Comparative Analysis of Commercial Feeds for Brook Trout Fingerlings. James Barron

Size: px
Start display at page:

Download "Comparative Analysis of Commercial Feeds for Brook Trout Fingerlings. James Barron"

Transcription

1 Comparative Analysis of Commercial Feeds for Brook Trout Fingerlings. James Barron Abstract Lake Superior strain brook trout were put into 3 different tanks. Each tank was fed a different feed for a 6 week period to determine which feed provides optimal growth and health of the fish without compromising water quality. Each feed is different in protein and fat content as well as cost. The three feeds used in the experiment were Silver Cup Salmon diet, Silver Cup Steelhead diet and Purina Aquamax. The Silver Cup Salmon diet provided the highest weight gain in the trout. Silver Cup Steelhead diet provided the highest length gain in the trout but only by a slight amount more than the Silver Cup Salmon diet. Purina Aquamax was found to result in lower nitrates and ammonia in the effluent water than the other diets. Introduction When raising brook trout there are several feed options to choose from at any given stage of their growth. Feed cost is an important factor when selecting a feed; however it may be out weighed by nutritional value to the fish and the resulting growth rates. A trout farmer should make an educated decision as to what feed to use based on price, protein and fat content. Fat and protein are essential for fish growth so it may seem advantageous to have the highest levels of fat and protein possible in a feed as weight gain is considered to be the most important indicator of marketability (Royes 2005). When looking at growth it is important to consider not only how long the fish are getting but also how robust they are and this is often characterized by condition factor; defined as the nutritional state or well-being of an individual fish (Henne 2006). However, the drawbacks to high fat, high protein diets often include increased cost and increased water fouling by nitrogenous waste (Royes 2005). The goal of this study was to determine the benefits of some of the available commercial feeds when raising coaster brook trout by examining growth, water quality, and feed costs. The three diets compared were Silver Cup Salmon diet, Silver Cup Steelhead diet and Purina Aquamax Starter Fingerling 300 diet.

2 Methods Three 4 x 1 foot circular fiberglass tank inserts were used for the experiment. Each tank has a 100 gallon capacity. Foam insulation was siliconed into the square drain opening on the tanks. A 2 PVC stand pipe rose up 5.5 through the middle of the foam insulation in each tank and silicone was put around it to seal it, this pipe acted as the stand pipe. A plastic mesh was attached to the stand pipe to prevent fish from escaping. Each tank holds approximately 50 gallons of water when filled to the stand pipe and is a flow through design. Fresh water is delivered through an inlet drilled in the 1 PVC down pipes, with a flow control valve for each tank. Tanks were set at equal flow rates at a level comfortable for the fish. Each tank was fitted with a cover made from foam insulation that covered the entire tank to prevent excessive light exposure, with an opening cut in the foam top for the belt feeders. 100 Lake Superior strain brook trout were weighed and measured initially and put into each tank. These fish averaged 73 mm in length and 3.6 g in weight at the beginning of the experiment. They were being fed Silver Cup Salmon 1.0 mm before the experiment began. Tank 1 was fed Silver Cup Salmon diet 1mm until day 10 of the experiment when the Silver Cup Steelhead 1.5mm arrived, from day 10 on they were fed Silver Cup Steelhead 1.5 mm. Tank 2 was fed Silver Cup Salmon diet 1.0 mm initially then on day 16 of the experiment Silver Cup Salmon 2.0 mm was mixed with the 1.0 mm at a ratio of 1:1 by volume to make feed sizes more equal and appropriate for the fish. Tank 3 was fed Purina Aquamax Starter Fingerling 300 for the duration of the experiment. Protein and fat contents of the diets can be found in Table 1. The fish were all fed at 5% of their total body weight per day. For the first week of the experiment the fish were hand fed throughout the day, but were put on belt feeders after a week and fed continuously during the day for approximately 8 hours. Small squares of Styrofoam were floated and suspended at a slight angle under the belt feeders to help distribute the feed across the water s surface, as the fry seemed to prefer feeding from the surface and appeared to consume more of their food when fed this way. The tanks were cleaned by siphoning each morning and each night after all of their feed had been fed for the day. Sample counts of 20 fish were taken weekly from each tank and feed adjustments were

3 made weekly. The fish were always fasted before the sample counts. Daily water monitoring (Table 4) included temperature, dissolved oxygen, total dissolved gasses and ph. Gas and temperature levels were monitored using the Total Dissolved Gas Monitor produced by Common Sensing Inc model # TBO-DL6F. ph was read using a Pinpoint ph probe by American Marine Inc. Nitrate and ammonia levels of the effluents from each tank were measured twice during the experiment at mid-day or approximately 3 hours after the previous feeding (Table 3). Incoming water was also tested for nitrates and ammonia to find a baseline value using a Hach test kit model CEL 850. The scale used for sample counts and weighing daily rations was the Accu-weight by Yamato model# PPC-200W. The Belt feeders that were used were made by Ziegler Brothers Inc. Length and average mass (weight) were analyzed using linear regression analysis by date with the correlation coefficient (R 2 ) and equation for the regression line indicated for each feed type. Water quality data (temperature, ph, dissolved oxygen, and total dissolved gases) were reported daily and condition factor (CF = W/L 3 ) was reported for each weekly sample. Results The fish fed Silver Cup Salmon diet yielded the highest weight gain (Figure 1) and the highest growth rate by weight. Purina Aquamax yielded the lowest total weight gain; however, the lowest growth rate by weight was seen in the trout fed Silver Cup Steelhead diet. Silver Cup Steelhead diet yielded the highest gain in length (Figure 2) and growth rate by length however it performed only slightly better in respect to length than the Silver Cup Salmon diet. Purina Aquamax had the lowest gain in total length and the lowest growth rate by length (Table 2). Linear regression analysis of both length and weight showed significant increases in length (p < 0.001, F = , df = 5, R 2 = ) and weight (p < 0.001, F = , df = 5, R 2 = ) for brook trout fed the Silver Cup Steelhead diet. Significant increases in length (p < 0.001, F = , df = 5, R 2 = ) and weight (p < 0.001, F = 80.97, df = 5, R 2 = ) were also seen in brook trout fed Silver Cup Salmon diet and in length (p < 0.001, F = , df = 5, R 2 = ) and weight (p < 0.001, F = 95.43, df = 5, R 2 = ) for brook trout fed Purina Aquamax.

