SUMMARY
Age and growth estimates for the blue shark, Prionace glauca, were derived from 411 vertebral centra, and 43 tag-recaptures collected in the North Atlantic. The vertebrae of two oxytetracycline-injected recaptures support an annual spring deposition of growth rings in the vertebrae in sharks up to 1...
| Main Authors: | , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.475.8449 http://flyingsharks.eu/literature/iccat/CV054041212 - Age and growth of the Blue Shark.pdf |
| Summary: | Age and growth estimates for the blue shark, Prionace glauca, were derived from 411 vertebral centra, and 43 tag-recaptures collected in the North Atlantic. The vertebrae of two oxytetracycline-injected recaptures support an annual spring deposition of growth rings in the vertebrae in sharks up to 192 cm FL. Males and females were aged to 16 and 15 years, respectively. Both sexes grew similarly to age seven when growth rates decreased in males and remained constant in females. Growth rates from tag-recaptures agreed with those derived from vertebral annuli for smaller sharks but appeared overestimated for larger sharks. Von Bertalanffy growth parameters derived from vertebral length-at-age data are L¥ |
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