SPF shrimp breeding in Brazil
Through a genetic selection program started in 2006, significant advances have been achieved in the development of a specific pathogen-free L. vannamei line in Brazil.
Ultrasound helps stage sturgeons for caviar production
Biopsies and polarization index measurements of mature sturgeons are highly variable and not always accurate in indicating egg maturity. Ultrasonic imaging offers a simple, less time-consuming and reliable alternative for evaluating sturgeons’ sex and oocyte maturity.
Two-stage selection key for fast shrimp growth in Mexico
The largest shrimp hatchery in Mexico has implemented a two-stage selection program based on body weight at 28 days of age and and body weight at 130 days.
Methionine requirements estimated for white shrimp
Research on the methionine requirement for white shrimp showed a diet requirement of 0.45 percent using a protein-bound form of methionine.
Pangasius juveniles tolerate moderate salinity in test
The ability to culture pangasius in the low-salinity waters typical of coastal shrimp ponds in tidal zones would permit shrimp farmers to culture an additional species of economic importance and aid in diversifying the commercial aquaculture production of these areas.
Rainbow trout attain good growth, health in tank-based recirculating systems
Circular tank-based recirculating aquaculture systems can be used to effectively culture rainbow trout and other salmonids in a bio-secure and environmentally friendly manner that imposes a much lower water and wastewater footprint than traditional flow-through culture technologies.
Selective breeding advances hybrid abalone
Collaborative work at Great Southern Waters has established a closed, genetically diverse breeding population of hybrid abalone. The breeding strategy is to produce and improve commercial stocks with the required hybrid traits by understanding the inheritance of those traits in the pure species and the hybrids.
Study finds alternative anesthetic safe for tilapia fingerlings, breeders
Studies have proposed the use of anesthetics obtained from natural sources as alternatives to conventional chemicals. The authors recently evaluated the efficacy of the anesthetic Eugenol with a small sampling of red tilapia fingerlings and breeders.
Study: Oral method vaccinates rainbow trout against IHNV
Working on a system for oral delivery of IHNV vaccine via fish feed, researchers' goal is to adapt a proven oral DNA-based vaccine given to salmon in Canada to rainbow trout through encapsulation with a polymer or liposome.
Tank effects impact selection responses in shrimp breeding
Separate family rearing can lead to tank-derived environmental effects that are statistically confounded with full-sib family genetic effects in shrimp breeding.
Protein hydrolysates in larval fish nutrition
Protein hydrolysates are currently used as partial substitutes for fishmeal in high-quality artificial diets since their inclusion in feeds promotes growth and survival.
Experimental spawning, larval rearing of lane snapper test diets
As part of the development of rearing procedures at the first commercial marine fish hatchery in Venezuela, a study induced spawning of lane snappers and evaluated the survival of larvae fed rotifers, two microalgae species and enriched artemia.
Whole genome sequencing of aquaculture species
A whole genome sequence allows the identification of candidate genes responsible for production and performance traits for a given species. Ongoing genome projects include programs for Atlantic salmon, Atlantic cod, Pacific oysters, tilapia, catfish and shrimp.
Fishmeal, fish oil not limiting factors for aquaculture
The amount of fishmeal and fish oil used in aquaculture has remained static, while output from aquaculture has increased.
Bacterial testing improves biosecurity at marine hatchery
Microbial surveys of hatchery operations at Oceanic Institute found a strong correlation between hatchery success and cultivable bacteria levels in the water supplied to the larval-rearing systems.
Genetics, environment define crustacean color
Coloration in crustaceans is affected by a combination of factors: diet, environment and genetics. The genes required for coloration are not present in any other animal, but crustaceans use them to create a variety of colors and shell patterns.