Morphology and karyology of cyprinid fishes, Tor soro, Puntius orphoides and P. stoliczkanus in Pai River, Mae Hong Son, North, Thailand
1990
Wichian Magtoon | Thawat Donsakul (Srinakharinwirot Univ. Bangkhen Campus, Bangkok (Thailand). Faculty of Science. Dept. of Biology)
Purpose of this experiment was to study the morphology and karyotypes of three cyprinid fishes, Tor soro, Puntius orphoidesand P. stoliczkanus. Ten specimens of Tor soro, P. orphoides and P. stoliczkanus were used in this study. Mitotic metaphase chromosome preparation was modified the method as that described by Uwa and Ojima (1981). Classification of chromosome followed Levan et al., (1964). 1) Three species, Tor soro, Puntius orphoides and P. stoliczkanus have morphological difference among them. 2) The diploid chromosome number of Tor soro is 100. The karyotype comprises 9 pairs of metacentric, 7 pairs of submetacentric, 3 pairs of subtelocentric and 31 pairs of acrocentric chromosomes. The arm number is 132. 3) The diploid chromosome number of puntius orphoides is 50. The karyotype comprises 7 pairs of metacentric 8 pairs of submetacentric, 2 pairs of submetacentric and 8 pairs of acrocentric chromosomes. The arm number is 74. 4) The diploid chromosome number of Puntius stoliczkanus is 50. The karyotype comprises 11 pairs of metacentric, 11 pairs of submetacentric, 2 pairs of subtelocentric and 1 pair of acrocentric chromosomes. The arm number is 94.
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