Initial results of satellite linked archival tagging in the Patagonian toothfish (Dissostichus eleginoides Smitt, 1898) around the Falkland Islands ...

• Main Authors: Brown, Judith, Brickle, Paul, Scott, Beth. E., Arkhipkin, Alexander
• Format: Conference Object
• Language: unknown
• Published: ASC 2009 - Theme session B 2024
• Subjects: Fisheries and aquaculture; Ecosystem observation, processes and dynamics; Burdwood Bank; Patagonian Toothfish
• Online Access: https://dx.doi.org/10.17895/ices.pub.25070384.v1; https://ices-library.figshare.com/articles/conference_contribution/Initial_results_of_satellite_linked_archival_tagging_in_the_Patagonian_toothfish_Dissostichus_eleginoides_Smitt_1898_around_the_Falkland_Islands/25070384/1

No abstracts are to be cited without prior reference to the author.Understanding the movements of Patagonian toothfish is an essential component of their fisheries management. As only one demersal longline vessel participates in this fishery in Falkland’s waters, over a vast slope area, the use of conventional tags to provide data on migration and stock assessment is not viable. In contrast, archival pop-up tags have enabled the examination of toothfish movements without having to recapture tagged individuals with reasonability high success rates. A total of 16 toothfish >132cm LT were tagged between 19/09/2007 and 7/08/2009 on the northeastern part of the Falkland Islands’ slope and northern and eastern slopes of the Burdwood Bank. The data from 9 tags that successfully released and uploaded data contradicted a hypothesis concerning the extent of migrations between their spawning and feeding grounds. Instead, the data revealed strong site fidelity, with five toothfish moving less than 50km from their ...