Manee Archawaranon
Department of Biology, Faculty of Science, Ramkhamhaeng University, Bangkok 10240, Thailand
Pornchai Wongwasana
The Institute of Research and Development, Ramkhamhaeng University, Bangkok 10240, Thailand
ABSTRACT
Previous studies classified morphological variants of Hill Mynahs in Thailand into five groups, including two well-recognized subspecies Gracula religiosa intermedia, the northern group and G.r. religiosa, the southern group and three new groups that represented intermediate characteristics. The degree of morphological variation among Hill Mynah population was studied in order to detect population dynamics of this species. Hill Mynahs were enumerated at 233 feeding trees of 93 study sites in 31 provinces throughout Thailand. Three new groups were found, intermingled with the northern and the southern groups, between 6 ° and 16 ° N which denoted the contact zone of the two original subspecies found in Thailand. The three new groups which were the interbred outcomes comprised 40% of the studied population and outnumbered their northern and southern counterparts which were 36 and 24%, respectively. Prior to 2002, the morphological variation of this species has never been investigated. If the interbreeding uninterruptedly continues, the population of the northern and the southern groups would tend to be eventually replaced. The trend of the population dynamics of this species in Thailand will change.
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How to cite this article
Manee Archawaranon and Pornchai Wongwasana, 2004. Population Variation of Hill Mynah in Thailand. Journal of Biological Sciences, 4: 229-233.
DOI: 10.3923/jbs.2004.229.233
URL: https://scialert.net/abstract/?doi=jbs.2004.229.233
DOI: 10.3923/jbs.2004.229.233
URL: https://scialert.net/abstract/?doi=jbs.2004.229.233
REFERENCES
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CrossRefDirect Link - Archawaranon, M., 2002. Zoogeography of various hill mynah phenotypes in Thailand. J. Biol. Sci., 2: 645-647.
CrossRefDirect Link - Archawaranon, M., 2003. The impact of human interference on Hill Mynahs Gracula religiosa breeding in Thailand. Bird Conserv. Int., 13: 139-149.
CrossRefDirect Link