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| Registros recuperados: 97 | |
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| Chambault, Philippine; Hattab, Tarek; Mouquet, Pascal; Bajjouk, Touria; Jean, Claire; Ballorain, Katia; Ciccione, Stéphane; Dalleau, Mayeul; Bourjea, Jerome. |
| Despite the large number of species distribution modelling (SDM) applications driven by tracking data, individual information is most of the time neglected and traditional SDM approaches commonly focus on predicting the potential distribution at the species or population‐level. By running classical SDMs (population approach) with mixed models including a random factor to account for the variability attributable to individual (individual approach), we propose an innovative five‐steps framework to predict the potential and individual‐level distributions of mobile species using GPS data collected from green turtles. Pseudo‐absences were randomly generated following an environmentally‐stratified procedure. A negative exponential dispersal kernel was... |
| Tipo: Text |
Palavras-chave: GPS tracking; Green turtles; Indian Ocean; Pseudo-absences; Shannon index; Spatial modelling. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00682/79412/81963.pdf |
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| Nikolic, Natacha; Bourjea, Jerome. |
| Tunas are important commercial species that represent a share of about 8 percent of total fish exports. In 2010, the total catch of tuna in three oceans was about 6.6 million tons, 4.3 million tons for the most marketed species, a level roughly stable since 2002 (FAO 2012). Among these tuna species, there are in descending order of capture: skipjack tuna (Katsuwonus pelamis), yellowfin tuna (Thunnus albacares), bigeye tuna (Thunnus obesus), albacore tuna (Thunnus alalunga) and bluefin tuna (Thunnus thynnus). Overall, the biology of albacore stock in the Indian Ocean is not well known and there is relatively little new recent information on albacore stocks. Albacore life history characteristics, including a relatively late maturity, long life and sexual... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00160/27109/25289.pdf |
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| Rees, A. F.; Alfaro-shigueto, J.; Barata, P. C. R.; Bjorndal, K. A.; Bolten, A. B.; Bourjea, Jerome; Broderick, A. C.; Campbell, L. M.; Cardona, L.; Carreras, C.; Casale, P.; Ceriani, S. A.; Dutton, P. H.; Eguchi, T.; Formia, A.; Fuentes, M. M. P. B.; Fuller, W. J.; Girondot, M.; Godfrey, M. H.; Hamann, M; Hart, K. M.; Hays, G. C.; Hochscheid, S.; Kaska, Y.; Jensen, M. P.; Mangel, J. C.; Mortimer, J. A.; Naro-maciel, E.; Ng, C. K. Y.; Nichols, W. J.; Phillott, A. D.; Reina, R. D.; Revuelta, O.; Schofield, G.; Seminoff, J. A.; Shanker, K.; Tomas, J.; Van De Merwe, J. P.; Van Houtan, K. S.; Vander Zanden, H. B.; Wallace, B. P.; Wedemeyer-strombel, K. R.; Work, T. M.; Godley, B. J.. |
| In 2010, an international group of 35 sea turtle researchers refined an initial list of more than 200 research questions into 20 metaquestions that were considered key for management and conservation of sea turtles. These were classified under 5 categories: reproductive biology, biogeography, population ecology, threats and conservation strategies. To obtain a picture of how research is being focused towards these key questions, we undertook a systematic review of the peer-reviewed literature (2014 and 2015) attributing papers to the original 20 questions. In total, we reviewed 605 articles in full and from these 355 (59%) were judged to substantively address the 20 key questions, with others focusing on basic science and monitoring. Progress to answering... |
| Tipo: Text |
Palavras-chave: Sea turtle; Marine conservation; Evidence-based conservation; Systematic review; Research prioritisation. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00366/47698/47738.pdf |
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| Evano, Hugues; Bourjea, Jerome. |
