Campagnes pelgas : dynamique des petits poissons pélagiques et relations trophiques avec les autres compartiments de l’écosystème pélagique du golfe de Gascogne / Tiphaine Chouvelon in Ar Vran, vol. 24 n°2 (2013)

Public ISBD Faire une suggestion d'achat [article]  inAr Vran > vol. 24 n°2 (2013) . - pp. 37-41 Titre : Campagnes pelgas : dynamique des petits poissons pélagiques et relations trophiques avec les autres compartiments de l’écosystème pélagique du golfe de Gascogne Type de document : texte imprimé Auteurs : Tiphaine Chouvelon, Auteur ; Jacques Massé, Auteur ; Jérôme Spitz, Auteur ; Ghislain Dorémus, Auteur Année de publication : 2013 Article en page(s) : pp. 37-41 Langues : Français (fre) Mots-clés : campagne océanographique Résumé : PELGAS surveys: small pelagic fish dynamics and trophic relationships with other compartments of the pelagic ecosystem of the Bay of Biscay Ecosystemic PELGAS surveys occur each year in spring in the Bay of Biscay (North-East Atlantic) since 2000. The first objective was to assess small pelagic fish resources in a management point of view, particularly for European anchovy which is managed by Total Allowable Catch (TAC). Nevertheless, the wide panel of parameters and data collected during PELGAS surveys allows a direct use of them in the frame of the international request for the European Marine Strategy Framework Directive (MSFD), notably for producing indicators of the Bay of Biscay pelagic ecosystem’s ecological state. Current objectives of Pelgas surveys are thus multiple. In total, four teams work together on board, allowing all compartments of the ecosystem to be studied, and the sampling strategy covers the same transect network each year (Fig. 1). Along the temporal series, it has been highlighted strong variations in abundance and distribution for most of pelagic fish species, probably linked to recruitment for short-lived species (e.g. anchovy) and/or to migration patterns (e.g. sardine). However, no obvious controlling factors have been evidenced yet for explaining general fluctuations in the small pelagic fish community in the area, as well as the impact of such fluctuations on their predators (e.g. seabirds, marine mammals, large fish). There is then a crucial need today to improve studies of linkages and interactions between compartments from data collected during Pelgas surveys, such as between plankton and pelagic fish (e.g. Chouvelon et al. under review) or between fish and their predators (e.g. Certain et al. 2011), especially now that more than 10 years temporal series of data are available for each compartment of the pelagic ecosystem. However concerning top predators, if the trophic ecology of the principal cetacean species in the Bay of Biscay is well known (notably through stranded animals, e.g. Spitz et al. 2006), very little is known about seabirds’ trophic ecology and pelagic fish consumption in the area. A better knowledge of seabirds diet in this peculiar area is therefore needed for conservation issues concerning seabirds. Type de document : Périodique Permalink : https://pmb.bretagne-vivante.org/pmb/opac_css/index.php?lvl=notice_display&id=64 [article] Campagnes pelgas : dynamique des petits poissons pélagiques et relations trophiques avec les autres compartiments de l’écosystème pélagique du golfe de Gascogne [texte imprimé] / Tiphaine Chouvelon, Auteur ; Jacques Massé, Auteur ; Jérôme Spitz, Auteur ; Ghislain Dorémus, Auteur . - 2013 . - pp. 37-41. Langues : Français (fre) in Ar Vran > vol. 24 n°2 (2013) . - pp. 37-41 Mots-clés : campagne océanographique Résumé : PELGAS surveys: small pelagic fish dynamics and trophic relationships with other compartments of the pelagic ecosystem of the Bay of Biscay Ecosystemic PELGAS surveys occur each year in spring in the Bay of Biscay (North-East Atlantic) since 2000. The first objective was to assess small pelagic fish resources in a management point of view, particularly for European anchovy which is managed by Total Allowable Catch (TAC). Nevertheless, the wide panel of parameters and data collected during PELGAS surveys allows a direct use of them in the frame of the international request for the European Marine Strategy Framework Directive (MSFD), notably for producing indicators of the Bay of Biscay pelagic ecosystem’s ecological state. Current objectives of Pelgas surveys are thus multiple. In total, four teams work together on board, allowing all compartments of the ecosystem to be studied, and the sampling strategy covers the same transect network each year (Fig. 1). Along the temporal series, it has been highlighted strong variations in abundance and distribution for most of pelagic fish species, probably linked to recruitment for short-lived species (e.g. anchovy) and/or to migration patterns (e.g. sardine). However, no obvious controlling factors have been evidenced yet for explaining general fluctuations in the small pelagic fish community in the area, as well as the impact of such fluctuations on their predators (e.g. seabirds, marine mammals, large fish). There is then a crucial need today to improve studies of linkages and interactions between compartments from data collected during Pelgas surveys, such as between plankton and pelagic fish (e.g. Chouvelon et al. under review) or between fish and their predators (e.g. Certain et al. 2011), especially now that more than 10 years temporal series of data are available for each compartment of the pelagic ecosystem. However concerning top predators, if the trophic ecology of the principal cetacean species in the Bay of Biscay is well known (notably through stranded animals, e.g. Spitz et al. 2006), very little is known about seabirds’ trophic ecology and pelagic fish consumption in the area. A better knowledge of seabirds diet in this peculiar area is therefore needed for conservation issues concerning seabirds. Type de document : Périodique Permalink : https://pmb.bretagne-vivante.org/pmb/opac_css/index.php?lvl=notice_display&id=64

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