Article: Demography and population trends of the largest population of Indo-Pacific humpback dolphins

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TitleDemography and population trends of the largest population of Indo-Pacific humpback dolphins
AuthorsHuang, SL3 4
Karczmarski, L1
Chen, J2
Zhou, R4
Lin, W2 4
Zhang, H4
Li, H4
Wu, Y4
KeywordsConservation genetics
Demographic survey
Dolphin
Effective population size
Endangered species
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/biocon
CitationBiological Conservation, 2012, v. 147 n. 1, p. 234-242 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.biocon.2012.01.004
AbstractEstimates of demographic parameters and predictive modeling of population viability furnish baseline evidence for informed management of species and populations. There are very few examples of such approaches involving cetaceans due to often limited fundamental data, which frequently impairs the effectiveness of conservation. In this study, we estimate demographic parameters for the Indo-Pacific humpback dolphins, Sousa chinensis, from the Pearl River Estuary (PRE), China, based on a life-table constructed using data from stranded animals. We apply current abundance estimates and use an individual-based Leslie-matrix model to predict the population fluctuation by factoring in parameter uncertainty and demographic stochasticity. Our estimates indicate a continuous rate of population decline of 2.46% per annum, albeit with considerable variation. If the estimated rate of decline remains constant, 74.27% of the current population is projected to be lost after three generations and 57.60% of model simulations meet the criteria for classification as endangered under Criterion A3, applying IUCN Red List Categories and Criteria Version 3.1. However, as PRE is among the fastest economically growing regions of China and the world, the estimated rate of decline may further accelerate in a near future and the projected risk of extinction may be higher. Effective conservation measures are much needed and should be seen as a matter of urgency in management plans targeting PRE and environs. © 2012 Elsevier Ltd.
ISSN0006-3207
2011 Impact Factor: 4.115
2011 SCImago Journal Rankings: 0.152
DOIhttp://dx.doi.org/10.1016/j.biocon.2012.01.004
ReferencesReferences in Scopus
DC Field
Value
dc.contributor.authorHuang, SL
dc.contributor.authorKarczmarski, L
dc.contributor.authorChen, J
dc.contributor.authorZhou, R
dc.contributor.authorLin, W
dc.contributor.authorZhang, H
dc.contributor.authorLi, H
dc.contributor.authorWu, Y
dc.date.accessioned2012-09-20T08:25:59Z
dc.date.available2012-09-20T08:25:59Z
dc.date.issued2012
dc.description.abstractEstimates of demographic parameters and predictive modeling of population viability furnish baseline evidence for informed management of species and populations. There are very few examples of such approaches involving cetaceans due to often limited fundamental data, which frequently impairs the effectiveness of conservation. In this study, we estimate demographic parameters for the Indo-Pacific humpback dolphins, Sousa chinensis, from the Pearl River Estuary (PRE), China, based on a life-table constructed using data from stranded animals. We apply current abundance estimates and use an individual-based Leslie-matrix model to predict the population fluctuation by factoring in parameter uncertainty and demographic stochasticity. Our estimates indicate a continuous rate of population decline of 2.46% per annum, albeit with considerable variation. If the estimated rate of decline remains constant, 74.27% of the current population is projected to be lost after three generations and 57.60% of model simulations meet the criteria for classification as endangered under Criterion A3, applying IUCN Red List Categories and Criteria Version 3.1. However, as PRE is among the fastest economically growing regions of China and the world, the estimated rate of decline may further accelerate in a near future and the projected risk of extinction may be higher. Effective conservation measures are much needed and should be seen as a matter of urgency in management plans targeting PRE and environs. © 2012 Elsevier Ltd.
dc.description.natureLink_to_subscribed_fulltext
dc.identifier.citationBiological Conservation, 2012, v. 147 n. 1, p. 234-242 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.biocon.2012.01.004
dc.identifier.citeulike10313203
dc.identifier.doihttp://dx.doi.org/10.1016/j.biocon.2012.01.004
dc.identifier.epage242
dc.identifier.hkuros210255
dc.identifier.issn0006-3207
2011 Impact Factor: 4.115
2011 SCImago Journal Rankings: 0.152
dc.identifier.issue1
dc.identifier.scopuseid_2-s2.0-84862802640
dc.identifier.spage234
dc.identifier.urihttp://hdl.handle.net/10722/165982
dc.identifier.volume147
dc.languageeng
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/biocon
dc.publisher.placeNetherlands
dc.relation.ispartofBiological Conservation
dc.relation.referencesReferences in Scopus
dc.subjectConservation genetics
dc.subjectDemographic survey
dc.subjectDolphin
dc.subjectEffective population size
dc.subjectEndangered species
dc.titleDemography and population trends of the largest population of Indo-Pacific humpback dolphins
dc.typeArticle
Author Affiliations
  1. The University of Hong Kong
  2. Pearl River Estuary Chinese White Dolphin National Nature Reserve
  3. National Taiwan Ocean University
  4. Sun Yat-Sen University