| Within the IOSSS-ESPADON project (http://wwz.ifremer.fr/lareunion_eng/Projects/IOSSS-ESPADON), an atlas of the drifting longline fishery in the Indian Ocean has been achieved. It summarizes since 1950 the history of the longline fishery in the Indian Ocean in terms of fishing efforts and catches of swordfish. This Atlas also synthesized the evolution since 1994 of the La Réunion longline fishery activity (fishing efforts, catches and yields for the main targeted species). |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00115/22635/20361.pdf |
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| Bourjea, Jerome; Evano, Hugues; Hoarau, Ludovic; Satra Le Bris, Catherine; Meillon, Julien; Saintilan, Alexandre; Goudard, Erwann; Ropert, Michel. |
| Cet atlas interactif de la pêcherie palangrière de l'océan Indien a été réalisé dans la suite du projet IOSSSESPADON. Il synthétise d’une part, l'historique de la pêche palangrière de l'océan Indien depuis les années 1950 (efforts de pêche et captures d'espadon – Xiphias gladius par période de 5 ans et par rectangle statistique de 5°) et d’autre part, l'évolution de l'activité de la flottille palangrière réunionnaise depuis 1994 (efforts de pêche, captures et rendements pour les principales espèces ciblées). Pour le volet relatif à la Réunion, les données sont présentées : 1- annuellement par rectangle statistique de 5° (1994 – 2014), 2- annuellement ou par trimestre par rectangle statistique de 1° -2006 – 2014). Cet outil interactif permet une... |
| Tipo: Text |
Palavras-chave: Atlas; Cartographie; Pêche palangrière; Statistiques de pêche; Capture; Effort; Rendement; Océan Indien; Espadon; Thon Germon; Thon Albacore; Thon obèse; Grands pélagiques. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00272/38327/36568.pdf |
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| Le Couls, Sarah; Bourjea, Jerome. |
| Cette synthèse bibliographique présente les différentes commissions internationales de gestion des grands pélagiques dans les océans Indien, Atlantique et Pacifique, respectivement la CTOI, la CICTA et l'IATTC/WCPFC. De plus, cette synthèse focalise sur le cas de l'espadon Xiphias gladius et détaille pour chaque stock, les captures, l'état du stock ainsi que les mesures de gestion passées et en cours. Le stock de la Méditerranée est l'unique stock en état de surexploitation avéré et fait l'objet de mesures de gestion (interdiction des filets dérivants, fermeture saisonnière de la pêche) mais pas de TAC. Les stocks de l'Atlantique Nord, du Pacifique Sud-est, et de l'Océan Indien sont proches de la pleine exploitation voir en pleine exploitation. Parmi ces... |
| Tipo: Text |
Palavras-chave: Espadon; Évaluation de la ressource; Océan Atlantique; Océan Pacifique; Océan indien; Mediterranée; Pleine exploitation; TAC; Quota; Swordfish; Resources assessment; Atlantic ocean; Pacific ocean; Indien ocean; Mediterranean sea; Full exploitation; TAC; Quota. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00001/11211/7565.pdf |
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| Le Couls, Sarah; Bourjea, Jerome. |
| This review presents the different international fishery organizations in charge of the conservation of tunas and tuna-like species in the Indian, Atlantic and Pacific Oceans; respectively IOTC; ICCAT and IATTC/WCPFC. Moreover, this review also focuses on swordfish Xiphias gladius stock assessment and describes, for each stock worldwide, the total catches, the status of the stock as well as past and actual management measures. The Mediterranean stock is the only one assumed to be in overexploitation. This stock is currently under management measures (driftnet prohibition, seasonal fishery closure) but no TAC assigned. The north Atlantic, South-east Pacific and Indian Ocean stocks are close to or fully exploited. Among these stocks, only the North Atlantic... |
| Tipo: Text |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00018/12920/9877.pdf |
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| Bourjea, Jerome; Evano, Hugues; Muths, Delphine. |
| The main objective of the CAMP project (2009-2011) was to estimate the effective connectivity between Marine Protected Areas (MPA) in the southwest Indian Ocean (SWIO) through population genetics of 3 biological models Epinephelus merra, Lutjanus kasmira and Myripristis berndti. The ultimate goal is to provide scientific results for managers to contribute significantly to the design of the MPA network in SWIO. At the end of the project and thank to the cooperation with the Natural Marine Reserve of La Réunion and 5 international partners from the SWIO, 414 M. berndti, 623 L. kasmira and 731 E. merra were sampled in 16 different sites (Reunion, Mayotte, Geyser, Europa, Juan de Nova, Glorioso, Rodrigues, Mauritius, Moheli, Grande Comore, Seychelles, Kenya,... |
