| Enregistrements |
| Auteur |
MAHE, K.; VILLANUEVA, C.-M.; VAZ, S.; COPPIN, F.; KOUBBI, P.; CARPENTIER, A. |
| Titre |
Morphological variability of the shape of striped red mullet Mullus surmuletus in relation to stock discrimination between the Bay of Biscay and the eastern English Channel |
Type |
Article scientifique |
| Année |
2014 |
Publication |
|
Revue Abrégée |
Journal Of Fish Biology |
| Volume |
84 |
Numéro |
4 |
Pages  |
1063-1073 |
| Mots-Clés |
fish body shape; head morphology; morphometric analysis; stock identification; Truss model |
| Résumé |
Striped red mullet Mullus surmuletus L. 1758 is an economically important species in the Mediterranean Sea and in the northern Atlantic Ocean, where it is exploited from the Bay of Biscay to the southern North Sea (ICES, 2010). In Atlantic waters, there are two main areas where this species is caught, the Bay of Biscay and the eastern English Channel. This species was initially exploited by the Spanish fleets along the Spanish coast inside the Bay of Biscay. Originally considered as valuable by-catch (Marchal, 2008), the growing exploitation ofM. surmuletus and a conspicuous increase in landings in the English Channel and the southern North Sea by French, English and Dutch fleets have been observed from the 1990s onwards. This was attributed to an increase in the migratory distribution and abundance of this species in these areas, which is largely heightened by the decline of traditionally targeted species and the trend for sea water warming (Poulard&Blanchard, 2005; Marchal, 2008; ICES, 2010). |
| 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 |
0022-1112 |
ISBN |
|
Médium |
|
| Région |
|
Expédition |
|
Conférence |
|
| Notes |
|
Approuvé |
pas de |
| Numéro d'Appel |
MARBEC @ isabelle.vidal-ayouba @ |
collection |
1137 |
| Lien permanent pour cet enregistrement |
| |
|
| |
| Auteur |
Bodin, N.; Lucas, V.; Dewals, P.; Adeline, M.; Esparon, J.; Chassot, E. |
| Titre |
Effect of brine immersion freezing on the determination of ecological tracers in fish |
Type |
Article scientifique |
| Année |
2014 |
Publication |
|
Revue Abrégée |
European Food Research and Technology |
| Volume |
238 |
Numéro |
6 |
Pages |
1057-1062 |
| Mots-Clés |
Brine immersion; Fatty acids; Frozen storage; Large pelagic fish; Persistent organic pollutants; Stable isotopes |
| Résumé |
The use of a multi-ecological tracer approach provides valuable and complementary insights to investigate the complex biology and ecology of large pelagic fish. Brine immersion freezing is the most common preservation technique used onboard for large fish to be frozen whole until they are delivered for sale and processing. We evaluated the effect of brine freezing on lipid and fatty acid composition, C and N stable isotope ratios, and organochlorine contaminant levels of yellowfin tuna (Thunnus albacares) and skipjack tuna (Katsuwonus pelamis). Fresh tunas were stored in a saturated sodium chlorine brine immersion tank maintained at -20 A degrees C for 6 weeks, and ecological tracers were analysed on dorsal muscle samples collected before and after brine freezing. No significant effect of the fish preservation technique was found except for delta N-15 whose signatures slightly increased after a 6-week period of brine immersion. Because N isotopic shift was close to the analytical precision and probably related to a higher risk of salt penetration in small tunas with abraded skin, we consider our results as conservative and conclude that ecological tracers can indeed be analysed on brine-freezing-preserved tunas. |
| 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 |
1438-2377 |
ISBN |
|
Médium |
|
| Région |
|
Expédition |
|
Conférence |
|
| Notes |
|
Approuvé |
pas de |
| Numéro d'Appel |
LL @ pixluser @ |
collection |
353 |
| Lien permanent pour cet enregistrement |
| |
|
| |
| Auteur |
HANEL, R.; STEPPUTTIS, D.; BONHOMMEAU, S.; CASTONGUAY, M.; SCHABER, M.; WYSUJACK, K.; VOBACH, M.; MILLER, M.J. |
| Titre |
Low larval abundance in the Sargasso Sea: new evidence about reduced recruitment of the Atlantic eels |
Type |
Article scientifique |
| Année |
2014 |
Publication |
|
Revue Abrégée |
Naturwissenschaften |
| Volume |
101 |
Numéro |
12 |
Pages |
1041-1054 |
| Mots-Clés |
Anguillidae; Anguilliformes; Eel larvae; Population declines; spawning area |
| Résumé |
The European eel Anguilla anguilla has shown decreased recruitment in recent decades. Despite increasing efforts to establish species recovery measures, it is unclear if the decline was caused by reduced numbers of reproductive-stage silver eels reaching the spawning area, low early larval survival, or increased larval mortality during migration to recruitment areas. To determine if larval abundances in the spawning area significantly changed over the past three decades, a plankton trawl sampling survey for anguillid leptocephali was conducted in March and April 2011 in the spawning area of the European eel that was designed to directly compare to collections made in the same way in 1983 and 1985. The catch rates of most anguilliform leptocephali were lower in 2011, possibly because of the slightly smaller plankton trawl used, but the relative abundances of European eel and American eel, Anguilla rostrata, leptocephali were much lower in 2011 than in 1983 and 1985 when compared to catches of other common leptocephali. The leptocephali assemblage was the same in 2011 as in previous years, but small larvae of mesopelagic snipe eels, Nemichthys scolopaceus, which spawn sympatrically with anguillid eels, were less abundant. Temperature fronts in the spawning area were also poorly defined compared to previous years. Although the causes for low anguillid larval abundances in 2011 are unclear, the fact that there are presently fewer European and American eel larvae in the spawning area than during previous time periods indicates that decreased larval abundance and lower eventual recruitment begin within the spawning area. |
