The stock structure of deep-sea redfish S. mentella in Sub-area XII, Division Va and Sub-area XIV and NAFO Div. 1F remains generally uncertain.
More information3.4.3 Advice June Barents Sea and Norwegian Sea Cod in Subareas I and II (Norwegian coastal waters cod)
3.4.3 Advice June 2013 ECOREGION STOCK Barents Sea and Norwegian Sea Cod in Subareas I and II (Norwegian coastal waters cod) Advice for 2014 ICES advises on the basis of the Norwegian rebuilding plan,
More informationReport of the Lake Erie Forage Task Group. March 2017
Report of the Lake Erie Forage Task Group March 2017 Members: Zy Biesinger Geoff Steinhart Mark Clapsadl John Deller Andrew Briggs Jan-Michael Hessenauer Mike Hosack Patrick Kočovský Tom MacDougall Jim
More informationExecutive Summary Crystal Lake 2004
Executive Summary Crystal Lake 2004 A stocking assessment was conducted on Crystal Lake during the fall of 2004. Both a sinking and a floating gillnet (90 m, standard mesh) were set on September 14, 2004.
More informationLAKE TROUT POPULATION ASSESSMENT SEKULMUN LAKE Prepared by: Lars Jessup and Nathan Millar
LAKE TROUT POPULATION ASSESSMENT SEKULMUN LAKE 2010 Prepared by: Lars Jessup and Nathan Millar LAKE TROUT POPULATION ASSESSMENT SEKULMUN LAKE 2010 Yukon Department of Environment Fish and Wildlife Branch
More informationBEFORE YOU OPEN ANY FILES:
Dive Analysis Lab *If you are using a school computer bring a USB drive to class to save your work and the files for the lab. *If you are using your own computer, make sure to download the data and files
More informationFish Use of Canals as Dry-Season Refuges in a Seasonally-Variable Freshwater Wetland
Fish Use of Canals as Dry-Season Refuges in a Seasonally-Variable Freshwater Wetland Ann C. Hijuelos and Joel Trexler Department of Biological Sciences Florida International University Miami, FL How might
More information2016 ANNUAL FISH TRAWL SURVEY REPORT
216 ANNUAL FISH TRAWL SURVEY REPORT The University of Rhode Island Graduate School of Oceanography The Graduate School of Oceanography (GSO) Fish trawl survey began weekly sampling two stations in Narragansett
More information