SUMMARY
Length-weight relationships and conversion factors between different weight types are presented for the blue shark (Prionace glauca) and shortfin mako (Isurus oxyrinchus) which are the two of the most prevalent by-catch species in the surface longline fleets. The conversion factors RW-GW and RW-DW o...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.556.9812 http://www.iccat.int/Documents/CVSP/CV062_2008/no_5/CV062051494.pdf |
| Summary: | Length-weight relationships and conversion factors between different weight types are presented for the blue shark (Prionace glauca) and shortfin mako (Isurus oxyrinchus) which are the two of the most prevalent by-catch species in the surface longline fleets. The conversion factors RW-GW and RW-DW obtained for blue shark range, respectively, from 1.1946-1.2219 and 2.4074-2.5052 and from 1.1525-1.1577 and 1.4369-1.4575 for shortfin mako. Linear equations for conversion between different weight types are also presented for both species. The predicted weights from length-weight relationships obtained using nonlinear modeling do not differ from some of the previous length-weight relationships reported by other authors for both species. RÉSUMÉ Les relations longueur-poids et les coefficients de conversion entre différents types de poids sont présentés pour le requin peau bleue (Prionace glauca) et le requin taupe bleue (Isurus oxyrinchus) qui sont les espèces accessoires dominantes des flottilles palangrières de surface. Les coefficients de conversion RW-GW et RW-DW obtenus pour le requin peau bleue s’inscrivent, respectivement, dans la gamme de 1,1946-1,2219 et 2,4074-2,5052 et entre 1,1525-1,1577 et 1,4369-1,4575 pour le requin taupe bleue. Des équations linéaires pour la conversion entre les différents types de poids sont |
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