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movement of blue shark, prionace glauca, in the north-east atlantic based on mark–recapture data

Published online by Cambridge University Press:  06 October 2005

nuno queiroz ,
fernando p. lima ,
anabela maia ,
pedro a. ribeiro ,
joão p. correia  and
antónio m. santos
nuno queiroz
Affiliation:
cibio, centro de investigação em biodiversidade e recursos genéticos, campus agrário de vairão, 4485-661 vairão, portugal
fernando p. lima
Affiliation:
cibio, centro de investigação em biodiversidade e recursos genéticos, campus agrário de vairão, 4485-661 vairão, portugal departamento de zoologia–antropologia, faculdade de ciências da universidade do porto, 4099-002 porto, portugal
anabela maia
Affiliation:
universidade de lisboa, faculdade de ciências, instituto de oceanografia, campo grande, 1749-016 lisboa, portugal
pedro a. ribeiro
Affiliation:
cibio, centro de investigação em biodiversidade e recursos genéticos, campus agrário de vairão, 4485-661 vairão, portugal school of biological sciences, university of southampton, basset crescent east, southampton, so16 7px, uk
joão p. correia
Affiliation:
oceanário de lisboa, sa, esplanada d. carlos i—doca dos olivais, 1990-005 lisboa, portugal
antónio m. santos
Affiliation:
cibio, centro de investigação em biodiversidade e recursos genéticos, campus agrário de vairão, 4485-661 vairão, portugal departamento de zoologia–antropologia, faculdade de ciências da universidade do porto, 4099-002 porto, portugal
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Abstract

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 fish 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 different life stages also occurs.

Type
research article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 85 , Issue 5 , October 2005 , pp. 1107 - 1112
Copyright
© 2005 marine biological association of the united kingdom

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