Abstract This study analyzes the impact of fishing pressure on the dynamics and resilience of Coptodon guineensis in Lake Toho (southwestern Benin), using size-frequency data (2002-2003 and 2022-2024) processed with FiSAT II. Results show a decline in maximum length and weight (31.3 cm/908 g to 18 cm/119 g), earlier sexual maturity, and a reduction in mature individuals and large breeders. Growth and exploitation parameters indicate reduced longevity, lower yield per recruit, and persistent overexploitation. Overall, the biological and ecological status of the species has deteriorated, undermining its long-term resilience and threatening the food security of local communities dependent on this fishery resource.
Houncheme et al. (Wed,) studied this question.