4 For effluent ammonia levels, the tank fed Silver Cup Salmon had the highest levels on both dates of testing. Silver Cup Steelhead and Purina Aquamax both had equally low ammonia readings (Table 3). Effluent nitrates were highest for the Silver Cup Salmon diet on the first date, but highest for Silver Cup Steelhead on the second date. Purina Aquamax had the lowest nitrites on both dates (Table 3). Condition factor ranged from 9.326E-06 to 9.933E-06 for the Silver Cup Steelhead diet. From 9.005E-06 to 1.059E-05 for the Silver Cup Salmon diet and from 8.823E-06 to 1.024E-05 for Purina Aquamax (Table 4). Temperature Ranged from (C) in the Silver Cup Steelhead tank (Table 5). In the Silver Cup Salmon tank temperature ranged from o C. In the Purina Aquamax tank the temperature ranged from o C. In the Silver Cup Steelhead tank Ph ranged from 7.82 to In the Silver Cup Salmon tank ph ranged from In the Purina Aquamax tank ph ranged from In the Silver Cup Steelhead tank dissolved oxygen ranged from ppm. In the Silver Cup Salmon tank dissolved oxygen ranged from ppm. In the Purina Aquamax tank dissolved oxygen ranged from ppm. For total dissolved gas pressure in the Silver Cup Steelhead tank a range of mmhg was observed. For the Silver Cup Salmon tank total dissolved gas pressure ranged mmhg. For the Purina Aquamax tank total dissolved gasses ranged from mmhg (Table 5). There were no mortalities during the experiment. Discussion Each of the three feeds had advantages and disadvantages. For growth, Silver Cup Salmon diet seemed to be the most effective. This is not surprising since the main difference in the Silver Cup Salmon diet is the higher fat content when compared to the other two feeds. While a high fat diet may lead to large gains in growth, these levels of fat in the food tend to produce more nitrogenous waste, and unless the system where the fish are housed is capable of lowering nitrites and ammonia to safe levels, fish stress and mortality could possible result. The Silver Cup Steelhead diet caused the fish to grow better in length than the other feeds. This cannot be due simply to levels of protein or fat, since the steelhead diet

5 has the lowest values of both compared to the other feeds unless it was the lower fat and protein content that lead to a more slender growth pattern. Perhaps a blend of the steelhead diet and the salmon diet would provide even better growth in respect to length and weight than either of the feeds alone. The Purina Aquamax diet did not produce better length gain than either of the two Silver Cup diets, but it did fair in respect to weight gain. This diet contained the highest composition of protein, but this did not seem to have any profound effect on promoting fish growth. The tank fed Purina Aquamax had the cleanest water in respect to nitrites and ammonia, but levels for ammonia were equal to that of the Silver Cup Steelhead tank, indicating a possible correlation between the lower fat content of these two diets to lower ammonia levels in the water. If water fouling issues are a concern Purina Aquamax may be a good choice. Purina Aquamax had the lowest price per pound, however I found feed costs can be highly variable dependant on the volume purchased. The results may also have been affected by the differences in the size of the feeds. Silver Cup Salmon was in 1 and 2 mm sizes, so I created a blend of the two sizes to try to make the feeds being compared as equal as possible. Silver Cup Steelhead was in 1.5mm. Purina Aquamax fingerling 300 was around 1.4mm. Fish size was appropriate based on the manufacturers recommendations for all of these feeds throughout the experiment. Factors not measured in this pilot study included flavor and palatability. Both factors could have influenced the feeding rate and growth of the fry and should be included in future studies. Another issue arose in the initial collection of these fish from their original tank. Some of the fish were collected, after being fasted for the morning. All of these fish were weighed and measured. The automated feeders on the tanks of origin then proceeded to go off during the collection, causing the remaining fish to have bellies full of food, thus causing their weight to be higher initially, which would have led to a more significant weight change in the fish that were fasting. To correct this issue, I omitted the all of the weights from the initial collection however the initial lengths were still relevant and thus included. Acknowledgements

6 I would like to thank the University of Wisconsin Stevens Point Northern Aquaculture Demonstration Facility (NADF) for providing me with the resources to run this experiment. I would like to thank Greg Fischer and all of the NADF employees who helped me design, set up and run this experiment. I would like to thank Dr. Chris Hartleb for his assistance and input on this project.

7 Table 1: Critical properties of the selected feeds. Feed Size Used Protein (%) Fat (%) Estimated Cost ($/lb) (mm) Silver Cup Steelhead diet Silver Cup Salmon diet 1 and Purina Aquamax Starter Fingerling Table 2: Changes in length and weight from the start of the experiment to the end. Tank Silver Cup Steelhead Silver Cup Salmon Purina Aquamax total weight gain (g) total % growth by weight total Length Gain (mm) total % Growth by length Table 3: Displays effluent and baseline readings from the experiment. Baseline values are the recorded values from the fresh water entering the systems. tank date Nitrite ppm Ammonia ppm Silver Cup Steelhead 7/26/ /15/ Silver Cup Salmon 7/26/ /15/ Purina 7/26/ /15/ Baseline Table 4: Weekly condition factor of the brook trout fry (the >CF the more weight per unit length). Date Silver Cup Steelhead Silver Cup Salmon Purina Aquamax July July August August August

8 Table 5: Water quality variables during the experiment. Date Temperature (C) ph Silver Silver Silver Cup Cup Purina Cup Steelhead Salmon Aquamax Steelhead Silver Cup Salmon Purina Aquamax DO (ppm) Silver Cup Steelhead Silver Cup Salmon Purina Aquamax TDGP (mmhg) Silver Silver Cup Cup Steelhead Salmon Purina Aquamax 10-Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Jul Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug Aug

9 Average Length(mm) Average Mass (g) y = x R 2 = y = x R 2 = y = x R 2 = /17/2006 7/22/2006 7/27/2006 8/1/2006 8/6/2006 8/11/2006 8/16/2006 8/21/2006 Date Silver Cup Steelhead Silver Cup Salmon Purina Figure 1: Changes in weight of the fry in each tank for the duration of the experiment (Data from the first sampling date were omitted since the fish were recently fed and fish weight was inflated) Silver Cup Steelhead Silver Cup Salmon y = x R 2 = y = x R 2 = y = x R 2 = /7/2006 7/12/2006 7/17/2006 7/22/2006 7/27/2006 8/1/2006 8/6/2006 8/11/2006 8/16/2006 8/21/2006 Date Purina Figure 2: Changes in length during the experiment.

10 Works Cited Henne J. P., et al Performance of Endangered Bonytails Fed Four Commercial Diets. North American Journal of Aquaculture 68: Royes, J. A. B., D. J. Murie Optimum Dietary Protein Level for Growth and Protein Efficiency without Hepatocyte Changes in Juvenile African Cichlids Pseudotropheus scolofi. North American Journal of Aquaculture 67:

Feeding Tilapia in Intensive Recirculating Systems

Feeding Tilapia in Intensive Recirculating Systems NCRAC Extension Fact Sheets North Central Regional Aquaculture Center 8-2003 Feeding Tilapia in Intensive Recirculating Systems Marty Riche United States Department of Agriculture Donald Garling Michigan

More information

Winter Culture of Caged Rainbow Trout in the South.

