Consulta: creatorFacets:"Bourjea, Jerome"
Registros recuperados: 97
Data/hora: 16/06/2024 17:51:48

Rapport ObsDEB - Estimation 2014 des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane.
Provedor de dados: 5
Autores: Blanchard, Fabian; Lespagnol, Patrick; Weiss, Jerome; Demaneche, Sebastien; Bourjea, Jerome; Evano, Hugues; Reynal, Lionel; Guyader, Olivier; Baulier, Loic; Merrien, Claude; Leblond, Emilie; Daures, Fabienne; Berthou, Patrick; Leblond, Samuel.
Le programme d’observation des marées au débarquement, appelé « ObsDEB », contribue à l’estimation de l’effort de pêche et des captures des flottes de pêche françaises. Il vise tout particulièrement les flottilles de petite pêche côtière et procède à la collecte des informations requises selon un plan d’échantillonnage adapté à chaque région suivie. Ce rapport est le Rapport annuel de Convention DPMA-Ifremer 2015 et présente les estimations 2014 des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00326/43714/43159.pdf

Avis de l'Ifremer pour la création d'une zone de cantonnement au large de Brescou, commune d'Agde
Provedor de dados: 5
Autores: Bourjea, Jerome.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00585/69665/67539.pdf

Reproductive Biology of Albacore Tuna (Thunnus alalunga) in the Western Indian Ocean
Provedor de dados: 5
Autores: Dhurmeea, Zahirah; Zudaire, Iker; Chassot, Emmanuel; Cedras, Maria; Nikolic, Natacha; Bourjea, Jerome; West, Wendy; Appadoo, Chandani; Bodin, Nathalie.
The reproductive biology of albacore tuna, Thunnus alalunga, in the western Indian Ocean was examined through analysis of the sex ratio, spawning season, length-at-maturity (L50), spawning frequency and fecundity. From 2013 to 2015, a total of 923 female and 867 male albacore were sampled. A bias in sex ratio was found in favor of females with fork length (LF) &lt; 100 cm. Using histological analyses and gonadosomatic index, spawning was found to occur between 10°S and 30°S, mainly to the east of Madagascar from October to January. Large females contributed more to reproduction through their longer spawning period compared to small individuals. The L50 (mean ± standard error) of female albacore was estimated at 85.3 ± 0.7 cm LF. Albacore spawn on average...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00362/47284/47261.pdf

Connectivity and population structure of albacore tuna across southeast Atlantic and southwest Indian Oceans inferred from multidisciplinary methodology
Provedor de dados: 5
Autores: 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

Identification de la période la plus pertinente pour l'interdiction de 3 mois chaque année, de la pêche au chalut jusqu'à 6 milles marins de la côte en Corse (GSA 8)
Provedor de dados: 5
Autores: Jadaud, Angelique; Billet, Norbert; Bourjea, Jerome; Certain, Gregoire; Biseau, Alain.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00585/69668/67536.pdf

Seasonality, abundance, and fifteen-year trend in green turtle nesting activity at Itsamia, Moheli, Comoros
Provedor de dados: 5
Autores: Bourjea, Jerome; Dalleau, Mayeul; Derville, S.; Beudard, F.; Marmoex, C.; M'Soili, A.; Roos, David; Ciccione, S.; Frazier, J.
Nesting green turtles Chelonia mydas were studied at Moheli Island, Union of Comoros, southwestern Indian Ocean (SWIO). Five contiguous beaches near Itsamia village, in the southeastern part of the island, were monitored daily for nesting activity from January 1999 to June 2007 and irregularly between August 2009 and December 2014; nesting success was recorded from 2000 to 2006. Nesting occurred year-round and peaked in the austral winter, from March through August, with the highest values in May. During the 7 yr period when nesting success was recorded, 63164 successful nestings were reported, and the total was 69630 when estimates of missing data were included. The average rate of nesting success was 0.49 (SD = 0.04, n = 7). Using the estimate of 3.03...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00266/37733/35745.pdf

