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dc.contributor.author
Gonzalez Zevallos, Diego Ricardo
dc.contributor.author
Yorio, Pablo Martin
dc.contributor.author
Svagelj, Walter Sergio
dc.date.available
2019-09-11T21:13:47Z
dc.date.issued
2011-06
dc.identifier.citation
Gonzalez Zevallos, Diego Ricardo; Yorio, Pablo Martin; Svagelj, Walter Sergio; Seabird attendance and incidental mortality at shrimp fisheries in Golfo San Jorge, Argentina; Inter-Research; Marine Ecology Progress Series; 432; 6-2011; 125-135
dc.identifier.issn
0171-8630
dc.identifier.uri
http://hdl.handle.net/11336/83392
dc.description.abstract
Many seabirds are attracted to trawl vessels to make use of fishery waste, and often this attraction results in increased incidental mortality. We assessed seabird attendance and associated incidental mortality at the Argentine red shrimp Pleoticus muelleri trawl fishery in Golfo San Jorge, Argentina. Information on seabird numbers was gathered in the autumn and winter 2006 and spring 2008, while information on seabird incidental captures was obtained for the period 2005-2007. Eighteen seabird species attended vessels, and the 2 most frequent and abundant seabirds (percent occurrence, median no. haul -1) were the kelp gull Larus dominicanus (>94%, <100) and blackbrowed albatross Thalassarche melanophrys (>94%, <55). Seabird numbers were significantly lower in winter than the other 2 seasons and highest during discarding activities. Species incidentally killed in nets were the Magellanic penguin Spheniscus magellanicus and imperial cormorant Phalacrocorax atriceps, with a mean capture rate of 0.048 birds haul-1, and for both species, mortality decreased with distance to the coast. Considering the fishery's fishing effort during each month, the estimated total mortality in the study period was 895 (95% CI: 572 to 1339) penguins and 172 (95% CI: 69 to 305) cormorants. Over 95% of the recorded mortality occurred in 2005, the year when the trawling moratorium generally implemented in the area was not enforced. No interactions with warp cables were recorded. Results highlight the relevance of complying with the current moratorium scheme, as adjusting it to the penguin and cormorant breeding seasons may by a potentially effective management tool. The proximity to the coast of the recorded incidental mortalities indicates the need to reevaluate the spatial design of the park and/or the definition of management actions beyond the boundaries of the Marine Protected Area.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Inter-Research
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Fishing Discards
dc.subject
Patagonia
dc.subject
Seabird By-Catch
dc.subject
Seabird-Fishery Interactions
dc.subject
Trawlers
dc.subject.classification
Zoología, Ornitología, Entomología, Etología
dc.subject.classification
Ciencias Biológicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Seabird attendance and incidental mortality at shrimp fisheries in Golfo San Jorge, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-08-23T18:39:11Z
dc.identifier.eissn
1616-1599
dc.journal.volume
432
dc.journal.pagination
125-135
dc.journal.pais
Alemania
dc.description.fil
Fil: Gonzalez Zevallos, Diego Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina
dc.description.fil
Fil: Yorio, Pablo Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Wildlife Conservation Society; Estados Unidos
dc.description.fil
Fil: Svagelj, Walter Sergio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentina. Wildlife Conservation Society; Estados Unidos
dc.journal.title
Marine Ecology Progress Series
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.3354/meps09146
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.int-res.com/abstracts/meps/v432/p125-135/
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