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| Registros recuperados: 57 | |
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| Rabhi, Khalef; Bellamy, Elise; Elleboode, Romain; Aumond, Yoann; Huet, Jerome; Roos, David; Mahe, Kelig. |
| Cette étude correspond au volet « croissance » du projet ANCRE-DMX2. Six espèces ciblées parmi les principales espèces démersales débarquées par la petite pêche réunionnaise ont été étudiées afin d’établir leur modèle de croissance, dont certaines pour la première fois. Ce travail présente les résultats de la croissance, acquis à partir de pièces calcifiées (otolithe, écaille, opercule). Des tests préalables des différentes techniques (observation in toto, otolithe brûlé, otolithe cassé-brûlé, coupe fine) sur les principales pièces calcifiées (otolithes, écailles et opercules) ont été menés, afin d’appliquer la méthode de traitement la mieux adaptée à chaque espèce. Les paramètres morphométriques de l’otolithe ont été mesurés (Poids : Ow, Longueur : OLong,... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00347/45866/45554.pdf |
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| Luschi, Paolo; Benhamou, Simon; Girard, Charlotte; Ciccione, Stéphane; Roos, David; Sudre, Joël; Benvenuti, Silvano. |
| Marine turtles are renowned long-distance navigators, able to reach remote targets in the oceanic environment; yet the sensory cues and navigational mechanisms they employ remain unclear [1-3]. Recent arena experiments indicated an involvement of magnetic cues in juvenile turtles' homing ability after simulated displacements [4, 5], but the actual role of geomagnetic information in guiding turtles navigating in their natural environment has remained beyond the reach of experimental investigations. In the present experiment, twenty satellite-tracked green turtles (Chelonia mydas) were transported to four open-sea release sites 100-120 km from their nesting beach on Mayotte island in the Mozambique Channel; 13 of them had magnets attached to their head [6]... |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2407.pdf |
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| Beaubrun, Pierre; Roos, David; Astruc, Guillelme; Conejero, Sandrine; Renard, Delphine; Bigot, Jean-louis; Liorzou, Bernard; Le Corre, Gildas; Mellon, Capucine. |
| Cette étude présente les espèces et les peuplements de petits poissons pélagiques rencontrés au sein du golfe du Lion, ainsi que les espèces d’oiseaux marins qui y sont associées. Les données ont été collectées durant les campagnes à la mer PELMED (été) et JUVALION (hiver) de 1994 à 2010. Tout au long des différents chapitres, les analyses suivent un plan montrant successivement, pour les petits poissons pélagiques comme pour les oiseaux marins, les proportions relatives des différents groupes d’espèces composant chacun des peuplements étudiés puis, au sein de chacun de ces groupes, les distributions relatives de chacune des espèces observées. La cartographie et l’analyse des données présentées dans le présent rapport englobent d’une part toute la zone... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00455/56628/58364.pdf |
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| Van Beveren, Elisabeth; Bonhommeau, Sylvain; Fromentin, Jean-marc; Bigot, Jean-louis; Bourdeix, Jean-herve; Brosset, Pablo; Roos, David; Saraux, Claire. |
| Since 2007, the ecosystem of the Gulf of Lions has shifted to a different regime, characterised by a low anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) biomass and a remarkably high sprat (Sprattus sprattus) biomass. Surprisingly, the abundance and recruitment of anchovy and sardine remained high. To understand which processes (bottom-up or top-down control, etc.) could have caused this shift, we studied the changes in body condition, growth and size and age of anchovy, sardine and sprat over 1984–1985 and 1992–2012, using data from scientific surveys. The annual age structure of anchovy and sardine was estimated using Bayesian mixture models based on size frequency data with priors on the age–length relationship derived from independent... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00192/30335/29917.pdf |
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| Pethybridge, H.; Bodin, Nathalie; Arsenault-pernet, E. -j.; Bourdeix, Jean-herve; Brisset, Blandine; Bigot, Jean-louis; Roos, David; Peter, M.. |
| We describe the total lipid content, lipid class composition and fatty acid profiles of adult forage fishes (anchovy, sardine and sprat) sampled in the NW Mediterranean Sea in 2010 and 2011. Inter-and intra-species differences were mostly related to sampling period with limited effect of gender or total length. As an assemblage, total lipid content and relative levels of triacylglycerols and fatty acids 16:1n7, 20:5n3 and 14:0 in forage fish were highest in summer and autumn, indicating better feeding conditions and a more pronounced diatom-supported food web. In contrast, total lipid content was lowest at the end of winter and spring, and coincided with high levels of 22:6n3, indicating a more herbivorous diet based on dinoflagellates. Resource... |
