|
|
|
| Registros recuperados: 45.096 | |
|
|
| Ider, D.; Ramdane, Z.; Mahe, Kelig; Dufour, Jean-louis; Bacha, M.; Amara, R.. |
| Otolith-shape analysis was examined to determine its utility for biological stock identification of the bogue Boops boops along the Algerian coast of the Mediterranean Sea. The outlines of 179 sagittal otolith pairs from fish collected at three locations (Oran, Bejaia and Annaba) between 2013 and 2016 were digitised and analysed for shape variation by elliptical Fourier analysis. Potential confounding sources of variation (fish length, age and sex, and left or right otolith position) were examined and accounted for in the analyses before interpretation of spatial differences in distribution of the stock. Redundancy analysis showed a significant difference between the left and right otoliths. No difference was correlated with sex and age, but fish length... |
| Tipo: Text |
Palavras-chave: Biological stocks; Elliptical Fourier analysis; Image analysis; Linear discriminant analysis; Marine fish; Principal components analysis; Sex differences. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00409/52075/52855.pdf |
| |
|
|
| Bentamy, Abderrahim; Grodsky, Semyon A.; Katsaros, Kristina; Mestas-nunez, Alberto M.; Blanke, Bruno; Desbiolles, Fabien. |
| A new method is developed to estimate daily turbulent airsea fluxes over the global ocean on a 0.25 degrees grid. The required surface wind speed (w(10)) and specific air humidity (q(10)) at 10m height are both estimated from remotely sensed measurements. w(10) is obtained from the SeaWinds scatterometer on board the QuikSCAT satellite. A new empirical model relating brightness temperatures (T-b) from the Special Sensor Microwave Imager (SSM/I) and q(10) is developed. It is an extension of the author's previous q(10) model. In addition to T-b, the empirical model includes sea surface temperature (SST) and airsea temperature difference data. The calibration of the new empirical q(10) model utilizes q(10) from the latest version of the National Oceanography... |
| Tipo: Text |
|
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00137/24825/23575.pdf |
| |
|
| |
|
|
| Alunno-bruscia, Marianne; Petraitis, P; Bourget, E; Frechette, Marcel. |
| We grew mussels (Mytilus edulis) under two different food regimes and eight population density levels to estimate the joint effects of density and biomass on their growth and survival and to determine the shape of the biomass-density (B-IV) relationship. Mussels were reared for 22 months, between December 1994 and October 1996, in 1-L experimental chambers supplied with natural seston. Growth in shell length, individual wet mass and ash free dry mass (m) decreased with decreasing food availability and increasing population density. Survival was negatively correlated with density but did not differ significantly between food regimes during the first year. Variations in concentration of available food did not alter the effects of crowding on mussels, as... |
| Tipo: Text |
|
| Ano: 2000 |
URL: http://archimer.ifremer.fr/doc/2000/publication-6791.pdf |
| |
|
|
| Lamy, Nathalie. |
| L'étude des peuplements macrobenthiques d'une table d'élevage conchylicole de l'étang de Thau (Méditerranée) s'inscrit dans le cadre du programme de recherches OXYTHAU-PNOC. Elle concerne les peuplements de substrat meuble, situés sous et au voisinage de la table, mais également ceux de substrat dur, associés aux mollusques d'élevage et à leur supports. Les substrats meubles ont été échantillonnés en février 1991 et en mai 1992. Les peuplements de substrat dur ont été étudiés par colonisation de surfaces collectrices vierges et suivis sur une période de 19 mois, d'avril 1992 à novembre 1993. La table d'élevage accueille des peuplements riches (jusqu'à 146 espèces sur les substrats durs) et assez diversifiés (l'indice de Shannon est de l'ordre de 2 à 4 bits... |
| Tipo: Text |
|
| Ano: 1996 |
URL: http://archimer.ifremer.fr/doc/00073/18447/15987.pdf |
| |
|
|
| Prevost, Etienne. |
| Traditionally fished by line and conical fishing basket by Venezuelan ships, the red snapper resource off the coast of French Guyana (fish belonging to the Lutjanidae family) has been experiencing intensive fishing since 1984-85 due to the boom in classic fishing techniques and the development of trawl fishing. The study evaluates the situation of this resource's potential: biology, sampling data, bio-statistics (size and sex), size-weight relationship of the three species, specific composition of the catches, describes fishing devices and prospecting, pinpoints fishing spots, gives a distribution of the Venezuelan and Martinique fishing effort. |
| Tipo: Text |
Palavras-chave: Bow net; Trawl; Fishing line; Franch Guyana; Lutjanidae; Guyane; Chalut; Nasse; Ligne; Engin de pêche; Lutjanidae; Vivaneau. |
