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Auteur Lorin-Nebel, C.; Budzinski, H.; Le Ménach, K.; Devier, M.H.; Charmantier, G.; Gros, R.; Grousset, E.; Blondeau-Bidet, E.; Farcy, E.
Titre (up) 4-Nonylphenol disrupts osmoregulation in the European sea-bass Dicentrarchus labrax Type Article scientifique
Année 2014 Publication Revue Abrégée Journal of Xenobiotics
Volume 4 Numéro Pages 4905-4907
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 418
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Auteur Christensen, V.; Coll, M.; Piroddi, C.; Steenbeek, J.; Buszowski, J.; Pauly, D.
Titre (up) A century of fish biomass decline in the ocean Type Article scientifique
Année 2014 Publication Revue Abrégée Mar Ecol Prog Ser
Volume 512 Numéro Pages 155-166
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Résumé ABSTRACT: We performed a global assessment of how fish biomass has changed over the last 100 yr, applying a previously developed methodology using ecological modeling. Our assessment built on more than 200 food web models representing marine ecosystems throughout the world covering the period from 1880 to 2007. All models were constructed based on the same approach, and have been previously documented. We spatially and temporally distributed fish biomasses delivered by these models based on fish habitat preferences, ecology, and feeding conditions. From these distributions, we extracted over 68000 estimates of biomass (for predatory and prey fishes separately, including trophic level of 3.5 or higher, and trophic level between 2.0 and 3.0, respectively), and predicted spatial-temporal trends in fish biomass using multiple regression. Our results predicted that the biomass of predatory fish in the world oceans has declined by two-thirds over the last 100 yr. This decline is accelerating, with 54% occurring in the last 40 yr. Results also showed that the biomass of prey fish has increased over the last 100 yr, likely as a consequence of predation release. These findings allowed us to predict that there will be fish in the future ocean, but the composition of fish assemblages will be very different from current ones, with small prey fish dominating. Our results show that the trophic structure of marine ecosystems has changed at a global scale, in a manner consistent with fishing down marine food webs.
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Numéro d'Appel LL @ pixluser @ collection 379
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Auteur Miller, M.J.; Bonhommeau, S.; Munk, P.; Castonguay, M.; Hanel, R.; McCleave, J.D.
Titre (up) A century of research on the larval distributions of the Atlantic eels: a re-examination of the data Type Article scientifique
Année 2014 Publication Revue Abrégée Biological Reviews
Volume Numéro Pages
Mots-Clés anguilla; freshwater eels; larval distribution; oceanic fronts.; Sargasso Sea; spawning area
Résumé The spawning areas of the Atlantic freshwater eels were discovered about a century ago by the Danish scientistJohannes Schmidt who after years of searching found newly hatched larvae of the European eel, Anguillaanguilla, and the American eel, Anguilla rostrata, in the southern Sargasso Sea. The discovery showed thatanguillid eels migrate thousands of kilometers to offshore spawning areas for reproduction, and that theirlarvae, called leptocephali, are transported equally long distances by ocean currents to their continentalrecruitment areas. The spawning sites were found to be related to oceanographic conditions several decadeslater by German and American surveys from 1979 to 1989 and by a Danish survey in 2007 and a Germansurvey in 2011. All these later surveys showed that spawning occurred within a restricted latitudinal range,between temperature fronts within the Subtropical Convergence Zone of the Sargasso Sea. New data andre-examinations of Schmidt’s data confirmed his original conclusions about the two species having someoverlap in spawning areas. Although there have been additional collections of leptocephali in various parts ofthe North Atlantic, and both otolith research and transport modelling studies have subsequently been carriedout, there is still a range of unresolved questions about the routes of larval transport and durations of migration.This paper reviews the history and basic findings of surveys for anguillid leptocephali in the North Atlantic andanalyses a new comprehensive database that includes 22612 A. anguilla and 9634 A. rostrata leptocephali, whichprovides a detailed view of the spatial and temporal distributions and size of the larvae across the Atlantic basinand in the Mediterranean Sea. The differences in distributions, maximum sizes, and growth rates of the twospecies of larvae are likely linked to the contrasting migration distances to their recruitment areas on eachside of the basin. Anguilla rostrata leptocephali originate from a more western spawning area, grow faster, andmetamorphose at smaller sizes of <70mm than the larvae of A. anguilla, which mostly are spawned further eastand can reach sizes of almost 90 mm. The larvae of A. rostrata spread west and northwest from the spawningarea as they grow larger, with some being present in the western Caribbean and eastern Gulf of Mexico. Larvaeof A. anguilla appear to be able to reach Europe by entering the Gulf Stream system or by being entrainedinto frontal countercurrents that transport them directly northeastward. The larval duration of A. anguillais suggested to be quite variable, but gaps in sampling effort prevent firm conclusions. Although knowledgeabout larval behaviour is lacking, some influences of directional swimming are implicated by the temporaldistributions of the largest larvae. Ocean–atmosphere changes have been hypothesized to affect the survivalof the larvae and cause reduced recruitment, so even after about a century following the discovery of theirspawning areas, mysteries still remain about the marine life histories of the Atlantic eels.
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ISSN 1464-7931 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1125
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Auteur Hadjadji, I.; Frehi, H.; Ayada, L.; Abadie, E.; Collos, Y.
Titre (up) 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
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ISSN 1631-0691 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 397
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Auteur Rolland, J.-L.; Medhioub, W.; Vergnes, A.; Abi-khalil, C.; Savar, V.; Abadie, E.; Masseret, E.; Amzil, Z.; Laabir, M.
Titre (up) A Feedback Mechanism to Control Apoptosis Occurs in the Digestive Gland of the Oyster Crassostrea gigas Exposed to the Paralytic Shellfish Toxins Producer Alexandrium catenella Type Article scientifique
Année 2014 Publication Revue Abrégée Marine Drugs
Volume 12 Numéro 9 Pages 5035-5054
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ISSN 1660-3397 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 396
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