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: 2015-03-20 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / 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. / Sem resumo.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.bc.ufg.br:tede/5677 |
| Date | 20 March 2015 |
| Creators | Araújo, Claryana Costa |
| Contributors | Brito, Daniel |
| Publisher | Universidade Federal de Goiás, Programa de Pós-graduação em Ecologia e Evolução (ICB), UFG, Brasil, Instituto de Ciências Biológicas - ICB (RG) |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFG, instname:Universidade Federal de Goiás, instacron:UFG |
| Rights | http://creativecommons.org/licenses/by-nc-nd/4.0/, info:eu-repo/semantics/openAccess |
| Relation | -5361682850774351271, 600, 600, 600, 600, -3872772117827373404, 4714165126587508770, 2075167498588264571 |
Page generated in 0.0024 seconds