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Journal of Biological Sciences
  Year: 2002 | Volume: 2 | Issue: 10 | Page No.: 662-665
DOI: 10.3923/jbs.2002.662.665
Causes of Morphological Variation in the Hill Mynah Population in Thailand
Manee Archawaranonn

Study of the morphological characteristics of 749 living Hill Mynahs (Gracula religiosa) from throughout Thailand revealed a cline between distinct populations of the two subspecies recognized in this area (G. r. intermedia, G. r. religiosa). A previous study classified morphological variants into five groups, including one that matched each recognized subspecies and three that showed intermediate characteristics. Mean values of most morphological measurements increased toward the south between 5o and 20oN. Studies of mating behavior in nature and in captivity showed that interbreeding occurred among all morphological groups. The morphological variation of Hill Mynahs in Thailand indicated that two distinct subspecies evolved at a time when they were separated from each other by geographical barriers. Since reestablishing contact, they have freely interbred.
 [Fulltext PDF]   [References]   [View Citation]  [Report Citation]
  •    Karyotypes Among Various Morphological Populations of Hill Mynah, Gracula religiosa, from Different Areas in Thailand
  •    Zoogeography of Various Hill Mynah Phenotypes in Thailand
How to cite this article:

Manee Archawaranonn , 2002. Causes of Morphological Variation in the Hill Mynah Population in Thailand . Journal of Biological Sciences, 2: 662-665.

DOI: 10.3923/jbs.2002.662.665






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