2024-03-28T16:41:18Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/548672017-09-13T07:00:00Zcom_10261_132com_10261_8col_10261_385
00925njm 22002777a 4500
dc
Laneri, Karina
author
Louzao, Maite
author
Martínez-Abraín, Alejandro
author
Arcos, José Manuel
author
Belda, Eduardo Jorge
author
Guallart, Javier
author
Sánchez, Alejandro D.
author
Giménez, Mario
author
Maestre, Raquel
author
Oro, Daniel
author
2010-12-16
Unintended mortality in longlines emerged in the early 1990s as one of the most important threats for pelagic seabirds worldwide. Most of the studies were focused on highly developed industrial fisheries, overlooking bycatch in small-scale artisanal fisheries. However, bycatch in small-scale fisheries might have negative effects similar to those of industrial fisheries when they overlap with hotspot areas of top predators. Moreover, different types of fishing gear coexist in the same oceanographic area, particularly in highly exploited marine ecosystems such as the western Mediterranean. We quantify for the first time the influence of trawling regime on Cory’s shearwater Calonectris diomedea bycatch in the western Mediterranean longline artisanal fishery. The availability of trawling discards has substantial influence on the foraging and breeding ecology of many seabirds, and trawling inactivity may drive shearwaters to seek alternative food resources, such as baits used in longline fishing. Based on our previous knowledge of the system, we also tested other variables affecting bycatch over 8 yr (1998 to 2005). Within this 2-fishery framework, we found that trawling regime, longline fishing time and breeding stage were key factors explaining shearwater attendance to longline vessels, but mainly trawling regime and fishing time increased the incidental capture of Cory’s shearwaters. More specifically, during the pre-breeding and chick-rearing periods, bycatch dramatically increased during sunrise sets in the absence of trawling activity. Importantly, this study indicates the need for an integrated multi-fisheries management approach for the conservation of seabirds and highlights the necessity of banning longline fishing during periods of trawling inactivity.
Marine Ecology Progress Series 420:241-252 (2010)
0171-8630
http://hdl.handle.net/10261/54867
10.3354/meps08847
1616-1599
Small-scale fishery
Interactions between fisheries
Multi-fisheries management
Trawling inactivity
Cory’s shearwater
Mitigation measures
Western Mediterranean
Trawling regime influences longline seabird bycatch in the Mediterranean: new insights from a small-scale fishery