| Tipo: Text |
Palavras-chave: Aires Marines Protégées; Génétique des populations; Connectivité; Poisson corallien; Myripristis berndti; Epinephelus merra; Lutjanus kasmira : océan Indien. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00107/21808/19382.pdf |
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| Muths, Delphine; Bourjea, Jerome. |
| The main aim of the CAMP project (2009-2011) is to estimate the efficient connectivity between the Marine Protected Areas (MPA) of the South-West Indian Ocean (SWIO). For that purpose, we use a population genetics approach on 3 reef fishes: Epinephelus merra, Lutjanus kasmira et Myripristis berndti. The overall goal of the project is to provide new elements to MPA managers that will contribute to design the best network of MPAs in the SWIO. In the first year of the project, most of the time was spent to sample fishes. Based on collaborations with 5 international and national partners, we succeed to sample more than 1100 fishes within 12 sites of the SWIO. More than 850 of the 1100 fishes were already sequenced. The development of third microsatellite... |
| Tipo: Text |
Palavras-chave: Aires marines protégées; Génétique; Connectivité; Poissons de récif; Échantillonnage; Sud Ouest Océan Indien; Connectivité. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00100/21086/18710.pdf |
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| Muths, Delphine; Bourjea, Jerome. |
| Epinephelus merra (Serranidae) is the most common and widespread species of this genus, mostly found in reef habitats from South Africa to Central Pacific. Thirteen polymorphic microsatellite loci were isolated and characterized from this species. Polymorphism was studied in two localities from the Comoros archipelago-Moh,li and Moroni. Allelic diversity was 7.5, polymorphism ranging from 3 to 13 alleles. Overall heterozygosity was high with an average observed heterozygosity of 0.587. Three of these loci were characterised by heterozygote deficiencies for both populations. Finally, ten of the 13 developed primers could be used in future population genetics study of E.merra that might be useful in a context of marine biodiversity conservation. |
| Tipo: Text |
Palavras-chave: Microsatellite; Epinephelus merra; Reef fish; Indian ocean. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00044/15529/12957.pdf |
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| Chouvelon, Tiphaine; Brach-papa, Christophe; Auger, Dominique; Bodin, Nathalie; Bruzac, Sandrine; Crochet, Sylvette; Degroote, Maxime; Hollanda, Stephanie J.; Hubert, Clarisse; Knoery, Joel; Munschy, Catherine; Puech, Alexis; Rozuel, Emmanuelle; Thomas, Bastien; West, Wendy; Bourjea, Jerome; Nikolic, Natacha. |
| Albacore tuna (Thunnus alalunga) is a highly commercial fish species harvested in the world's Oceans. Identifying the potential links between populations is one of the key tools that can improve the current management across fisheries areas. In addition to characterising populations' contamination state, chemical compounds can help refine foraging areas, individual flows and populations' structure, especially when combined with other intrinsic biogeochemical (trophic) markers such as carbon and nitrogen stable isotopes. This study investigated the bioaccumulation of seven selected trace metals – chromium, nickel, copper (Cu), zinc (Zn), cadmium (Cd), mercury (Hg) and lead – in the muscle of 443 albacore tunas, collected over two seasons and/or years in the... |
| Tipo: Text |
Palavras-chave: Top predator; Bioaccumulation; Inorganic elements; Organic contaminants; Stable isotopes; Intrinsic markers. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00384/49532/51152.pdf |
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| 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 |
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| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00653/76483/77555.pdf |
