bascule de visibilité Search & Display Options

Tout Sélectionner    Désélectionner
 |   | 
Détails
   print
  Enregistrements Liens
Auteur Hattab, T.; Albouy, C.; Lasram, F.B.R.; Somot, S.; Le Loc'h, F.; Leprieur, F. url  doi
openurl 
  Titre Towards a better understanding of potential impacts of climate change on marine species distribution: a multiscale modelling approach Type Article scientifique
  Année 2014 Publication Revue Abrégée Global Ecology and Biogeography  
  Volume 23 Numéro 12 Pages 1417-1429  
  Mots-Clés climate change; exploited species; habitat loss; hierarchical filtering; Mediterranean Sea; spatial scale; species distribution modelling  
  Résumé Aim In this paper, we applied the concept of ‘hierarchical filters’ in community ecology to model marine species distribution at nested spatial scales. Location Global, Mediterranean Sea and the Gulf of Gabes (Tunisia). Methods We combined the predictions of bioclimatic envelope models (BEMs) and habitat models to assess the current distribution of 20 exploited marine species in the Gulf of Gabes. BEMs were first built at a global extent to account for the full range of climatic conditions encountered by a given species. Habitat models were then built using fine-grained habitat variables at the scale of the Gulf of Gabes. We also used this hierarchical filtering approach to project the future distribution of these species under both climate change (the A2 scenario implemented with the Mediterranean climatic model NEMOMED8) and habitat loss (the loss of Posidonia oceanica meadows) scenarios. Results The hierarchical filtering approach predicted current species geographical ranges to be on average 56% smaller than those predicted using the BEMs alone. This pattern was also observed under the climate change scenario. Combining the habitat loss and climate change scenarios indicated that the magnitude of range shifts due to climate change was larger than from the loss of P. oceanica meadows. Main conclusions Our findings emphasize that BEMs may overestimate current and future ranges of marine species if species–habitat relationships are not also considered. A hierarchical filtering approach that accounts for fine-grained habitat variables limits the uncertainty associated with model-based recommendations, thus ensuring their outputs remain applicable within the context of marine resource management.  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue en Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 1466-8238 ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel (up) LL @ pixluser @ collection 391  
Lien permanent pour cet enregistrement
 

 
Auteur Collos, Y.; Jauzein, C.; Hatey, E. url  doi
openurl 
  Titre Particulate carbon and nitrogen determinations in tracer studies: The neglected variables Type Article scientifique
  Année 2014 Publication Applied Radiation and Isotopes Revue Abrégée  
  Volume 94 Numéro Pages 14-22  
  Mots-Clés Suspended particulate matter; Carbon; Nitrogen; Adsorption; Material loss; Phytoplankton  
  Résumé Abstract

We address two issues in the determination of particulate carbon and nitrogen in suspended matter of aquatic environments. One is the adsorption of dissolved organic matter on filters, leading to overestimate particulate matter. The second is the material loss during filtration due to fragile algal cells breaking up. Examples from both laboratory cultures and natural samples are presented. We recommend using stacked filters in order to estimate the first and filtering different volumes of water in order to evaluate the second.
 
  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 0969-8043 ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel (up) MARBEC @ alain.herve @ collection 1318  
Lien permanent pour cet enregistrement
 

 
Auteur Narchi, N.E.; Cornier, S.; Canu, D.M.; Aguilar-Rosas, L.E.; Bender, M.G.; Jacquelin, C.; Thiba, M.; Moura, G.G.M.; De Wit, R. url  doi
openurl 
  Titre Marine ethnobiology a rather neglected area, which can provide an important contribution to ocean and coastal management Type Article scientifique
  Année 2014 Publication Revue Abrégée Ocean & Coastal Management  
  Volume 89 Numéro Pages 117-126  
  Mots-Clés  
  Résumé Abstract

This report describes marine ethnobiology as it has been presented and discussed under the conference session “Ethnothalassic interactions” organized for the 13th International Congress of Ethnobiology. We define marine ethnobiology as a field within ethnobiology that specifically comprises the study of the relationships of present and past human societies to marine biota and ecosystems. The session stimulated discussion on this emerging field and its contribution to coastal and ocean management, by exchanging experiences on a diverse array of studies within this field that include: co-management of marine protected areas, seascape management, demise, re-discovery and re-implementation of traditional knowledge-based management schemes, history of artisanal shellfish-farming and of the management of artisanal fisheries, medicinal knowledge of algae, as well as the outreach of ethnobiological studies for the conservation of the cultural-ecological heritage in the coastal zone. We here offer the conclusions of the conference session in the form of a longue duree perspective on coastal management that highlights a broad array of human adaptations to coastal environments. We suggest that these adaptations have to be researched and understood in detail in order to incorporate them into broader coastal management strategies in the presence of the severe environmental and political-economical pressures that currently threaten fishing stocks, marine habitats, and the livelihoods of the 2.6 billion people that depend on the oceans as their main source of protein.
 
  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 0964-5691 ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel (up) MARBEC @ alain.herve @ collection 1358  
Lien permanent pour cet enregistrement
 

 
Auteur Anderson, P.S.L.; Claverie, T.; Patek, S.N. url  doi
openurl 
  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.  
  Adresse  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 0014-3820 ISBN Médium  
  Région Expédition Conférence  
  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  
  Numéro d'Appel (up) MARBEC @ alain.herve @ collection 1156  
Lien permanent pour cet enregistrement
 

 
Auteur Avarre, J.-C.; Guinand, B.; Dugué, R.; Cosson, J.; Legendre, M.; Panfili, J.; Durand, J.-D. url  doi
openurl 
  Titre Plasticity of gene expression according to salinity in the testis of broodstock and F1 black-chinned tilapia, Sarotherodon melanotheron heudelotii Type Article scientifique
  Année 2014 Publication Revue Abrégée PeerJ  
  Volume 2 Numéro Pages  
  Mots-Clés Acclimation; fish; Gene expression; Male reproduction; salinity  
  Résumé The black-chinned tilapia Sarotherodon melanotheron heudelotii Rüppell 1852 (Teleostei, Cichlidae) displays remarkable acclimation capacities. When exposed to drastic changes of salinity, which can be the case in its natural habitat, it develops quick physiological responses and keeps reproducing. The present study focused on the physiological impact of salinity on male reproductive capacities, using gene expression as a proxy of acclimation process. Two series of experimental fish were investigated: the first one was composed of fish maintained in freshwater for several generations and newly acclimated to salinities of 35 and 70, whereas the second one consisted of the descendants of the latter born and were raised under their native salinity. Expression patterns of 43 candidate genes previously identified from the testes of wild males was investigated in the three salinities and two generations. Twenty of them showed significant expression differences between salinities, and their predicted function revealed that most of them are involved in the osmotic tolerance of sperm cells and/or in the maintenance of sperm motility. A high level of expression variation was evidenced, especially for fish maintained in freshwater. In spite of this, gene expression patterns allowed the differentiation between fish raised in freshwater and those maintained in hypersaline water in both generations. Altogether, the results presented here suggest that this high variability of expression is likely to ensure the reproductive success of this species under varying salinities.  
  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 2167-8359 ISBN Médium  
  Région Expédition Conférence  
  Notes Approuvé pas de  
  Numéro d'Appel (up) MARBEC @ alain.herve @ collection 1159  
Lien permanent pour cet enregistrement
Tout Sélectionner    Désélectionner
 |   | 
Détails
   print

Save Citations:
Export Records: