Formulated diets for bivalve spat replace algae in hatchery trials
Although the hatchery rearing of bivalves currently relies heavily on the mass production of microalgae, new feed alternatives are being developed.
Research on spawning, larval rearing of yellowtail jack continues at Hubbs-SeaWorld
The Hubbs-SeaWorld Research Institute’s Mission Bay Laboratory has had limited success hatching and rearing eggs from captive wild yellowtail jack broodstock, but its program is improving.
Trials find feeding frequency factor in catfish performance
Studies indicate that feeding channel catfish once daily to satiation from advanced fingerlings to market size provided maximum growth and production.
Trouts’ carbon dioxide avoidance behavior used to improve transfer, harvest process
In studies, high dissolved carbon dioxide concentrations in culture tank water induced rainbow trout to swim to an area with lower concentrations.
Oxygen management at channel catfish hatcheries
In studies that compared performance of channel catfish hatcheries, eggs hatched six hours sooner with lower-oxygen incubation, but experienced lower survival.
Source affects amino acid uptake in channel catfish diets
In channel catfish diets, amino acid uptake from purified feed supplements is faster than from intact proteins in practical feed ingredients.
Microbial flocs for aquaculture
Microbial flocs consist of a variety of bacteria, fungi, microalgae and other organisms suspended with detritus in culture water.
Walking catfish production in Thailand
The excellent culture characteristics of hybrid walking catfish have made them the dominant culture type in Thailand.
Managing natural productivity in channel catfish nursery ponds
Decisions on stocking channel catfish fry should be based on the abundance of large zooplankton in the pond water, rather than total zooplankton abundance.
U.S. trials compare commercial diets fed to juvenile cobia
In trials with two commercial aquafeeds, juvenile cobia exhibited excellent growth and feed conversion. Higher-than-required lipid levels in the diets did not improve growth.
Reviewing the safety of aquaculture probiotics
Probiotics are naturally occurring microbes in cultured animals or their environments that compete with bacterial pathogens to favorably alter the rearing environment and improve animal health. The success of a probiotic strain depends not only upon its stated and actual performance, but also its safety to the target organism, humans, and the surrounding environment.
Shrimp copyright: Inbreeding strategies effective against copying of genetically improved shrimp
Shrimp breeders often protect their genetic investment by selling broodstock that will accumulate increasing levels of inbreeding in successive generations.
Sulfur amino acid utilization in aquaculture
Dietary sulfur amino acids (methionine and cysteine) are required to support optimal growth, feed efficiency, and nutrient utilization in various fish.
Alfalfa concentrate: natural shrimp color enhancer
Adding alfalfa concentrate containing natural carotenoids and pigments to the finishing diets of shrimp can enhance coloration of shrimp after cooking.
Rockfish a potential culture species in U.S. Northwest
Rockfish aquaculture could potentially benefit wild stock-rebuilding efforts, as well as provide flavorful fish for consumers in the United States.
Development of tetraploid rainbow trout may yield improved triploid production
The culture of sterile triploid rainbow trout, which carry three sets of chromosomes, can limit losses to sexual maturation and reduce potential problems regarding interactions of escaped fish with natural stocks. The authors’ research holds promise for creating tetraploid rainbow trout strains that can be crossed with diploid trout to yield triploids for aquaculture production.