Movement of blue shark, Prionace glauca, in the north-east Atlantic based on mark-recapture data
A shark tagging programme along the Portuguese coast was initiated in 2001 in collaboration with the National Marine Fisheries Service. From a total of 168 blue sharks (Prionace glauca) tagged, 34 sharks were recaptured (20 % return rate) providing important information on this species ’ movement pa...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
2005
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.491.715 http://www.flyingsharks.eu/literature/Movement_blue_shark_north-east_Atlantic_based_mark-recapture_data.pdf |
| Summary: | A shark tagging programme along the Portuguese coast was initiated in 2001 in collaboration with the National Marine Fisheries Service. From a total of 168 blue sharks (Prionace glauca) tagged, 34 sharks were recaptured (20 % return rate) providing important information on this species ’ movement patterns for the area. A total of 28 sharks travelled less than 1000 km while at liberty for time periods ranging from 22 to 1294 days.The remaining ¢sh travelled long distances to north-west Africa, central Atlantic and the Bay of Biscay. Only one shark made a transatlantic migration, being recaptured 3187 km from the tagging site. North^south movements seem to be related to seasonal sea-surface temperature variation in the north-east Atlantic. Seasonal segregation of di¡erent life stages also occurs. |
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