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dc.contributor.author
Machado, Rodrigo
dc.contributor.author
Rosa de Oliveira, Larissa
dc.contributor.author
Ott, Paulo Henrique
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Haimovici, Manuel
dc.contributor.author
Cardoso, Luis Gustavo
dc.contributor.author
Milmann, Lucas
dc.contributor.author
Romero, Maria Alejandra
dc.contributor.author
Dos Santos, Roberta Aguiar
dc.contributor.author
Borges-Martins, Márcio
dc.date.available
2021-01-21T20:47:23Z
dc.date.issued
2020-04
dc.identifier.citation
Machado, Rodrigo; Rosa de Oliveira, Larissa; Ott, Paulo Henrique; Haimovici, Manuel; Cardoso, Luis Gustavo; et al.; Trophic overlap between marine mammals and fisheries in subtropical waters in the western South Atlantic; Inter-Research; Marine Ecology Progress Series; 639; 4-2020; 215-232
dc.identifier.issn
0171-8630
dc.identifier.uri
http://hdl.handle.net/11336/123369
dc.description.abstract
Marine mammals and humans are apex predators and both may compete for fish in ecosystems under continuous fishing pressure. We assessed the degree of trophic overlap between prey species found in the diet of 5 marine mammals (39 specimens of sea lion Otaria flavescens, 61 fur seals Arctocephalus australis, 76 franciscana dolphins Pontoporia blainvillei, 25 bottlenose dolphins Tursiops truncatus and 28 Lahille's bottlenose dolphins T. gephyreus) and the catches of the 6 main commercial fishing gears used in southern Brazil (coastal gillnets, oceanic gillnets, purse seine, demersal pair trawling, bottom [single] trawl and double-rig trawling) between 1993 and 2016. An adjusted general overlap index indicated an overall moderate to high overlap. Specific overlap analysis showed that O. flavescens and T. truncatus presented high trophic relationships with fisheries, followed by T. gephyreus. Smaller interactions were observed for A. australis and P. blainvillei, even though they also exploit commercial fishing resources. Coastal gillnet and pair bottom trawling are the fisheries that most target the fish species favoured by O. flavescens, T. gephyreus and T. truncatus. The information presented in this study on trophic interactions may assist decision making for both fishery management and conservation measures for these apex predators. Commercial fishing activities are a major threat to marine mammals both regionally and globally. Current levels of fishing or its intensification may lead to dramatic changes in the coastal marine food web, including additional threats to coastal marine mammal populations in southern Brazil.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Inter-Research
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
TROPHIC INTERACTIONS
dc.subject
FEEDING ECOLOGY
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MARINE MAMMALS
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FISHERIES
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MARINE CONSERVATION
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Pesca
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Agricultura, Silvicultura y Pesca
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CIENCIAS AGRÍCOLAS
dc.title
Trophic overlap between marine mammals and fisheries in subtropical waters in the western South Atlantic
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-12-04T14:45:15Z
dc.identifier.eissn
1616-1599
dc.journal.volume
639
dc.journal.pagination
215-232
dc.journal.pais
Alemania
dc.journal.ciudad
Oldendorf/Luhe
dc.conicet.avisoEditorial
Access restricted.
dc.description.fil
Fil: Machado, Rodrigo. Universidade Federal do Rio Grande do Sul; Brasil. Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul; Brasil. Universidade do Extremo Sul Catarinense; Brasil
dc.description.fil
Fil: Rosa de Oliveira, Larissa. Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul; Brasil. Universidad de Vale do Rio dos Sinos; Brasil
dc.description.fil
Fil: Ott, Paulo Henrique. Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul; Brasil. Universidade Estadual do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Haimovici, Manuel. Universidade Federal Do Rio Grande; Brasil
dc.description.fil
Fil: Cardoso, Luis Gustavo. Universidade Federal Do Rio Grande; Brasil
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Fil: Milmann, Lucas. Universidade Estadual de Santa Cruz; Brasil. Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul; Brasil
dc.description.fil
Fil: Romero, Maria Alejandra. Universidad Nacional del Comahue. Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos "Almirante Storni". - Provincia de Río Negro. Ministerio de Agricultura, Ganadería y Pesca. Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos "Almirante Storni". Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet Centro Nacional Patagónico. Centro de Investigación Aplicada y Transferencia Tecnológica en Recursos Marinos "Almirante Storni"; Argentina
dc.description.fil
Fil: Dos Santos, Roberta Aguiar. Instituto Chico Mendes de Conservação da Biodiversidade; Brasil. Centro Nacional de Pesquisa e Conservação da Biodiversidade Marinha do Sudeste e Sul; Brasil
dc.description.fil
Fil: Borges-Martins, Márcio. Universidade Federal do Rio Grande do Sul; Brasil. Grupo de Estudos de Mamíferos Aquáticos do Rio Grande do Sul; Brasil
dc.journal.title
Marine Ecology Progress Series
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.3354/meps13284
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.int-res.com/abstracts/meps/v639/p215-232/
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