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Auteur (up) Gimenez, O.; Buckland, S.T.; Morgan, B.J.T.; Bez, N.; Bertrand, S.; Choquet, R.; Dray, S.; Etienne, M.-P.; Fewster, R.; Gosselin, F.; Mérigot, B.; Monestiez, P.; Morales, J.M.; Mortier, F.; Munoz, F.; Ovaskainen, O.; Pavoine, S.; Pradel, R.; Schurr, F.M.; Thomas, L.; Thuiller, W.; Trenkel, V.; Valpine, P. de; Rexstad, E. url  doi
openurl 
  Titre Statistical ecology comes of age Type Article scientifique
  Année 2014 Publication Revue Abrégée Biology Letters  
  Volume 10 Numéro 12 Pages 20140698  
  Mots-Clés  
  Résumé The desire to predict the consequences of global environmental change has been the driver towards more realistic models embracing the variability and uncertainties inherent in ecology. Statistical ecology has gelled over the past decade as a discipline that moves away from describing patterns towards modelling the ecological processes that generate these patterns. Following the fourth International Statistical Ecology Conference (1–4 July 2014) in Montpellier, France, we analyse current trends in statistical ecology. Important advances in the analysis of individual movement, and in the modelling of population dynamics and species distributions, are made possible by the increasing use of hierarchical and hidden process models. Exciting research perspectives include the development of methods to interpret citizen science data and of efficient, flexible computational algorithms for model fitting. Statistical ecology has come of age: it now provides a general and mathematically rigorous framework linking ecological theory and empirical data.  
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  ISSN 1744-9561, 1744-957x ISBN Médium  
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  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1213  
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Auteur (up) Grande, M.; Murua, H.; Zudaire, I.; Goni, N.; Bodin, N. url  doi
openurl 
  Titre Reproductive timing and reproductive capacity of the Skipjack Tuna (Katsuwonus pelamis) in the western Indian Ocean Type Article scientifique
  Année 2014 Publication Revue Abrégée Fisheries Research  
  Volume 156 Numéro Pages 14-22  
  Mots-Clés Condition; Gonadosomatic index; Oocyte; Reproductive capacity; Spawning season  
  Résumé We studied the sexual maturity, batch fecundity and spawning season of the Skipjack Tuna Katsuwonus pelamis. Generalized additive modelling was applied to assess the effect of demographic features on ovary growth. During 2009 and 2010, 673 females were caught on board a purse-seine fishing vessel in the western Indian Ocean. Fish were classified into different reproductive phases and this information was used to determine the size at maturity (L-50), the timing of spawning and the batch fecundity (n = 51). The size at maturity (L-50) for females was estimated to be 39.9 cm. The mean relative batch fecundity was 140 +/- 64 eggs g(-1) of fish. Spawning occurs during the monsoons and inter-monsoon seasons with peaks in the reproductive activity during the North-east and South-west monsoon events. Demographic differences were detected in the reproductive timing of the population and a large investment in gamete production was observed in fish with high hepatic condition and in their first spawning year.  
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  ISSN 0165-7836 ISBN Médium  
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  Notes Approuvé pas de  
  Numéro d'Appel LL @ pixluser @ collection 360  
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Auteur (up) Gutowsky, S.E.; Tremblay, Y.; Kappes, M.A.; Flint, E.N.; Klavitter, J.; Laniawe, L.; Costa, D.P.; Naughton, M.B.; Romano, M.D.; Shaffer, S.A. url  doi
openurl 
  Titre Divergent post-breeding distribution and habitat associations of fledgling and adult black-footed Albatrosses Phoebastria nigripes in the North Pacific Type Article scientifique
  Année 2014 Publication Revue Abrégée Ibis  
  Volume 156 Numéro 1 Pages 60-72  
  Mots-Clés dispersal; geolocators; habitat use; Juvenile; Procellariiform; satellite telemetry; seabird  
  Résumé Past tracking studies of marine animals have primarily targeted adults, biasing our understanding of at-sea habitat use toward older life stages. Anthropogenic threats persist throughout the at-sea ranges of all life stages and it is therefore of interest to population ecologists and managers alike to understand spatiotemporal distributions and possible niche differentiation between age-classes. In albatrosses, particularly little is known about the juvenile life stage when fledglings depart the colonies and venture to sea with no prior experience or parental guidance. We compared the dispersal of 22 fledgling Black-footed Albatross Phoebastria nigripes between 2006 and 2008 using satellite telemetry and 16 adults between 2008 and 2009 using geolocaters from Midway Atoll National Wildlife Refuge, Northwest Hawaiian Islands. Following tag deployment, all fledglings spent several days within the calm atoll waters, then travelled northward until reaching 750-900km from the colony. At this point, fledgling distributions approached the productive North Pacific Transition Zone (NPTZ). Rather than reaching the high chlorophyll a densities on the leading edge of this zone, however, fledglings remained in areas of low productivity in the subtropical gyre. In contrast, adult albatrosses from the same breeding colony did not utilize the NPTZ at this time of year but rather ranged throughout the highly productive northern periphery of the Pacific Ocean Basin among the shelf regions off Japan and the Aleutian Islands. The dichotomy in habitat use between fledglings and adults from Midway Atoll results in complete spatial segregation between age-classes and suggests ontogenetic niche separation in this species. This research fills a large knowledge gap in at-sea habitat use during a little known yet critical life stage of albatrosses, and contributes to a more comprehensive understanding of differential mortality pressure between age-classes and overall conservation status for the vulnerable Black-footed Albatross.  
