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Auteur Gruss, A.; Kaplan, D.; Guenette, S.; Roberts, C.M.; Botsford, L.W. url  doi
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  Titre Consequences of adult and juvenile movement for marine protected areas Type Article scientifique
  Année 2011 Publication Revue Abrégée Biological Conservation  
  Volume 144 Numéro Pages 692-702  
  Mots-Clés areas; Density-dependent; Density-independent; Dynamic; marine; movement; (MPAs); MPAs; protected; Spillover; Targeted  
  Résumé Adult and juvenile mobility has a considerable influence on the functioning of marine protected areas. It is recognized that adult and juvenile movement reduces the core benefits of protected areas, namely protecting the full age-structure of marine populations, while at the same time perhaps improving fisheries yield over the no-reserve situation through export of individuals from protected areas. Nevertheless, the study of the consequences of movement on protected area functioning is unbalanced. Significant attention has been paid to the influence of certain movement patterns, such as diffusive movement and home ranges, while the impacts of others, such as density-dependent movements and ontogenetic migrations, have been relatively ignored. Here we review the diversity of density-independent and density-dependent movement patterns, as well as what is currently known about their consequences for the conservation and fisheries effects of marine protected areas. We highlight a number of 'partially addressed' issues in marine protected area research, such as the effects of reserves targeting specific life phases, and a number of essentially unstudied issues, such as density-dependent movements, nomadism, ontogenetic migrations, behavioral polymorphism and 'dynamic' reserves that adjust location as a realtime response to habitat changes. Assessing these issues will be essential to creating effective marine protected area networks for mobile species and accurately assessing reserve impacts on these species.  
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  ISSN (up) 0006-3207 ISBN Médium  
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  Numéro d'Appel LL @ pixluser @ collection 141  
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Auteur van Gils, J.A.; van der Geest, M.; De Meulenaer, B.; Gillis, H.; Piersma, T.; Folmer, E.O. url  doi
openurl 
  Titre Moving on with foraging theory: incorporating movement decisions into the functional response of a gregarious shorebird Type Article scientifique
  Année 2015 Publication Revue Abrégée Journal of Animal Ecology  
  Volume 84 Numéro Pages 554-564  
  Mots-Clés competition continuous-time Markov chain cryptic interference diet distribution habitat choice intake rate movement ecology predation toxic prey SPATIAL-DISTRIBUTION RED KNOTS MODELING INTERFERENCE CRYPTIC INTERFERENCE STOCHASTIC VERSION BEHAVIORAL ECOLOGY MULTISTATE MODELS BANC-DARGUIN GROUP-SIZE PREY Ecology Zoology  
  Résumé 1. Models relating intake rate to food abundance and competitor density (generalized functional response models) can predict forager distributions and movements between patches, but we lack understanding of how distributions and small-scale movements by the foragers themselves affect intake rates. Using a state-of-the-art approach based on continuous-time Markov chain dynamics, we add realism to classic functional response models by acknowledging that the chances to encounter food and competitors are influenced by movement decisions, and, vice versa, that movement decisions are influenced by these encounters. We used a multi-state modelling framework to construct a stochastic functional response model in which foragers alternate between three behavioural states: searching, handling and moving. Using behavioural observations on a molluscivore migrant shorebird (red knot, Calidris canutus canutus), at its main wintering area (Banc d'Arguin, Mauritania), we estimated transition rates between foraging states as a function of conspecific densities and densities of the two main bivalve prey. Intake rate decreased with conspecific density. This interference effect was not due to decreased searching efficiency, but resulted from time lost to avoidance movements. Red knots showed a strong functional response to one prey (Dosinia isocardia), but a weak response to the other prey (Loripes lucinalis). This corroborates predictions from a recently developed optimal diet model that accounts for the mildly toxic effects due to consuming Loripes. Using model averaging across the most plausible multi-state models, the fully parameterized functional response model was then used to predict intake rate for an independent data set on habitat choice by red knot. Comparison of the sites selected by red knots with random sampling sites showed that the birds fed at sites with higher than average Loripes and Dosinia densities, that is sites for which we predicted higher than average intake rates. We discuss the limitations of Holling's classic functional response model which ignores movement and the limitations of contemporary movement ecological theory that ignores consumer-resource interactions. With the rapid advancement of technologies to track movements of individual foragers at fine spatial scales, the time is ripe to integrate descriptive tracking studies with stochastic movement-based functional response models.  
