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| Registros recuperados: 97 | |
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| Bourjea, Jerome; Ribes, Sonia; Sauvignet, Hendrik. |
| Les objectifs de la missions étaient les suivants: PROJET TORTUES MARINES : (i) Prospection des îles de la côte ouest malgache pour récolter des échantillons génétiques de tortues verte et imbriquée dont l’analyse pourrait apporter des éléments essentiels dans la compréhension des liens qu’il existe entre le stock nord et sud de cette de cette zone ; (ii) finaliser la campagne de prélèvement génétique sur les immatures de tortues vertes présent dans le lagon de Juan de Nova PROJET ENTOMOLOGIE : (i) Inventaire de l’entomofaune et des autres arthropodes ; (ii) l’étude de l’écologie et de la biogéographie des îles éparses, à travers l’étude des phénomènes de spéciation et des réseaux trophiques ; (iii) constituer une collection de référence au Muséum... |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00244/35518/34023.pdf |
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| Lett, Christophe; Barrier, Nicolas; Ourmières, Yann; Petit, Cécile; Labonne, Maylis; Bourjea, Jerome; Darnaude, Audrey M.. |
| To investigate dispersal and connectivity between spawning and lagoon nursery habitats of the gilthead seabream, Sparus aurata, in the Gulf of Lions (northwestern Mediterranean Sea), we modeled the potential transport of the species’ larvae between its supposed main spawning site in the region (the Planier Island) and two of its main local nursery areas (the coastal lagoons of Thau and Salses-Leucate). Passive larval drift simulations using a dispersal biophysical model showed a large variability in the possible trajectories from spawning to nursery areas and in the predicted ages for larvae arrival on the two nursery sites. The most common ages at arrival obtained in the simulations (20–60 days) are broadly consistent with previous modeling studies but... |
| Tipo: Text |
Palavras-chave: Sparus aurata; Gulf of Lions; Fish; Larvae; Models-hydrodynamic; Biophysical model; Connectivity; Otolith. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00513/62470/66903.pdf |
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| Jean, Claire; Ciccione, Stephane; Ballorain, Katia; Georges, Jean-yves; Bourjea, Jerome. |
| Reunion Island in the south-west Indian Ocean once had significant nesting populations of marine turtles but they declined rapidly after human colonization. In 1996, after regular sightings of turtles offshore, an aerial survey programme was initiated to monitor the occurrence of marine turtles and their distribution along the west coast of the island Between 1998 and 2008, along a 30-km coastline transect between Saint Leu and Saint Paul, a total of 1,845 marine turtle sightings were recorded during 146 flights with an ultralight aircraft The mean number of turtle sightings per survey increased significantly between 1998 and 2008, and a variety of sizes were recorded throughout the year Marine turtles were found over coral reef zones and on the outer reef... |
| Tipo: Text |
Palavras-chave: Abundance; Aerial survey; Conservation; Indian Ocean; Marine turtles; Reunion Island. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00005/11588/9280.pdf |
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| Biseau, Alain; Bellail, Robert; Bertignac, Michel; Biais, Gerard; Bigot, Jean-louis; Bouche, Ludovic; Bourjea, Jerome; Caro, Anthony; De Casamajor, Marie-noelle; Caill-milly, Nathalie; Drogou, Mickael; Duhamel, Erwan; Fifas, Spyros; Foucher, Eric; Fromentin, Jean-marc; Jadaud, Angelique; Lampert, Luis; Laurans, Martial; Lissardy, Muriel; Lorance, Pascal; Mahe, Jean-claude; Mahe, Kelig; Masse, Jacques; Morandeau, Gilles; Pawlowski, Lionel; Poisson, Francois; Reynal, Lionel; Roos, David; Verin, Yves; Vermard, Youen; Vigneau, Joel. |
| Ce document présente l'état des principaux stocks exploités par les flottes françaises en termes de mortalité par pêche et de biomasse de reproducteurs. La situation fin 2010 (début 2011) par rapport aux points de référence (de précaution et Fmsy) est indiqué lorsque les indicateurs sont estimés et que les références sont définies. Les grandes tendances en matière d'évolution des mortalités et biomasses sont également indiquées. |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00035/14656/11956.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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| Bourjea, Jerome; Lapegue, Sylvie; Gagnevin, L; Broderick, D; Mortimer, J.a.; Ciccione, S; Roos, David; Taquet, Coralie; Grizel, Henri. |