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  ISSN 0019-1019 ISBN Médium  
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  Numéro d'Appel LL @ pixluser @ collection 329  
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Auteur (up) Hadjadji, I.; Frehi, H.; Ayada, L.; Abadie, E.; Collos, Y. url  doi
openurl 
  Titre A comparative analysis of Alexandrium catenella/tamarense blooms in Annaba Bay (Algeria) and Thau lagoon (France); phosphorus limitation as a trigger Type Article scientifique
  Année 2014 Publication Revue Abrégée Comptes Rendus Biologies  
  Volume 337 Numéro 2 Pages 117-122  
  Mots-Clés Algeria; Algérie; Efflorescences; France; Méditerranée; alexandrium catenella/tamarense; blooms; mediterranean  
  Résumé  
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  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
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  Volume de collection Numéro de collection Edition  
  ISSN 1631-0691 ISBN Médium  
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  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 397  
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Auteur (up) Hancke, L.; Roberts, M.J.; Ternon, J.-F. url  doi
openurl 
  Titre Surface drifter trajectories highlight flow pathways in the Mozambique Channel Type Article scientifique
  Année 2014 Publication Revue Abrégée Deep-Sea Research Part II.Topical Studies in Oceanography  
  Volume 100 Numéro No spécial Pages 27-37  
  Mots-Clés Frontal flow; Mesoscale eddies; Mozambique Channel; Surface circulation; Surface drifters  
  Résumé The pattern of surface circulation in the Mozambique Channel was elucidated from the trajectories of 82 satellite-tracked drifters over the period 2000-2010 and complementary satellite-derived altimetry. Overall, the trajectories indicated that anticyclonic activity was mostly observed on the western side of the Channel, with cyclonic activity being more prevalent in the east. A lack of eddy activity was noted in the southeast corner of the Channel (i.e. SW of Madagascar). Drifter behaviour illustrated that surface water from the Comoros Basin, entrained into anticyclonic eddies during formation, can be retained and isolated for months whilst being transported southwards through the Channel. During a tropical cyclone weather event, a drifter was observed to switch between counter-rotating eddies indicating that horizontal mixing of the Ekman layer does occur. The drifters also illustrated and emphasised the flow field and transport between eddies (i.e. the interstitial flow) in the Mozambique Channel. Despite the dominance of southward propagating anticyclones, drifters were able to move north and south through the Channel in the frontal flow field between eddies within periods of 51-207 days. Cross-channel transport in both directions between the Madagascan and Mozambique shelf regions was similarly observed, with time spans of 19-30 days. Surprisingly, drifters from the southern limb of the East Madagascar Current were transported westward across the channel to the Mozambique shelf. This transport was similarly facilitated by the frontal flow field between eddies. It is hypothesised that the frontal zones between eddies and interstitial waters play an important role in distributing biota in the Mozambique Channel.  
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  Editeur Lieu de Publication Éditeur Barlow, R.; Marsac, F.; Ternon, J.-F.; Roberts, M.  
  Langue Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 0967-0645 ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel LL @ pixluser @ collection 361  
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