News features and technical articles about the evolution of aquaculture, one of the world’s fastest growing industries.

FCR

Responsibility

Thoughts on improving responsible aquaculture intervention efforts

Certification programs presently are the best tool to assure that aquaculture products are responsibly produced. But these programs can be burdened by many superfluous requirements and their simplification by focusing primarily on the major issues would be a great improvement. 

Health & Welfare

Biomass density affects bass production

The production period for largemouth bass in ponds hampers the economic feasibility of pond culture in the United States. A study demonstrated that bass fingerlings could be raised at high densities in a semi-closed recirculating system without serious mortality, size 

Aquafeeds

Increased density improves grouper feeding response, growth

A growth trial using hatchery-reared grouper was carried out to study the effects of stocking density on feed intake and subsequent growth. Contrary to common perceptions, fish stocked at the highest density had higher feed intake and body weights. 

Aquafeeds

The Bottom Line: Feeds and water quality revisited

Uneaten or undigested feed and their metabolic byproducts contribute to declines of water quality in aquaculture systems. Accordingly, feed and feeding techniques require continuous review. Reducing overfeeding is an important opportunity for improving feed conversion ratios. 

Health & Welfare

The efficacy of shrimp soluble extract

Vietnam Organic applied an enzymatic hydrolysis process on shrimp head waste to produce a shrimp soluble extract (SSE) feed attractant that contains a mixture of free amino acids and peptide.