Winter Culture of Caged Rainbow Trout in the South. Winter Culture of Caged Rainbow Trout in the South. Forrest Wynne, State Extension Specialist for Aquaculture, Kentucky State University Cooperative Extension Program, Graves County Extension Office, 251

More information

Winter Culture of Caged Rainbow Trout in the South.

Winter Culture of Caged Rainbow Trout in the South. Winter Culture of Caged Rainbow Trout in the South. Forrest Wynne, Aquaculture Extension Specialist, Kentucky State University Cooperative Extension Program, Graves County Cooperative Extension Service

More information

Northern Aquaculture Demonstration Facility 2014 Walleye Project

Northern Aquaculture Demonstration Facility 2014 Walleye Project Northern Aquaculture Demonstration Facility 2014 Walleye Project Investigators: Gregory J. Fischer, Facilities Operations Manager Kendall Holmes, Advanced Facility Technician Introduction From May through

More information

CHANNEL CATFISH CULTURE IN THE UNITED STATES. Leonard Lovshin Department of Fisheries and Allied Aquacultures Auburn University, AL 36849

CHANNEL CATFISH CULTURE IN THE UNITED STATES. Leonard Lovshin Department of Fisheries and Allied Aquacultures Auburn University, AL 36849 CHANNEL CATFISH CULTURE IN THE UNITED STATES BY Leonard Lovshin Department of Fisheries and Allied Aquacultures Auburn University, AL 36849 Channel Catfish ( Ictalurus punctatus ) Native Range Of Channel

More information

Sunfish / Bluegill Fillets - 5 lbs Price: $87.00 Skin on Fillets - Individually Frozen 2012 source: internet

Sunfish / Bluegill Fillets - 5 lbs Price: $87.00 Skin on Fillets - Individually Frozen 2012 source: internet Bluegill Production Sunfish / Bluegill Fillets - 5 lbs Price: $87.00 Skin on Fillets - Individually Frozen 2012 source: internet CHUCK HICKS PRINCIPLE INVESTIGATOR LINCOLN UNIVERSITY AQUACULTURE PROGRAM

More information

Economic Modeling of Walleye and Hybrid Walleye Production Protocols

Economic Modeling of Walleye and Hybrid Walleye Production Protocols Economic Modeling of Walleye and Hybrid Walleye Production Protocols James A. Held Jim Held Consulting LLC Sun Prairie, WI Introduction Aquaculturists are considering two economically significant markets

More information

Zweig-Pond Aquaponics

Zweig-Pond Aquaponics Zweig-Pond Aquaponics Growing Fish and Lettuce in Solar Ponds Earle Barnhart 2018 From 1971 to 1991 New Alchemy Institute researched growing edible fish on a household scale. The goal was to grow high-quality

More information

Intensive Production of Hybrid Walleye(Sander vitreus x S. canadense) in a Recycle Water System

Intensive Production of Hybrid Walleye(Sander vitreus x S. canadense) in a Recycle Water System Intensive Production of Hybrid Walleye(Sander vitreus x S. canadense) in a Recycle Water System Gregory Fischer, Facility Manager University of Wisconsin-Stevens Point Northern Aquaculture Demonstration

More information

Mirror Carp Fingerling to Market Production in Ponds in Harbin with Soy-Based Feeds

Mirror Carp Fingerling to Market Production in Ponds in Harbin with Soy-Based Feeds Mirror Carp Fingerling to Market Production in Ponds in Harbin with Soy-Based Feeds Results of ASA/China 2002 Feeding Trial 35-02-101 Michael C. Cremer, Zhang Jian and Zhou Enhua American Soybean Association

More information

Cultures of Fairy Shrimp (Streptocephalus sirindhornae) for Feeding Giant Freshwater Prawn (Macrobrachium rosenberbii)

Cultures of Fairy Shrimp (Streptocephalus sirindhornae) for Feeding Giant Freshwater Prawn (Macrobrachium rosenberbii) Available online http://www.ijat-aatsea.com ISSN 1686-9141 Cultures of Fairy Shrimp (Streptocephalus sirindhornae) for Feeding Giant Freshwater Prawn (Macrobrachium rosenberbii) Saengphan, N. 1*, Suksomnit,

More information

ACUTE TEMPERATURE TOLERANCE OF JUVENILE CHINOOK SALMON FROM THE MOKELUMNE RIVER

ACUTE TEMPERATURE TOLERANCE OF JUVENILE CHINOOK SALMON FROM THE MOKELUMNE RIVER ACUTE TEMPERATURE TOLERANCE OF JUVENILE CHINOOK SALMON FROM THE MOKELUMNE RIVER Charles H. Hanson, Ph.D. Hanson Environmental, Inc. SUMMARY A series of static acute tests were performed to determine the

More information

POLYCULTURE OF GRASS CARP AND NILE TILAPIA WITH NAPIER GRASS AS THE SOLE NUTRIENT INPUT IN THE SUBTROPICAL CLIMATE OF NEPAL

POLYCULTURE OF GRASS CARP AND NILE TILAPIA WITH NAPIER GRASS AS THE SOLE NUTRIENT INPUT IN THE SUBTROPICAL CLIMATE OF NEPAL POLYCULTURE OF GRASS CARP AND NILE TILAPIA WITH NAPIER GRASS AS THE SOLE NUTRIENT INPUT IN THE SUBTROPICAL CLIMATE OF NEPAL Narayan P. Pandit, Madhav K. Shrestha* (IAAS, Nepal) Yang Yi (AIT, Thailand)

More information

Compound Aqua feeds in a More Competitive Market: Alternative protein sources for a more sustainable future

Compound Aqua feeds in a More Competitive Market: Alternative protein sources for a more sustainable future Compound Aqua feeds in a More Competitive Market: Alternative protein sources for a more sustainable future Abstract Albert G.J. Tacon Aquatic Farms Ltd 49-139 Kamehameha Hwy Kaneohe, Hawaii 96744 USA

More information

Platte River State Fish Hatchery Summary of 2012 Production and Operational Activities

Platte River State Fish Hatchery Summary of 2012 Production and Operational Activities Platte River State Fish Hatchery Summary of 2012 Production and Operational Activities Antibiotic Use The antibiotic use at the Platte River State Fish Hatchery (Hatchery) in 2012 only focused on disease

More information

Production of Longnose Catfish (Leiocassis longirostris) Fingerlings in Beijing Using the ASA 80:20 Pond Model and Soymeal-Based Feeds

Production of Longnose Catfish (Leiocassis longirostris) Fingerlings in Beijing Using the ASA 80:20 Pond Model and Soymeal-Based Feeds Production of Longnose Catfish (Leiocassis longirostris) Fingerlings in Beijing Using the ASA 80:20 Pond Model and Soymeal-Based Feeds Results of ASA/China 2001 Feeding Trial 35-01-108 Michael C. Cremer,

More information

Pond Culture of Channel Catfish in the North Central Region

Pond Culture of Channel Catfish in the North Central Region North Central Regional Aquaculture Center In cooperation with USDA and the NCR Educational Materials Project USDA grant # 89-38500-4319 Pond Culture of Channel Catfish in the North Central Region by J.

