Morphometric and Gonadosomatic Index Studies of Some Fish species Collected from Lake Alau Maiduguri Borno state Nigeria

1D. Iliyasu, 1A.R. Mustapha, 2F. A. Lawan, 3M. A. Ibrahim, 3M. I. Sambo, 4A. M. Abdullahi, 5M. Mustapha and 6M. H. Timta

1Department of Theriogenology, Faculty of Veterinary Medicine, University of Maiduguri, Nigeria
2Department of Veterinary Microbiology, Faculty of Veterinary Medicine, University of Maiduguri, Nigeria
3Department of Biological Science, Faculty of Science, University of Maiduguri, Nigeria
4Veterinary Teaching Hospital, University of Maiduguri, Nigeria
5Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Maiduguri, Nigeria
6Department of Veterinary Physiology and Biochemistry, Faculty of Veterinary Medicine, University of Maiduguri, Nigeria

*Corresponding author’s Email: disambo@unimaid.edu.ng, doi.org/10.55639/607.181716


ABSTRACT

Morphometric studies of fish are used to determine the growth and reproductive performance. This study was designed to carry out morphometric studies of gonadosomatic index of some fish species collected from Lake Alau Maiduguri Borno state, some fish species commonly found in Lake Alau are Clarias gariepinus, Gymnarchus niloticus, Oreochromis niloticus and Synodontis niloticus. The fishes were collected using hexagonal basket trap. The trapped fishes were transported in a cool chain to the laboratory in the Department of Biological Sciences University of Maiduguri, for identification of sex, species and onward dissection of the abdomen for Morphometric studies of gonadosomatic index (GSI) and hepatosomatic index (HSI). The results revealed relationship between GSI and total length (TL), total weight (TW) and gonad weight (GW). The mean (GSI) and (HSI) were varied significant (P<0.05) with size and gonad maturation stage, it also exhibited significant difference (P<0.05) in correlation with fish TL and TW. It also correlated significantly (P<0.05) with GW, TL and TW. In conclusion this study provided baseline information on some aspects of growth and reproduction performance which is important in the management of some fishes obtained such as Clarias gariepinus, Gymnarchus niloticus, Oreochromis niloticus and Synodontis niloticus, Heterotis niloticus and Elastic Sp this study will guide in selection and management of fish to achieved optimum reproduction.

Keywords:

Morphometric studies,
Fish,
Lake Alau,
Gonadosomatic index,
Hepatosomatic index