Journal article

Technological solutions and operational measures to prevent escapes of Atlantic cod (Gadus morhua) from sea cages

Heidi Moe, Tim Dempster, Leif Magne Sunde, Ulf Winther, Arne Fredheim

Aquaculture Research | BLACKWELL PUBLISHING | Published : 2007

Abstract

Escapes of cod (Gadus morhua) from sea cages represent an economic problem for farmers and a potential environmental problem. We estimate that 0-6% of cod held in sea-cage farms in Norway were reported to have escaped each year from 2000 to 2005, which is a high proportion compared with salmon. We interviewed employees at 19 coastal sea-cage cod farms in Norway to investigate both how and why cultured cod escape and to document cage handling and management strategies that were effective in minimizing escapes. Based on the interviews, we describe five working hypotheses that may explain why a greater proportion of cod than salmon escape: (1) cod are more willing to escape than salmon; (2) cod..

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University of Melbourne Researchers