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Influence of Green Tides in Coastal Nursery Grounds on the Habitat Selection and Individual Performance of Juvenile Fish
article dans des revues - 2017-01-26
Luherne, Emilie Le, et al.
Titre Influence of Green Tides in Coastal Nursery Grounds on the Habitat Selection and Individual Performance of Juvenile Fish Type d'Ã©tude article dans des revues Auteurs personnes Luherne Emilie Le Auteur Pape Olivier Le Auteur Murillo Laurence Auteur Randon Marine Auteur Lebot ClÃ©ment Auteur RÃ©veillac Elodie Auteur Ãcologie et santÃ© des Ã©cosystÃ¨mes (ESE) ; Institut National de la Recherche Agronomique (INRA) - Agrocampus Ouest CollectivitÃ© Ã©ditrice Date de publication 2017-01-26 Editeur(s) [S.l.] : Public Library of Science
[S.l.] : HAL CCSD
PLOS ONE vol.12 nÂ°1 RÃ©sumÃ© Coastal ecosystems, which provide numerous essential ecological functions for fish, are threatened by the proliferation of green macroalgae that significantly modify habitat conditions in intertidal areas. Understanding the influence of green tides on the nursery function of these ecosystems is essential to determine their potential effects on fish recruitment success. In this study, the influence of green tides on juvenile fish was examined in an intertidal sandy beach area, the Bay of Saint-Brieuc (Northwestern France), during two annual cycles of green tides with varying levels of intensity. The responses of three nursery-dependent fish species, the pelagic Sprattus sprattus (L.), the demersal Dicentrarchus labrax (L.) and the benthic Pleuronectes platessa L., were analysed to determine the effects of green tides according to species-specific habitat niche and behaviour. The responses to this perturbation were investigated based on habitat selection and a comparison of individual performance between a control and an impacted site. Several indices on different integrative scales were examined to evaluate these responses (antioxidant defence capacity, muscle total lipid, morphometric condition and growth). Based on these analyses, green tides affect juvenile fish differently according to macroalgal density and species-specific tolerance, which is linked to their capacity to move and to their distribution in the water column. A decreasing gradient of sensitivity was observed from benthic to demersal and pelagic fish species. At low densities of green macroalgae, the three species stayed at the impacted site and the growth of plaice was reduced. At medium macroalgal densities, plaice disappeared from the impacted site and the growth of sea bass and the muscle total lipid content of sprat were reduced. Finally, when high macroalgal densities were reached, none of the studied species were captured at the impacted site. Hence, sites affected by green tides are less favourable nursery grounds for all the studied species, with species-specific effects related to macroalgal density. CatÃ©gories thÃ©matiques alguemarÃ©e vertezone cÃ´tiÃ¨rezone intertidalelittoral Mots-clÃ©s libres algue verte/Antioxidants/Ã©cosystÃ¨me du littoral/Fish physiology/Habitats/Lipids/macroalgue/macroalgues/Marine fish/Morphometry/Otolith/Tides Echelle de territoire baies et rades Note DOI = 10.1371/journal.pone.0170110.
Article dans la revue "PLoS ONE" Ã©ditÃ©e par la Public Library of Science (ISSN : 1932-6203) en 2017 volume 12 nÂ°1, doi = 10.1371/journal.pone.0170110.
Langue(s) Anglais Document en ligne https://hal.archives-ouvertes.fr/hal-01449302 Localisation du document AccÃ¨s au texte intÃ©gral disponible en ligne sur le site de la revue =http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0170110 NÂ° d'Ã©dition (ISBN, DOI,...) 10.1371/journal.pone.0170110 Permalink http://etudes.bretagne-environnement.org/index.php?lvl=notice_display&id=159812