Tag FCR

Research shows promise to improve shrimp feeding protocols in biofloc systems, especially in regions with significant water temperature fluctuations. 

Inclusion of yeast-fermented poultry byproduct meal in Nile tilapia diets, at rates ranging from 11 to 25 percent, improved fish growth and health. 

The latest Fish In:Fish Out (FIFO) ratios calculated by IFFO – The Marine Ingredients Organisation shows that every kilogram of wild fish utilized in aquafeeds results in a total of 4.55 kilos of farmed fish produced. 

South Africa’s marine fish farming industry burned many investors, but the operational experiences aided productivity in intensive aquaculture systems, especially land-based RAS. The time to invest is now. 

In-Pond Raceway System technology, developed at Auburn University, continues to evolve with improvements in design, construction and more efficient operation. 

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. 

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 variability or growth retardation. 

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. 

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. 

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. 

A trial in a lined, greenhouse-enclosed raceway evaluated the use of a heterotrophic biofloc system equipped with aeration, supplemental oxygen injection and centralized heating to achieve good shrimp production. 

Studies by the author demonstrated that until morning D.O. concentrations fell below 3.0 mg/L, feed consumption of channel catfish was not affected. 

Life cycle assessment studies the environmental and other potential impacts throughout a product’s life, starting at raw material and following it through production, use and disposal. 

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.