Modelling the effect of food availability on recruitment success of Cape anchovy ichthyoplankton in the southern Benguela upwelling system

  • V Koné
  • C Lett
  • P Fréon

Abstract

Cape anchovy Engraulis encrasicolus adapted its reproductive strategies to the southern Benguela system by spawning over the Agulhas Bank, an area of low productivity that is located upstream of the predominant upwelling system. Frontal jet currents transport eggs and larvae toward the west coast of South Africa, where recruitment takes place. To characterise the recruitment dynamics of Cape anchovy ichthyoplankton, we used an individual-based model forced by a coupled hydrodynamic–biogeochemical model. The results show the importance of food (especially diatoms and copepods) dynamics on the spatial and temporal patterns of recruitment success, and also confirm the importance of the spawning area, timing and water depth on the recruitment success of Cape anchovy larvae.

Keywords: 3-D modelling, IBM model, pelagic ecosystem

African Journal of Marine Science 2013, 35(2): 151–161

Author Biographies

V Koné
Département d’Environnement, Centre de Recherches Océanologiques (CRO), 29 Rue des Pêcheurs, BPV 18, Abidjan, Côte d’Ivoire
C Lett
Institut de Recherche pour le Développement (IRD) – UMI 209 UMMISCO, Centre de Recherche Halieutique Méditerranéenne et Tropicale (CRHMT), Avenue Jean Monnet BP 171 – 34203, Sète, France
P Fréon
Institut de Recherche pour le Développement (IRD) – UMR 212 EME, Centre de Recherche Halieutique Méditerranéenne et Tropicale (CRHMT), Avenue Jean Monnet BP 171 – 34203, Sète, France
Published
2013-08-05
Section
Articles

Journal Identifiers


eISSN: 1814-2338
print ISSN: 1814-232X