Trout Farming Articles
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Six characteristics of extruded feed
Our country is the world’s largest aquatic feed producer, and its aquatic feed production accounts for about half of the world’s total production. In recent years, among the rapidly developing aquatic feed varieties, extruded feed has developed most rapidly and has become a bright spot and growth point in the aquatic feed industry. However, under the conditions of puffing processing, the ...
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Skretting produces sustainable fish food with the help of BESTMIX Recipe Management - Case Study
Skretting, the global aquafeed division of Nutreco, provides innovative and sustainable nutritional solutions and services to the aquaculture industry. This global player has production facilities in 18 countries on five continents. In 2022, the company produced and supplied more than 3 million tons of high-quality feed for more than 60 species of fish and crustaceans. For Skretting, R&D is ...
By BESTMIX
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Continuous DO Data Shifts Paradigm for Aquaculture Production
Continuous DO Data Shifts Paradigm for Aquaculture Production Overview Titikaka Trout Peru is advancing aquaculture production in Lake Titicaca, Peru, through continuous monitoring of dissolved oxygen data, a strategy never before practiced in the region. Challenge At 3,812 meters (12,507 feet), Lake Titicaca is one of the highest-elevation lakes in the world. With a surface area of 8,372 ...
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Aquasend Beacon® Monitors Water Quality at Mt. Lassen Trout Farm
Case Study Description Founded in 1949 at the base of Mt. Lassen in northern California, Mt. Lassen Trout Farm breed various species of trout and is a top trout supplier for recreational fishing areas around northern California. Mt. Lassen consists of several farm locations, each comprised of a series of raceways receiving water flow from local springs sustainably utilizing natural resources and ...
By Aquasend
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In The Booth with Kristin Elliott and Katie Harris
At the Aquaculture Show 2022, Kristin Elliott, CEO of Aquasend, interviewed Katie Harris, President of Mt. Lassen Trout Farm and the U.S. Trout Farmers Association (USTFA) to gain a better understanding of her role as USTFA president and learn more about Mr. Lassen Trout Farm and how their aquaculture farm is structured What does Mt. Lassen Trout Farms Do? Mt. Lassen Trout Farms operates several ...
By Aquasend
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High Quality Animal Aqua Feed Mill Available Russia Uzbekistan Kazakhstan
For a long period of time, Richi Machinery insists on advertising the growth of the industry with the principle of offering clients with modern technology, details as well as knowledge, and has actually been recognized by clients and praised by sector organizations. In order to far better offer the clients of this task, ensure the top quality of the general project, as well as make sure the rapid ...
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Chitin/Chitosan as an Immunostimulant - Case Study
Chitin is component of several crustacean and insect carapace. It is an energy source for several species which can degrade chitin through special enzymes. Disease control, profilaxis and eradication are based on the use of vaccines and chemiotherapeutical substances. But there are a number of pathologies that have no known cure. There are for example, the case of Piscirichettsiosis in Chilean ...
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Krill as a Source of Minerals - Case Study
Krill has a low content of ash making ideal for fresh water feeds. It is lower in content of phosphorus than other marine based meals such as shrimp or fish meal. Its calcium/phosphorus ratio is near to 1,5:1 which favors the absorption of both minerals, and it is significantly lower compared to fish or crustacean meals (3 or ...
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Pond fertilization / Aquaculture
Just as fish need good water quality conditions to thrive, they also need an abundant supply of food to grow. We can provide food for our fish in two different ways: We can give them “artificial” feeds that are prepared either commercially or at home, or we can ensure that they have an abundance of natural foods by using fertilizers to increase pond productivity. In either case, it is ...
By Fishward
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Enhanced resistance to BCWD in Troutlodge strains
Joint research of the United States Department of Agriculture (USDA) and Troutlodge has shown that Genomic Selection can double the prediction accuracy for Bacterial Cold Water Disease (BCWD). Application of Genomic Selection for BCWD resistance to three generations of Troutlodge broodstock resulted in a challenge survival increasing from 33.5% in 2015 to 78.3% in 2019. This is a staggering ...
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Transgenic fish are ready for us. Are we ready for them?
After decades of regulatory and legal challenges, AquaBounty aims to bring genetically engineered salmon to U.S. and Canadian markets next year. On a hill above the cold waters around Prince Edward Island, technicians painstakingly create fertilized Atlantic salmon eggs that include growth-enhancing DNA from two other fish species. The eggs will be shipped to ponds in the high rainforest of ...
