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dc.contributor.author
Pollom, R.
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Barreto, R.
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Charvet, P.
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Chiaramonte, Gustavo Enrique
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Cuevas, J. M.
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Herman, K.
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Martins, M. F.
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Montealegre Quijano, S.
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Motta, F.
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Paesch, L.
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Rincon, G.
dc.date.available
2021-11-04T11:25:11Z
dc.date.issued
2020-12
dc.identifier.citation
Pollom, R.; Barreto, R.; Charvet, P.; Chiaramonte, Gustavo Enrique; Cuevas, J. M.; et al.; Pseudobatos horkelii, Brazilian Guitarfish; International Union for Conservation of Nature; The IUCN Red List of Threatened Species; 12-2020; 1-14
dc.identifier.issn
2307-8235
dc.identifier.uri
http://hdl.handle.net/11336/145934
dc.description.abstract
The Brazilian Guitarfish (Pseudobatos horkelii) is a small (to 138 cm total length) shark-like ray that occurs in the Southwest Atlantic from Rio de Janeiro, Brazil, to northern Argentina. It is demersal on soft substrates of the continental shelf inshore to 150 m depth. It is captured in intense and largely unmanaged commercial and artisanal demersal trawl, gillnet, longline, and beach seine fisheries throughout its geographic range. There are three estimates of population reduction. First, in Rio Grande do Sul, total landings increased from 842 t in 1975 to 1,804 t in 1984 and then declined continuously to 157 t in 2001, the equivalent of a >99% reduction over three generations (55.5 years). Second, the average research trawl catch-per-unit-effort of Brazilian Guitarfish in southern Brazil over the years 1993 to 1999 was 17% of that observed during 1975 to 1986, also the equivalent of a >99% reduction over three generations. Fisheries remain intense and unmanaged there. Third, in Uruguay, this guitarfish is captured frequently in gillnets and longlines, is landed, and is sometimes targeted, and it is also captured in artisanal trawl fisheries. Catches from research trawls there in the 1980s and early 1990s were on average around 1,400 kg/hr, and between 2013 and 2017 were only 480 kg/hr, the equivalent of a >92% reduction over three generations. In Argentina, it is suspected that intense and inadequately managed gillnet fishing pressure has led to declines in abundance there as well. Overall, due to intense and inadequately managed fishing pressure throughout its range, and steep population declines, it is inferred that the Brazilian Guitarfish has undergone a population reduction of >80% over the past three generations (55.5 years), and it is assessed as Critically Endangered A2bd.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
International Union for Conservation of Nature
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Chondrichthyes
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Rhinopristiformes
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Rhinobatidae
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Brazilian Guitarfish
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Conservación de la Biodiversidad
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Ciencias Biológicas
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CIENCIAS NATURALES Y EXACTAS
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dc.title
Pseudobatos horkelii, Brazilian Guitarfish
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-09-07T18:07:20Z
dc.journal.pagination
1-14
dc.journal.pais
Reino Unido
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Fil: Pollom, R.. University Fraser Simon; Canadá
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Fil: Barreto, R.. Instituto Chico Mendes de Conservacao Da Biodiversidade; Brasil
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Fil: Charvet, P.. Universidade Federal do Paraná; Brasil
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Fil: Chiaramonte, Gustavo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia". Estación Hidrobiológica de Puerto Quequén (sede Quequén); Argentina
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Fil: Cuevas, J. M.. Wildlife Conservation Society; Estados Unidos
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Fil: Herman, K.. Georgia Aquarium; Estados Unidos
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Fil: Martins, M. F.. Universidade Federal Do Rio Grande.; Brasil
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Fil: Montealegre Quijano, S.. Universidade Federal de Sao Paulo; Brasil
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Fil: Motta, F.. Universidade Federal de Sao Paulo; Brasil
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Fil: Paesch, L.. Dirección Nacional de Recursos Acuáticos; Uruguay
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Fil: Rincon, G.. Universidade Federal Do Maranhao.; Brasil
dc.journal.title
The IUCN Red List of Threatened Species
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.iucnredlist.org/species/41064/2951089
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