Synthèse 2017 de l’observation des efforts et débarquements des pêcheries côtières. Estimation des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane pour les navires de moins de 12m.
Provedor de dados: 5
Autores: Weiss, Jerome; Demaneche, Sebastien; Evano, Hugues; Guyader, Olivier; Bourjea, Jerome; Derridj, Olivier; Reynal, Lionel; Mansuy, Emmanuel; Berthou, Patrick; Leonardi, Sophie; Rostiaux, Emilie; Leblond, Emilie; Le Blond, Samuel.
Le programme d’observation des marées au débarquement, appelé « ObsDEB », contribue à l’estimation de l’effort de pêche et des captures des flottes de pêche françaises. Il vise tout particulièrement les flottilles de petite pêche côtière et procède à la collecte des informations requises selon un plan d’échantillonnage adapté à chaque région suivie. Ce rapport est le Rapport annuel de Convention DPMA-Ifremer 2017 et présente les estimations 2017 des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane.
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00478/58970/61577.pdf

Long-Term Monitoring of Green Turtle Nesting on Tromelin Island Demonstrates Stable Reproduction and Population Parameters
Provedor de dados: 5
Autores: Derville, Solene; Jean, Claire; Dalleau, Mayeul; Le Gal, Jean-yves; Ciccione, Stephane; Bourjea, Jerome.
Situated about 500 km off the Malagasy east coast, the island of Tromelin is a key nesting site for the endangered green turtle, Chelonia mydas, in the south Western Indian Ocean. Nesting turtles found in this isolated island have been closely monitored since the 1970s, but the most recent estimates of nesting parameters date from 1986. Using mark-recapture data, track counts, and nests monitoring data collected over the 2009/2010 nesting peak, reproductive characteristics, population size, and offspring production were updated and discussed in the light of the track survey undertaken from 1986 to 2010. Females showed a consistent reproductive behaviour compared with previous studies in terms of clutch frequency (2.75 +/- 1.46) and nesting success (0.65)....
Tipo: Text
Palavras-chave: Reptilia Testudines: Cheloniidae Chelonia mydas; Green turtle nesting activity population assessment Indian Ocean Tromelin Island.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00273/38424/36794.pdf

Oceanic connectivity by green turtle ine the WIO
Provedor de dados: 5
Autores: Bourjea, Jerome; Dalleau, Mayeul.
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00272/38325/36566.pdf

UE - France. Rapport national destiné au Comité scientifique de la Commission des thons de l’océan Indien 2013-2014
Provedor de dados: 5
Autores: Chavance, Pierre; Chassot, Emmanuel; Bourjea, Jerome; Evano, Hugues; Huet, Jerome; Bach, Pascal; Sabarros, Philippe.
Pour ce qui concerne la France (excluant Mayotte), trois flottilles ont des activités de pêche thonière dans l'océan Indien : - les senneurs opérant pour l’essentiel à partir des Seychelles et de l’Ile Maurice, - les palangriers basés à La Réunion, et à un moindre degré la petite pêche réunionnaise. - La flottille thonière française à la senne exerçant dans l’océan Indien atteint 8 navires en 2013 et ses capture se sont élevées à 39 958 tonnes, soit un niveau légèrement supérieur à celui de 2012 (37 155 t) avec une légère augmentation de l’effort de pêche (2 291 jours de pêche en 2013 et 1 944 jours en 2012). Le programme observateur mis en place depuis 2005, qui a permis de fournir les premières évaluations des rejets et des prises accessoires en 2008, a...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00239/35015/33552.pdf

EU purse seine fishery interaction with marine turtles in the Atlantic and Indian Oceans: a 15 years analyses
Provedor de dados: 5
Autores: Clermont, Sandra; Chavance, Pierre; Delgado De Molina, Alicia; Murua, Hilario; Ruiz, Jon; Ciccione, Stephane; Bourjea, Jerome.
Bycatch of marine turtles, vulnerable or endangered species, is a growing issue of all fisheries, including Oceanic purse-seine fishery. The present paper seeks to assess marine turtle bycatch at a spatial and temporal level in the European purse seine fishery operating in the Atlantic and Indian Oceans. The study was based on data collected through French and Spanish observer programs from 1995 to 2011, a period where more than 230 000 fishing sets were realized by the UE fleets in both Oceans. A total of 15 913 fishing sets were observed, including 6 515 on drifting Fish Aggregate Devices (FAD) and 9 398 on Free Swimming Schools (FSC). Over the study period, 597 turtles were caught, 86% being released alive at sea. At the same time, from 2003 to 2011, 14...
Tipo: Text
Palavras-chave: European tuna fishery; Purse seine; Marine turtle; Bycatch; Atlantic and Indian Oceans.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00149/25991/24087.pdf

