Migration of saithe (Pollachius virens) in the Northeast Atlantic

• Main Authors: Eydna I ́ Homrum, Bogi Hansen, Kathrine Michalsen, Julian Burgos, David Righton, Petur Steingrund, Tore Jakobsen, Hlynur Armannsson, Jákup Sverri Joensen
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: migration; Northeast Atlantic; Pollachius virens; Saithe; tagging; Norway
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1032.4583; http://icesjms.oxfordjournals.org/content/70/4/782.full.pdf

Saithe (Pollachius virens) stocks in the Northeast Atlantic intermingle as a result of migration among stock areas. The extent of mi-gration has been poorly quantified. Here, we estimate measures of the migration based on existing tagging data from Icelandic, Faroese and Continental (Scotland, North Sea and Norway) waters. Saithe tagged in Icelandic waters were seldom caught outside Icelandic waters (,1 % of tag returns), whereas 42 % of adult saithe tagged in Faroese waters were recaptured outside Faroese waters. Of adult saithe tagged in Norwegian waters 6.6 % were recaptured outside Continental waters. In broad terms, there was a net migra-tion of saithe towards Icelandic waters. The distance between tagging and recapture increased with increasing size and age, with saithe tagged in Norwegian waters moving the longest distances. The results demonstrate significant, but variable, migration rates of adult saithe in the Northeast Atlantic. More detailed studies are needed to clarify the mechanisms behind the migration and what causes the differences among the areas.