Sole larval supply to coastal nurseries: Interannual variability and connectivity at interregional and interpopulation scales

Type Article
Date 2016-05
Language English
Author(s) Savina- MarieORCID1, Lunghi Mathias1, 2, Archambault B.2, Baulier LoicORCID2, 3, Huret MartinORCID3, Le Pape Olivier2
Affiliation(s) 1 : IFREMER, Channel & North Sea Fisheries Dept, 150 Quai Gambetta,BP 699, F-62321 Boulogne Sur Mer, France.
2 : AGROCAMPUS OUEST, ESE Ecol & Sante Ecosyst UMR985, F-35042 Rennes, France.
3 : IFREMER, STH LBH, BP 70, F-29280 Plouzane, France.
Source Journal Of Sea Research (1385-1101) (Elsevier Science Bv), 2016-05 , Vol. 111 , P. 1-10
DOI 10.1016/j.seares.2015.11.010
WOS© Times Cited 15
Note SI : Proceedings of the Ninth International Symposium on Flatfish Ecology Part II
Keyword(s) hydrodynamic model, individual-based model, larval supply, nursery grounds, recruitment variability, Solea solea, metapopulation, English Channel, Bay of Biscay, southern North Sea
Abstract Simulating fish larval drift helps assess the sensitivity of recruitment variability to early life history. An individual-based model (IBM) coupled to a hydrodynamic model was used to simulate common sole larval supply from spawning areas to coastal and estuarine nursery grounds at the meta-population scale (4 assessed stocks), from the southern North Sea to the Bay of Biscay (Western Europe) on a 26-yr time series, from 1982 to 2007. The IBM allowed each particle released to be transported by currents, to grow depending on temperature, to migrate vertically depending on development stage, to die along pelagic stages or to settle successfully on a nursery, representing the life history from spawning to metamorphosis. The model outputs were analysed to explore interannual patterns in the amounts of settled sole larvae at the population scale; they suggested: (i) a low connectivity between populations at the larval stage, (ii) a moderate influence of interannual variation in the spawning biomass, (iii) dramatic consequences of life history on the abundance of settling larvae and (iv) the effects of climate variability on the interannual variability of the larvae settlement success.
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