More information

Trout Care Egg preparation & placement

Trout Care Egg preparation & placement Egg preparation & placement Provide darkness Light can harm eggs. Keep light exposure to less than 15 minutes. Insulation placed around the aquarium will not only keep out light, but will also keep aquarium

More information

Experiment 18 Properties of Gases

Experiment 18 Properties of Gases Experiment 18 Properties of Gases E18-1 E18-2 The Task In this experiment you will investigate some of the properties of gases, i.e. how gases flow, their phase changes and chemical reactivity. Skills

More information

University of Wisconsin-Stevens Point Northern Aquaculture Demonstration Facility State Hwy 13 P.O. Box 165, Bayfield, WI,

University of Wisconsin-Stevens Point Northern Aquaculture Demonstration Facility State Hwy 13 P.O. Box 165, Bayfield, WI, Extensive Walleye Production UWSP NADF Pond Culture 2017 Prepared By: Emma Wiermaa, Facility Outreach Specialist Greg Fischer, Facility Manager Kendall Holmes, Facility Foreman Introduction: Due to a collaboration

More information

Growout Techniques for the Pacific Threadfin Polydactylus sexfilis

Growout Techniques for the Pacific Threadfin Polydactylus sexfilis Page 1 Aquafarmer Information Sheet #14 Growout Techniques for the Pacific Threadfin Polydactylus sexfilis by Michael Chambers, Research Associate Jackie Zimmerman and Angelos Apeitos, Research Assistants

More information

Pangasius Catfish Production in Ponds with Soy-Based Feeds

Pangasius Catfish Production in Ponds with Soy-Based Feeds Pangasius Catfish Production in Ponds with Soy-Based Feeds Results of ASA/China 2002 Feeding Trial 35-02-116 Michael C. Cremer, Zhang Jian and Zhou Enhua American Soybean Association Room 902, China World

More information

Mirror Carp Fry to Fingerling Growth Performance in Ponds in Harbin with Soymeal-Based Feeds

Mirror Carp Fry to Fingerling Growth Performance in Ponds in Harbin with Soymeal-Based Feeds Mirror Carp Fry to Fingerling Growth Performance in Ponds in Harbin with Soymeal-Based Feeds Results of ASA/China 2001 Feeding Trial 35-01-104 Michael C. Cremer, Zhang Jian and Zhou Enhua American Soybean

More information

80:20 Pond Growth Performance of Hybrid Tilapia on Soybean Meal-Based Diets

80:20 Pond Growth Performance of Hybrid Tilapia on Soybean Meal-Based Diets 80:20 Pond Growth Performance of Hybrid Tilapia on Soybean Meal-Based Diets Results of 1997 ASA/China Feed-Based Production Trials INTRODUCTION M. C. Cremer and Zhang Jian American Soybean Association,

More information

Feeding the Broodmare

Feeding the Broodmare Reviewed August 2009 Agdex 460/50-6 Feeding the Broodmare Mares are expected to grow a healthy foal inside them for 11 months and produce enough milk for that foal for up to 6 months. Furthermore, many

More information

EFFECT OF FEEDING FREQUENCIES ON CARP GROWTH RATE PRELIMINARY RESULTS

EFFECT OF FEEDING FREQUENCIES ON CARP GROWTH RATE PRELIMINARY RESULTS 317 Bulgarian Journal of Agricultural Science, 16 (No 3) 2010, 317-321 Agricultural Academy EFFECT OF FEEDING FREQUENCIES ON CARP GROWTH RATE PRELIMINARY RESULTS M. STANKOVIC 1, Z. MARKOVIC 1, Z. DULIC

More information

Fish Cage Design. Handout 6.1a

Fish Cage Design. Handout 6.1a Fish Cage Design Handout 6.1a Fish cages or small net-pens can either be purchased from commercial dealers or made at home. Commercially made cage or net-pen systems are available in a wide range of sizes.

More information

Production of Red Sea Bream in 6.4-m 3 Cages In Coastal Waters in Quanzhou, China

Production of Red Sea Bream in 6.4-m 3 Cages In Coastal Waters in Quanzhou, China Production of Red Sea Bream in 6.4-m 3 Cages In Coastal Waters in Quanzhou, China Results of ASA/China 2004 Feeding Trial 35-04-101 Michael C. Cremer, Sean Lan and Zhang Jian American Soybean Association

More information

The activated sludge process

The activated sludge process The activated sludge process Most wastewater treatment plants are using the activated sludge process. The heart of such a process mainly consists of an aeration tank, a sedimentation tank or clarifier

More information

Egypt. J. Aquat. Biol. & Fish., Vol. 11, No.3:105 : 113 (2007) ISSN

Egypt. J. Aquat. Biol. & Fish., Vol. 11, No.3:105 : 113 (2007) ISSN Egypt. J. Aquat. Biol. & Fish., Vol. 11, No.3:105 : 113 (2007) ISSN 1110 6131 Efficiency of African Catfish Clarias gariepinus in controlling unwanted reproduction of Nile Tilapia Oreochromis niloticus

More information

UPGRADE KIT. Installs a new EAZY filter into Nexus 200 / 300 manufactured after 2006 and Nexus 210 / 310 manufactured after 2009

UPGRADE KIT. Installs a new EAZY filter into Nexus 200 / 300 manufactured after 2006 and Nexus 210 / 310 manufactured after 2009 EAZYUG220320161117MAN UK English UPGRADE KIT Installs a new EAZY filter into Nexus 200 / 300 manufactured after 2006 and Nexus 210 / 310 manufactured after 2009 IMPORTANT PLEASE READ: Your Nexus MUST be

More information

UW- STEVENS POINT NORTHERN AQUACULTURE DEMONSTRATION FACILITY

UW- STEVENS POINT NORTHERN AQUACULTURE DEMONSTRATION FACILITY UW- STEVENS POINT NORTHERN AQUACULTURE DEMONSTRATION FACILITY WALLEYE PROJECT- 2007 By Gregory J. Fischer, Facilities Manager Introduction From April through October, 2007, the UW Stevens Point Northern

More information

Injection Systems INSTALLATION AND OPERATING GUIDE HI FLO VERTICAL TANK SYSTEMS

Injection Systems INSTALLATION AND OPERATING GUIDE HI FLO VERTICAL TANK SYSTEMS TM INSTALLATION AND OPERATING GUIDE HI FLO VERTICAL TANK SYSTEMS When the HI-FLO Metering Head is attached to a tank, the tank will be pressurized to the same pressure as the irrigation system. Before

