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Article: Growth rate and an evaluation of age estimation for the endangered Big-headed turtle (Platysternon megacephalum) in China

TitleGrowth rate and an evaluation of age estimation for the endangered Big-headed turtle (Platysternon megacephalum) in China
Authors
Issue Date2015
Citation
Journal of Herpetology, 2015 How to Cite?
Abstract© 2015 Society for the Study of Amphibians and Reptiles. Understanding growth patterns is critical for determining age and size at sexual maturity and longevity in species that are severely threatened by over-collection and habitat loss, particularly in poorly understood species in tropical East Asia. Using data collected during a 9-year mark-recapture study, we fit the von Bertalanffy and logistic growth models to examine growth patterns of the endangered Big-headed Turtle (Platysternon megacephalum). Growth rate of P. megacephalum was best described by the von Bertalanffy model. Mean age at maturation for female and male P. megacephalum was 8 and 13 years. At maturity for female and male P. megacephalum, mean carapace length was 100 mm and 130 mm, respectively. We determined that counting growth rings on the carapace and plastron was not a reliable method for estimating ages. The long time to maturation in P. megacephalum may be costly in harvested populations, with individuals potentially being removed from populations prior to first reproduction. The growth patterns we have documented, and associated information on body size and age at sexual maturity, yield metrics that may be used to assess the effects of harvesting in populations and may contribute to conservation efforts for this endangered species.
Persistent Identifierhttp://hdl.handle.net/10722/206096
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorSung, YHen_US
dc.contributor.authorHau, CHen_US
dc.contributor.authorLau, MWNen_US
dc.contributor.authorCrow, PAen_US
dc.contributor.authorKendrick, RCen_US
dc.contributor.authorBuhlman, KAen_US
dc.contributor.authorAdes, GWJen_US
dc.contributor.authorKarraker, NEen_US
dc.date.accessioned2014-10-20T12:14:04Z-
dc.date.available2014-10-20T12:14:04Z-
dc.date.issued2015en_US
dc.identifier.citationJournal of Herpetology, 2015en_US
dc.identifier.urihttp://hdl.handle.net/10722/206096-
dc.description.abstract© 2015 Society for the Study of Amphibians and Reptiles. Understanding growth patterns is critical for determining age and size at sexual maturity and longevity in species that are severely threatened by over-collection and habitat loss, particularly in poorly understood species in tropical East Asia. Using data collected during a 9-year mark-recapture study, we fit the von Bertalanffy and logistic growth models to examine growth patterns of the endangered Big-headed Turtle (Platysternon megacephalum). Growth rate of P. megacephalum was best described by the von Bertalanffy model. Mean age at maturation for female and male P. megacephalum was 8 and 13 years. At maturity for female and male P. megacephalum, mean carapace length was 100 mm and 130 mm, respectively. We determined that counting growth rings on the carapace and plastron was not a reliable method for estimating ages. The long time to maturation in P. megacephalum may be costly in harvested populations, with individuals potentially being removed from populations prior to first reproduction. The growth patterns we have documented, and associated information on body size and age at sexual maturity, yield metrics that may be used to assess the effects of harvesting in populations and may contribute to conservation efforts for this endangered species.-
dc.languageengen_US
dc.relation.ispartofJournal of Herpetologyen_US
dc.titleGrowth rate and an evaluation of age estimation for the endangered Big-headed turtle (Platysternon megacephalum) in Chinaen_US
dc.typeArticleen_US
dc.identifier.emailHau, CH: chhau@hku.hken_US
dc.identifier.authorityHau, CH=rp00703en_US
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1670/12-166-
dc.identifier.scopuseid_2-s2.0-84925424512-
dc.identifier.hkuros241231en_US
dc.identifier.isiWOS:000351572100014-

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