USDA marine aquaculture center breeds Atlantic salmon
The USDA marine aquaculture center is addressing genetic improvement of North American Atlantic salmon to develop improved lines for producers.
Water temperature, light affect swimming depth, schooling of caged salmon
Since the early 1990s, salmon farmers have added lights to their cages from midwinter to midsummer to reduce the incidence of sexual maturation and improve fish growth.
Antibiotics in aquaculture: Is responsible use possible?
Regulations on antibiotics in aquaculture vary by country and region, from outright bans to minimal oversight.
Shelf life dating for seafood
Since physical and chemical hazards in seafood remain largely unchanged in storage, shelf life can be based on the growth kinetics of microbial hazards.
Southern brown shrimp found susceptible to IMNV
To overcome Infectious Myonecrosis Virus-related mortalities in cultured white shrimp, some Brazilian shrimp farmers tested the southern brown shrimp in grow-out ponds.
Why shrimp cannot be vaccinated
The principle of vaccination is based on two key elements of immunity: specificity and memory. Shrimp lack the appropriate cells and pathways to respond to specific pathogens and the long-term “memory” to deal with recurring infections.
Fish silage: Bioconverted waste yields useful byproducts
Although its final quality can be variable, fish silage can be an effective protein supplement in feeds for various fish, shellfish and terrestrial animals.
Periphyton-based tilapia-prawn polyculture
In periphyton-based aquaculture, the various invertebrates that colonize the hard substrates provided in ponds supplement artificial feed.
Nutrition and genes research at Virginia Tech
Transcriptomics studies highlight impacts of different treatments on specific genes that can be targeted via nutritional intervention to increase farmed animal performance or welfare.
Chitralada tilapia perform well in small cages in Brazil
A Brazilian study demonstrated it is cost-competitive to grow Chitralada tilapia up to 1 kg in small cages via intensive culture.
Selective breeding with fleshy shrimp
Research at YSFRI’s new Genetic and Breeding Center for Mariculture in Qingdao, China, has produced 180 full-sib and half-sib lines of fleshy shrimp.
Dietary strategies for disease management in the post-antibiotic era
Policies to limit antibiotic use spurred interest in alternative strategies, such as dietary supplementation with immunostimulants and other compounds.
Fish oil replacements shift fatty acid content of farmed fish
Fish oil replacements in feeds alter the nutritional profiles of farmed fish. The challenge is to determine how and when to feed plant or fish oils to maintain desirable omega-3 levels in fillets.
Trials test effects of hormone-supplemented feed on sex reversal of freshwater prawns
The addition of methyltestosterone to freshwater prawns diets did not significantly change the percentage of males in the population, but reduced survival.
Technology transfer: Renovation of commercial shrimp hatchery in Indonesia
In a technology transfer, a semi-abandoned hatchery for black tiger shrimp in Indonesia was remade with applied hatchery methods refined in the West with white shrimp.
Vitamin E levels in tilapia diets affect fillet quality
Vitamin E is a required element in tilapia diets influenced by dietary lipid levels. A 5 percent lipid diet is sufficient to maintain immune responses and healthy reproduction.