By Ensia
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The trout farm effect on Dinocras megacephala (Plecoptera: Perlidae) larvae: Antioxidative defense
Trout production represents one of the major agricultural activities in Serbia. Organic compounds are drained into the environment usually without previous sedimentation, thus affecting the stream biota. Considering that biological monitoring is commonly based on aquatic macroinvertebrates as target organisms, we used larvae of Dinocras megacephala to estimate trout farm effects on mass of the ...
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Concentration dependence of biotransformation in fish liver S9: Optimizing substrate concentrations to estimate hepatic clearance for bioaccumulation assessment
In vitro bioassays to estimate biotransformation rate constants of contaminants in fish are currently being investigated to improve bioaccumulation assessments of hydrophobic contaminants. The present study investigates the relationship between chemical substrate concentration and in vitro biotransformation rate of 4 environmental contaminants (9‐methylanthracene, pyrene, chrysene, and ...
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Toxicokinetics of perfluorooctane sulfonate (PFOS) in rainbow trout (Oncorhynchus mykiss)
Rainbow trout (Oncorhynchus mykiss) confined to respirometer‐metabolism chambers were dosed with perfluorooctane sulfonate (PFOS) by intra‐arterial injection and sampled to obtain concentration time‐course data for plasma, and either urine or expired water. The data were then analyzed using a two‐compartment clearance‐volume model. Renal and branchial clearance rates (CLR and CLB; mL/d/kg) ...
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Interactions between water temperature and contaminant toxicity to freshwater fish
Warming of freshwaters as a result of climate change is expected to have complex interactions with the toxicity of contaminants to aquatic organisms. The present study evaluated the effects of temperature on the acute toxicity of endosulfan, chlorpyrifos, and phenol to 3 warm water species of fish—silver perch, rainbowfish, and western carp gudgeon—and 1 cold water species, rainbow trout. ...
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The interactive toxicity of cadmium, copper, and zinc to Ceriodaphnia dubia and rainbow trout (Oncorhynchus mykiss)
Traditionally aquatic toxicity studies examine the toxicity of a single chemical to an organism, while organisms in nature may be exposed to multiple toxicants. Given this is a more realistic exposure scenario in situ, the authors were interested in understanding the interactive toxicity of multiple metals to aquatic organisms. We performed a series of studies using equitoxic mixtures of ...
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Application of generalized linear mixed model to analyze mixture toxicity: Survival of brown trout affected by copper and zinc
Increased concerns about the toxicity of chemical mixtures have led to greater emphasis on analyzing the interactions among the mixture components based on observed effects. The authors applied a generalized linear mixed model (GLMM) to analyze survival of brown trout (Salmo trutta) acutely exposed to metal mixtures that contained copper and zinc. Compared to dominant conventional approaches ...
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Development of a list of reference chemicals for evaluating alternative methods to in vivo fish bioaccumulation tests
The aim to reduce the number of animals in experiments has highlighted the need to develop and validate non‐animal methods as alternatives to bioaccumulation studies using fish. The present study details a novel 3‐tier approach to develop a list of reference compounds to aid this process. The approach was based on: 1) inclusion of relevant chemical classes supported by high‐quality in vivo ...
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Acute sensitivity of white sturgeon (Acipenser transmontanus) and rainbow trout (Oncorhynchus mykiss) to copper, cadmium, or zinc in water‐only laboratory exposures
The acute toxicity of cadmium, copper, and zinc to White Sturgeon (Acipenser transmontanus) and Rainbow Trout (Oncorhynchus mykiss) were determined for seven developmental life stages in flow‐through water‐only exposures. Metal toxicity varied by species and by life stage. Rainbow Trout were more sensitive to cadmium than White Sturgeon across all life stages with median effect concentrations ...
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Chronic sensitivity of White sturgeon (Acipenser transmontanus) and rainbow trout (Oncorhynchus mykiss) to cadmium, copper, lead, or zinc in laboratory water‐only exposures
Chronic toxicity of cadmium, copper, lead, or zinc to White Sturgeon (Acipenser transmontanus) and Rainbow Trout (Oncorhynchus mykiss) was evaluated in water‐only exposures started with newly hatched larvae or about 1‐month‐old juveniles. The 20% effect concentration (EC20) for cadmium from the sturgeon tests was higher than the EC20 from the trout tests, whereas the EC20 for copper, lead, or ...
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