Does upwelling intensity determine larval fish habitats in upwelling ecosystems ? The case of Senegal and Mauritania

Autor: Maik Tiedemann, Julian Döring, Christian Möllmann, Heino O. Fock, Patrice Brehmer
Přispěvatelé: Thünen Institute, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD), Institut Sénégalais de Recherches Agricoles [Dakar] (ISRA), Leibniz Centre for Tropical Marine Research (ZMT), Center for Earth System Research and Sustainability (CEN), Universität Hamburg (UHH), European Project: 603521,EC:FP7:ENV,FP7-ENV-2013-two-stage,PREFACE(2013), Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2017
Předmět:
0106 biological sciences
sardine sardina-pilchardus
Sardinella aurita
010504 meteorology & atmospheric sciences
Effects of global warming on oceans
Canary current large marine ecosystem
Aquatic Science
Biology
Oceanography
01 natural sciences
recruitment success
generalized additive models
Round sardinella
14. Life underwater
Sardinella
satellite-observations
Sardina pilchardus
0105 earth and related environmental sciences
geography
geography.geographical_feature_category
spanish sardine
upwelling index
optimal environmental window
Northwest Africa
Ecology
Continental shelf
010604 marine biology & hydrobiology
ACL
Sardine
small pelagic fish
Pelagic zone
Ichthyoplankton
biology.organism_classification
fish larvae
eastern boundary
Upwelling
west-africa
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
sea-surface
anchovy engraulis-encrasicolus
Canary Current Large Marine Ecosystem
Zdroj: Fisheries Oceanography
Fisheries Oceanography, 2017, 26 (6), pp.655-667. ⟨10.1111/fog.12224⟩
Fisheries Oceanography, Wiley, 2017, 26 (6), pp.655-667. ⟨10.1111/fog.12224⟩
ISSN: 1054-6006
1365-2419
Popis: WOS:000412425500005; International audience; European sardine (Sardina pilchardus) and round sardinella (Sardinella aurita) comprise two-thirds of total landings of small pelagic fishes in the Canary Current Eastern Boundary Ecosystem (CCEBE). Their spawning habitat is the continental shelf where upwelling is responsible for high productivity. While upwelling intensity is predicted to change through ocean warming, the effects of upwelling intensity on larval fish habitat expansion is not well understood. Larval habitat characteristics of both species were investigated during different upwelling intensity regimes. Three surveys were carried out to sample fish larvae during cold (permanent upwelling) and warm (low upwelling) seasons along the southern coastal upwelling area of the CCEBE (13 degrees-22.5 degrees N). Sardina pilchardus larvae were observed in areas of strong upwelling during both seasons. Larval habitat expansion was restricted from 22.5 degrees N to 17.5 degrees N during cold seasons and to 22.5 degrees N during the warm season. Sardinella aurita larvae were observed from 13 degrees N to 15 degrees N during cold seasons and 16-21 degrees N in the warm season under low upwelling conditions. Generalized additive models predicted upwelling intensity driven larval fish abundance patterns. Observations and modeling revealed species-specific spawning times and locations, that resulted in a niche partitioning allowing species' co-existence. Alterations in upwelling intensity may have drastic effects on the spawning behavior, larval survival, and probably recruitment success of a species. The results enable insights into the spawning behavior of major small pelagic fish species in the CCEBE. Understanding biological responses to physical variability are essential in managing marine resources under changing climate conditions.
Databáze: OpenAIRE
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