Mortality and injuries of haddock (Melanogrammus aeglefinus) that are caught by pelagic longline ...

• Main Authors: Huse, Irene, Soldal, Aud Vold
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2002 - V - Theme session 2024
• Subjects: Fisheries and aquaculture; Finnmark; Northern Norway
• Online Access: https://dx.doi.org/10.17895/ices.pub.25443448; https://ices-library.figshare.com/articles/conference_contribution/Mortality_and_injuries_of_haddock_Melanogrammus_aeglefinus_that_are_caught_by_pelagic_longline/25443448

No abstracts are to be cited without prior reference to the author.By-catches of haddock (Melanogrammus aeglefinus) below legal size (44 cm total length) in the seasonal pelagic longline fisheries for haddock off the coast of Finnmark, northern Norway, are often high. The small fish are torn off the hook at the vessel side by means of a crucifier or a gaff and returned to the sea. It is generally thought that most of the discarded haddock die. An investigation to quantify this mortality was done in the season for this fishery in 1997. The undersized haddock that were torn off the longline hook were recaptured by gently catching them in a dip net as they reached the sea surface. Survival of haddock torn off by means of crucifier alone was compared to haddock torn of the hook by means of a gaff. The fish were transferred in tanks onboard a vessel to holding pens made of small meshed knotless netting floating at the surface. They were visually monitored for 7-11 days. The control group consisted of haddock ...