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| Chambault, Philippine; Dalleau, Mayeul; Nicet, Jean-benoit; Mouquet, Pascal; Ballorain, Katia; Jean, Claire; Ciccione, Stéphane; Bourjea, Jerome. |
| Background A strong behavioural plasticity is commonly evidenced in the movements of marine megafauna species, and it might be related to an adaptation to local conditions of the habitat. One way to investigate such behavioural plasticity is to satellite track a large number of individuals from contrasting foraging grounds, but despite recent advances in satellite telemetry techniques, such studies are still very limited in sea turtles. Methods From 2010 to 2018, 49 juvenile green turtles were satellite tracked from five contrasting feeding grounds located in the South-West Indian Ocean in order to (1) assess the diel patterns in their movements, (2) investigate the inter-individual and inter-site variability, and (3) explore the drivers of their daily... |
| Tipo: Text |
Palavras-chave: Chelonia mydas; Home range; Satellite tracking; Diel pattern; Tidal cycle. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00601/71269/69659.pdf |
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| Nikolic, Natacha; Bourjea, Jerome. |
| Because one of the most common problems in fisheries is the definition of management units, we propose in this paper a bibliometric review focusing on the differentiation of Albacore populations, Thunnus alalunga, among and within oceanic regions (Atlantic, Pacific and Indian Oceans, and Mediterranean Sea). This paper is the first step of a current work on a global review of Albacore tuna using an international aquatic database (ASFA). For the present purpose, 367 publications, mainly composed of articles (64%), but also conference papers, proceedings and reports (24%), and books (12%), were analyzed. We will see that the concept of the stock and its delimitation is controversial because of the divergence of results. Such a conclusion makes us believe in... |
| Tipo: Text |
Palavras-chave: Albacore; Stock; Structure; Distribution; Thunnus alalunga. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00149/25990/24085.pdf |
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| Nikolic, Natacha; Duthoy, Stephanie; Destombes, Antoine; Bodin, Nathalie; West, Wendy; Puech, Alexis; Bourjea, Jerome. |
| Recent developments in sequencing technologies and bioinformatics analysis provide a greater amount of DNA sequencing reads at a low cost. Microsatellites are the markers of choice for a variety of population genetic studies, and high quality markers can be discovered in non-model organisms, such as tuna, with these recent developments. Here, we use a high-throughput method to isolate microsatellite markers in albacore tuna, Thunnus alalunga, based on coupling multiplex enrichment and next-generation sequencing on 454 GS-FLX Titanium pyrosequencing. The crucial minimum number of polymorphic markers to infer evolutionary and ecological processes for this species has been described for the first time. We provide 1670 microsatellite design primer pairs, and... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00293/40460/39151.pdf |
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| Bourjea, Jerome; Dalleau, Mayeul; Jean, Claire; Ciccione, Stephane. |
| Dans la suite de la mission à Europa en 2011, des missions menées depuis 2005 par les équipes d’Ifremer et de Kélonia, et dans le cadre de l’Action 4.2.3 du Plan National d’Action (PNA) tortues marines dans les îles Eparses, l’objectif de cette mission à Glorieuses et à Juan de Nova a été de continuer à acquérir des données sur la dynamique spatio-temporelle des immatures de tortues vertes présentes dans les îles Eparses. Plus précisément, cette mission a eu pour objectif de : 1- continuer la série longue de marquage –relecture de tortues vertes juvéniles présentes dans le lagon des Glorieuses et de Juan de Nova ainsi que les suivis de croissance des individus recapturés, 2- déterminer le comportement spatial à fine échelle des tortues vertes juvéniles... |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00260/37095/35605.pdf |
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| Registros recuperados: 97 | |
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