Population Dynamics of Senilia senilis (Linnaeus, 1758) from the Senegal River Delta, Senegal

Mamadou Lamine DIOP¹, Alioune FAYE^2, and Malick DIOUF³

¹Department of Fisheries Protection and Monitoring, Ministry of Fisheries, Maritime and Port Infrastructure, Dakar, BP 3656, Senegal

²Institute of Environmental Sciences, Faculty of Science and Technology, Cheikh Anta Diop University of Dakar, Dakar, BP 5005, Senegal

³Department of Animal Biology, Faculty of Science and Technology, Cheikh Anta Diop University of Dakar, BP 5005, Senegal

Cite this paper:
Mamadou Lamine DIOP, Alioune FAYE and Malick DIOUF. Population Dynamics of Senilia senilis (Linnaeus, 1758) from the Senegal River Delta, Senegal. American Journal of Water Resources. 2025; 13(2):63-68. doi: 10.12691/ajwr-13-2-4

Abstract

This study investigated the growth, mortality and exploitation parameters of Senilia senilis in the Senegal River delta, Senegal. Samples were collected monthly from July 2017 to Jun 2018. The parameters were estimated based on size-frequency data processed by FISAT II software. The measured length of 9939 specimens ranged from 5 to 65.48 mm. The growth parameter (K) was estimated as 1.30 yr^-1 with asymptotic length (L∞ = 68.25 mm). The growth performance index and the theoretical age at birth (t₀) were estimated as 3.78 and -0.097 yr^-1 respectively. Total mortality, natural mortality and fishing mortality rates were estimated as 3.29 yr^-1, 1.64 yr^-1 and 1.65 yr^-1 respectively. The current exploitation rate (E) was calculated as 0.5 which showed an optimal exploitation of Senilia senilis in the Senegal River delta. However, urgent management actions should be taken for a sustainable exploitation of this species.

Keywords:
Senilia senilis Senegal River Gandiol Population Dynamics Growth

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