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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/44984

Title: Distribution patterns of the blue shark Prionace glauca in the Atlantic Ocean, from observer data of the major fishing fleets
Authors: Coelho, R. (Rui);Mejuto-García, J. (Jaime);Domingo, A. (Andrés);Liu, K.M. (Kwuang-Ming);Cortés, E. (Enric);Yokawa, K. (Kotaro);Hazin, F. (Fabio);Arocha, F. (Freddy);Silva, C. (Charlene);García-Cortés, B. (Blanca);Ramos-Cartelle, A. (Ana);Lino, P.G. (Pedro G.);Forselledo, R. (Rodrigo);Mas, F. (Federico);Ohshimo, S. (Seiji);Carvalho, F. (Felipe);Santos, M.N. (Miguel Neves)
Contributors: 國立臺灣海洋大學:海洋事務與資源管理研究所
Keywords: Blue shark;catch-at-size;sex ratios;size composition;size distribution;spatial distribution;spatial models
Date: 2016
Issue Date: 2017-12-21T01:54:37Z
Abstract: Abstract:The blue shark is the most captured shark in pelagic longline fisheries targeting tunas and swordfish. As part of an ongoing cooperative program for fisheries and biological data collection , information collected by fishery observers and scientific Project from several fishing nations in the Atlantic (EU.Spain, EU.Portugal, Uruguay, Taiwán, USA, Japan, Brasil, Venezuela and South Africa) were analyzed. Datasets include information on geographic location, size and sex. A total of 414428 blue sharks records collected between 1992 and 2014 were compiled, with the sizes ranging from 36 to 394 cm FL (fork length). Considerable variability was observed in the size distribution by región and season, with larger sizes tending to ocsur in equatorial and tropical regions and smaller sizes in higher latitudes. The expected distribution of juvenile and adult specimens also showed considerable variability, and the sex ratios varied between regions and sizes classes. The distributional patterns
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/44984
Appears in Collections:[海洋事務與資源管理研究所] 演講及研討會

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