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1.
Zootaxa ; 5263(3): 365-388, 2023 Apr 06.
Artigo em Inglês | MEDLINE | ID: mdl-37044981

RESUMO

Nanorana yunnanensis has been reported in Thailand for many years; however, no specimens have been verifiably described. To verify the identity of this species in Thailand, we observed Thai specimens formerly assigned to the species N. bourreti and N. yunnanensis. The 12S rRNA, 16S rRNA, and ND2 mitochondrial genes were used to clarify the taxonomic statuses of the Thai specimens. The results showed that our specimens formed a clade with N. yunnanensis, containing specimens from southern Yunnan and Vietnam. The respective mean sequence divergences of the 12S and 16S rRNA genes between populations from Thailand versus China were 0.59% and 1.09%, for populations from Thailand versus Vietnam were 0.57% and 0.61%, and for populations from China versus Vietnam were 0.59% and 1.09%. We provide descriptions of the tadpole and adult specimens of N. yunnanensis from Thailand.


Assuntos
Anuros , Animais , Anuros/genética , Filogenia , RNA Ribossômico 16S/genética , Tailândia , Larva/genética , China
2.
PLoS One ; 15(6): e0234064, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32497115

RESUMO

Captive breeding programs for endangered species can increase population numbers for eventual reintroduction to the wild. Captive populations are typically small and isolated, which results in inbreeding and reduction of genetic variability, and may lead to an increased risk of extinction. The Omkoi Wildlife Breeding Center maintains the only Thai captive Chinese goral (Naemorhedus griseus) population, and has plans to reintroduce individuals into natural isolated populations. Genetic variability was assessed within the captive population using microsatellite data. Although no bottleneck was observed, genetic variability was low (allelic richness = 7.091 ± 0.756, He = 0.455 ± 0.219; He < Ho) and 11 microsatellite loci were informative that likely reflect inbreeding. Estimates of small effective population size and limited numbers of founders, combined with wild-born individuals within subpopulations, tend to cause reduction of genetic variability over time in captive programs. This leads to low reproductive fitness and limited ability to adapt to environmental change, thereby increasing the risk of extinction. Management of captive populations as evolutionarily significant units with diverse genetic backgrounds offers an effective strategy for population recovery. Relocation of individuals among subpopulations, or introduction of newly captured wild individuals into the captive program will help to ensure the future security of Chinese goral. Implications for future conservation actions for the species are discussed herein.


Assuntos
Conservação dos Recursos Naturais , Ruminantes/genética , Animais , Cruzamento , Extinção Biológica , Feminino , Variação Genética , Funções Verossimilhança , Masculino , Dinâmica Populacional , Tailândia
3.
Zootaxa ; 4344(3): 573-588, 2017 Nov 08.
Artigo em Inglês | MEDLINE | ID: mdl-29245626

RESUMO

The Great evening bat Ia io Thomas, 1902, previously considered as an endemic to the Indochinese subregion, is reported from the Sundaic subregion for the first time based on specimens collected from three localities in Surat Thani Province and Phang Nga Province, peninsular Thailand. It is described herein as a new subspecies based on its substantially larger body and skull size. The mitochondrial COI and cytochrome b genes reveal that the new subspecies has a genetic distance of 1.89% and 1.65%, respectively, from the nominate subspecies. Echolocation calls comprise four harmonics, with the maximum energy in the first harmonic (fmaxe) of 23.6-27.4 kHz. Notes on the population size as well as roosting and foraging behaviour are also provided.


Assuntos
Quirópteros , Animais , Ecolocação , Tailândia
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