| Tipo: Text |
Palavras-chave: Trophic markers; Environmental variations; Clupeiformes; Nutritional condition; Prey quality; Ecosystem health. |
| Ano: 2014 |
URL: https://archimer.ifremer.fr/doc/00239/34997/33530.pdf |
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| Mahe, Kelig; Aumond, Yoann; Rabhi, Khalef; Elleboode, Romain; Bellamy, Elise; Huet, Jerome; Gault, M.; Roos, David. |
| The ornate jobfish Pristipomoides argyrogrammicus Valenciennes 1832 occurs in the Indo-West Pacific Ocean, where it is harvested by small-scale coastal fisheries. Management of this species is hindered by lack of adequate biological data. We sampled a total of 113 individuals from the landings of local artisanal fishers on the island of Réunion (southwestern Indian Ocean), from March 2014 to March 2015. The relationships between two types of body length (total and standard length, cm) and total weight (g) were shown to be significant (p < 0.05). The length–weight relationship was described by a power function, with the scaling factor estimated to be 0.008 and the exponent 3.146. Age was determined using whole otoliths. The von Bertalanffy growth... |
| Tipo: Text |
Palavras-chave: Age estimate; General linear model; Lutjanidae; Modelled age; Morphometric parameters; Otolith morphometry; Reading precision. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00399/51017/51863.pdf |
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| Mahe, Kelig; Rabhi, Khalef; Bellamy, Elise; Elleboode, Romain; Aumond, Yoann; Huet, Jerome; Cresson, Pierre; Roos, David. |
| The oblique-banded grouper, Epinephelus radiatus (Day, 1968), occurred within the whole Indo- West Pacific where it is harvested by small-scale coastal fisheries. The aim of this study was to estimate the growth of this species at Reunion Island (South-West Indian Ocean) since no study investigated this topic so far. Fifty-seven individuals were sampled in the landings of the French local artisanal fisheries from March 2014 to March 2015. The relationships between two types of body length (total and standard lengths, cm) and total weight (g) were significant (p < 0.05). Total length-weight relationship was described by the following parameters: a = 0.01 and b = 3.098. For each individual, morphometry of the whole otolith was described with several... |
| Tipo: Text |
Palavras-chave: Epinephelidae; Epinephelus radiatus; Otolith; Indian Ocean; Ageing; Otolith weight. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00313/42385/41723.pdf |
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| Roos, David; Rungassamy, Tévamie; Evano, Hugues; Varenne, Fanchon; Fry, Ludivine; Chapat, Melodie; Gallion, Nicolas; Huet, Jerome. |
| This study summarizes the results of the processing and analysis of data from illegal fisheries, apprehended by the eco-guards of the Marine Natural Reserve of Reunion from 2015 to 2017 (including the first dataset from 2018). These information are valued in terms of fisheries and bioecological knowledge for reef fish species. Thus, both diversity and abundance indices, size structures, growth parameters, stock characterization, can be apprehended from the biological parameters collected on all the species caught because they often do not exist : the sizes, weights, sexes, maturities, scales, otoliths, stomach contents as well as genetic and isotopic samples. These indices would contribute to a better diagnosis of the status and the sensitivity of stocks... |
| Tipo: Text |
Palavras-chave: Paramètres biologiques; Mesure biométrique; Maturité; Braconnage; Aire marine protégée; AMP; Réserve Naturelle Marine de La Réunion; Biological parameters; Biometric measurement; Maturity; Poaching; Marine protected area; MPA; La Reunion Marine Natural Reserve. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00469/58084/60487.pdf |
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| Roos, David; Dupont, Priscilla; Gaboriau, Matthias; Bigot, Lionel; Durville, Patrick; Mulochau, Thierry; Pinault, Mathieu; Wickel, Julien; Urbina-barreto, Isabel; Mouquet, Pascal; Maurel, Laurence; Cantou, Michel; Fallourd, Sophie; Guilbert, Antonin; Hoarau, Jean-marc; Aumond, Yoann; Huet, Jerome; Evano, Hugues; Sabathe, Yoann; Giannasi, Paul; Adami, Paul; Mercky, Yann; Jac, Cyrielle; Sucre, Elliott; Pelletier, Dominique; Claverie, Thomas. |
| For the first time ever at such a spatial scale, the EPICURE project is using the complementary exosystemic, functional and fisheries approaches to analyze and compare the partially exploited fish‐populating structure of the Geyser, Zélée, and Iris banks. This project focuses on three main points, which are 1) a habitat map of the three banks and an assessment of the live coral coverage as a proxy of the Geyser bank’s health, 2) a description of fish assemblages and a functional analysis relative to habitat type and time and 3) an estimate of the abundance index in structure size of the main exploited stocks. Overall, 42 habitats over 268 km² were mapped on the Geyser bank with 534 field verifications. On the Zélée bank, 24 habitats were mapped over 183... |