  Adresse [van Gils, Jan A.; van der Geest, Matthijs; De Meulenaer, Brecht; Gillis, Hanneke; Piersma, Theunis; Folmer, Eelke O.] NIOZ Royal Netherlands Inst Sea Res, Dept Marine Ecol, NL-1790 AB Den Burg, Texel, Netherlands. [van der Geest, Matthijs; Piersma, Theunis] Univ Groningen, Anim Ecol Grp, Ctr Ecol & Evolutionary Studies CEES, Chair Global Flyway Ecol, NL-9700 CC Groningen, Netherlands. van Gils, JA (reprint author), NIOZ Royal Netherlands Inst Sea Res, Dept Marine Ecol, POB 59, NL-1790 AB Den Burg, Texel, Netherlands. Jan.van.Gils@nioz.nl  
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  ISSN (up) 0021-8790 ISBN Médium  
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  Notes ISI Document Delivery No.: CB9RB Times Cited: 0 Cited Reference Count: 61 van Gils, Jan A. van der Geest, Matthijs De Meulenaer, Brecht Gillis, Hanneke Piersma, Theunis Folmer, Eelke O. NWO WOTRO [W.01.65.221.00]; NWO [R 84-639]; NWO VIDI [864.09.002] We thank Parc National du Banc d'Arguin (PNBA) for their hospitality, the hosting of our presence and the permission to work in and from the Iwik scientific station. Lemhaba ould Yarba made the logistic arrangements. Joop van Eerbeek, Erik J. Jansen, Han Olff and El-Hacen Mohamed El-Hacen helped collecting and sorting benthos samples. Valuable comments on the manuscript were given by Allert Bijleveld, Jaap van der Meer, Ola Olsson, Thomas Oudman, Isabel M. Smallegange, an anonymous referee and by the 'literature club' of the Centre for Integrative Ecology during JAvG's sabbatical at Deakin University. Dick Visser polished the figures. This work is supported by an NWO WOTRO Integrated Programme grant (W.01.65.221.00) to TP, an NWO travel grant (R 84-639) to EOF, and an NWO VIDI grant (864.09.002) to JAvG. 0 WILEY-BLACKWELL HOBOKEN J ANIM ECOL Approuvé pas de  
  Numéro d'Appel MARBEC @ alain.herve @ 1412 collection 1383  
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Auteur Sturrock, A.M.; Trueman, C.N.; Darnaude, A.M.; Hunter, E. url  doi
openurl 
  Titre Can otolith elemental chemistry retrospectively track migrations in fully marine fishes? Type Article scientifique
  Année 2012 Publication Revue Abrégée J. Fish Biol.  
  Volume 81 Numéro 2 Pages 766-795  
  Mots-Clés chemical fingerprint; geolocation; microchemistry; movement; natural; tag; trace metals  
  Résumé Otolith microchemistry can provide valuable information about stock structure and mixing patterns when the magnitude of environmental differences among areas is greater than the cumulative influence of any vital effects. Here, the current understanding of the underlying mechanisms governing element incorporation into the otolith is reviewed. Hard and soft acid and base (HSAB) theory is employed to explore the differences in chemical behaviours, distributions and affinities between elements. Hard acid cations (e.g. Mg2+, Li+ and Ba2+) tend to be less physiologically influenced and accepted more readily into the otolith crystal lattice but are relatively homogeneous in seawater. Soft acid cations (e.g. Zn2+ and Cu2+) on the other hand, exhibit more varied distributions in seawater, but are more likely to be bound to blood proteins and less available for uptake into the otolith. The factors influencing the geographical distribution of elements in the sea, and their incorporation into the otoliths of marine fishes are reviewed. Particular emphasis is placed on examining physiological processes, including gonad development, on the uptake of elements commonly used in population studies, notably Sr. Finally, case studies are presented that either directly or indirectly compare population structuring or movements inferred by otolith elemental fingerprints with the patterns indicated by additional, alternative proxies. The main obstacle currently limiting the application of otolith elemental microchemistry to infer movements of marine fishes appears to lie in the largely homogeneous distribution of those elements most reliably measured in the otolith. Evolving technologies will improve the discriminatory power of otolith chemistry by allowing measurement of spatially explicit, low level elements; however, for the time being, the combination of otolith minor and trace element fingerprints with alternative proxies and stable isotopic ratios can greatly extend the scope of migration studies. Among the otolith elements that routinely occur above instrument detection limits, Ba, Mn and Li were deemed the most likely to prove reliable geographic markers in marine species.  
