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.
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.
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.
A quality project for sea bream, sea bass
In trials, finishing diets improved the appearance of sea bass and sea bream with equivalent or higher performance than that achieved with standard grow-out diets.
Protein profiling: Evaluating the condition of farmed Atlantic salmon
A study developed a rapid, nondestructive and sensitive method to evaluate the condition of farmed Atlantic salmon using mass spectrometry with protein chip technology.
PUFAs affect growth, pigmentation in Senegal sole larvae
Inadequate levels of omega-3s in Senegal sole larvae diets can result in retarded growth, delayed metamorphosis, pigmentation problems and high mortalities.
A look at aquaculture genomics
Advances in genomics assist aquaculture science by deepening the understanding of adaptation, physiology and quantitative genetics.
Proactive measures address hepatopancreas problems in HOSO shrimp
A shrimp's ruptured or discolored hepatopancreas is from a combination of factors involving nutrition, stress or toxins at various production chain levels.
Genetics contribute to profitable shrimp production
Genetics is an important factor in shrimp farming. Improvements in disease resistance and robustness can be achieved with within-family selection, shorter generation intervals and marker-assisted selection.
Super-intensive RAS trial yields encouraging shrimp harvest at Oceanic Institute
A super-intensive RAS grow-out trial produced 5.7 kg of shrimp per square meter in 14 weeks using minimal water volume and only 0.34 percent daily water exchange.
Integrated monitoring improves microbiological quality of bivalve mollusks in southern Portugal
Preliminary results indicate that rainfall events and animal feed lots contribute to increasing the amount of fecal contamination in bivalve mollusks.
Feed deprivation reduces resistance of juvenile channel catfish to ESC
Witholding feed from channel catfish during the manifestation of enteric septicemia is a common practice, but discontinued feeding after an ESC challenge increased mortality.
Integrated systems incorporate seaweed in South African abalone culture
South African abalone culture is growing and many of the land-based tank production systems use wild-harvested kelp to feed the animals.
Model shrimp breeding
A model shrimp breeding program in Mexico used a large data set to estimate the heritability of body weight in different environments and the mean family breeding value for body weight using BLUP methodology.
DNA markers help manage Nile tilapia stocks
Determining changes in the genetic diversity of selected hatchery stocks provides a means to monitor inbreeding, control loss of genetic diversity and achieve sustainable levels of genetic gain.