Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parameters
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/1678-4766e2017041 http://hdl.handle.net/11449/159928 |
Resumo: | Demographic information is the basis for evaluating and planning conservation strategies for an endangered species. However, in numerous situations there are methodological or financial limitations to obtain such information for some species. The marsh deer, an endangered Neotropical cervid, is a challenging species to obtain biological information. To help achieve such aims, the study evaluated the applicability of camera traps to obtain demographic information on the marsh deer compared to the traditional aerial census method. Fourteen camera traps were installed for three months on the Capao da Cruz floodplain, in state of Sao Paulo, and ten helicopter flyovers were made along a 13-kilometer trajectory to detect resident marsh deer. In addition to counting deer, the study aimed to identify the sex, age group and individual identification of the antlered males recorded. Population estimates were performed using the capture-mark-recapture method with the camera trap data and by the distance sampling method for aerial observation data. The costs and field efforts expended for both methodologies were calculated and compared. Twenty independent photographic records and 42 sightings were obtained and generated estimates of 0.98 and 1.06 ind/km(2), respectively. In contrast to the aerial census, camera traps allowed us to individually identify branch-antlered males, determine the sex ratio and detect fawns in the population. The cost of camera traps was 78% lower but required 20 times more field effort. Our analysis indicates that camera traps present a superior cost-benefit ratio compared to aerial surveys, since they are more informative, cheaper and offer simpler logistics. Their application extends the possibilities of studying a greater number of populations in a long-term monitoring. |
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Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parametersAerial surveycapture-recapturedistance samplingpopulation estimatesex ratioDemographic information is the basis for evaluating and planning conservation strategies for an endangered species. However, in numerous situations there are methodological or financial limitations to obtain such information for some species. The marsh deer, an endangered Neotropical cervid, is a challenging species to obtain biological information. To help achieve such aims, the study evaluated the applicability of camera traps to obtain demographic information on the marsh deer compared to the traditional aerial census method. Fourteen camera traps were installed for three months on the Capao da Cruz floodplain, in state of Sao Paulo, and ten helicopter flyovers were made along a 13-kilometer trajectory to detect resident marsh deer. In addition to counting deer, the study aimed to identify the sex, age group and individual identification of the antlered males recorded. Population estimates were performed using the capture-mark-recapture method with the camera trap data and by the distance sampling method for aerial observation data. The costs and field efforts expended for both methodologies were calculated and compared. Twenty independent photographic records and 42 sightings were obtained and generated estimates of 0.98 and 1.06 ind/km(2), respectively. In contrast to the aerial census, camera traps allowed us to individually identify branch-antlered males, determine the sex ratio and detect fawns in the population. The cost of camera traps was 78% lower but required 20 times more field effort. Our analysis indicates that camera traps present a superior cost-benefit ratio compared to aerial surveys, since they are more informative, cheaper and offer simpler logistics. Their application extends the possibilities of studying a greater number of populations in a long-term monitoring.FunbioFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Estadual Paulista, UNESP, Nucleo Pesquisa & Conservacao Cervideos NUPECCE, FCAV, Via Acesso Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP, BrazilUniv Estadual Paulista, UNESP, Nucleo Pesquisa & Conservacao Cervideos NUPECCE, FCAV, Via Acesso Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP, BrazilFundacao Zoobotanica Rio Grande Sul, Museu Ciencias NaturaisUniversidade Estadual Paulista (Unesp)Peres, Pedro Henrique F. [UNESP]Polverini, Maxihilian S. [UNESP]Oliveira, Marcio L. [UNESP]Duarte, Jose Mauricio B. [UNESP]2018-11-26T15:45:46Z2018-11-26T15:45:46Z2017-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article8application/pdfhttp://dx.doi.org/10.1590/1678-4766e2017041Iheringia Serie Zoologia. Porto Alegre: Fundacao Zoobotanica Rio Grande Sul, Museu Ciencias Naturais, v. 107, 8 p., 2017.0073-4721http://hdl.handle.net/11449/15992810.1590/1678-4766e2017041S0073-47212017000100241WOS:000416492100002S0073-47212017000100241.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengIheringia Serie Zoologia0,260info:eu-repo/semantics/openAccess2023-11-21T06:09:42Zoai:repositorio.unesp.br:11449/159928Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-21T06:09:42Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parameters |
