Adaptive responses of tropical tuna purse-seiners under temporal regulations

Type Article
Date 2017-02
Language English
Author(s) Torres-Irineo Edgar1, 2, Dreyfus-Leon Michel3, 4, Gaertner Daniel1, Salas Silvia5, Marchal PaulORCID6
Affiliation(s) 1 : Ctr Rech Halieut Mediterraneenne & Tropicale, UMR MARBEC, IRD, Ave Jean Monnet,BP 171, F-34200 Sete, France.
2 : Univ Nacl Autonoma Mexico, CONACYT, Unidad Multidisciplinaria Docencia & Invest, Fac Ciencias, Sisal 97130, Yucatan, Mexico.
3 : UABC, Inst Nacl Pesca, Fac Ciencias Marinas, Ensenada, Baja California, Mexico.
4 : 511 E San Ysidro Blvd 2430, San Ysidro, CA 92173 USA.
5 : Inst Politecn Nacl, Ctr Invest & Estudios Avanzados, Km 6 Antigua Carretera Progreso, Merida 97310, Yucatan, Mexico.
6 : IFREMER, Channel & North Sea Fisheries Dept, 150 Quai Gambetta,BP 699, F-62321 Boulogne S Mer, France.
Source Ambio (0044-7447) (Springer), 2017-02 , Vol. 46 , N. 1 , P. 88-97
DOI 10.1007/s13280-016-0801-x
WOS© Times Cited 1
Keyword(s) Closed season, Eastern tropical Pacific, Fisher behaviour, Purse-seine fishing, Tropical tuna
Abstract The failure to achieve fisheries management objectives has been broadly discussed in international meetings. Measuring the effects of fishery regulations is difficult due to the lack of detailed information. The yellowfin tuna fishery in the eastern Pacific Ocean offers an opportunity to evaluate the fishers’ responses to temporal regulations. We used data from observers on-board Mexican purse-seine fleet, which is the main fleet fishing on dolphin-associated tuna schools. In 2002, the Inter-American Tropical Tuna Commission implemented a closed season to reduce fishing effort for this fishery. For the period 1992–2008, we analysed three fishery indicators using generalized estimating equations to evaluate the fishers’ response to the closure. We found that purse-seiners decreased their time spent in port, increased their fishing sets, and maintained their proportion of successful fishing sets. Our results highlight the relevance of accounting for the fisher behaviour to understand fisheries dynamics when establishing management regulations.
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