bascule de visibilité Search & Display Options

Tout Sélectionner    Désélectionner
 |   | 
Détails
   print
  Enregistrements Liens
Auteur ARNAUD-HAOND, S.; MOALIC, Y.; HERNANDEZ-GARCIA, E.; EGUILUZ, V.M.; ALBERTO, F.; SERRAO, E.A.; DUARTE, C.M. url  openurl
  Titre Disentangling the Influence of Mutation and Migration in Clonal Seagrasses Using the Genetic Diversity Spectrum for Microsatellites Type Article scientifique
  Année 2014 Publication Revue Abrégée Journal Of Heredity  
  Volume 105 Numéro 4 Pages (down) 532-541  
  Mots-Clés clonality; genetic divergence; Genetic Diversity Spectrum; microsatellites; Seagrass; stepwise mutation  
  Résumé The recurrent lack of isolation by distance reported at regional scale in seagrass species was recently suggested to stem from stochastic events of large-scale dispersal. We explored the usefulness of phylogenetic information contained in microsatellite loci to test this hypothesis by using the Genetic Diversity Spectrum (GDS) on databases containing, respectively, 7 and 9 microsatellites genotypes for 1541 sampling units of Posidonia oceanica and 1647 of Cymodocea nodosa. The simultaneous increase of microsatellite and geographic distances that emerges reveals a coherent pattern of isolation by distance in contrast to the chaotic pattern previously described using allele frequencies, in particular, for the long-lived P. oceanica. These results suggest that the lack of isolation by distance, rather than the resulting from rare events of large-scale dispersal, reflects at least for some species a stronger influence of mutation over migration at the scale of the distribution range. The global distribution of genetic polymorphism may, therefore, result predominantly from ancient events of step-by-step (re)colonization followed by local recruitment and clonal growth, rather than contemporary gene flow. The analysis of GDS appears useful to unravel the evolutionary forces influencing the dynamics and evolution at distinct temporal and spatial scales by accounting for phylogenetic information borne by microsatellites, under an appropriate mutation model. This finding adds nuance to the generalization of the influence of large-scale dispersal on the dynamics of seagrasses.  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 0022-1503 ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1138  
Lien permanent pour cet enregistrement
 

 
Auteur ADJEROUD, M.; GUERECHEAU, A.; VIDAL-DUPIOL, J.; FLOT, J.-F.; ARNAUD-HAOND, S.; BONHOMME, F. url  openurl
  Titre Genetic diversity, clonality and connectivity in the scleractinian coral Pocillopora damicornis: a multi-scale analysis in an insular, fragmented reef system Type Article scientifique
  Année 2014 Publication Revue Abrégée Marine Biology  
  Volume 161 Numéro 3 Pages (down) 531-541  
  Mots-Clés  
  Résumé Clonality and genetic structure of the coral Pocillopora damicornis sensu lato were assessed using five microsatellites in 12 populations from four islands of the Society Archipelago (French Polynesia) sampled in June 2008. The 427 analysed specimens fell into 132 multilocus genotypes (MLGs), suggesting that asexual reproduction plays an important role in the maintenance of these populations. A haploweb analysis of ITS2 sequences of each MLG was consistent with all of them being conspecific. Genetic differentiation was detected both between and within islands, but when a single sample per MLG was included in the analyses, the populations turned out to be nearly panmictic. These observations provide further evidence of the marked variability in reproductive strategies and genetic structure of P. damicornis throughout its geographic range; comparison with results previously obtained for the congeneric species Pocillopora meandrina underlines the importance of life history traits in shaping the genetic structure of coral populations  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 0025-3162 ISBN Médium  
  Région Expédition Conférence  
  Notes The following values have no corresponding Zotero field:<br/>Author Address: Inst Rech Dev, Unite 227, CoReUs2, Noumea 98848, New Caledonia.<br/>Author Address: CORAIL, Lab Excellence, F-66860 Perpignan, France.<br/>Author Address: Univ Perpignan, CNRS, UMR 5244, F-66860 Perpignan, France.<br/>Author Address: Univ Perpignan, UMR 5244, F-66860 Perpignan, France.<br/>Author Address: Max Planck Inst Dynam & Self Org, D-37073 Gottingen, Germany.<br/>Author Address: Inst Francais Rech Exploitat Mer, UMR 212, F-34203 Sete, France.<br/>Author Address: Univ Montpellier 2, Inst Sci Evolut, CNRS, UMR 5554, F-34095 Montpellier 5, France.<br/>PB – Springer<br/> Approuvé pas de  
  Numéro d'Appel LL @ pixluser @ collection 341  
Lien permanent pour cet enregistrement
 