| Ano: 1986 |
URL: http://archimer.ifremer.fr/doc/1986/rapport-2646.pdf |
| |
|
|
| Nikolic, Natacha; Montes, Iratxe; Lalire, Maxime; Puech, Alexis; Bodin, Nathalie; Arnaud-haond, Sophie; Kerwath, Sven; Corse, Emmanuel; Gaspar, Philippe; Hollanda, Stéphanie; Bourjea, Jerome; West, Wendy; Bonhommeau, Sylvain. |
| Albacore tuna (Thunnus alalunga) is an important target of tuna fisheries in the Atlantic and Indian Oceans. The commercial catch of albacore is the highest globally among all temperate tuna species, contributing around 6% in weight to global tuna catches over the last decade. The accurate assessment and management of this heavily exploited resource requires a robust understanding of the species’ biology and of the pattern of connectivity among oceanic regions, yet Indian Ocean albacore population dynamics remain poorly understood and its level of connectivity with the Atlantic Ocean population is uncertain. We analysed morphometrics and genetics of albacore (n = 1,874) in the southwest Indian (SWIO) and southeast Atlantic (SEAO) Oceans to investigate the... |
| Tipo: Text |
|
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00653/76483/77555.pdf |
| |
|
|
| Hatt, Philippe-jacques. |
| La famille des Pénéides comprend plus de 200 espèces réparties plus particulièrement dans les mers chaudes et tempérées. P. japonicus est très répandue au Japon, en particulier sur la côte Pacifique et méridionale. Elle est fréquente le long des côtes de Chine et de Corée. On la trouve à l'état endémique sur les côte de l'Afrique de l'Est, de la Mer Rouge, des golfes d'Alexandrie, d'Arabie et du Bengale, de l'archipel indonésien, du Nord-Est de l'Australie et des Iles Fidji. Elle a été introduite artificiellement dans le bassin méditerranéen et sur la côte atlantique, où des pêcheurs signalent leur présence exceptionnelle. |
| Tipo: Text |
|
| Ano: 1991 |
URL: https://archimer.ifremer.fr/doc/00509/62114/66307.pdf |
| |
|
| |
|
|
| Mullon, C.; Mittaine, J-f.; Thebaud, Olivier; Peron, G.; Merino, G.; Barange, M.. |
| P>To explore the drivers of change in the complex system relating small pelagic fisheries and fishmeal/fish oil markets, to identify the interactions between these drivers and their overall impacts, we propose a bio-economic model, coupling the ecological and the economic dynamics of these global commodities. The model enables an analysis of the consequences of both global and local changes in the environment of production systems. Through sensitivity analysis of specific input parameters, we evaluate the robustness of the overall system to such changes and show that local responses of production systems and markets cannot be considered in isolation from the set of interactions at global level. |
| Tipo: Text |
Palavras-chave: Fish oil; Fishmeal; Small pelagic fisheries; Networks economics; Bio economic modeling. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6938.pdf |
| |
|
|
| D'Ortenzio, Fabrizio; Lavigne, Heloise; Besson, Florent; Claustre, Herve; Coppola, Laurent; Garcia, Nicole; Laes-huon, Agathe; Le Reste, Serge; Malarde, Damien; Migon, Christophe; Morin, Pascal; Mortier, Laurent; Poteau, Antoine; Prieur, Louis; Raimbault, Patrick; Testor, Pierre. |
| Two profiling floats, equipped with nitrate concentration sensors were deployed in the northwestern Mediterranean from summer 2012 to summer 2013. Satellite ocean color data were extracted to evaluate surface chlorophyll concentration at float locations. Time series of mixed layer depths and nitrate and chlorophyll concentrations were analyzed to characterize the interplay between the physical-chemical and biological dynamics in the area. Deep convection (mixed layer depth > 1000 m) was observed in January–February, although high-nitrate surface concentrations could be already observed in December. Chlorophyll increase is observed since December, although high values were observed only in March. The early nitrate availability in subsurface layers, which... |
| Tipo: Text |
Palavras-chave: Bio-Argo; Mediterranean; Mixed layer; Bloom onset; Nitrate concentration; Ocean color satellite. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00211/32225/30673.pdf |
| |
|
| |
|
|
| Hoshino, Yosuke; Poshibaeva, Aleksandra; Meredith, William; Snape, Colin; Poshibaev, Vladimir; Versteegh, Gerard J. M.; Kuznetsov, Nikolay; Leider, Arne; Van Maldegem, Lennart; Neumann, Mareike; Naeher, Sebastian; Moczydlowska, Malgorzata; Brocks, Jochen J.; Jarrett, Amber J. M.; Tang, Qing; Xiao, Shuhai; Mckirdy, David; Das, Supriyo Kumar; Alvaro, Jose Javier; Sansjofre, Pierre; Hallmann, Christian. |
