Tag Shrimp

A study in Brazil found that the growth superiority brought about by within-family selection of tested shrimp transmitted to the next generation of animals. 

In a study, the authors evaluated the performance of juvenile white shrimp grown at high density and fed diets with varying levels of methionine. Trends toward improvements in feed intake were observed for diets with reduced fishmeal and HMTBa supplementation. 

Although still being refined, the IMNV challenge method developed at the University of Arizona has shown promise as a tool to measure resistance in selected family lines of L. vannamei. 

Production of Pacific white shrimp in near-shore floating cages at sea was shown technically and economically feasible at small scale for several growing cycles, as managed by artisanal fishers and their families on the Pacific coast of Costa Rica. 

The objective of a contingency plan is to quickly recover production through rapid initial response and effective implementation of biosecurity measures. Such plans depend on whether the detected pathogen or disease is exotic or endemic, its potential economic impacts and whether it is to be eradicated. 

Based on the need to utilize thousands of used plastic feed bags rather than dispose of them, VIMIFOS began selling the bags to companies that reprocess them into pellets used to make plastic utensils. 

The development of an effective biosecurity plan requires full understanding of facility design and operations, and knowledge of the animals’ health status and the transmission modes of pathogens in order to identify the risks and define meaningful measures. 

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. 

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. 

Separate family rearing can lead to tank-derived environmental effects that are statistically confounded with full-sib family genetic effects in shrimp breeding. 

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. 

Animal byproducts like blood meal, meat and bone meal and other rendered products are good sources of cholesterol for use in aquaculture feed. 

Various studies suggest that maintaining minimum daily dissolved oxygen concentrations above 3 mg/L in channel catfish and penaeid shrimp ponds assures better feed consumption and growth. 

Recirculating systems, where probiotic, hetero­trophic bacteria compete with pathogenic bacteria, can operate without antibiotics to produce tilapia and shrimp. 

With its large quantities of water and little industry to pollute it, Guyana has the potential to become a greater player in global aquaculture.