Pilot scale studies of intensive cod farming in Norway

摘要

Cod fry produced in a seawater pond at Austevoll, Norway wereused in a farming experiment. Cod larvae were start fed on thenatural plankton in the pond. Additional feeding with dry pelletstarted when the fry were 60 days old. The mean weights were2,5 g when 5.000 cod fry were transferred from the pond to farmingfacilities at the Aquaculture Station in late May. Smallfish were kept in tanks. As the fish grew larger, they weretransferred to net pens. Small fish were fed dry pellet, whilelarger fish were fed moist pellet. Weight of different groupsvaried between 0,5 kg and 1,0 kg after 21 months. Total survivalwas less than 20%, losses were caused by cannibalism, vibriosis,predation and accidental holes in the netpens.