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Tracking, feather moult and stable isotopes reveal foraging behaviour of a critically endangered seabird during the non-breeding season 5
Meier, Rhiannon E.; Votier, Stephen C.; Wynn, Russell B.; Guilford, Tim; Mcminn Grive, Miguel; Rodriguez, Ana; Newton, Jason; Maurice, Louise; Chouvelon, Tiphaine; Dessier, Aurelie; Trueman, Clive N..
Aim The movement patterns of marine top predators are likely to reflect responses to prey distributions, which themselves can be influenced by factors such as climate and fisheries. The critically endangered Balearic shearwater Puffinus mauretanicus has shown a recent northwards shift in non-breeding distribution, tentatively linked to changing forage fish distribution and/or fisheries activity. Here, we provide the first information on the foraging ecology of this species during the non-breeding period. Location Breeding grounds in Mallorca, Spain, and non-breeding areas in the north-east Atlantic and western Mediterranean. Methods Birdborne geolocation was used to identify non-breeding grounds. Information on feather moult (from digital images) and...
Tipo: Text Palavras-chave: Balearic shearwater; Diet; Discards; Feeding ecology; Fisheries; Migration; Trophic.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00358/46912/46817.pdf
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Etude des nourriceries de la Baie de Seine orientale et de l'estuaire de la Seine 5
Morin, Jocelyne; Riou, Philippe; Bessineton, Christophe; Vedieu, Christophe; Lemoine, Michel; Simon, Serge; Le Pape, Olivier.
This study, carried out from 1995 to 1997, within the framework of "Le Havre" harbour extension project, concerned halieutic populations and the characterization of a coastal nursery in the oriental part of the Seine bay and the Seine estuary . The main objective was to describe the specific and demographic composition of marine populations and their spatio-temporal distribution, and so assess the biological and halieutic role of this area. This study also included a research about the dietary needs of fish juveniles living in the estuary. Autumn and winter surveys results show that the estuary and area under direct influence are the richest from a biological and halieutic point of view. The mouth estuary isthe richest area in terms of diversity of...
Tipo: Text Palavras-chave: Bay of Seine; Estuary; Food; Trophic; Juvenile; Nursery; Baie de Seine; Estuaire; Alimentation; Trophique; Juvénile; Nourricerie.
Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/rapport-1507.pdf
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Stable isotope ratios in bentho-demersal biota along a depth gradient in the bay of biscay: A multitrophic study 5
Schaal, Gauthier; Nerot, Caroline; Grall, Jacques; Chouvelon, Tiphaine; Lorrain, Anne; Mortillaro, Jean-michel; Savoye, Nicolas; Brind'Amour, Anik; Paulet, Yves-marie; Le Bris, Herve.
Although stable isotope ratios are increasingly used to investigate the trophic ecology of marine organisms, their spatial variations are still poorly understood in the coastal environment. In this study, we measured the stable isotope composition (δ13C, δ15N) of suspended particulate organic matter (SPOM) (primary producer), a suspension feeder, the great scallop Pecten maximus (primary consumer), megabenthic decapods and benthic fishes (secondary consumers) along a depth gradient (from 5m to 155m depth) across the continental shelf of the Bay of Biscay. Although the three trophic levels exhibited similar δ13C patterns along the gradient, the δ15N patterns varied between SPOM, scallops and carnivores. The δ15N difference between SPOM and scallops...
Tipo: Text Palavras-chave: Trophic; Coastal; Bivalves; Food web; Bay of Biscay.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00288/39921/38481.pdf
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