The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South America
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s10393-010-0277-2 http://hdl.handle.net/11449/40557 |
Resumo: | Malformed anurans raise concern among scientists, because deformities may relate to the recent global crisis among amphibian populations, although declining populations also may be associated with other causes (e.g., diseases, over-exploitation, and land use/land cover change). We examined a sample of toads (Rhinella jimi, Bufonidae) from an introduced population in the Archipelago of Fernando de Noronha, Brazil where malformations of anurans were thought to be high. Our sample of 159 specimens from the site revealed that 44.6% of all specimens had one or more malformations. Incidence of malformed toads on the mainland sites was substantially lower: 10.5% at Itamaraca, and 3.7% at Propria. We describe the malformations observed, including six undescribed types of malformation of anurans, and we pose possible hypotheses to explain this high incidence of malformed toads. In addition to existing hypotheses, we suggest for the first time the hypothesis that lack of predation pressures contributes to numbers of malformed toads. We indicate the need of specific studies to understand the causes of malformations in the R. jimi population of Fernando de Noronha, which is thought to be extreme foci of malformed amphibians in the world. Our results may improve local conservation action plans as this is an alien population that may be affecting endemic fauna, and may affect populations in other parts of the world, because toad species of the genus Rhinella are recognized as exceptional colonizers. More importantly, unknown variables in these toads' environment are evidently affecting toads during development, which should be a concern for all species that inhabit the area, perhaps even humans. |
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The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South Americaenvironmental conservationFernando de Noronhamalformed toadsRhinella jimiMalformed anurans raise concern among scientists, because deformities may relate to the recent global crisis among amphibian populations, although declining populations also may be associated with other causes (e.g., diseases, over-exploitation, and land use/land cover change). We examined a sample of toads (Rhinella jimi, Bufonidae) from an introduced population in the Archipelago of Fernando de Noronha, Brazil where malformations of anurans were thought to be high. Our sample of 159 specimens from the site revealed that 44.6% of all specimens had one or more malformations. Incidence of malformed toads on the mainland sites was substantially lower: 10.5% at Itamaraca, and 3.7% at Propria. We describe the malformations observed, including six undescribed types of malformation of anurans, and we pose possible hypotheses to explain this high incidence of malformed toads. In addition to existing hypotheses, we suggest for the first time the hypothesis that lack of predation pressures contributes to numbers of malformed toads. We indicate the need of specific studies to understand the causes of malformations in the R. jimi population of Fernando de Noronha, which is thought to be extreme foci of malformed amphibians in the world. Our results may improve local conservation action plans as this is an alien population that may be affecting endemic fauna, and may affect populations in other parts of the world, because toad species of the genus Rhinella are recognized as exceptional colonizers. More importantly, unknown variables in these toads' environment are evidently affecting toads during development, which should be a concern for all species that inhabit the area, perhaps even humans.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Estadual Campinas, Museu Zool Prof Adao Jose Cardoso, Inst Biol, BR-13083863 São Paulo, BrazilUniversidade Federal do Paraná (UFPR), Ctr Politecn, Setor Ciencias Biol, BR-81531980 Curitiba, Parana, BrazilUniv Estadual Paulista, Inst Biociencias, Dept Zool, BR-13506970 São Paulo, BrazilUniv Estadual Paulista, Inst Biociencias, Dept Zool, BR-13506970 São Paulo, BrazilFAPESP: 08/50325-5FAPESP: 08/52847-9SpringerUniversidade Estadual de Campinas (UNICAMP)Universidade Federal do Paraná (UFPR)Universidade Estadual Paulista (Unesp)Toledo, Luis FelipeRibeiro, Ricardo [UNESP]2014-05-20T15:31:25Z2014-05-20T15:31:25Z2009-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject351-357http://dx.doi.org/10.1007/s10393-010-0277-2Ecohealth. New York: Springer, v. 6, n. 3, p. 351-357, 2009.1612-9202http://hdl.handle.net/11449/4055710.1007/s10393-010-0277-2WOS:00027834810000762340850194139490000-0002-7478-4835Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEcohealth2.6490,957info:eu-repo/semantics/openAccess2021-10-23T21:44:13Zoai:repositorio.unesp.br:11449/40557Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T21:44:13Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South America |
title |
The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South America |
spellingShingle |
The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South America Toledo, Luis Felipe environmental conservation Fernando de Noronha malformed toads Rhinella jimi |
title_short |
The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South America |
title_full |
The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South America |
title_fullStr |
The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South America |
title_full_unstemmed |
The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South America |
title_sort |
The Archipelago of Fernando de Noronha: An Intriguing Malformed Toad Hotspot in South America |
author |
Toledo, Luis Felipe |
author_facet |
Toledo, Luis Felipe Ribeiro, Ricardo [UNESP] |
author_role |
author |
author2 |
Ribeiro, Ricardo [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual de Campinas (UNICAMP) Universidade Federal do Paraná (UFPR) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Toledo, Luis Felipe Ribeiro, Ricardo [UNESP] |
dc.subject.por.fl_str_mv |
environmental conservation Fernando de Noronha malformed toads Rhinella jimi |
topic |
environmental conservation Fernando de Noronha malformed toads Rhinella jimi |
description |
Malformed anurans raise concern among scientists, because deformities may relate to the recent global crisis among amphibian populations, although declining populations also may be associated with other causes (e.g., diseases, over-exploitation, and land use/land cover change). We examined a sample of toads (Rhinella jimi, Bufonidae) from an introduced population in the Archipelago of Fernando de Noronha, Brazil where malformations of anurans were thought to be high. Our sample of 159 specimens from the site revealed that 44.6% of all specimens had one or more malformations. Incidence of malformed toads on the mainland sites was substantially lower: 10.5% at Itamaraca, and 3.7% at Propria. We describe the malformations observed, including six undescribed types of malformation of anurans, and we pose possible hypotheses to explain this high incidence of malformed toads. In addition to existing hypotheses, we suggest for the first time the hypothesis that lack of predation pressures contributes to numbers of malformed toads. We indicate the need of specific studies to understand the causes of malformations in the R. jimi population of Fernando de Noronha, which is thought to be extreme foci of malformed amphibians in the world. Our results may improve local conservation action plans as this is an alien population that may be affecting endemic fauna, and may affect populations in other parts of the world, because toad species of the genus Rhinella are recognized as exceptional colonizers. More importantly, unknown variables in these toads' environment are evidently affecting toads during development, which should be a concern for all species that inhabit the area, perhaps even humans. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-09-01 2014-05-20T15:31:25Z 2014-05-20T15:31:25Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s10393-010-0277-2 Ecohealth. New York: Springer, v. 6, n. 3, p. 351-357, 2009. 1612-9202 http://hdl.handle.net/11449/40557 10.1007/s10393-010-0277-2 WOS:000278348100007 6234085019413949 0000-0002-7478-4835 |
url |
http://dx.doi.org/10.1007/s10393-010-0277-2 http://hdl.handle.net/11449/40557 |
identifier_str_mv |
Ecohealth. New York: Springer, v. 6, n. 3, p. 351-357, 2009. 1612-9202 10.1007/s10393-010-0277-2 WOS:000278348100007 6234085019413949 0000-0002-7478-4835 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ecohealth 2.649 0,957 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
351-357 |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1797789551712796672 |