Chromosome study on five species of channid fishes (Channa, family Channidae), from Thailand
1991
Thawat Donsakul (Srinakharinwirot Univ. Bankhen Campus, Bangkok (Thailand). Faculty of Science. Dept. of Biology) | Wichian Magtoon
Main purpose of this experiment was to study the chromosome of Channa striata, C. marulius, C. micropeltes, C. lucius and C. gachua from Thailand. Twenty specimens of each species of fishes, 205.5 to 21.0 cm, 17.3 to 23.0 cm, 10.5 to 16.8 cm, 24.2 to 27.5 cm and 10.5 to 15.4 cm in standard length were studied respectively. Method of chromosome preparation was modified from Ida and Kyo (1980), Denton (1973) and Uwa and Ojima (1981). Classification of chromosome followed the method recommended by Levan et al. (1964). The results of this experiment were as follows: 1) The diploid chromosome number of C. striata is 44. The karyotype comprises I pair of metacentric, 1 pair of submetacentric and 20 pairs of acrocentric chromosome. The arm number is 48. 2) The diploid chromosome number of C marulius is 44. The karyotype comprises 2 pairs of metacentric, 2 pairs of subtelocentric and 18 pairs of acrocentric chromosomes. The arm number is 48. 3) The diploid chromosome number of C. micropeltes is 44. The karyotype comprises 2 pairs of submetacentric and 21 pairs of acrocentric chromosomes. The arm number is 46. 4) The diploid chromosome number of C. lucius is 48. The karyotype comprises 1 pair of metacentric, 1 pair of submetacentric, 1 pair of subtelocentric and 19 pairs of acrocentric chromosomes. The arm number is 48. 5) The diploid chromosome number of C. gachua is 112. The karyotype comprises 2 pairs of metacentric, 1 pair of subtelocentric and 53 pairs of acrocentric chromosomes. The arm number is 116. The results of this study are useful for cytotaxonomy of fishes.
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