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  ISSN (up) 0022-1112 ISBN Médium  
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  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 462  
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Auteur Coz, R.; Ouisse, V.; Artero, C.; Carpentier, A.; Crave, A.; Feunteun, E.; Olivier, J.M.; Perrin, B.; Ysnel, F. url  doi
openurl 
  Titre Development of a new standardised method for sustainable monitoring of the vulnerable pink sea fan Eunicella verrucosa Type Article scientifique
  Année 2012 Publication Revue Abrégée Marine Biology  
  Volume 159 Numéro 6 Pages 1375-1388  
  Mots-Clés atlantic canada; cavolini coelenterata octocorallia; channel; gonadal development; gorgonian paramuricea-clavata; marine invertebrate; mediterranean-sea; modular growth; movement; northeast; singularis esper; water  
  Résumé The aim of this survey was to test a standardised method to follow the demographic evolution of a dense aggregative 'forest' population of the temperate gorgonian Eunicella verrucosa (Octocorallia, Gorgoniidae) using in situ photographic recordings. Distribution, density, growth and demographic evolution of the colonies was compared along two parallel transects. Computer treatment allowed the estimation of the total branch fan surface area, and the individual growth of tagged colonies was determined by measuring the increase in this surface area, using consecutive photographs taken at two-year intervals. To integrate the potential bias of branch overlapping, we proposed a correction factor between the in situ photographic surface area and the surface area of the gorgonian calculated from ex situ photographic surface area with all branches deployed. The surface-frequency distribution of colonies was converted to estimated-age-frequency distribution using an estimated growth curve based on the net growth rate. The technique used revealed significant differences in population structure and the dynamics of gorgonian colonies, as the two transects appeared to be influenced by different environmental conditions. The recruitment also seemed to vary according to year and transect, resulting in different densities. Our work showed clear results in characterising the variations of gorgonian demographic evolution at a small spatial scale; thus, it is assumed that this method could be a sustainable tool for coastal environmental managers.  