title |
Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parameters |
spellingShingle |
Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parameters Peres, Pedro Henrique F. [UNESP] Aerial survey capture-recapture distance sampling population estimate sex ratio |
title_short |
Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parameters |
title_full |
Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parameters |
title_fullStr |
Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parameters |
title_full_unstemmed |
Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parameters |
title_sort |
Accessing camera trap survey feasibility for estimating Blastocerus dichotomus (Cetartiodactyla, Cervidae) demographic parameters |
author |
Peres, Pedro Henrique F. [UNESP] |
author_facet |
Peres, Pedro Henrique F. [UNESP] Polverini, Maxihilian S. [UNESP] Oliveira, Marcio L. [UNESP] Duarte, Jose Mauricio B. [UNESP] |
author_role |
author |
author2 |
Polverini, Maxihilian S. [UNESP] Oliveira, Marcio L. [UNESP] Duarte, Jose Mauricio B. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Peres, Pedro Henrique F. [UNESP] Polverini, Maxihilian S. [UNESP] Oliveira, Marcio L. [UNESP] Duarte, Jose Mauricio B. [UNESP] |
dc.subject.por.fl_str_mv |
Aerial survey capture-recapture distance sampling population estimate sex ratio |
topic |
Aerial survey capture-recapture distance sampling population estimate sex ratio |
description |
Demographic information is the basis for evaluating and planning conservation strategies for an endangered species. However, in numerous situations there are methodological or financial limitations to obtain such information for some species. The marsh deer, an endangered Neotropical cervid, is a challenging species to obtain biological information. To help achieve such aims, the study evaluated the applicability of camera traps to obtain demographic information on the marsh deer compared to the traditional aerial census method. Fourteen camera traps were installed for three months on the Capao da Cruz floodplain, in state of Sao Paulo, and ten helicopter flyovers were made along a 13-kilometer trajectory to detect resident marsh deer. In addition to counting deer, the study aimed to identify the sex, age group and individual identification of the antlered males recorded. Population estimates were performed using the capture-mark-recapture method with the camera trap data and by the distance sampling method for aerial observation data. The costs and field efforts expended for both methodologies were calculated and compared. Twenty independent photographic records and 42 sightings were obtained and generated estimates of 0.98 and 1.06 ind/km(2), respectively. In contrast to the aerial census, camera traps allowed us to individually identify branch-antlered males, determine the sex ratio and detect fawns in the population. The cost of camera traps was 78% lower but required 20 times more field effort. Our analysis indicates that camera traps present a superior cost-benefit ratio compared to aerial surveys, since they are more informative, cheaper and offer simpler logistics. Their application extends the possibilities of studying a greater number of populations in a long-term monitoring. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-01-01 2018-11-26T15:45:46Z 2018-11-26T15:45:46Z |
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/10.1590/1678-4766e2017041 Iheringia Serie Zoologia. Porto Alegre: Fundacao Zoobotanica Rio Grande Sul, Museu Ciencias Naturais, v. 107, 8 p., 2017. 0073-4721 http://hdl.handle.net/11449/159928 10.1590/1678-4766e2017041 S0073-47212017000100241 WOS:000416492100002 S0073-47212017000100241.pdf |
url |
http://dx.doi.org/10.1590/1678-4766e2017041 http://hdl.handle.net/11449/159928 |
identifier_str_mv |
Iheringia Serie Zoologia. Porto Alegre: Fundacao Zoobotanica Rio Grande Sul, Museu Ciencias Naturais, v. 107, 8 p., 2017. 0073-4721 10.1590/1678-4766e2017041 S0073-47212017000100241 WOS:000416492100002 S0073-47212017000100241.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Iheringia Serie Zoologia 0,260 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
8 application/pdf |
dc.publisher.none.fl_str_mv |
Fundacao Zoobotanica Rio Grande Sul, Museu Ciencias Naturais |
publisher.none.fl_str_mv |
Fundacao Zoobotanica Rio Grande Sul, Museu Ciencias Naturais |
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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1799965015035346944 |