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

ponds

Health & Welfare

Decomposition and accumulation of organic matter in ponds

Aquaculture ponds accumulate organic matter from organic fertilizer, remains of microorganisms produced within the pond, feces of the culture animals and uneaten feed. Claude E. Boyd, Ph.D., details the leading organic matter management practices, and says that the accumulation of 

Aquafeeds

On-farm studies help guide feed decisions

Determining the best feed to purchase is one of the most important challenges of running a profitable aquaculture business. Properly conducted on-farm trials provide valuable data that help direct objective feed decisions. 

Responsibility

Aquaculture ponds hold carbon

Although 16.6 million metric tons of carbon are annually buried in aquaculture ponds, estimated carbon emissions for culture species have approached several metric tons of carbon per metric ton of aquaculture product. 

Responsibility

Oxygen demand of aquaculture feed

The oxygen demand of feed represents the dissolved oxygen removed by the respiration of culture animals, microbial decomposition of uneaten feed and feces, and oxidation of ammonia nitrogen by nitrifying bacteria. 

Responsibility

Calculating chemical treatments for aquaculture production

In calculating chemical treatments to apply to ponds, one must adjust for the percentage of the active ingredients in products. Adjustments for both active ingredient content and specific gravity must be made for liquid products.