[PDF][PDF] Length-weight relationship and condition factor of six cichlid (Cichilidae: Perciformis) species of Anambra River, Nigeria

CI Atama, OC Okeke, FN Ekeh, NE Ezenwaji… - Journal of fisheries …, 2013 - academia.edu
Journal of fisheries and aquaculture, 2013academia.edu
The length-weight relationship and condition factor of six cichlid fish species inhabiting
Anambra River were studied. The cichlid fish species were Chromidotilapia guntheri
Sauvage 1882, Hemichromis bimaculatus Gill 1862, Tilapia zillii Gervais 1848, Hemichromis
fasciatus Peters 1857, Tilapia mariae Boulenger 1899 and Oreochromis niloticus (Linnaeus
1758), obtained from fish landing sites of the river at Ogurugu, Nsugbe and Otuocha. C.
guntheri, H. bimaculatus and T. zillii exhibited positive allometric growth with b= 3.452, 3.828 …
Abstract
The length-weight relationship and condition factor of six cichlid fish species inhabiting Anambra River were studied. The cichlid fish species were Chromidotilapia guntheri Sauvage 1882, Hemichromis bimaculatus Gill 1862, Tilapia zillii Gervais 1848, Hemichromis fasciatus
Peters 1857, Tilapia mariae Boulenger 1899 and Oreochromis niloticus (Linnaeus 1758), obtained from fish landing sites of the river at Ogurugu, Nsugbe and Otuocha. C. guntheri, H. bimaculatus and T. zillii exhibited positive allometric growth with b= 3.452, 3.828 and 3.210, respectively, while H. fasciatus, T. mariae and O. niloticus exhibited negative allometric growth with b= 2.667, 2.272 and 2.792, respectively. There was difference in the condition factors for the combined fish species and the monthly factor for each fish species studied: C. guntheri was 3.44±0.39, H. fasciatus (2.85±0.30), H. bimaculatus (3.52±0.20), T. zillii (3.77±0.30), T. mariae (2.69±0.28) and O. niloticus (2.91±0.31). All species studied were in good condition. Relatively high condition factors of cichlid species estimated in the present study indicated that the physicochemical and biotic variables in the river were within acceptable limits for fish production freshwater ecosystem.
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