| Tipo: Text |
Palavras-chave: Peuplements ichtyologiques; Communautés récifales; Indicateurs populationnels; Approche fonctionnelle; Stocks halieutiques; Cartographie; Habitats; Bancs récifaux; Geyser; Iris; Zélée; Canal du Mozambique; Fish populating; Reef community; Population index; Functional approach; Fisheries stocks; Habitat map; Reef bank; Geyser; Zélée; Iris; Mozambican channel. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00434/54549/55924.pdf |
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| Berthou, Patrick; Guyader, Olivier; Weiss, Jerome; Demaneche, Sebastien; Roos, David; Reynal, Lionel; Le Blond, Samuel; Macabiau, Christophe; Martin-sosa, Pablo; Jimenez, Sebastián; Garcia-santamaria, María Teresa; Pascual-alayon, Pedro; Costa, Daniela; Vasconcelos, Joana. |
| Shared knowledge on fleets, gears-species and areas of operation, is essential to engage in a platform of exchange on low-impact offshore fishing techniques between fishers and stakeholders from different outermost regions. Information on small scale fisheries in Europe and especially in OR is often heterogeneous and dispersed. That is why it is fundamental to develop a systematic description – status and evolution - of small-scale fisheries in ORs to identify similarities and contrasts between the different ORs, especially in the perspective of fisheries management and more generally best practices. The general objective of the task 2.1.1 was to share knowledge about the status and evolution of small-scale fisheries in ORs according to a common... |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00628/74011/73334.pdf |
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| Pelletier, Dominique; Roos, David; Ciccione, Stéphane. |
| The ability of captive-reared turtles to survive in the wild is not precisely known, nor are movements of immature turtles in the open ocean. To provide information on these issues, a satellite tracking experiment was conducted in the western Indian Ocean to monitor oceanic movements of immature green turtles. Two wild turtles and four captive-reared individuals were tracked. The latter had been displaced after birth from nesting sites to a distant rearing site. Wild turtles survived after release, but did not move far away from release site. We hypothesize that this resident behaviour may be explained by stage-specific habitat requirements. Captive-reared turtles survived after release and migrated over thousands of kilometres. Among these, the oldest... |
| Tipo: Text |
Palavras-chave: Indian Ocean; Captive reared; Migration pattern; Satellite telemetry; Chelonia mydas; Marine turtle. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/2003/publication-573.pdf |
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| Blanchard, Fabian; Guyader, Olivier; Roos, David; Reynal, Lionel; Weiss, Jerome. |
| Ce rapport est une réponse à la saisine DPMA 18-13767 (annexe 1). Il propose dans une première partie une synthèse des productions par espèce pour la Guadeloupe, la Martinique, la Guyane, La Réunion et Mayotte, ainsi que l’effort de pêche par flottille/métiers pour ces territoires ultra-marins (rapport OBSDEB 2018, annexe 2) et une synthèse de l’état des stocks qui font l’objet d’une évaluation. La seconde partie du rapport est consacrée à un diagnostic de l’état des connaissances et des priorités d’acquisition de connaissance en vue d’une approche écosystémique de la gestion des pêcheries concernées. NB. Cette deuxième partie sera livrée fin avril 2019. |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00506/61723/65694.pdf |
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| Ramos, Henrique; Zanella, Andrea; Gomez, Cesar; Pavon-salas, Ninoska; Guyader, Olivier; Berthou, Patrick; Bilbao Sieyro, Alberto; Roos, David; Reynal, Lionel. |
| The database presented in this report is an exhaustive review of existing technical information on experimental fishing. This review has been done over a period covering the last 30 years based on available literature, databases and reports. For each outermost region (OR), several universities and public investigation centres have also been consulted. All the non-published reports and papers presented in this database will be gradually scanned and published on the ORFISH website in order to make them public |
| Tipo: Text |
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| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00628/74038/73370.pdf |
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| Ospina-alvarez, Andres; Catalan, Ignacio A.; Bernal, Miguel; Roos, David; Palomera, Isabel. |