More information

Caged Fish. Feeding, sampling, observation, and the harvesting process are comparatively

Caged Fish. Feeding, sampling, observation, and the harvesting process are comparatively A L A B A M A A & M A N D A U B U R N U N I V E R S I T I E S ANR-957 Caged Fish Production In Alabama Aquaculture has expanded rapidly since the 1980s. Worldwide aquaculture accounts for more than 15

More information

AQUACULTURE PROGRESS AQUACULTURE TODAY MILESTONE 1: MINIMIZING ENVIRONMENTAL IMPACTS. Facts:

AQUACULTURE PROGRESS AQUACULTURE TODAY MILESTONE 1: MINIMIZING ENVIRONMENTAL IMPACTS. Facts: MILESTONE 1: MINIMIZING ENVIRONMENTAL IMPACTS Background: Like all other animals, as fish metabolize food they produce wastes soluble nitrogenous compounds and settable solids (feces). A priority has been

More information

From Phosphorus to Fish: Beneficial Use of Excess Nutrients

From Phosphorus to Fish: Beneficial Use of Excess Nutrients FLOATINGISLANDINTERNATIONAL From Phosphorus to Fish: Beneficial Use of Excess Nutrients Project Location: Shepherd, Montana Fishing can be the primary method for transitioning excess nonpoint source nutrients

More information

Application Worksheet

Application Worksheet Application Worksheet All dimensions are nominal. Dimensions in [ ] are in millimeters. Service Conditions Medium Through Valve: Required C v : Temperature Maximum: Minimum: Normal: Flow Maximum: Minimum:

More information

RECREATIONAL PONDS AND LAKES

RECREATIONAL PONDS AND LAKES RECREATIONAL PONDS AND LAKES POND ECOLOGY AQUATIC PLANTS & FISH F.S. Conte Department of Animal Science University of California Davis Photos By Flickr AQUATIC PLANTS POND HEALTH Chemical Recycling Oxygen

More information

Gregory Fischer, Facility Operations Manager. University of Wisconsin-Stevens Point Northern Aquaculture Demonstration Facility

Gregory Fischer, Facility Operations Manager. University of Wisconsin-Stevens Point Northern Aquaculture Demonstration Facility Production of Walleye (Sander vitreus) and Hybrid Walleye (S. vitreus x S. canadense) with Formulated Feed Utilizing Various Rearing Systems and Novel Technologies for Commercial Food Production Gregory

More information

2. Determine how the mass transfer rate is affected by gas flow rate and liquid flow rate.

2. Determine how the mass transfer rate is affected by gas flow rate and liquid flow rate. Goals for Gas Absorption Experiment: 1. Evaluate the performance of packed gas-liquid absorption tower. 2. Determine how the mass transfer rate is affected by gas flow rate and liquid flow rate. 3. Consider

More information

Largemouth Bass Production with a 30% Soybean Meal Inclusion Feed

Largemouth Bass Production with a 30% Soybean Meal Inclusion Feed Key Words: Largemouth bass, soybean meal, 80:20 pond technology, China Largemouth Bass Production with a 30% Soybean Meal Inclusion Feed Michael C. Cremer, Zhou Enhua and Zhang Jian ASA-IM/China Aquaculture

More information

Detector Carrier Gas Comments Detector anode purge or reference gas. Electron Capture Nitrogen Maximum sensitivity Nitrogen Argon/Methane

Detector Carrier Gas Comments Detector anode purge or reference gas. Electron Capture Nitrogen Maximum sensitivity Nitrogen Argon/Methane Gas requirements Gases for packed columns The carrier gas you use depends upon the type of detector and the performance requirements. Table 520-1 lists gas recommendations for packed column use. In general,

More information

Yellow Perch Broodstock. Geoff Wallat, Aquaculture Specialist

Yellow Perch Broodstock. Geoff Wallat, Aquaculture Specialist Yellow Perch Broodstock Geoff Wallat, Aquaculture Specialist Perch 101 Spawn once a year: Late March in So. Ohio Eggs produced in ribbon structure requires unique procedures for incubation and hatching

More information

Pressure Compensating (PC) Spray Stakes

Pressure Compensating (PC) Spray Stakes N E T A F I M U S A Pressure Compensating (PC) Spray Stakes Automated Watering Systems for Large Container Production Improve Plant Quality and Conserve Resources 1 or More Good Reasons to Choose Netafim

More information

Liquid Level Measurement

Liquid Level Measurement Technical Article Liquid Level Measurement A pressure transmitter can be used to determine the liquid level in a tank, well, river or other body of liquid. The pressure at the bottom of a liquid filled

More information

maintaining storage tank dissolved oxygen levels utilizing gas transfer membranes

maintaining storage tank dissolved oxygen levels utilizing gas transfer membranes Water Technologies & Solutions technical paper maintaining storage tank dissolved oxygen levels utilizing gas transfer membranes Authors: W.E. Haas, SUEZ, J. Helmrich, Florida Power and Light and J.E.

More information

Delayed Coker Safe Sampling Tar or Spalled Coke

Delayed Coker Safe Sampling Tar or Spalled Coke Delayed Coker Safe Sampling Tar or Spalled Coke Presented by Mitch Moloney of ExxonMobil mitchell.j.moloney@exxonmobil.com @ Galveston TX coking.com May-2013 a MJ Moloney - ExxonMobil May-2012 coking.com

More information

Introduction. Egg Incubators. A wide variety of systems can be used for incubating fish eggs and larvae.

Introduction. Egg Incubators. A wide variety of systems can be used for incubating fish eggs and larvae. Introduction Collecting Eggs and Larval rearing Once spawning is achieved, the resulting eggs and larvae must be incubated In general, collecting eggs and larvae will be more efficient and yield better

More information

Accu-Tab Systems 2000 P Series by Axiall Corporation

Accu-Tab Systems 2000 P Series by Axiall Corporation Accu-Tab Systems 2000 P Series by Axiall Corporation Installation and Operating Instructions Models 2075 P 2150 P For NSF/ANSI-Standard 61 NSF STANDARD 61 applications use NSF/ANSI Standard 60 listed Axiall

More information

STOCKING RATIOS OF HYBRID CATFISH (Clarias macrocephalus x C. Gariepinus) AND NILE TILAPIA (Oreochromis niloticus) IN INTENSIVE POLYCULTURE SYSTEM

STOCKING RATIOS OF HYBRID CATFISH (Clarias macrocephalus x C. Gariepinus) AND NILE TILAPIA (Oreochromis niloticus) IN INTENSIVE POLYCULTURE SYSTEM STOCKING RATIOS OF HYBRID CATFISH (Clarias macrocephalus x C. Gariepinus) AND NILE TILAPIA (Oreochromis niloticus) IN INTENSIVE POLYCULTURE SYSTEM NGUYEN THANH LONG 1 and YANG YI 2 1 College of Aquaculture

