The growth parameters of Chrysichthys nigrodigitatus and Chrysichthys maurus were estimated in Buyo Lake. The study covered 1070 individuals collected monthly between August 2019 and July 2020, including 630 Chrysichthys nigrodigitatus with sizes between 4 cm Ls and 55 cm Ls and 440 Chrysichthys maurus individuals with sizes between 12 cm Ls and 59 cm Ls. The values of L∞, K and Φ' are 69.35 cm; 0.78 yr-1 and 3.57 yr for Chrysichthys nigrodigitatus respectively. The longevity is 3.84 years with a To equal to -0.16 while in Chrysichthys maurus, the longevity is 4.68 years with a To equal to -0.21. The values of L∞, K and Φ' for this species are 61.42 cm; 0.68 yr-1 and 3.38 yr, respectively. Both species exhibit long lifetimes.
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Ouattara et al. (2023) studied this question.
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