| Sedimentary hydrocarbon remnants of eukaryotic C-26-C-30 sterols can be used to reconstruct early algal evolution. Enhanced C-29 sterol abundances provide algal cellmembranes a density advantage in large temperature fluctuations. Here, we combined a literature review with new analyses to generate a comprehensive inventory of unambiguously syngenetic steranes in Neoproterozoic rocks. Our results show that the capacity for C-29 24ethyl- sterol biosynthesis emerged in the Cryogenian, that is, between 720 and 635 million years ago during the Neoproterozoic Snowball Earth glaciations, which were an evolutionary stimulant, not a bottleneck. This biochemical innovation heralded the rise of green algae to global dominance of marine ecosystems and highlights the... |
| Tipo: Text |
|
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00638/75021/75667.pdf |
| |
|
|
| ICES. |
| The main terms of reference for the The ICES Working Group for the Assessment of Demersal Stocks in the North Sea and Skagerrak (WGNSSK) were: to update, quality check and report relevant data for the working group, to update and audit the assessment and forecasts of the stocks, to produce a first draft of the advice on the fish stocks and to prepare planning for bench-marks in future years.. Ecosystem changes have been analytically considered in the assessments for cod, haddock and whiting in the form of varying natural mortalities estimated by the ICES Working Group on Multi Species Assessment Methods (WGSAM). Benchmarks and Inter-benchmarks in 2018/2019 No full benchmarks were conducted during 2019 for WGNSSK stocks. However, there were sev-eral... |
| Tipo: Text |
|
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00600/71167/69500.pdf |
| |
|
|
| Degremont, Lionel; Boudry, Pierre; Soletchnik, Patrick; Bedier, Edouard; Ropert, Michel; Samain, Jean-francois. |
| Three successive generations were produced between 2001 and 2003 to assess to what extent genetic variability exists for survival in juvenile oysters Crassostrea gigas. For each generation, two groups were selected for their high ("R" for resistant) and low ("S" for susceptible) survival. Significant differences in mortality were observed during the first year in Riviere d'Auray (RA) (Brittany-France). However, low and similar mortality were observed for both groups, with no significant difference between groups in the first and second generation in this site, where the first summer is the critical, sensitive period with a clear age effect. In Baie des Veys (BDV) (Normandie-France), where mortalities usually mainly affect adults, mortality between groups,... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Spat; Spatial variations; Survival; Rearing; Mollusc culture; Marine molluscs; Environmental factors; Nursery grounds; Mortality causes; Biological age; Aquaculture techniques. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/acte-3385.pdf |
| |
|
|
| Singh, Awnesh; Delcroix, Thierry; Cravatte, Sophie. |
| The recent detection of a central Pacific type of El Nino has added a new dimension to the El Nino-Southern Oscillation climatic puzzle. Sea surface salinity (SSS) observations collected during 1977-2008 in the tropical Pacific are used to contrast the three eastern Pacific (EP) (1982-1983, 1991-1992, 1997-1998) and seven central Pacific (CP) (1977-1978, 1986-1988, 1990-1991, 1992-1995, 2002-2003, 2004-2005, 2006-2007) types of El Nino events, as well as the six EP (1985-1986, 1988-1989, 1995-1996, 1999-2001, 2005-2006, 2007-2008) and two CP (1983-1984, 1998-1999) types of La Nina events. The EP El Nino events result in large (similar to 30 degrees longitude) eastward displacements of the eastern edge of the low-salinity warm pool waters in the equatorial... |
| Tipo: Text |
|
| Ano: 2011 |
URL: https://archimer.ifremer.fr/doc/00213/32452/30915.pdf |
| |
|
|
| Chupeau, Gaelle. |
| Le but de ce travail était de rechercher des marqueurs non neutres afin de comparer ces données obtenues avec celles données par les marqueurs précédemment étudiés (marqueurs neutres ou supposés l'être à savoir microsatellites, enzymatique et mitochondriales). Dû à des soucis d'ADN extrait des populations qui avaient été étudiées jusqu'alors, il a fallu effectuer un nouvel échantillonnage de l'huître plate Européenne, Ostrea edulis, sur son aire de répartition. Nous avons donc analysé en plus du but majeur, les données microsatellites pour ces nouvelles populations de manière à avoir un jeu de données de marqueurs non neutres. Ces analyses ont ainsi complété l'arbre phylogénétique déjà existant, et ont confirmé dans une moindre mesure puisque tous les... |
| Tipo: Text |
Palavras-chave: Huître plate; Ostrea edulis; Génétique des populations; Nucleotide Polymorphisme (SNP); Test de neutralisté; Microsatellites. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/00033/14417/11712.pdf |
| |
|
| |
|
| |
|
| |
| Registros recuperados: 45.096 | |
|
|
|