 
Auteur FROMENTIN, J.-M.; LOPUSZANSKI, D. url  openurl
  Titre Migration, residency, and homing of bluefin tuna in the western Mediterranean Sea Type Article scientifique
  Année 2014 Publication Revue Abrégée ICES Journal of Marine Science  
  Volume 71 Numéro 3 Pages (down) 510-518  
  Mots-Clés feeding area; front; marine protected area; pop-up archival tag; Spatial distribution; Thunnus thynnus  
  Résumé This study presents the results of an electronic tagging programme on mature Atlantic bluefin tuna (ABFT) that has been conducted since 2007 offshore of the French Mediterranean Coast. The spatial distributions of ABFT showed little year-to-year variation and the fish concentrated in a small area of the central northwestern Mediterranean, where they may stay for several months. The individual tracks display sinuous trajectories in this area, indicating the possibility of feeding behaviour. No fish went out to the North Atlantic, but several fish displayed some migration to the southern western Mediterranean Sea during winter and the central Mediterranean during the spawning season. The homing behaviour of one fish after a full year as well as the back and forth of several fish further indicates that this restricted feeding area is probably persistent from year to year. We hypothesize that this area could result from local enrichment due to permanent mesoscale oceanographic features related to the North Mediterranean Current and the North Balearic front. The option of a spatial management, through marine protected areas, for a highly migratory species, such as ABFT, thus deserves more careful consideration because those species displayed complex spatial dynamics (e.g. homing), and population structure (e.g. several subpopulations of different sizes).  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 1054-3139 ISBN Médium  
  Région Expédition Conférence  
  Notes The following values have no corresponding Zotero field:<br/>Author Address: IFREMER, UMR 212 EME, Avenue Jean Monnet, BP 171, 34203 Se`te, France<br/>Author Address: BGFCF, (Big Game Fishing Club France), Carry le Rouet 13620, France<br/>PB – Oxford university press<br/> Approuvé pas de  
  Numéro d'Appel LL @ pixluser @ collection 339  
Lien permanent pour cet enregistrement
 

 
Auteur BAUER, R.; Graewe, U.; Stepputtis, D.; Zimmermann, C.; Hammer, C. url  openurl
  Titre Identifying the location and importance of spawning sites of Western Baltic herring using a particle backtracking model Type Article scientifique
  Année 2014 Publication Revue Abrégée Ices Journal Of Marine Science  
  Volume 71 Numéro 3 Pages (down) 499-509  
  Mots-Clés backtracking; Baltic Sea; Clupea harengus; hatching sites; lagoon; larval transport; spring spawning  
  Résumé The recruitment success of some herring stocks fluctuates strongly, and apparently, success is often already determined during the early life stages, i.e. before metamorphosis. In studying the survival of early life stages and its affecting factors, particularly those during the egg stage, it is crucial to examine the processes at the spawning sites, which often cannot be explored directly. A recent decline in the recruitment of Western Baltic spring-spawning herring (WBSSH) increases the urgency of filling the knowledge gap for this stock, especially because one bottleneck in the recruitment seems to occur before hatching. We examined the successful 20032009 spawning sites of WBSSH in the main spawning ground, the Greifswalder Bodden lagoon. Instead of using common techniques such as diving or underwater videography, which are usually unsuitable for mapping large areas, we applied a model approach. We tracked herring larvae at length 610 mm, recorded by larval surveys during MarchJune of the respective years, back to their hatching sites using a Lagrangian particle backtracking model. We compared the spawning areas identified by the model with the results of earlier field studies; however, we also analysed variations between years, larval length groups, and different applied growth models, which are needed to define hatch-dates. Although spawning sites could not be identified with high precision because of the strong diffusion in the area studied, results indicate that larvae up to 10 mm length are caught near their hatching sites. However, the location of successful spawning sites varied largely between years, with the main hatching sites situated in the Strelasund and the eastern entrance of the lagoon. This may reflect variations in spawning-site selection or quality. A better knowledge of the locations and relative importance of, and the processes occurring on, the different spawning sites will provide an important contribution to the sustainable management of this commercially valuable herring stock.  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 1054-3139 ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1136  
Lien permanent pour cet enregistrement
 

 
Auteur Robert, M.; Dagorn, L.; Bodin, N.; Pernet, F.; Arsenault-Pernet, E.J.; Deneubourg, J.L. url  doi
openurl 
  Titre Comparison of condition factors of skipjack tuna (Katsuwonus pelamis) associated or not with floating objects in an area known to be naturally enriched with logs Type Article scientifique
  Année 2014 Publication Revue Abrégée Canadian Journal of Fisheries and Aquatic Sciences = Journal Canadien des Sciences Halieutiques et A  
  Volume 71 Numéro 3 Pages (down) 472-478  
  Mots-Clés  
  Résumé Dans une région très peu modifiée par des dispositifs de concentration de poissons (DCP), le canal du Mozambique (naturellement riche en billes de bois, mais comptant peu de DCP), nous avons observé que l&8217;embonpoint de listao (Katsuwonus pelamis) associées à des objets flottants était plus faible que celui de leurs congénères nageant en bancs libres. Puisque ce résultat porte sur une zone analogue au milieu naturel avant l&8217;utilisation de DCP, il remet en question l&8217;interprétation d&8217;études antérieures voulant que cette différence reflète l&8217;incidence d&8217;un vaste déploiement de DCP sur les thonidés. Il est possible que, avant l&8217;utilisation de DCP, les thons associées aux billes de bois présentaient également un moins bon embonpoint que les thons nageant en bancs libres. Nos résultats semblent indiquer que la raison évolutive pour laquelle les thonidés sont associées à des objets flottants ne serait peut-être pas être reliée à des avantages trophiques à court terme, et d&8217;autres hypothèses (p. ex. l&8217;hypothèse du point de rencontre) sont invoquées pour expliquer ces résultats.  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue eng Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel LL @ pixluser @ collection 338  
Lien permanent pour cet enregistrement
Tout Sélectionner    Désélectionner
 |   | 
Détails
   print

Save Citations:
Export Records: