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The present study was carried out to investigate some aspects of the biology of Oreochromis niloticus, it has ecological and economic importance, found in Khashm El-Girba market; here, we describe the length-weight relationships, condition factors and sex ratio of O. niloticus. A total of 525 specimens were collected from August to November 2016. This study indicated that; the regression of length against weight was computed from the relationship W= a L b ; growth coefficient (b) value 2.880 ±0.430 less than 3, which indicate have negative allometric growth. The condition factors (K) is 3.866 ± 0.027; While the sex ratio was (M: F) 1:0.98.

asian journal of research in zoology

Investigation on Some Biological Aspects of Nile Tilapia, Oreochromis niloticus (L. 1758) from Khashm El-Girba Fish Market, Sudan: Length Weight Relationship, Condition Factor and Sex Ratio