ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on April 23, 2008
ICES Journal of Marine Science: Journal du Conseil 2008 65(6):899-905; doi:10.1093/icesjms/fsn067
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Effects of hook size and barbless hooks on hooking injury, catch per unit effort, and fish size in a mixed-species recreational fishery in the western Mediterranean Sea
1 Instituto Mediterráneo de Estudios Avanzados, IMEDEA (CSIC–UIB), C/ Miquel Marqués 21, 07190 Esporles, Illes Balears, Spain
2 Laboratori de Biologia Marina, Departament de Biologia, Universitat de les Illes Balears, Edif. Guillem Colom. Crta., Valldemossa Km 7.5, 07122 Palma de Mallorca, Illes Balears, Spain
3 Direcció General de Pesca, Govern de les Illes Balears, C/ Foners 10, 07006 Palma de Mallorca, Illes Balears, Spain
Correspondence to J. Alós: tel/fax: +34 971 610829; e-mail: pep.alos{at}uib.es.
Alós, J., Palmer, M., Grau, A. M., and Deudero, S. 2008. Effects of hook size and barbless hooks on hooking injury, catch per unit effort, and fish size in a mixed-species recreational fishery in the western Mediterranean Sea. – ICES Journal of Marine Science, 65: 899–905.The effects of hook size (small vs. large) and type (conventional vs. barbless) on hooking injury, catch per unit effort (cpue), and fish size in a mixed-species recreational fishery in the Balearic Islands (western Mediterranean) are evaluated. Hook size was the most important predictor of deep-hooking, which is reduced by the use of large hooks. The size of fish captured was another predictor of deep-hooking incidence, because large fish tended to be caught in deep-hooking locations. Deep-hooking was highly correlated with the presence of bleeding, and unhooking time was reduced by the use of large hooks and barbless hooks, although differences were small. To determine the effects of different hook treatments on cpue and species composition, a mixed-effect linear model was used as a univariate procedure, and redundancy analysis was used as a multivariate analysis. Results showed a drastic decrease in cpue with barbless hooks. In contrast, large hooks reduced the incidence of hooking injuries, with a small reduction in catch rate. Moreover, large hooks were associated with a larger mean size of fish caught than small hooks. Hence, control of hook size, along with other traditional management measures that involve the release of fish, is presented as a management option for sustainable development of recreational fisheries in the western Mediterranean Sea.
Keywords: barbless hook, cpue, deep-hooking, hook size, management, recreational fisheries
Received 6 December 2007; accepted 28 March 2008; advance access publication 23 April 2008.
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