Identification of purebredCrocodylus siamensis for reintroduction in Vietnam
| Autor: | Gert Polet, Jason C. Buchan, Phan Viet Lam, Ton That Hung, Nguyen Quoc Thang, Jacob Gratten, Nancy N. FitzSimmons |
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| Rok vydání: | 2002 |
| Předmět: |
Male
Estuarine crocodile Zoology Captivity Breeding Crocodile DNA Mitochondrial Polymerase Chain Reaction Gene flow Critically endangered Species Specificity biology.animal Animals Ecosystem Alligators and Crocodiles biology Ecology Crocodylus moreletii General Medicine biology.organism_classification Vietnam Crocodylus siamensis Female Animal Science and Zoology Purebred Microsatellite Repeats |
| Zdroj: | Journal of Experimental Zoology. 294:373-381 |
| ISSN: | 1097-010X 0022-104X |
| DOI: | 10.1002/jez.10201 |
| Popis: | Crocodylus siamensis, the Siamese crocodile, is a critically endangered species of freshwater crocodile previously distributed throughout much of SE Asia. Recovery plans call for reintroductions to the wild using founder individuals currently in captivity, mostly in commercial crocodile farms. On many farms C. siamensis has been intentionally hybridised with either Cuban crocodiles, C. rhombifer, or the estuarine crocodile, C. porosus, and hybrids may be difficult to distinguish morphologically. We report on the combined use of microsatellite and mtDNA genetic markers to determine the species status of potential founder individuals for reintroduction of C. siamensis. Genetic markers were used to characterise 103 captive and wild-caught individuals of C. siamensis, C. rhombifer and C. porosus in Vietnam and to distinguish purebred versus hybrid individuals. Although the microsatellite loci used had some overlap of allele sizes among species, assignment tests allowed differentiation. Four hybrids were identified, two of which had not been recognised morphologically as hybrids, and one of these was thought to be a C. siamensis suitable for reintroduction. Nineteen of the identified purebred C. siamensis were subsequently released into Cat Tien National Park in southern Vietnam. |
| Databáze: | OpenAIRE |
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