| We show the application of a Spatially-Explicit Individual-Based Model (SEIBM) to understand the recruitment process of European anchovy. The SEIBM is applied to simulate the effects of inter-annual variability in parental population spawning behavior and intensity, and ocean dynamics, on the dispersal of eggs and larvae from the spawning area in the Gulf of Lions (GoL) towards the coastal nursery areas in the GoL and Catalan Sea (northwestern Mediterranean Sea). For each of seven years (2003-2009), we initialize the SEIBM with the real positions of anchovy eggs during the spawning peak, from an acoustics-derived eggs production model. We analyze the effect of spawners’ distribution, timing of spawning, and oceanographic conditions on the connectivity... |
| Tipo: Text |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00250/36156/34711.pdf |
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| Mahe, Kelig; Rabhi, Khalef; Bellamy, Elise; Elleboode, Romain; Aumond, Yoann; Huet, Jerome; Roos, David. |
| The brilliant pomfret (Eumegistus illustris) occurs in the western part of the Indian Ocean and the western and central Pacific Ocean. To date, the biology of E. illustris has never been documented. The aim of the present study was to investigate age and growth of E. illustris along the coasts of Reunion Island, based on calcified structures analysis. One hundred thirty five individuals were sampled in the landings of the French local artisanal fisheries from March 2014 to March 2015. The relationships between two types of body length (Total and Standard lengths, cm) and Total weight (g) were significant (P<0.05). Total length-weight relationship was described by the following parameters: a=0.012 and b=3.015 without significant effect of sexual... |
| Tipo: Text |
Palavras-chave: Eumegistus illustris; Growth; Scale; Otolith; Opercular bone; Indian Ocean; Reunion island. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00307/41861/41113.pdf |
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| Mahevas, Stephanie; Vermard, Youen; Hutton, Trevor; Iriondo, Ane; Jadaud, Angelique; Maravelias, Christos D.; Punzon, Antonio; Sacchi, Jacques; Tidd, Alex; Tsitsika, Efthymia; Marchal, Paul; Goascoz, Nicolas; Mortreux, Serge; Roos, David. |
| The impact of the fishing effort exerted by a vessel on a population depends on catchability, which depends on population accessibility and fishing power. The work investigated whether the variation in fishing power could be the result of the technical characteristics of a vessel and/or its gear or whether it is a reflection of inter-vessel differences not accounted for by the technical attributes. These inter-vessel differences could be indicative of a skipper/crew experience effect. To improve understanding of the relationships, landings per unit effort (lpue) from logbooks and technical information on vessels and gears (collected during interviews) were used to identify variables that explained variations in fishing power. The analysis was undertaken by... |
| Tipo: Text |
Palavras-chave: Catchability; Fishing power; GAM; GLM; Skipper skill; Technical characteristics. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00049/16043/15172.pdf |
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| Pethybridge, Heidi; Roos, David; Loizeau, Veronique; Pecquerie, Laure; Bacher, Cedric. |
| A size-structured, bioenergetics model was implemented to examine the effects of short-term environmental changes on European anchovy, Engraulis encrasicolus, in the North-western Mediterranean Sea. The model approach was based on Dynamic Energy Budget (DEB) theory and details the acquisition and allocation of energy (J d(-1)) during an organisms' full life-cycle. Model calibration was achieved using biometric data collected from the Gulf of Lions between 2002 and 2011. Bioenergetics simulations successfully captured ontogenetic and seasonal growth patterns, including active growth in spring/summer, loss of mass in autumn/winter and the timing and amplitude of multi-batch spawning events. Scenario analysis determined that vital rates (growth and fecundity)... |
| Tipo: Text |
Palavras-chave: Engraulis encrasicolus; NW Mediterranean Sea; Environmental variability; Dynamic Energy Budget theory; Growth; Fecundity. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00127/23822/22490.pdf |
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| Le Corre, Gildas; Jadaud, Angelique; Roos, David; Biseau, Alain. |
| L’avis sollicité par la DPMA auprès de l’Ifremer (en date du 20 mars 2012) concerne la détermination des objectifs de gestion des ressources exploitées et de la valeur des points de référence, tels que sollicités par les services de la DG-MARE comme une condition nécessaire pour poursuivre l’examen des plans de gestion français en vue de les déclarer conformes au règlement européen (CE)n° 1967/2006. Parallèlement, une procédure de précontentieux est actuellement engagée par la Commission vers la France concernant l'application de ce règlement cadre, dont l'échéance d'application des dérogations transitoires s'est terminée le 31 mai 2010. |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00110/22169/19822.pdf |
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| Registros recuperados: 57 | |
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