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Gill length-volume relation of cichlids (Sarotherodon melanotheron) in two Ghanaian lagoons


Chuku, EO and Jonah, FE and Ntim, L, Gill length-volume relation of cichlids (Sarotherodon melanotheron) in two Ghanaian lagoons, International Journal of Ecology and Environmental Sciences, 42, (1) pp. 17-26. ISSN 0377-015X (2016) [Refereed Article]

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National Institute of Ecology, New Delhi. This work is licensed under a Creative Commons Attribution 3.0 License. (

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In sub-Sahara African nations like Ghana, Sarotherodon melanotheron is steadily gaining attention as an alternative to the popularly over-burdened cultured cichlid species Oreochromis niloticus for animal protein. We investigated the relation between gill length and gill volume as well as the relation between some morphometric parameters of the S. melanotheron inhabiting Benya (an open lagoon) and Fosu (closed lagoon) lagoons in Central Ghana. All relations were positively correlated, with the strongest correlation occurring between body weight and standard length. We also describe a "Five-Step Approach to Extracting Gill from Cichlids". Analysis of morphometric parameters indicated that the S. melanotheron populations from Fosu lagoon were generally bigger (15.35 g, S.E. = 0.42) than those from Benya lagoon (9.54 g, S.E. = 0.64), although very big size fish were absent in the former, coupled with significantly wider size distribution from probability plots for length (AD = 8.471; p < 0.005) and weight (AD = 18.877; p < 0.005) for the latter. Mean condition indices were 3.39 and 3.51 for Fosu and Benya Lagoons respectively. Gill length and volume (GL GV) relation had a fairly strong association and was better defined by the expression GV (mL) = 0.1596GL (cm) 1.4599 (R2 = 0.45) for the Benya population, GV (mL) = 0.1401GL (cm) 2.0521 (R = 0.3343) for the Fosu population.

Item Details

Item Type:Refereed Article
Keywords:gills, morphometric relations, food security, Sarotherodon melanotheron, Ghana
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Fisheries sciences
Research Field:Fisheries sciences not elsewhere classified
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Fisheries - recreational marine
UTAS Author:Chuku, EO (Mr Ernest Chuku)
ID Code:153675
Year Published:2016
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2022-09-30
Last Modified:2022-11-15
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