More information

GROWTH PERFORMANCE OF NILE TILAPIA (Oreochromis niloticus L.) SUBJECTED TO DELAYED STOCKING AND FEEDING

GROWTH PERFORMANCE OF NILE TILAPIA (Oreochromis niloticus L.) SUBJECTED TO DELAYED STOCKING AND FEEDING GROWTH PERFORMANCE OF NILE TILAPIA (Oreochromis niloticus L.) SUBJECTED TO DELAYED STOCKING AND FEEDING Jose S. Abucay, Herle Mae T. Balderama and Eduardo A. Lopez College of Fisheries and Freshwater Aquaculture

More information

Sanitizers. Sanitizers. Sanitizers for Pools & Spas

Sanitizers. Sanitizers. Sanitizers for Pools & Spas for Pools & Spas 207 IntelliChlor Salt Chlorinator Featured Highlights IntelliChlor Salt Chlorinator IntelliChlor Salt Chlorinator uses common table salt to produce all the chlorine a pool needs, safely,

More information

LINEAR TRANSFORMATION APPLIED TO THE CALIBRATION OF ANALYTES IN VARIOUS MATRICES USING A TOTAL HYDROCARBON (THC) ANALYZER

LINEAR TRANSFORMATION APPLIED TO THE CALIBRATION OF ANALYTES IN VARIOUS MATRICES USING A TOTAL HYDROCARBON (THC) ANALYZER LINEAR TRANSFORMATION APPLIED TO THE CALIBRATION OF ANALYTES IN VARIOUS MATRICES USING A TOTAL HYDROCARBON (THC) ANALYZER Michael T Tang, Ph.D. Grace Feng Greg Merideth Rui Huang Matheson Gas Applied Lab

More information

Air Amplifiers & SYSTEMS

Air Amplifiers & SYSTEMS Air Amplifiers & SYSTEMS We Accept VISA, MasterCard and American Express Air Amplifiers Point-of-Use Air Solutions Maximator air amplifiers are designed to boost plant air pressure or increase the supply

More information

Manual of Fisheries Survey Methods II: with periodic updates. Chapter 22: Guidelines for Sampling Warmwater Rivers with Rotenone

Manual of Fisheries Survey Methods II: with periodic updates. Chapter 22: Guidelines for Sampling Warmwater Rivers with Rotenone Manual of Fisheries Survey Methods II: with periodic updates : Guidelines for Sampling Warmwater Rivers with Rotenone P. W. Seelbach, G. L. Towns, and D. D. Nelson Suggested citation: Seelbach, Paul W.,

More information

Aquaculture Technology - PBBT301 UNIT I - MARINE ANIMALS IN AQUACULTURE

Aquaculture Technology - PBBT301 UNIT I - MARINE ANIMALS IN AQUACULTURE Aquaculture Technology - PBBT301 UNIT I - MARINE ANIMALS IN AQUACULTURE PART A 1. Define aquaculture. 2. Write two objectives of aquaculture? 3. List the types of aquaculture. 4. What is monoculture? 5.

More information

Accu-Tab Systems 1000 Series by Axiall Corporation

Accu-Tab Systems 1000 Series by Axiall Corporation Accu-Tab Systems 1000 Series by Axiall Corporation Installation and Operating Instructions Model 1050 DANGER: DO NOT MIX CHEMICALS! The Accu-Tab chlorinator is designed for use with Axiall approved tablets

More information

Sanitizers. Sanitizers. Sanitizers for Pools & Spas

Sanitizers. Sanitizers. Sanitizers for Pools & Spas Sanitizers Sanitizers for Pools & Spas 213 213 IntelliChlor Salt Chlorinator Featured Highlights IntelliChlor Salt Chlorinator IntelliChlor Salt Chlorinator uses common table salt to produce all the chlorine

More information

Harvesting Ornamental Fish From Ponds 1

Harvesting Ornamental Fish From Ponds 1 FA-117 Harvesting Ornamental Fish From Ponds 1 Tina C. Crosby, Jeffrey E. Hill, Carlos V. Martinez, Craig A. Watson, Deborah B. Pouder, and Roy P.E. Yanong 2 Introduction Throughout Florida, ornamental

More information

GROWTH CHARACTERISTICS OF TWO TILAPIA SPECIES (O. aureas and O. hornorum)

GROWTH CHARACTERISTICS OF TWO TILAPIA SPECIES (O. aureas and O. hornorum) GROWTH CHARACTERISTICS OF TWO TILAPIA SPECIES (O. aureas and O. hornorum) Bica Tran Bradley Fox, Clyde Tamaru, and Yong soo Kim CTAHR, University of Hawaii, Manoa Content Background Research approach Current

More information

The Helium Leak Detector

The Helium Leak Detector The Helium Leak Detector Helium Leak Detector Main Components The main components of a helium leak detector are: 1. The analyzed, which enables to separate the tracer gas from other gases inside leak detector.

More information

COMPARATIVE INVESTIGATIONS ON THE NUTRITIVE VALUE OF CARP FISH MEAT (CYPRINIDAE), GROWN AT ORGANIC AQUACULTURE CONDITIONS

COMPARATIVE INVESTIGATIONS ON THE NUTRITIVE VALUE OF CARP FISH MEAT (CYPRINIDAE), GROWN AT ORGANIC AQUACULTURE CONDITIONS 127 Bulgarian Journal of Agricultural Science, 14 (No 2) 2008, 127-132 National Centre for Agrarian Sciences COMPARATIVE INVESTIGATIONS ON THE NUTRITIVE VALUE OF CARP FISH MEAT (CYPRINIDAE), GROWN AT ORGANIC

More information

SLO: Students will be able to plan and design, plus possibly build and trial, a net pen suitable for the Marlborough Sounds to farm King salmon.

