O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos
Autor(a) principal: | |
---|---|
Data de Publicação: | 2015 |
Tipo de documento: | Tese |
Idioma: | por |
Título da fonte: | Repositório Institucional da UFG |
Texto Completo: | http://repositorio.bc.ufg.br/tede/handle/tede/5677 |
Resumo: | The population of humpback dolphins Sousa chinensis that resides in the eastern Taiwan Strait (ETS) is geographically and genetically isolated from populations inhabiting the coastal waters of mainland China and appears to be facing unsustainable levels of human threats. Using VORTEX 9.99b, we modeled the viability of this Critically Endangered population under the present conditions as well as under realistic additional threat scenarios. We examined 6 different levels of bycatch mortality, 3 scenarios of habitat loss/degradation, and scenarios in which these threats were experienced together. Under the baseline (present) scenario, the population exhibited a decreasing growth rate and was predicted to be smaller than the initial population size in more than 76% of all model runs. In all scenarios with additional threats, the proportion of model runs in which population size was smaller than the initial size varied from 77.1 to 92.6%. Over the short term, fisheries-related mortality appears to have a more obvious impact on the population’s trajectory than habitat loss/degradation. Even minimal increases in mortality from the current baseline levels will increase the probability of extinction of this population. Due to the fragile situation of ETS humpback dolphins, mitigation actions to reduce the current threats to this population are needed immediately. |
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Brito, Danielhttp://lattes.cnpq.br/5139765780779893http://lattes.cnpq.br/4500097384058348Araújo, Claryana Costa2016-06-10T11:55:33Z2015-03-20ARAÚJO, C. C. O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos. 2015. 155 f. Tese (Doutorado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2015.http://repositorio.bc.ufg.br/tede/handle/tede/5677ark:/38995/00130000066gjThe population of humpback dolphins Sousa chinensis that resides in the eastern Taiwan Strait (ETS) is geographically and genetically isolated from populations inhabiting the coastal waters of mainland China and appears to be facing unsustainable levels of human threats. Using VORTEX 9.99b, we modeled the viability of this Critically Endangered population under the present conditions as well as under realistic additional threat scenarios. We examined 6 different levels of bycatch mortality, 3 scenarios of habitat loss/degradation, and scenarios in which these threats were experienced together. Under the baseline (present) scenario, the population exhibited a decreasing growth rate and was predicted to be smaller than the initial population size in more than 76% of all model runs. In all scenarios with additional threats, the proportion of model runs in which population size was smaller than the initial size varied from 77.1 to 92.6%. Over the short term, fisheries-related mortality appears to have a more obvious impact on the population’s trajectory than habitat loss/degradation. Even minimal increases in mortality from the current baseline levels will increase the probability of extinction of this population. Due to the fragile situation of ETS humpback dolphins, mitigation actions to reduce the current threats to this population are needed immediately.Sem resumo.Submitted by Cláudia Bueno (claudiamoura18@gmail.com) on 2016-06-09T17:40:11Z No. of bitstreams: 2 Tese - Claryana Costa Araújo - 2015.pdf: 2174515 bytes, checksum: 2d205f31fba2cbb199ef183432b131d4 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-06-10T11:55:33Z (GMT) No. of bitstreams: 2 Tese - Claryana Costa Araújo - 2015.pdf: 2174515 bytes, checksum: 2d205f31fba2cbb199ef183432b131d4 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)Made available in DSpace on 2016-06-10T11:55:33Z (GMT). No. of bitstreams: 2 Tese - Claryana Costa Araújo - 2015.pdf: 2174515 bytes, checksum: 2d205f31fba2cbb199ef183432b131d4 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2015-03-20Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPESapplication/pdfporUniversidade Federal de GoiásPrograma de Pós-graduação em Ecologia e Evolução (ICB)UFGBrasilInstituto de Ciências Biológicas - ICB (RG)http://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessPopulation modelingCetaceanConservationMarine mammalECOLOGIA::ECOLOGIA APLICADAO papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceosThe role of anthropogenic impacts on local process and global patterns of extinction in cetaceansinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis-5361682850774351271600600600600-387277211782737340447141651265875087702075167498588264571reponame:Repositório Institucional da UFGinstname:Universidade Federal de Goiás (UFG)instacron:UFGLICENSElicense.txtlicense.txttext/plain; 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dc.title.por.fl_str_mv |
