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.
EL-ZAWAHRI, M., & WAHBA, M. (1981). KARYOTYPIC STUDIES ON THE NILE FISHES: 1 - CLARIAS LAZERA CUVIER AND VALENCIENNES. Assiut Veterinary Medical Journal, 8(15.16), 61-66. doi: 10.21608/avmj.1981.191917
MLA
M.M. EL-ZAWAHRI; M.T. WAHBA. "KARYOTYPIC STUDIES ON THE NILE FISHES: 1 - CLARIAS LAZERA CUVIER AND VALENCIENNES". Assiut Veterinary Medical Journal, 8, 15.16, 1981, 61-66. doi: 10.21608/avmj.1981.191917
HARVARD
EL-ZAWAHRI, M., WAHBA, M. (1981). 'KARYOTYPIC STUDIES ON THE NILE FISHES: 1 - CLARIAS LAZERA CUVIER AND VALENCIENNES', Assiut Veterinary Medical Journal, 8(15.16), pp. 61-66. doi: 10.21608/avmj.1981.191917
VANCOUVER
EL-ZAWAHRI, M., WAHBA, M. KARYOTYPIC STUDIES ON THE NILE FISHES: 1 - CLARIAS LAZERA CUVIER AND VALENCIENNES. Assiut Veterinary Medical Journal, 1981; 8(15.16): 61-66. doi: 10.21608/avmj.1981.191917
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