Temporal and individual variation in the diet of the Neotropical otter,Lontra longicaudis(Olfers, 1818) (Carnivora, Mustelidae), as revealed by stable isotope analysis of vibrissae
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s42991-020-00060-8 http://hdl.handle.net/11449/197238 |
Resumo: | The Neotropical otter,Lontra longicaudis, is a semiaquatic mustelid that preys upon fish, amphibians, and crustaceans, in variable proportions according to habitat and/or season. Due to the difficulty of observing this species in the wild, information on its ecology is typically obtained through vestiges, such as feces, which usually do not provide data at the individual level. Thus, this study aimed to assess temporal and individual variation in the diet of the Neotropical otter through chronologically ordered carbon (delta C-13) and nitrogen (delta N-15) stable isotopes data, as a proxy for dietary variation. For this purpose, isotopic values of 127 fragments of vibrissae collected from 21 individuals found dead along three coastal regions of southern Brazil were analyzed. Values ranged between - 24.0 and - 12.9 parts per thousand for delta C-13 and from 10.6 to 18.4 parts per thousand for delta N-15. Vibrissae isotopic longitudinal data were variable, indicating individual changes in the proportion of food items consumed and in foraging sites that spanned from freshwater to marine environments. Most of the populational variation in isotopic composition resulted from differences between individuals. The results of this study revealed temporal and individual variation in resource and habitat use by the Neotropical otter in three coastal ecosystems, and suggest that a high individual foraging specialization may occur in this species. |
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Temporal and individual variation in the diet of the Neotropical otter,Lontra longicaudis(Olfers, 1818) (Carnivora, Mustelidae), as revealed by stable isotope analysis of vibrissaeCarbonFeeding habitsHabitat useIndividual specializationNitrogenThe Neotropical otter,Lontra longicaudis, is a semiaquatic mustelid that preys upon fish, amphibians, and crustaceans, in variable proportions according to habitat and/or season. Due to the difficulty of observing this species in the wild, information on its ecology is typically obtained through vestiges, such as feces, which usually do not provide data at the individual level. Thus, this study aimed to assess temporal and individual variation in the diet of the Neotropical otter through chronologically ordered carbon (delta C-13) and nitrogen (delta N-15) stable isotopes data, as a proxy for dietary variation. For this purpose, isotopic values of 127 fragments of vibrissae collected from 21 individuals found dead along three coastal regions of southern Brazil were analyzed. Values ranged between - 24.0 and - 12.9 parts per thousand for delta C-13 and from 10.6 to 18.4 parts per thousand for delta N-15. Vibrissae isotopic longitudinal data were variable, indicating individual changes in the proportion of food items consumed and in foraging sites that spanned from freshwater to marine environments. Most of the populational variation in isotopic composition resulted from differences between individuals. The results of this study revealed temporal and individual variation in resource and habitat use by the Neotropical otter in three coastal ecosystems, and suggest that a high individual foraging specialization may occur in this species.Laboratorio de Ecologia e Conservacao da Megafauna Marinha-ECOMEGA (Universidade Federal do Rio Grande-FURG)Nucleo de Educacao e Monitoramento Ambiental-NEMAESEC do Taim (Instituto Chico Mendes-ICMBio)Grupo de Estudos de Mamiferos Aquaticos do Rio Grande do Sul-GEMARSLaboratorio de Mamiferos Aquaticos-LAMAQ (Universidade Federal de Santa Catarina-UFSC)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Fed Rio Grande, Inst Oceanog, Lab Ecol & Conservacao Megafauna Marinha ECOMEGA, BR-96203900 Rio Grande, RS, BrazilUniv Estadual Paulista, Inst Biociencias, Programa Posgrad Biodiversidade Ambientes Costeir, BR-11330900 Sao Vicente, SP, BrazilUniv Fed Rio Grande, Inst Oceanog, Programa Posgrad Oceanog Biol, BR-96203900 Rio Grande, RS, BrazilGrp Estudos Mamiferos Aquat Rio Grande do Sul GEM, BR-95560000 Torres, RS, BrazilUniv Extremo Sul Catarinense, Programa Posgrad Desenvolvimento Socioecon, BR-88806000 Criciuma, SC, BrazilUniv Fed Santa Catarina, Dept Ecol & Zool, Lab Mamiferos Aquat LAMAQ, BR-88040970 Florianopolis, SC, BrazilUniv Estadual Rio Grande do Sul, Lab Biodiversidade & Conservacao, BR-95520000 Osorio, RS, BrazilUniv Estadual Paulista, Inst Biociencias, Programa Posgrad Biodiversidade Ambientes Costeir, BR-11330900 Sao Vicente, SP, BrazilCNPq: PQ 310597/2018-8SpringerUniv Fed Rio GrandeUniversidade Estadual Paulista (Unesp)Grp Estudos Mamiferos Aquat Rio Grande do Sul GEMUniv Extremo Sul CatarinenseUniversidade Federal de Santa Catarina (UFSC)Univ Estadual Rio Grande do SulCarrasco, Thayara S. [UNESP]Lima, Renan C. deBotta, SilvinaMachado, RodrigoSimoes-Lopes, Paulo C.Ott, Paulo H.Secchi, Eduardo R.2020-12-10T20:10:32Z2020-12-10T20:10:32Z2020-08-28info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article505-520http://dx.doi.org/10.1007/s42991-020-00060-8Mammalian Biology. Heidelberg: Springer Heidelberg, v. 100, n. 5, p. 505-520, 2020.1616-5047http://hdl.handle.net/11449/19723810.1007/s42991-020-00060-8WOS:000563607400001Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMammalian Biologyinfo:eu-repo/semantics/openAccess2021-10-23T12:24:34Zoai:repositorio.unesp.br:11449/197238Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T12:24:34Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Temporal and individual variation in the diet of the Neotropical otter,Lontra longicaudis(Olfers, 1818) (Carnivora, Mustelidae), as revealed by stable isotope analysis of vibrissae |
