Spatial migration pattern of deep-sea redfish (Sebastes mentella Travin) of the Norwegian-Barents population from survey data ...

• Main Authors: Drevetnyak, Konstantin, Nedreaas, Kjell H., Kluev, Anton
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2004 - K - Theme session 2024
• Subjects: Fisheries and aquaculture; Technologies and data; The sea and human culture and societies; Sebastes mentella
• Online Access: https://dx.doi.org/10.17895/ices.pub.25349497; https://ices-library.figshare.com/articles/conference_contribution/Spatial_migration_pattern_of_deep-sea_redfish_Sebastes_mentella_Travin_of_the_Norwegian-Barents_population_from_survey_data/25349497

No abstracts are to be cited without prior reference to the author.Study of redfish migration by traditional tagging-methods faces great difficulties. The redfish taken onboard a vessel usually prove to be nonviable. A sharp hydrostatic pressure differential is lethal for the redfish having a closed swim bladder. The main purpose of the present paper is to determine migration pattern of the deep-sea redfish juveniles. To study the deep-sea redfish migration, data from annual Russian and Norwegian scientific trawl surveys conducted during autumn and winter of 1982-1995 were used. The Petersen method was applied to analyse size composition of the deep-sea redfish catches taken during the above trawl surveys. The conclusion made from prior researches that the deepsea redfish year classes of 1982 and 1988 were strong compared to their neighboring ones was confirmed. On the assumption that 'peaks' in the length distributions of survey catches displayed strong yearclasses, the annual corresponding lengths were ...