Marine turtle interaction with purse-seine fishery in the Atlantic and Indian oceans: Lessons for management
Provedor de dados: 5
Autores: Bourjea, Jerome; Clermont, Sandra; Delgado, Alicia; Murua, Hilario; Ruiz, Jon; Ciccione, Stephane; Chavance, Pierre.
Bycatch of endangered marine turtles is a growing issue for the management of all fisheries, including the oceanic purse-seine fishery. The aim of this study was to assess the spatial and temporal variation in bycatch rates of these species in the entire European purse-seine fishery operating in the Atlantic and Indian oceans. The study was based on data collected through observer programs from 1995 to 2011. During that period, a total of 15 913 fishing sets were observed, including 6 515 on Drifting Fish Aggregating Devices (DFADs) and 9 398 on free swimming schools, representing a global coverage of 10.3% and 5.1% of the total fishing activity in the Atlantic and Indian Ocean, respectively. Moreover, from 2003 to 2011, 14 124 specific observations were...
Tipo: Text
Palavras-chave: Bycatch; Marine turtle; Fishery impacts; Fishery management; Atlantic Ocean; Indian Ocean.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00206/31760/30632.pdf

Glorieuses 2009. Mission pluridisciplinaire Tortues / Aires Marines Protegees. Rapport de mission du 23 mai au 5 juin 2009. Mission Ifremer/Kelonia/Cnrs/Arvam/Aamp
Provedor de dados: 5
Autores: Bourjea, Jerome; Benhamou, Simon; Mouquet, Pascal; Quod, Jean-pascal.
Les objectifs de la missions étaient les suivants:  Composante 1 « Tortue » : cette composante est divisée en deux volets : (i) Etude des Processus de navigation des tortues vertes dans le sud ouest de l'océan Indien. Sur la base de 12 tortues déplacées à 100 milles de leur plage de ponte, en direction du sud ouest, afin de disposer d'un point de lâcher éloigné des principales îles de la région (Comores, Mayotte, Madagascar, Seychelles), les processus de navigation et d’orientation en fonction du champs magnétique terrestre et des courants seront étudiées grâce à des balises Argos. Cette composante est très semblable au travail qui a été menée lors de la mission Glorieuses 2008. (ii) Importance des îles du Sud Ouest de l’océan Indien en tant qu’habitat de...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00244/35517/34022.pdf

France -Territoires - Rapport national destiné au Comité scientifique de la Commission des thons de l'océan Indien, pour sa réunion annuelle 2013-2014. Informations sur les pêcheries, les recherches et les statistiques
Provedor de dados: 5
Autores: Chavance, Pierre; Herfaut, Johanna; Bourjea, Jerome; Chassot, Emmanuel.
Les outre-mer français de l’océan indien incluent Mayotte, Département depuis le 31 mars 2011 et les îles Eparses qui sont rattachées à l’administration supérieure des Terres Australes et Antarctiques françaises (TAAF). Depuis janvier 2010, Mayotte dispose d’un parc naturel marin (PNM) doté d’un conseil de gestion dont les limites maritimes sont celles de la ZEE de Mayotte. Un second parc naturel marin a été créé le 22 février 2012 (décret n°2012-245 du 22 février 2012), il s’agit du PNM des Glorieuses, qui dépend des îles Eparses, qui s’étend sur l’ensemble de la ZEE des Glorieuses. Les captures totales dans l’océan Indien des 5 senneurs français immatriculés à Mayotte se sont élevées en 2013 à 26 000 tonnes, soit une diminution de 10% par rapport à 2012...
Tipo: Text
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00239/35016/33553.pdf