SLO: Students will be able to plan and design, plus possibly build and trial, a net pen suitable for the Marlborough Sounds to farm King salmon. LEVEL Design a net pen 3-5 SLO: Students will be able to plan and design, plus possibly build and trial, a net pen suitable for the Marlborough Sounds to farm King salmon. INTRODUCTION: Net pens are a

More information

Postlarval holding and nursery phases

Postlarval holding and nursery phases 5 CHAPTER Postlarval holding and nursery phases 5.1 Basic requirements and facilities The selection of sites for indoor nurseries should follow the same pattern as for hatcheries. Site selection for outdoor

More information

Liquid Thin Film Technology

Liquid Thin Film Technology Liquid Thin Film Technology New innovative way of enabling gas transfer in/out of liquid with extremely high power efficiency US Patent No. US 8,292,271 B2 and US 7,494,534 B2 3/15/2015 Riverforest Corporation

More information

INITIATION OF FEEDING DURING HATCHERY REARING OF LANDLOCKED FALL CHINOOK SALMON FRY

INITIATION OF FEEDING DURING HATCHERY REARING OF LANDLOCKED FALL CHINOOK SALMON FRY Proceedings of the South Dakota Academy of Science, Vol. 81 (2002) 137 INITIATION OF FEEDING DURING HATCHERY REARING OF LANDLOCKED FALL CHINOOK SALMON FRY Michael E. Barnes, William A. Sayler, and Rick

More information

Chlorinator MODEL MK-I

Chlorinator MODEL MK-I Chlorinator MODEL MK-I The New model MK- I is semi automatic gas type. Vacuum operated Solution feed Chlorinator designed to provide a continues & measured quantity of gas while in operation. It is suitable

More information

Membrane modules for nitrogen and oxygen generator systems. Technology Overview ENGINEERING YOUR SUCCESS.

Membrane modules for nitrogen and oxygen generator systems. Technology Overview ENGINEERING YOUR SUCCESS. Membrane modules for nitrogen and oxygen generator systems Technology Overview ENGINEERING YOUR SUCCESS. Parker modules the heart of OEM tailor-made nitrogen generators OEM (Original Equipment Manufacturer)

More information

SERVICE BULLETIN This service bulletin is for Accu-Tab Blue Calcium Hypochlorite Tablets (EPA Reg. No )

SERVICE BULLETIN This service bulletin is for Accu-Tab Blue Calcium Hypochlorite Tablets (EPA Reg. No ) SERVICE BULLETIN This service bulletin is for () SWIMMING POOL USE It is a violation of Federal law to use this product in a manner inconsistent with its labeling. This calcium hypochlorite product in

More information

Getting ahead in a cutthroat world Optimizing culture conditions for Snake River, Colorado River and Yellowstone cutthroat trout

Getting ahead in a cutthroat world Optimizing culture conditions for Snake River, Colorado River and Yellowstone cutthroat trout Getting ahead in a cutthroat world Optimizing culture conditions for Snake River, Colorado River and Yellowstone cutthroat trout Christopher Myrick & Mandi Brandt Colorado State University Greg Kindschi

More information

Inerting System Design for Medium Speed Vertical Spindle Coal Pulverizers TABLE OF CONTENTS

Inerting System Design for Medium Speed Vertical Spindle Coal Pulverizers TABLE OF CONTENTS Inerting System Design for Medium Speed Vertical Spindle Coal Pulverizers The PRB Coal Users Group plans to develop a Design Guide for Mill Inerting as an aid to users when designing a mill inerting system.

More information

Alfalfa Hay for Horses: Myths vs. Reality

Alfalfa Hay for Horses: Myths vs. Reality Alfalfa Hay for Horses: Myths vs. Reality Laurie Lawrence, Ph.D. Professor, Equine Nutrition Department of Animal and Food Sciences University of Kentucky Lexington, KY 40546-0215 llawrenc@uky.edu How

More information

Hybrid Walleye (Saugeye)- The Wisconsin Experience. Why Walleye? High market value Wide-spread reputation as a food fish Limited domestic supply

Hybrid Walleye (Saugeye)- The Wisconsin Experience. Why Walleye? High market value Wide-spread reputation as a food fish Limited domestic supply QuickTime and a TIFF (Uncompressed) decompressor are needed to see this picture. 4/9/2014 Hybrid Walleye (Saugeye)- The Wisconsin Experience Jim Held Aquaculture Outreach Specialist UW-Extension jaheld@wisc.edu

More information

Best Practices Pneumatics Machine & Design. Written by Richard F. Bullers, CFPPS as published in Fluid Power Journal, July/August 2016

Best Practices Pneumatics Machine & Design. Written by Richard F. Bullers, CFPPS as published in Fluid Power Journal, July/August 2016 Pneumatics Machine & Design Written by Richard F. Bullers, CFPPS as published in Fluid Power Journal, July/August 2016 Contents at Atmospheric Air The air at a compressor s intake contains about 78% nitrogen,

More information

200 / 300 Upgrade Kits

200 / 300 Upgrade Kits NEXUS 210 / 310 UPGRADE KIT INSTALLATION 200 / 300 Upgrade Kits Installation and instruction manual for: Type 2 - Nexus 200 and 300 Upgrade Kit (Upgrades Nexus 200 and 300 Models Manufactured Between 2006-2009

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

Research Question How does the concentration of catalase affect the speed of the decomposition reaction of Hydrogen Peroxide into oxygen and water?

Research Question How does the concentration of catalase affect the speed of the decomposition reaction of Hydrogen Peroxide into oxygen and water? Research Question How does the concentration of catalase affect the speed of the decomposition reaction of Hydrogen Peroxide into oxygen and water? Aim To observe the effect of increasing enzyme (catalase)

More information

Growth of juvenile black sea bass, Centropristis striata, fed either a commercial salmon or trout diet

Growth of juvenile black sea bass, Centropristis striata, fed either a commercial salmon or trout diet Growth of juvenile black sea bass, Centropristis striata, fed either a commercial salmon or trout diet Issued by the Georgia Sea Grant College Program Randal L. Walker and Deborah A. Moroney 1 the University

More information

8.1 Calibration of gas sensors

8.1 Calibration of gas sensors 8.1 Calibration of gas sensors! CAUTION! Calibration gas handling and precautions Observe safety regulation and accident prevention regulations when using or handling test gases. Use test gases in well-ventilated

More information

Paper 2.2. Operation of Ultrasonic Flow Meters at Conditions Different Than Their Calibration

Paper 2.2. Operation of Ultrasonic Flow Meters at Conditions Different Than Their Calibration Paper 2.2 Operation of Ultrasonic Flow Meters at Conditions Different Than Their Calibration Mr William Freund, Daniel Measurement and Control Mr Klaus Zanker, Daniel Measurement and Control Mr Dale Goodson,

More information

4-7 kw/ hp. Dual Output Compressors (Air/Nitrogen) Driving Nitrogen Forward

4-7 kw/ hp. Dual Output Compressors (Air/Nitrogen) Driving Nitrogen Forward GN 4-7 kw/5.5-10 hp Dual Output Compressors (Air/Nitrogen) Driving Nitrogen Forward Total capability, total responsibility Right at the heart of your business, Atlas Copco delivers quality compressed air

More information

CS Controlled Dissolved Gas assembly with optional CS Air Aspirator assembly. Installation and Operation information

CS Controlled Dissolved Gas assembly with optional CS Air Aspirator assembly. Installation and Operation information CS-425-01 Controlled Dissolved Gas assembly with optional CS-603-01 Air Aspirator assembly Installation and Operation information Serial # CS-XXX Date of shipment:, 2005 Shipped to: Purchase order #: xxxxxxx

