Antimicrobial resistance: complex, unavoidable
Resistance to antibiotics is unavoidable because it is an aspect of bacterial evolution. Resistant microflora have been observed in water that has not had recent contact with antimicrobial agents.
The truth about selenium
Selenium in ocean fish is essential for human immune function and required for vital tissues like brain and hormone-producing organs. The trace element also can counter some of the impacts of methylmercury in fish.
Sheepshead: American sea bream shows culture potential
Sheepshead are robust, adaptable, omnivorous fish that are cheap to feed and can be grown in ponds, cages, tanks or raceways in saltwater or freshwater.
Disease management in tilapia
Tilapia in culture are affected by bacterial, viral and parasitic pathogens. Disease impacts vary depending on both environmental and biological factors.
Pompano reared to market size in RAS
In a trial, rearing density affected the mean weight and weight gain of pompano, although differences between treatments became apparent toward the end of the study.
DNA fingerprinting: System for black tiger shrimp
Molecular markers can allow on-farm selection of high-performance families without the need to use costly alternatives such as separate rearing of families/ groups of families or tagging animals.
Arginine: Essential element in fish nutrition, health
Studies indicate dietary arginine supplementation may constitute an effective means of increasing immunocompetency and disease resistance of fish.
Bacterial, chemical residues impact tilapia quality
Both bacterial pathogens and chemical residues can affect the quality of farmed tilapia products. In production systems, Vibrio bacteria quickly proliferate following disease outbreaks.
CSIRO research evaluates technologies to produce genetically protected, all-female shrimp
In Australia, CSIRO is investigating techniques to produce reproductively sterile, all-female shrimp populations through polyploidy, irradiation, or genetic engineering.
GIFT tilapia: Technology for successful selected strain continues
Selective breeding across multiple generations of Nile tilapia representing varied geographic populations yielded the “genetically improved farmed tilapia,” or GIFT tilapia, in the late 1990s.
Immunostimulants for shrimp require further testing
A range of commercial immunostimulants derived from microorganisms claim to boost the innate defense mechanisms and have broad-spectrum positive effects in shrimp.
GIFT tilapia show greater FCR, growth potential than red tilapia
In a study of the effects of interaction between genotype and dietary protein levels on fish performance, GIFT tilapia had greater growth than red hybrids fed diets with equal or higher protein levels.
Black tiger domestication, selective breeding advance in Australia
Using clear-water tank systems, CSIRO and a collaborating farm have advanced the domestication of black tiger stocks in Australia.
Red abalone morphology
Red abalone-breeding programs need to consider total weight rather than shell length when broodstock animals are selected.
Nucleotide supplementation improves survival, production of white shrimp, tilapia in trials
Several trials in Ecuador and Thailand showed that nucleotide supplementation in feed can improve growth and survival in shrimp and tilapia production.
Protein digestive capacity correlated with nutrient presence, availability in shrimp feeds
Shrimp diets need amino acid composition, balance and availability. Protein digestive capacity appears related to both nutrient availability and composition in feed.