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

nutrient

Aquafeeds

Digestibility of fishery byproducts tested

A study of shrimp feeding demonstrated the digestibility of byproducts prepared from salmon livers, salmon milt, black cod viscera and arrowtooth heads and viscera from Alaskan fisheries processing plants. 

Responsibility

Pond fertilization reevaluated

Although higher rates have been promoted, pond fertilization ratios of 2:1 or 1:1 nitrogen to phosphorus should be maintained in older ponds for food fish production.