| 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 |
0028-1042 |
ISBN |
|
Médium |
|
| Région |
|
Expédition |
|
Conférence |
|
| Notes |
|
Approuvé |
pas de |
| Numéro d'Appel |
MARBEC @ isabelle.vidal-ayouba @ |
collection |
1127 |
| Lien permanent pour cet enregistrement |
| |
|
| |
| Auteur |
Pellissier, L.; Leprieur, F.; Parravicini, V.; Cowman, P.F.; Kulbicki, M.; Litsios, G.; Olsen, S.M.; Wisz, M.S.; Bellwood, D.R.; Mouillot, D. |
| Titre |
Quaternary coral reef refugia preserved fish diversity |
Type |
Article scientifique |
| Année |
2014 |
Publication |
|
Revue Abrégée |
Science |
| Volume |
344 |
Numéro |
6187 |
Pages |
1016-1019 |
| Mots-Clés |
abundance; areas; assembly rules; cradles; global patterns; gradient; hotspots; marine biodiversity; museums; species richness |
| Résumé |
The most prominent pattern in global marine biogeography is the biodiversity peak in the Indo-Australian Archipelago. Yet the processes that underpin this pattern are still actively debated. By reconstructing global marine paleoenvironments over the past 3 million years on the basis of sediment cores, we assessed the extent to which Quaternary climate fluctuations can explain global variation in current reef fish richness. Comparing global historical coral reef habitat availability with the present-day distribution of 6316 reef fish species, we find that distance from stable coral reef habitats during historical periods of habitat loss explains 62% of the variation in fish richness, outweighing present-day environmental factors. Our results highlight the importance of habitat persistence during periods of climate change for preserving marine biodiversity. |
| 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 |
0036-8075 |
ISBN |
|
Médium |
|
| Région |
|
Expédition |
|
Conférence |
|
| Notes |
|
Approuvé |
pas de |
| Numéro d'Appel |
MARBEC @ isabelle.vidal-ayouba @ |
collection |
801 |
| Lien permanent pour cet enregistrement |
| |
|
| |
| Auteur |
Killen, S.S.; Marras, S.; McKenzie, D.J. |
| Titre |
Fast growers sprint slower: effects of food deprivation and re-feeding on sprint swimming performance in individual juvenile European sea bass |
Type |
Article scientifique |
| Année |
2014 |
Publication |
|
Revue Abrégée |
Journal of Experimental Biology |
| Volume |
217 |
Numéro |
6 |
Pages |
859-865 |
| Mots-Clés |
Compensatory growth; Ecophysiology; Food deprivation; Foraging; Locomotion; atlantic; catch-up growth; cod; dicentrarchus-labrax; ecological performance; gadus-morhua; long-term starvation; metabolic responses; salmon; teleost fish; trade-off; trade-offs; trout oncorhynchus-mykiss |
| Résumé |
While many ectothermic species can withstand prolonged fasting without mortality, food deprivation may have sublethal effects of ecological importance, including reductions in locomotor ability. Little is known about how such changes in performance in individual animals are related to either mass loss during food deprivation or growth rate during re-feeding. This study followed changes in the maximum sprint swimming performance of individual European sea bass, Dicentrarchus labrax, throughout 45 days of food deprivation and 30 days of re-feeding. Maximum sprint speed did not show a significant decline until 45 days of food deprivation. Among individuals, the reduction in sprinting speed at this time was not related to mass loss. After 30 days of re-feeding, mean sprinting speed had recovered to match that of control fish. Among individuals, however, maximum sprinting speed was negatively correlated with growth rate after the resumption of feeding. This suggests that the rapid compensatory growth that occurs during re-feeding after a prolonged fast carries a physiological cost in terms of reduced sprinting capacity, the extent of which shows continuous variation among individuals in relation to growth rate. The long-term repeatability of maximum sprint speed was low when fish were fasted or fed a maintenance ration, but was high among control fish fed to satiation. Fish that had been previously food deprived continued to show low repeatability in sprinting ability even after the initiation of ad libitum feeding, probably stemming from variation in compensatory growth among individuals and its associated negative effects on sprinting ability. Together, these results suggest that food limitation can disrupt hierarchies of maximum sprint performance within populations. In the wild, the cumulative effects on locomotor capacity of fasting and re-feeding could lead to variable survival among individuals with different growth trajectories following a period of food deprivation. |
| 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 |
0022-0949 |
ISBN |
|
Médium |
|
| Région |
|
Expédition |
|
Conférence |
|
| Notes |
|
Approuvé |
pas de |
| Numéro d'Appel |
MARBEC @ isabelle.vidal-ayouba @ |
collection |
601 |
| Lien permanent pour cet enregistrement |