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  ISSN (up) 0025-3162 ISBN Médium  
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  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 539  
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Auteur Queiroz, N.; Humphries, N.E.; Couto, A.; Vedor, M.; da Costa, I.; Sequeira, A.M.M.; Mucientes, G.; Santos, A.M.; Abascal, F.J.; Abercrombie, D.L.; Abrantes, K.; Acuna-Marrero, D.; Afonso, A.S.; Afonso, P.; Anders, D.; Araujo, G.; Arauz, R.; Bach, P.; Barnett, A.; Bernal, D.; Berumen, M.L.; Lion, S.B.; Bezerra, N.P.A.; Blaison, A.V.; Block, B.A.; Bond, M.E.; Bonfil, R.; Bradford, R.W.; Braun, C.D.; Brooks, E.J.; Brooks, A.; Brown, J.; Bruce, B.D.; Byrne, M.E.; Campana, S.E.; Carlisle, A.B.; Chapman, D.D.; Chapple, T.K.; Chisholm, J.; Clarke, C.R.; Clua, E.G.; Cochran, J.E.M.; Crochelet, E.C.; Dagorn, L.; Daly, R.; Cortes, D.D.; Doyle, T.K.; Drew, M.; Duffy, C.A.J.; Erikson, T.; Espinoza, E.; Ferreira, L.C.; Ferretti, F.; Filmalter, J.D.; Fischer, G.C.; Fitzpatrick, R.; Fontes, J.; Forget, F.; Fowler, M.; Francis, M.P.; Gallagher, A.J.; Gennari, E.; Goldsworthy, S.D.; Gollock, M.J.; Green, J.R.; Gustafson, J.A.; Guttridge, T.L.; Guzman, H.M.; Hammerschlag, N.; Harman, L.; Hazin, F.H.V.; Heard, M.; Hearn, A.R.; Holdsworth, J.C.; Holmes, B.J.; Howey, L.A.; Hoyos, M.; Hueter, R.E.; Hussey, N.E.; Huveneers, C.; Irion, D.T.; Jacoby, D.M.P.; Jewell, O.J.D.; Johnson, R.; Jordan, L.K.B.; Jorgensen, S.J.; Joyce, W.; Daly, C.A.K.; Ketchum, J.T.; Klimley, A.P.; Kock, A.A.; Koen, P.; Ladino, F.; Lana, F.O.; Lea, J.S.E.; Llewellyn, F.; Lyon, W.S.; MacDonnell, A.; Macena, B.C.L.; Marshall, H.; McAllister, J.D.; McAuley, R.; Meyer, M.A.; Morris, J.J.; Nelson, E.R.; Papastamatiou, Y.P.; Patterson, T.A.; Penaherrera-Palma, C.; Pepperell, J.G.; Pierce, S.J.; Poisson, F.; Quintero, L.M.; Richardson, A.J.; Rogers, P.J.; Rohner, C.A.; Rowat, D.R.L.; Samoilys, M.; Semmens, J.M.; Sheaves, M.; Shillinger, G.; Shivji, M.; Singh, S.; Skomal, G.B.; Smale, M.J.; Snyders, L.B.; Soler, G.; Soria, M.; Stehfest, K.M.; Stevens, J.D.; Thorrold, S.R.; Tolotti, M.T.; Towner, A.; Travassos, P.; Tyminski, J.P.; Vandeperre, F.; Vaudo, J.J.; Watanabe, Y.Y.; Weber, S.B.; Wetherbee, B.M.; White, T.D.; Williams, S.; Zarate, P.M.; Harcourt, R.; Hays, G.C.; Meekan, M.G.; Thums, M.; Irigoien, X.; Eguiluz, V.M.; Duarte, C.M.; Sousa, L.L.; Simpson, S.J.; Southall, E.J.; Sims, D.W. doi  openurl
  Titre Global spatial risk assessment of sharks under the footprint of fisheries Type Article scientifique
  Année 2019 Publication Revue Abrégée Nature  
  Volume 572 Numéro 7770 Pages 461-+  
  Mots-Clés bycatch; conservation; geolocation; improving light; model; movements; patterns; pelagic sharks; temperature; tracking  
  Résumé Effective ocean management and the conservation of highly migratory species depend on resolving the overlap between animal movements and distributions, and fishing effort. However, this information is lacking at a global scale. Here we show, using a big-data approach that combines satellite-tracked movements of pelagic sharks and global fishing fleets, that 24% of the mean monthly space used by sharks falls under the footprint of pelagic longline fisheries. Space-use hotspots of commercially valuable sharks and of internationally protected species had the highest overlap with longlines (up to 76% and 64%, respectively), and were also associated with significant increases in fishing effort. We conclude that pelagic sharks have limited spatial refuge from current levels of fishing effort in marine areas beyond national jurisdictions (the high seas). Our results demonstrate an urgent need for conservation and management measures at high-seas hotspots of shark space use, and highlight the potential of simultaneous satellite surveillance of megafauna and fishers as a tool for near-real-time, dynamic management.  
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  ISSN (up) 0028-0836 ISBN Médium  
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  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 2614  
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