| Patterns of mitochondrial DNA (mtDNA) variation were used to analyse the population genetic structure of southwestern Indian Ocean green turtle (Chelonia mydas) populations. Analysis of sequence variation over 396 bp of the mtDNA control region revealed seven haplotypes among 288 individuals from 10 nesting sites in the Southwest Indian Ocean. This is the first time that Atlantic Ocean haplotypes have been recorded among any Indo-Pacific nesting populations. Previous studies indicated that the Cape of Good Hope was a major biogeographical barrier between the Atlantic and Indian Oceans because evidence for gene flow in the last 1.5 million years has yet to emerge. This study, by sampling localities adjacent to this barrier, demonstrates that recent gene... |
| Tipo: Text |
Palavras-chave: Phylogeography; Mozambique Channel; Mitochondrial DNA; Indian Ocean; Control region; Chelonia mydas. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-2185.pdf |
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| Mahe, Kelig; Evano, Hugues; Mille, Tiphaine; Muths, D.; Bourjea, Jerome. |
| Swordfish Xiphias gladius is an oceanic-pelagic species. Its population structure in the Western Indian Ocean was studied from the shape of the sagittal otoliths of 391 individuals collected from 2009 to 2014. Normalised elliptical Fourier descriptors (EFDs) were extracted automatically using TNPC software. Principal components analysis (PCA) conducted on EFDs showed no significant effect of side (i.e. left or right otolith). Consequently, all 391 sagittal otoliths were used to identify stocks among six geographical areas: Reunion Island, Mozambique Channel, Rodrigues, South Africa, Madagascar South and Sri Lanka. To investigate the effects of sex, sampling year, sampling season, lower jaw fork length or geographical area on variations in otolith shape,... |
| Tipo: Text |
Palavras-chave: Connectivity; Fourier descriptors; Morphometric markers; Sagittal otoliths; Stock discrimination. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00354/46527/46411.pdf |
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| Wallace, Bryan P.; Dimatteo, Andrew D.; Hurley, Brendan J.; Finkbeiner, Elena M.; Bolten, Alan B.; Chaloupka, Milani Y.; Hutchinson, Brian J.; Alberto Abreu-grobois, F.; Amorocho, Diego; Bjorndal, Karen A.; Bourjea, Jerome; Bowen, Brian W.; Briseno Duenas, Raquel; Casale, Paolo; Choudhury, B. C.; Costa, Alice; Dutton, Peter H.; Fallabrino, Alejandro; Girard, Adrian; Girondot, Marc; Godfrey, Matthew H.; Hamann, Meike; Lopez-mendilaharsu, Milagros; Marcovaldi, Maria Angela; Mortimer, Jeanne A.; Musick, John A.; Nel, Ronel; Pilcher, Nicolas J.; Seminoff, Jeffrey A.; Troeng, Sebastian; Witherington, Blair; Mast, Roderic B.. |
| Background: Resolving threats to widely distributed marine megafauna requires definition of the geographic distributions of both the threats as well as the population unit(s) of interest. In turn, because individual threats can operate on varying spatial scales, their impacts can affect different segments of a population of the same species. Therefore, integration of multiple tools and techniques - including site-based monitoring, genetic analyses, mark-recapture studies and telemetry - can facilitate robust definitions of population segments at multiple biological and spatial scales to address different management and research challenges. Methodology/Principal Findings: To address these issues for marine turtles, we collated all available studies on... |
| Tipo: Text |
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| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00028/13926/11308.pdf |
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| Bourjea, Jerome; Frappier, Julie; Quillard, Mireille; Ciccione, Stephane; Roos, David; Hughes, Georges; Grizel, Henri. |
