Population Dynamics of the Common Cuttlefish Sepia Officinalisfrom the Coastal Water of Côte d’Ivoire
Journal Title: Haya: The Saudi Journal of Life Sciences - Year 2016, Vol 1, Issue 4
Abstract
Abstract: Population parameters such as asymptotic length (L∞), growth coefficient (K), mortality rates (Z, F and M), exploitation level (E) and recruitment pattern of the common cuttlefish Sepia officinaliswere estimated using length–frequency data from the Ivorian coastal water. Asymptotic length (L∞) was 31.50 cm and growth coefficient (K) was estimated at 0.500 year−1. Total mortality (Z) for S. officinaliswas 1.32 year−1, while natural mortality (M) and fishing mortality (F) were 0.94 and 0.38 year−1, respectively. The growth performance index (φ’) was 2.69 and the exponent “b” of the length–weight relationship was 2.77 during the study period. The asymptotic wet weight estimated from length–weight relationship was 2869.57 g. Exploitation level (E) of Sepia officinaliswas 0.29. The recruitment pattern was continuous with one major peak in the months of July–August. The exploitation level (0.29) and lower fishing mortality (0.38 year−1) indicate that the common cuttlefish is under-exploited from Ivorian coastal waters. Keywords: population dynamics, Sepia officinalis, length–weight relationship, Côte d’Ivoire.
Authors and Affiliations
AkesseEkumou Valeri, Karamoko Mamadou, KouakouFokouoKessia Irene, Otchoumou Atcho
Keywords
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