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Auteur (up) ADJEROUD, M.; GUERECHEAU, A.; VIDAL-DUPIOL, J.; FLOT, J.-F.; ARNAUD-HAOND, S.; BONHOMME, F.
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 531-541
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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
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ISSN 0025-3162 ISBN Médium
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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
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Auteur (up) Ahmedou Salem, M.V.; van der Geest, M.; Piersma, T.; Saoud, Y.; van Gils, J.A.
Titre Seasonal changes in mollusc abundance in a tropical intertidal ecosystem, Banc d’Arguin (Mauritania): testing the ‘shorebird depletion’ hypothesis Type Article scientifique
Année 2014 Publication Revue Abrégée Estuarine Coastal and Shelf Science
Volume 136 Numéro Pages 26-34
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Numéro d'Appel MARBEC @ alain.herve @ 943 collection 1366
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Auteur (up) Albouy, C.; Velez, L.; Coll, M.; Colloca, F.; Le Loc'h, F.; Mouillot, D.; Gravel, D.
Titre From projected species distribution to food-web structure under climate change Type Article scientifique
Année 2014 Publication Revue Abrégée Global Change Biology
Volume 20 Numéro 3 Pages 730-741
Mots-Clés climate change; connectance; fish body size; food-webs; generality; Mediterranean Sea; metaweb; niche model; vulnerability
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ISSN 1354-1013 ISBN Médium
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Auteur (up) Alegre, A.; Ménard, F.; Tafur, R.; Espinoza, P.; Arguelles, J.; Maehara, V.; Flores, O.; Simier, M.; Bertrand, A.
Titre Comprehensive model of jumbo squid Dosidicus gigas trophic ecology in the Northern Humboldt Current System Type Article scientifique
Année 2014 Publication Revue Abrégée Plos One
Volume 9 Numéro 1 Pages
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Résumé The jumbo squid Dosidicus gigas plays an important role in marine food webs both as predator and prey. We investigated the ontogenetic and spatiotemporal variability of the diet composition of jumbo squid in the northern Humboldt Current system. For that purpose we applied several statistical methods to an extensive dataset of 3,618 jumbo squid non empty stomachs collected off Peru from 2004 to 2011. A total of 55 prey taxa was identified that we aggregated into eleven groups. Our results evidenced a large variability in prey composition as already observed in other systems. However, our data do not support the hypothesis that jumbo squids select the most abundant or energetic taxon in a prey assemblage, neglecting the other available prey. Indeed, multinomial model predictions showed that stomach fullness increased with the number of prey taxa, while most stomachs with low contents contained one or two prey taxa only. Our results therefore question the common hypothesis that predators seek locally dense aggregations of monospecific prey. In addition D. gigas consumes very few anchovy Engraulis ringens in Peru, whereas a tremendous biomass of anchovy is potentially available. It seems that D. gigas cannot reach the oxygen unsaturated waters very close to the coast, where the bulk of anchovy occurs. Indeed, even if jumbo squid can forage in hypoxic deep waters during the day, surface normoxic waters are then required to recover its maintenance respiration (or energy?). Oxygen concentration could thus limit the co-occurrence of both species and then preclude predator-prey interactions. Finally we propose a conceptual model illustrating the opportunistic foraging behaviour of jumbo squid impacted by ontogenetic migration and potentially constrained by oxygen saturation in surface waters.
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ISSN 1932-6203 ISBN Médium
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Auteur (up) Anderson, P.S.L.; Claverie, T.; Patek, S.N.
Titre Levers And Linkages: Mechanical Trade-Offs In A Power-Amplified System Type Article scientifique
Année 2014 Publication Revue Abrégée Evolution
Volume 68 Numéro 7 Pages 1919-1933
Mots-Clés amplification; Biomechanics; comparative methods; evolution; kinematic transmission; labrid fishes; mantis shrimp; modularity; morphology; phylogenetic; stomatopods; strike; trade-offs
Résumé Mechanical redundancy within a biomechanical system (e. g., many-to-one mapping) allows morphologically divergent organisms to maintain equivalent mechanical outputs. However, most organisms depend on the integration of more than one biomechanical system. Here, we test whether coupled mechanical systems follow a pattern of amplification (mechanical changes are congruent and evolve toward the same functional extreme) or independence (mechanisms evolve independently). We examined the correlated evolution and evolutionary pathways of the coupled four-bar linkage and lever systems in mantis shrimp (Stomatopoda) ultrafast raptorial appendages. We examined models of character evolution in the framework of two divergent groups of stomatopods-“smashers” (hammer-shaped appendages) and “spearers” (bladed appendages). Smashers tended to evolve toward force amplification, whereas spearers evolved toward displacement amplification. These findings show that coupled biomechanical systems can evolve synergistically, thereby resulting in functional amplification rather than mechanical redundancy.
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ISSN 0014-3820 ISBN Médium
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Notes <p>ISI Document Delivery No.: AL3TK<br/>Times Cited: 1<br/>Cited Reference Count: 40<br/>Anderson, Philip S. L. Claverie, Thomas Patek, S. N.<br/>National Science Foundation [IOS-1149748]<br/>The authors would like to thank S. Price for extensive assistance on phylogenetic comparative methods and L. Revell for help and advice for using his Phytools package for R. We would also like to thank M. Porter, M. Rosario, P. Green, S. Cox, and K. Kagaya for helpful discussions on stomatopod biology as well as two anonymous reviewers for their insightful comments, which have greatly improved the quality of this article. We also thank K. Reed (National Museum of Natural History, Washington, DC) and S. Keable (Australian Museum of Natural History, Sydney) for access to their specimen collections. This work was funded by the National Science Foundation (IOS-1149748) to SNP. The authors declare no conflict of interest.<br/>Wiley-blackwell<br/>Hoboken</p> Approuvé pas de
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