More information

Pressurised Deaerators

Pressurised Deaerators Pressurised Deaerators Pressurised Deaerators Why gases need to be removed from boiler feedwater Oxygen is the main cause of corrosion in hotwell tanks, feedlines, feedpumps and boilers. If carbon dioxide

More information

Optimizing Gas Supply for Industrial Lasers

Optimizing Gas Supply for Industrial Lasers Optimizing Gas Supply for Industrial Lasers Laser cutting of metals and other materials has grown rapidly due to developments in laser power, advancements in CNC automation, and decreasing costs. The industrial

More information

Pangasius Catfish Production in LVHD Cages with a Soy-Based Feed

Pangasius Catfish Production in LVHD Cages with a Soy-Based Feed Pangasius Catfish Production in LVHD Cages with a Soy-Based Feed Results of ASA/China 2003 Feeding Trial 35-03-114 Michael C. Cremer, Zhang Jian and Zhou Enhua American Soybean Association Room 902, China

More information

Cable Pressurization Buffering

Cable Pressurization Buffering Cable Pressurization Buffering What This Practice Is About Introduction This practice describes the various buffering practices that are used to protect the integrity of the pressurized cable network during

More information

Rainbow Trout Cage Culture Utilizing Different Strains, Stocking Densities, and Feeding Methods in Eastern South Dakota Dugout Ponds

Rainbow Trout Cage Culture Utilizing Different Strains, Stocking Densities, and Feeding Methods in Eastern South Dakota Dugout Ponds South Dakota State University Open PRAIRIE: Open Public Research Access Institutional Repository and Information Exchange Theses and Dissertations 1987 Rainbow Trout Cage Culture Utilizing Different Strains,

More information

International Journal of Technical Research and Applications e-issn: , Volume 4, Issue 3 (May-June, 2016), PP.

International Journal of Technical Research and Applications e-issn: ,  Volume 4, Issue 3 (May-June, 2016), PP. DESIGN AND ANALYSIS OF FEED CHECK VALVE AS CONTROL VALVE USING CFD SOFTWARE R.Nikhil M.Tech Student Industrial & Production Engineering National Institute of Engineering Mysuru, Karnataka, India -570008

More information

Connecting students to their watersheds Coordinated by Naugatuck Pomperaug Chapter of TROUT UNLIMITED

Connecting students to their watersheds Coordinated by Naugatuck Pomperaug Chapter of TROUT UNLIMITED Connecting students to their watersheds Coordinated by Naugatuck Pomperaug Chapter of TROUT UNLIMITED Trout Unlimited is a national grass roots group whose mission is to: Conserve, protect, and restore

More information

STUDY PERFORMANCE REPORT

STUDY PERFORMANCE REPORT STUDY PERFORMANCE REPORT State: Michigan Project No.: F-35-R-24 Study No.: 682 Title: Pond rearing of juvenile lake sturgeon Period Covered: April 1, 1998 to September 30, 1999 Study Objective: To determine

More information

Hatcheries: Role in Restoration and Enhancement of Salmon Populations

Hatcheries: Role in Restoration and Enhancement of Salmon Populations Hatcheries: Role in Restoration and Enhancement of Salmon Populations Hatcheries play a large role in the management, ecology, and evolution of Pacific salmon. Why were/are they built? What are the assumptions

More information

Blue Thumb Test Procedures

Blue Thumb Test Procedures Blue Thumb Test Procedures Items to take to Creek with you: 1. DO Kit (with scissors & thermometer) 2. Sample Bottle 3. Secchi Disk 4. Clip Board (with pen, instructions, and data sheet) 5. Goggles, Gloves,

More information

Accu-Tab PowerBase 3070AT by Axiall Corporation

Accu-Tab PowerBase 3070AT by Axiall Corporation Accu-Tab PowerBase 3070AT by Axiall Corporation Installation and Operating Instructions The PowerBase 3070AT Chlorinator is NSF STD 50 NSF-Listed for pool applications. ONLY Axiall Corp. Accu-Tab Blue

More information

MUDSKIPPER STANDARD OPERATING PROCEDURES

MUDSKIPPER STANDARD OPERATING PROCEDURES MUDSKIPPER STANDARD OPERATING PROCEDURES April 1, 2003 - Revised Dec. 2005 HOUSING: Mudskippers may be held in a variety of tanks as long as they meet the following criteria: 1) The tank size is suitable

More information

CORROSION AT THE AIR-WATER INTERFACE REMOVE THE GAS

CORROSION AT THE AIR-WATER INTERFACE REMOVE THE GAS CORROSION AT THE AIR-WATER INTERFACE There are three (3) physical attributes of oxygen that explain why almost all corrosion in wet pipe fire sprinkler systems occurs in close proximity to trapped air

More information

CAPITAL CONTROLS SERIES NXT3000

CAPITAL CONTROLS SERIES NXT3000 CAPITAL CONTROLS SERIES NXT3000 Modular design gas feed system with self contained automatic switchover capability. The Series NXT3000 Gas Feed System is a family of vacuumoperated, solution-feed gas dispensing

More information

Technical Bulletin 160. Maximum Air Pressure for Diffusers. by:

Technical Bulletin 160. Maximum Air Pressure for Diffusers. by: Technical Bulletin 160 Maximum Air Pressure for Diffusers by: Environmental Dynamics International Published: 11/2016 BULLETIN BRIEF In the design and application of diffuser systems, it is important to

More information

Medical Oxygen Concentrator Systems. Generate gases on site generate savings

Medical Oxygen Concentrator Systems. Generate gases on site generate savings Medical Oxygen Concentrator Systems Medical Oxygen is a critically important commodity to all Health Care Facilities (HCF s) How is Oxygen Supplied? Depending on the size and needs of the HCF, Oxygen can

More information

Applications of a Magnetic Sector Process Mass Spectrometer to the Analysis of Variable Vacuum Samples

Applications of a Magnetic Sector Process Mass Spectrometer to the Analysis of Variable Vacuum Samples Applications of a Magnetic Sector Process Mass Spectrometer to the Analysis of Variable Vacuum Samples Outline of Presentation Introduction Process Gas Analysis Magnetic Sector Mass Spectrometer Standard

More information

Aqua Ice Oxygenation in Land Based Fish Tanks. Kenneth Glomset Linde Technologist Senior Expert Aquaculture Application Technology Linde Gas

Aqua Ice Oxygenation in Land Based Fish Tanks. Kenneth Glomset Linde Technologist Senior Expert Aquaculture Application Technology Linde Gas Aqua Ice 2018 Oxygenation in Land Based Fish Tanks Strandbúnaður 2018, Grand Hótel Reykjavík, 19.-20. mars. Kenneth Glomset Linde Technologist Senior Expert Aquaculture Application Technology Linde Gas

More information