O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos |
dc.title.alternative.eng.fl_str_mv |
The role of anthropogenic impacts on local process and global patterns of extinction in cetaceans |
title |
O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos |
spellingShingle |
O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos Araújo, Claryana Costa Population modeling Cetacean Conservation Marine mammal ECOLOGIA::ECOLOGIA APLICADA |
title_short |
O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos |
title_full |
O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos |
title_fullStr |
O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos |
title_full_unstemmed |
O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos |
title_sort |
O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos |
author |
Araújo, Claryana Costa |
author_facet |
Araújo, Claryana Costa |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Brito, Daniel |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/5139765780779893 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/4500097384058348 |
dc.contributor.author.fl_str_mv |
Araújo, Claryana Costa |
contributor_str_mv |
Brito, Daniel |
dc.subject.eng.fl_str_mv |
Population modeling Cetacean Conservation Marine mammal |
topic |
Population modeling Cetacean Conservation Marine mammal ECOLOGIA::ECOLOGIA APLICADA |
dc.subject.cnpq.fl_str_mv |
ECOLOGIA::ECOLOGIA APLICADA |
description |
The population of humpback dolphins Sousa chinensis that resides in the eastern Taiwan Strait (ETS) is geographically and genetically isolated from populations inhabiting the coastal waters of mainland China and appears to be facing unsustainable levels of human threats. Using VORTEX 9.99b, we modeled the viability of this Critically Endangered population under the present conditions as well as under realistic additional threat scenarios. We examined 6 different levels of bycatch mortality, 3 scenarios of habitat loss/degradation, and scenarios in which these threats were experienced together. Under the baseline (present) scenario, the population exhibited a decreasing growth rate and was predicted to be smaller than the initial population size in more than 76% of all model runs. In all scenarios with additional threats, the proportion of model runs in which population size was smaller than the initial size varied from 77.1 to 92.6%. Over the short term, fisheries-related mortality appears to have a more obvious impact on the population’s trajectory than habitat loss/degradation. Even minimal increases in mortality from the current baseline levels will increase the probability of extinction of this population. Due to the fragile situation of ETS humpback dolphins, mitigation actions to reduce the current threats to this population are needed immediately. |
publishDate |
2015 |
dc.date.issued.fl_str_mv |
2015-03-20 |
dc.date.accessioned.fl_str_mv |
2016-06-10T11:55:33Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
format |
doctoralThesis |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
ARAÚJO, C. C. O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos. 2015. 155 f. Tese (Doutorado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2015. |
dc.identifier.uri.fl_str_mv |
http://repositorio.bc.ufg.br/tede/handle/tede/5677 |
dc.identifier.dark.fl_str_mv |
ark:/38995/00130000066gj |
identifier_str_mv |
ARAÚJO, C. C. O papel dos impactos antrópicos nos processos locais e padrões globais de extinção em cetáceos. 2015. 155 f. Tese (Doutorado em Ecologia e Evolução) - Universidade Federal de Goiás, Goiânia, 2015. ark:/38995/00130000066gj |
url |
http://repositorio.bc.ufg.br/tede/handle/tede/5677 |
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por |
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por |
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600 600 600 600 |
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4714165126587508770 |
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http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
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http://creativecommons.org/licenses/by-nc-nd/4.0/ |
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openAccess |
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Universidade Federal de Goiás |
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UFG |
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Brasil |
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Instituto de Ciências Biológicas - ICB (RG) |
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Universidade Federal de Goiás |
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