From egg production to recruits: connectivity and inter-annual variability in the recruitment patterns of European anchovy in the northwestern Mediterranean
|Author(s)||Ospina-Alvarez Andres1, 2, Catalan Ignacio A.3, Bernal Miguel4, Roos David5, Palomera Isabel2|
|Affiliation(s)||1 : Pontificia Univ Catolica Chile, Ctr Marine Conservat, Dept Ecol, Fac Biol Sci, Santiago, Chile.
2 : CSIC, Inst Marine Sci ICM, Dept Renewable Marine Resources, E-08003 Barcelona, Spain.
3 : UIB, CSIC, Mediterranean Inst Adv Studies IMEDEA, Dept Ecol & Marine Resources, Esporles 07190, Balearic Island, Spain.
4 : Inst Espanol Oceanog, Ctr Oceanog Cadiz, Cadiz 11006, Spain.
5 : IFREMER, UMR EME 212, F-34203 Sete, France.
|Source||Progress In Oceanography (0079-6611) (Pergamon-elsevier Science Ltd), 2015-11 , Vol. 138 , P. 431-447|
|WOS© Times Cited||11|
|Note||FP6 SARDONE (44294) Special issue : Combining Modeling and Observations to Better Understand Marine Ecosystem Dynamics|
|Abstract||We show the application of a Spatially-Explicit Individual-Based Model (SEIBM) to understand the recruitment process of European anchovy. The SEIBM is applied to simulate the effects of inter-annual variability in parental population spawning behavior and intensity, and ocean dynamics, on the dispersal of eggs and larvae from the spawning area in the Gulf of Lions (GoL) towards the coastal nursery areas in the GoL and Catalan Sea (northwestern Mediterranean Sea). For each of seven years (2003-2009), we initialize the SEIBM with the real positions of anchovy eggs during the spawning peak, from an acoustics-derived eggs production model. We analyze the effect of spawners’ distribution, timing of spawning, and oceanographic conditions on the connectivity patterns, growth, dispersal distance and late-larval recruitment (14 mm larva recruits, R14) patterns. The area of influence of the Rhône plume was identified as having a high probability of larval recruitment success (64%), but up to 36% of R14 larvae end up in the Catalan Coast. We demonstrate that the spatial paths of larvae differ dramatically from year to year, and suggest potential offshore nursery grounds. We showed that our simulations are coherent with existing recruitment proxies and therefore open new possibilities for fisheries management.|