title |
Temporal and individual variation in the diet of the Neotropical otter,Lontra longicaudis(Olfers, 1818) (Carnivora, Mustelidae), as revealed by stable isotope analysis of vibrissae |
spellingShingle |
Temporal and individual variation in the diet of the Neotropical otter,Lontra longicaudis(Olfers, 1818) (Carnivora, Mustelidae), as revealed by stable isotope analysis of vibrissae Carrasco, Thayara S. [UNESP] Carbon Feeding habits Habitat use Individual specialization Nitrogen |
title_short |
Temporal and individual variation in the diet of the Neotropical otter,Lontra longicaudis(Olfers, 1818) (Carnivora, Mustelidae), as revealed by stable isotope analysis of vibrissae |
title_full |
Temporal and individual variation in the diet of the Neotropical otter,Lontra longicaudis(Olfers, 1818) (Carnivora, Mustelidae), as revealed by stable isotope analysis of vibrissae |
title_fullStr |
Temporal and individual variation in the diet of the Neotropical otter,Lontra longicaudis(Olfers, 1818) (Carnivora, Mustelidae), as revealed by stable isotope analysis of vibrissae |
title_full_unstemmed |
Temporal and individual variation in the diet of the Neotropical otter,Lontra longicaudis(Olfers, 1818) (Carnivora, Mustelidae), as revealed by stable isotope analysis of vibrissae |
title_sort |
Temporal and individual variation in the diet of the Neotropical otter,Lontra longicaudis(Olfers, 1818) (Carnivora, Mustelidae), as revealed by stable isotope analysis of vibrissae |
author |
Carrasco, Thayara S. [UNESP] |
author_facet |
Carrasco, Thayara S. [UNESP] Lima, Renan C. de Botta, Silvina Machado, Rodrigo Simoes-Lopes, Paulo C. Ott, Paulo H. Secchi, Eduardo R. |
author_role |
author |
author2 |
Lima, Renan C. de Botta, Silvina Machado, Rodrigo Simoes-Lopes, Paulo C. Ott, Paulo H. Secchi, Eduardo R. |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Univ Fed Rio Grande Universidade Estadual Paulista (Unesp) Grp Estudos Mamiferos Aquat Rio Grande do Sul GEM Univ Extremo Sul Catarinense Universidade Federal de Santa Catarina (UFSC) Univ Estadual Rio Grande do Sul |
dc.contributor.author.fl_str_mv |
Carrasco, Thayara S. [UNESP] Lima, Renan C. de Botta, Silvina Machado, Rodrigo Simoes-Lopes, Paulo C. Ott, Paulo H. Secchi, Eduardo R. |
dc.subject.por.fl_str_mv |
Carbon Feeding habits Habitat use Individual specialization Nitrogen |
topic |
Carbon Feeding habits Habitat use Individual specialization Nitrogen |
description |
The Neotropical otter,Lontra longicaudis, is a semiaquatic mustelid that preys upon fish, amphibians, and crustaceans, in variable proportions according to habitat and/or season. Due to the difficulty of observing this species in the wild, information on its ecology is typically obtained through vestiges, such as feces, which usually do not provide data at the individual level. Thus, this study aimed to assess temporal and individual variation in the diet of the Neotropical otter through chronologically ordered carbon (delta C-13) and nitrogen (delta N-15) stable isotopes data, as a proxy for dietary variation. For this purpose, isotopic values of 127 fragments of vibrissae collected from 21 individuals found dead along three coastal regions of southern Brazil were analyzed. Values ranged between - 24.0 and - 12.9 parts per thousand for delta C-13 and from 10.6 to 18.4 parts per thousand for delta N-15. Vibrissae isotopic longitudinal data were variable, indicating individual changes in the proportion of food items consumed and in foraging sites that spanned from freshwater to marine environments. Most of the populational variation in isotopic composition resulted from differences between individuals. The results of this study revealed temporal and individual variation in resource and habitat use by the Neotropical otter in three coastal ecosystems, and suggest that a high individual foraging specialization may occur in this species. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-10T20:10:32Z 2020-12-10T20:10:32Z 2020-08-28 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s42991-020-00060-8 Mammalian Biology. Heidelberg: Springer Heidelberg, v. 100, n. 5, p. 505-520, 2020. 1616-5047 http://hdl.handle.net/11449/197238 10.1007/s42991-020-00060-8 WOS:000563607400001 |
url |
http://dx.doi.org/10.1007/s42991-020-00060-8 http://hdl.handle.net/11449/197238 |
identifier_str_mv |
Mammalian Biology. Heidelberg: Springer Heidelberg, v. 100, n. 5, p. 505-520, 2020. 1616-5047 10.1007/s42991-020-00060-8 WOS:000563607400001 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Mammalian Biology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
505-520 |
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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1803649661123166208 |