POPULATION DYNAMICS AND EXPLOITATION PARAMETERS OF CALLINECTES AMNICOLA (ROCHEBRUNE, 1883) IN THE LAGOON COMPLEXES OF SOUTH

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AuteurDESSOUASSI, COMLAN EUGENE
AuteurLEDEROUN, DJIMAN
AuteurGANGBE, LUC
AuteurLALEYE, PHILIPPE A
Date d'ajout2026-06-02T16:06:57Z
Date de disponibilite2026-06-02T16:06:57Z
Date de publication2023
ResumeTo ensure the sustainable management of fisheries resources in Benin, the population dynamics of Callinectes amnicola are being studied in two locations: the lake Nokoué-Porto-Novo lagoon complex and the lake Ahémé-Coastal lagoon complex. Monthly recordings of carapace length were conducted on 5,850 crabs from lake Nokoué-Porto-Novo lagoon complex between February 2017 and January 2018, while 2,252 crabs from lake Ahémé-Coastal lagoon complex were analyzed using FiSAT II software to determine population dynamics parameters. The estimated asymptotic carapace lengths (L∞) were found to be 14.70 cm and 17.85 cm for lake Nokoué-Porto-Novo lagoon complex and lake Ahémé-Coastal lagoon complex, respectively. The growth rate (K) was calculated as 3.1 for lake Nokoué-Porto-Novo lagoon complex and 0.63 for lake Ahémé-Coastal lagoon complex. Estimates of fishing mortality (F) were determined as 6.97 year−1 for lake Nokoué-Porto-Novo lagoon complex and 0.66 year−1 for lake Ahémé-Coastal lagoon complex. The size at first capture was estimated to be 11.87 cm for lake Nokoué-Porto-Novo lagoon complex and 11.20 cm for lake Ahémé-Coastal lagoon complex. The current exploitation rates were found to be 0.60 for lake Nokoué-Porto-Novo lagoon complex and 0.3 for lake Ahémé-Coastal lagoon complex. These findings indicate that the stock of Callinectes amnicola is overexploited in lake Nokoué-Porto-Novo lagoon complex, while in contrast, it is not overexploited in lake Ahémé-Coastal lagoon complex. The stocks in lake Nokoué-Porto-Novo lagoon complex have reached a critical level of overexploitation. Therefore, it is necessary to reduce the level of species exploitation in this complex while respecting the optimal carapace length.
Autre identifiantBECDB-13593
URIhttps://dspace.uac.bj/handle/123456789/11637
Languefr
Fait partie deAnnales des sciences agronomiques
SujetCoastal lagoon
SujetCrab
Sujetlake Ahémé
SujetLake Nokoué
SujetPorto-Novo lagoon
TitrePOPULATION DYNAMICS AND EXPLOITATION PARAMETERS OF CALLINECTES AMNICOLA (ROCHEBRUNE, 1883) IN THE LAGOON COMPLEXES OF SOUTH
TypeArticle

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