| Situated in the north of the Mozambique Channel, Mayotte is the easternmost island of the Comoros Archipelago. From 1998 to 2005, Grande Saziley beach was monitored daily for green turtle Chelonia mydas nesting activity. Track surveys were monitored daily on 5 other adjacent beaches. Although nesting occurs throughout the year, nesting seasonality begins at the end of the wet season and intensifies during the dry season to reach an average nesting peak in June. In order to estimate the number of females nesting in the Saziley site and population trends over the study period, incubation success and number of nests per female and per season were estimated at 0.77 (±0.05 SD) and 3.03 (±0.37) respectively. With an average of 1545 nesting turtles per year... |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00018/12916/9873.pdf |
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| Bourjea, Jerome; Dalleau, Mayeul. |
| Cette mission scientifique s’est déroulée dans le cadre du projet DYMITILE II (Dynamique Migratoire des Tortues marines nidifiant dans les Iles françaises de l’océan Indien) en vue de la rédaction des recommandations scientifiques pour la mise en place d’un plan national d’action pour la conservation de ces espèces dans les territoires français de l’océan Indien. Cette mission avait 3 objectifs principaux : - contribuer à la meilleure compréhension des voies migratoires des tortues vertes femelles en migration post reproductive dans les principaux sites de ponte du sud-ouest de l’océan Indien. Compte tenu du succès des précédents déploiements de balises, nous avons décidé de focaliser la mission sur les tortues dans la mangrove. - Contribuer à mieux... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00244/35515/34019.pdf |
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| Coelho, Rui; Nikolic, Natacha; Evano, Hugues; Miguel, N; Santos; Bourjea, Jerome. |
| This document presents a characterization of the Reunion Island pelagic longline fishery, with a first description of the albacore catches, catch-at-size, and the standardized catch per unit of effort (CPUE) series for the period 1992-2013. The spatial catch and effort analysis revealed the major areas of operation of the fishery, and the identification of the fishery core region closer to the Reunion Island area. The trends in the albacore catch-at-size were analyzed annually, and compared between the seasons and regions of operation of the fishery. The albacore nominal CPUEs were calculated as number of fish per 1000 hooks, and were standardized using Generalized Linear Models (GLMs). Four different modeling approaches were used (including Tweedie,... |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00208/31926/30344.pdf |
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| Mahe, Kelig; Bellamy, Elise; Bourjea, Jerome. |
| Ce guide présente les modes et règles de prélèvement des otolithes de légines australes à bord des navires professionnels de pêche puis d’envoi à l’institut scientifique IFREMER (Institut Français de Recherche pour l'Exploitation de la Mer ; www.ifremer.fr). La France qui exploite la légine en particulier dans les terres australes et antarctiques françaises (TAAF) à partir d’armements basés à l’île de La Réunion se doit de fournir des données biologiques et en particulier l’âge, aux instances d’évaluation de stock (CCAMLR - Commission for the Conservation of Antarctic Marine Living Resourceswww.ccamlr.org). |
| Tipo: Text |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00180/29135/27543.pdf |
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| Muths, Delphine; Tessier, Emmanuel; Gouws, G.; Craig, M.; Mwale, M.; Mwaluma, J.; Mwandya, A.; Bourjea, Jerome. |
| The reef fish Myripristis berndti (Jordan & Everman 1903) is a pantropical species. A genetic analysis was conducted on 353 individuals from 10 localities distributed across the SW Indian Ocean (SWIO) in order to determine patterns of connectivity in the SWIO. Both the mtDNA sequences (711-bp cytochrome b sequences) and the microsatellites (8 newly developed loci) reveal spatial patterns of differentiation within the SWIO. There is, however, a discrepancy between the structure observed with each kind of marker. MtDNA revealed that 3 peripheral populations (NW Kenya, SE Reunion, and SW Europa) were isolated from the 7 more central populations, which form a more densely connected population network, while microsatellite data indicated a more restricted... |
| Tipo: Text |
Palavras-chave: MtDNA; Microsatellite; Marine fish; SW Indian Ocean; Connectivity. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00073/18444/15974.pdf |
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| Registros recuperados: 97 | |
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