Improving salinity tolerance in tilapia
Salinity tolerance in tilapia can be improved by optimizing acclimation protocols, adding salt to the diet or hybridization between fast-growing and salt-tolerant species.
Early Mortality Syndrome affects shrimp in Asia
Early Mortality Syndrome is a new disease that has been detected at shrimp farms in Asia. It appears within 30 days of stocking and causes symptoms that include lethargy; soft, darkened shells and mottling of the carapace.
High nitrate levels toxic to shrimp
Shrimp exposed to high concentrations of nitrate exhibit shorter antennae, gill abnormalities and hepatopancreas lesions. Nitrate toxicity is more of an issue for shrimp raised in lower-salinity waters.
Public-private partnerships boost monosex tilapia fry production
With a hatchery system that involves collection of eggs and larvae, and hormonal sex reversal, it is possible to produce billions of monosex tilapia (all-male) fry to satisfy demand and accelerate aquaculture development.
Taurine: Critical supplement for marine fish feed
Taurine may not only improve growth and performance, but also is required to reduce nutritional diseases such as green liver disease and low hematocrit levels in some fish.
In situ detection of blue crab reovirus
An in situ hybridization procedure can be used to diagnose blue crabs from Chesapeake Bay infected with a reovirus.
Fat components, energy in poultry byproduct meal provide valuable nutrients to shrimp
Poultry byproduct meal can replace much of the fishmeal in shrimp diets. To better understand the nutritive value of its fat, the authors analyzed the fat components and conducted a feeding trial.
Wet mount technique excellent for health monitoring, not NHP diagnosis in shrimp
Necrotizing hepatopancreatitis is a disease of shrimp that causes slow growth, low survival and poor feed conversion. Wet mount analysis is commonly used to diagnose NHP in ponds in Brazil.
Multiple characteristics considered in selection of probiotics for marine shrimp
To develop probiotics for marine shrimp, authors chose a bacterium with high growth velocity and great capacity to inhibit pathogens, among other traits.
Dissolved oxygen requirements in aquatic animal respiration
Although carbon dioxide is not highly toxic, high levels in the blood have many negative physiological consequences. As carbon dioxide increases, higher dissolved oxygen tension is necessary to load hemoglobin with oxygen.
WSSV and TSV: Diseases as drivers in the shrimp-farming industry
Key to avoiding the cyclical rise and fall of production and prices is the move toward controlled reproduction of shrimp to perform within the structure chosen, whether that is disease coping or disease avoidance.
Tail weight, yield traits considered for shrimp-breeding program
To evaluate the value of incorporating tail weight and yield in shrimp-breeding programs, the authors carried out a study to estimate heritabilities and genetic correlations for the traits.
Genetics key to understanding shrimp growth rates
Achieving higher growth rates in shrimp can reduce risks, cut costs and increase economic opportunities. The amount of additional growth that is achievable is related primarily to shrimp genetics.
China’s tilapia germplasm: Chance and challenge
China’s expansive tilapia culture industry is based on exotic species introduced continuously since 1956. Technical advances for improving the limited germplasm are expected to aid the industry.
Floating closed-containment aquaculture
Floating closed-containment systems incorporate low-pressure pumping, oxygen supplementation, solid-waste separation and efficient feed management.
Digestibility enhancer can offset cholesterol content in shrimp feed
Cholesterol is an essential nutrient for penaeid shrimp. Trials found that a digestibility enhancer based on natural emulsifiers was as effective as purified cholesterol in improving shrimp growth and feed conversion.