Dynamique De La Population De La Crevette D’eau Douce Atya Scabra (Leach, 1815) (Decapoda: Atyidae) Dans La Rivière Bia, Région Du Sud-Comoé (Côte d’Ivoire)

  • Vincent Kadjo Laboratoire de Biologie et Cytologie Animales, UFR-SN, Université Nangui Abrogoua (Ex-Université d’Abobo-Adjamé), 02 BP 801 Abidjan 02, Côte d’Ivoire
  • Assoi O. Etchian Laboratoire de Biologie et Cytologie Animales, UFR-SN, Université Nangui Abrogoua (Ex-Université d’Abobo-Adjamé), 02 BP 801 Abidjan 02, Côte d’Ivoire
  • Jean-Noel Yapi Laboratoire de Biologie et Cytologie Animales, UFR-SN, Université Nangui Abrogoua (Ex-Université d’Abobo-Adjamé), 02 BP 801 Abidjan 02, Côte d’Ivoire
  • Atcho Otchoumou Laboratoire de Biologie et Cytologie Animales, UFR-SN, Université Nangui Abrogoua (Ex-Université d’Abobo-Adjamé), 02 BP 801 Abidjan 02, Côte d’Ivoire
  • Aka Jean-Paul Agnissan Laboratoire d’Environnement et de Biologie Aquatique, UFR-SGE, Université Nangui Abrogoua (Ex-Université d’Abobo-Adjamé), 02 BP 801Abidjan 02, Côte d’Ivoire
  • Melecony C. Blé Centre de Recherches Océanologiques, Département Aquaculture, BP V 18 Abidjan, Côte d’Ivoire

Abstract

The parameters of growth, mortality, the exploitation and the recruitment of Atya scabra (Leach, 1815) as traditionally fished in the Bia river, were studied. These parameters were determined from the size frequencies by the FiSAT II software. The results obtained at the specimens of Aboisso were:= 156,45 mm, K = 1,50 year -1, Φ' = 4,56, Z = 5,72 year -1, M = 1,48 year -1, F = 4,24 year -1 and E = 0,74 year -1. In Biaka, theestimated values were: L = 140,7 mm, K = 0,68 year -1, Φ' = 4,13, Z = 1,52year -1, M = 0,91 year -1, F = 0,61 year -1 and E = 0,40 year -1 . Aboisso specimens have a higher growth performance index (Φ') than Biaka's and a weak longevity (tmax = 2 years) compared to Biaka (tmax = 4.41 years). Shrimps are under exploited in the locality of Biaka (E 0.5). Total mortality is higher in Aboisso than in Biaka. However, the survival rate recorded in Aboisso (S = 0.003 years) is lower than that of Biaka (S = 0.22 years). Recruitment is continuous throughout the year, with two peaks (a major peak in September and a minor peak in February) in Aboisso. As for Biaka, the presence of a normal distribution indicates that recruitment is single. These results will serve as a database for rational management of A. scabra.

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Published
2017-04-30
How to Cite
Kadjo, V., Etchian, A. O., Yapi, J.-N., Otchoumou, A., Agnissan, A. J.-P., & Blé, M. C. (2017). Dynamique De La Population De La Crevette D’eau Douce Atya Scabra (Leach, 1815) (Decapoda: Atyidae) Dans La Rivière Bia, Région Du Sud-Comoé (Côte d’Ivoire). European Scientific Journal, ESJ, 13(12), 84. https://doi.org/10.19044/esj.2017.v13n12p84