KARYOTYPIC STUDIES ON THE NILE FISHES: 1 - CLARIAS LAZERA CUVIER AND VALENCIENNES | ||||
| Assiut Veterinary Medical Journal | ||||
| Article 10, Volume 8, Issue 15.16, January 1981, Page 61-66 PDF (2.17 MB) | ||||
| Document Type: Research article | ||||
| DOI: 10.21608/avmj.1981.191917 | ||||
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| Authors | ||||
| M.M. EL-ZAWAHRI; M.T. WAHBA | ||||
| Depts. of Genetics & Zoology, Faculty of Agriculture & Faculty of Seience, Assiut University | ||||
| Abstract | ||||
| The study of chromosome number and karyology of fishes has become more valuable to ichtyologists interested in taxonomy and evolution. Chromosomes or karyotyp < /strong>es of River Nile fishes have not been reported in the world. The p < /strong>resent pap < /strong>er is intended as the first of a series of karyological studies of River Nile fishes. In this study the karyotyp < /strong>es of one sp < /strong>ecies of family Clariidae: Clarias lazera. The diploid chromosame nunber was found to be 56. It consists of 42 two-arm chromosomes and 14 one-arm chro mosomes. The arm number is 98. No polymorphism in the dip < /strong>loid number nor any sexual dimorphism was noted. The karyotype comp < /strong>rises 10 pairs of metacentric, ll pairs of submetacentric and 7 pairs of sub-telocentric and acrocentric chromosomes. | ||||
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