The seasonal importance of small coastal sharks and rays in the artisanal elasmobranch fishery of Sinaloa, Mexico

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Bizzarro, J. J., Smith, W. D., Castillo-Géniz, J. L., Ocampo-Torres, A., Márquez-Farías, J. F., & Hueter, R. E. (2009). The seasonal importance of small coastal sharks and rays in the artisanal elasmobranch fishery of Sinaloa, Mexico. Pan-American Journal of Aquatic Sciences, 4(4), 513-531.
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TitleThe seasonal importance of small coastal sharks and rays in the artisanal elasmobranch fishery of Sinaloa, Mexico
AuthorsJ. Bizzarro, W. Smith, J. Castillo-Géniz, A. Ocampo-Torres, J. Márquez-Farías, R. Hueter
AbstractSeasonal surveys were conducted during 1998-1999 in Sinaloa, Mexico to determine the extent and activities of the artisanal elasmobranch fishery operating in the southeastern Gulf of California. Twenty-eight fishing sites were documented, the majority of which (78.6%) targeted elasmobranchs during some part of the year. Sharks numerically dominated sampled landings (65.0%, n = 2390), and catch rates exceeded those of rays during autumn-spring. The scalloped hammerhead, Sphyrna lewini, was the primary fishery target during these seasons, with most landings composed of early life stages. During summer, rays, especially Rhinoptera steindachneri, were numerically dominant (87.7%). Large sharks were of comparably minor importance in the artisanal fishery during all seasons. Catch composition was similar between spring and winter (SIMobs = 0.393, SIMexp = 0.415; P = 0.25), largely because the fishery mainly targeted "cazón" (sharks < 1.5 m total length) during this period (e.g., S. lewini, Rhizoprionodon longurio). Small size classes of large sharks and a wide size range of coastal sharks and rays were primarily observed. In addition, size composition of S. lewini and to a lesser extent, R. longurio decreased significantly between historic and contemporary landings. Local populations of these species should therefore be closely monitored.
JournalPan-American Journal of Aquatic Sciences
Date2009
Volume4
Issue4
Start page513
End page531
ISSN18099009
SubjectsChondrichthyes, Elasmobranchii, Rhinoptera steindachneri, Rhizoprionodon longurio, Sphyrna lewini
NoteCited By (since 1996):2, Fish and Fisheries, Source: Scopus

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