Genetic population structure of the Swordfish (Xiphias gladius) in the southwest Indian Ocean: Sex-biased differentiation, congruency between markers and its incidence in a way of stock assessment
Provedor de dados: 5
Autores: Muths, Delphine; Grewe, R.; Jean, Claire; Bourjea, Jerome.
Genetic variation was surveyed at 11 microsatellite loci and at 517 bp of the mitochondrial control region to investigate the presence of genetic stock structure in swordfish (Xiphias gladius) in four proximal localities of the southwest Indian Ocean. One aim of this study was to serve as a preliminary examination for congruency of structure detected by these two genetic markers, prior to conducting a more comprehensive basin-wide survey of the Indian Ocean and nearby surrounding areas. Analyses of multilocus microsatellite genotypes and mitochondrial control region sequences both revealed a great homogeneity between samples. Genetic diversity detected at the regional scale was not significantly higher than detected at the local scale. Results suggest that...
Tipo: Text
Palavras-chave: Indian Ocean; Population genetic; MtDNA; Microsatellites; Swordfish.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6455.pdf

Guide de prélèvements des otolithes chez les grands pélagiques
Provedor de dados: 5
Autores: Evano, Hugues; Metral, Luisa; Brisset, Blandine; Bourjea, Jerome; Nikolic, Natacha; Mahe, Kelig.
Ce guide présente les modes et règles de prélèvement puis de stockage des otolithes de grands pélagiques (thons et espadons). Ils ont été mis en place dans le cadre de projets de recherche comme « Germon » (http://wwz.ifremer.fr/lareunion/Les-projets/GERMON-en-cours), « IOSSS-Espadon » (http://wwz.ifremer.fr/lareunion/Les-projets/IOSSS-ESPADON) et «thon rouge (ICCAT-GBYP) » et dans le cadre de réseaux de surveillance coordonnés au niveau international, en particulier au sein du règlement européen sur la collecte des données halieutiques (DCMAP, Data Collection Multi Annual Programme). Ce guide a pour but de standardiser les prélèvements d’otolithes effectués à l'Ifremer sur ces grands pélagiques. Il reprend et complète la synthèse française des procédures...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00212/32318/30767.pdf

Reunion longline swordfish catch rate standardization
Provedor de dados: 5
Autores: Kolody, Dale; Poisson, Francois; Bourjea, Jerome.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00129/24055/22020.pdf

Spatial variation in stable isotopes and fatty acid trophic markers in albacore tuna (Thunnus alalunga) from the western Indian Ocean
Provedor de dados: 5
Autores: Dhurmeea, Zahirah; Pethybridge, Heidi; Langlais, Clothilde; Somes, Christopher J.; Nikolic, Natacha; Bourjea, Jerome; Appadoo, Chandani; Bodin, Nathalie.
Albacore tuna (Thunnus alalunga) is a highly economically important species in the western Indian Ocean. However, knowledge of its ecological and nutritional characteristics, essential for proper management of the species, is lacking in the region. The trophodynamics of the Indian Ocean albacore was thus examined using known fatty acid trophic markers (FATMs) of primary producers, nutritional condition indices (NCIs) (omega-3/omega-6 ratio and total fatty acid content (TFA)), and baseline and lipid corrected stable isotope of carbon (δ13Ccorr) and nitrogen (δ15Ncorr), measured in the muscle tissue. We applied generalized additive mixed models to understand the spatiotemporal patterns and drivers of these tracers, taking into consideration several intrinsic...
Tipo: Text
Palavras-chave: Trophodynamics; Phytoplankton; Environmental parameters; Climate change.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00623/73497/72787.pdf

Bilan de l’état des stocks et des mesures de gestion de l’espadon xiphias gladius dans les océans Atlantique, Pacifique, Indien et en mer Méditerranée
Provedor de dados: 5
Autores: 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
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00018/12920/9877.pdf

Modeling the emergence of migratory corridors and foraging hot spots of the green sea turtle
Provedor de dados: 5
Autores: Dalleau, Mayeul; Kramer‐schadt, Stephanie; Gangat, Yassine; Bourjea, Jerome; Lajoie, Gilles; Grimm, Volker.
Environmental factors shape the spatial distribution and dynamics of populations. Understanding how these factors interact with movement behavior is critical for efficient conservation, in particular for migratory species. Adult female green sea turtles, Chelonia mydas, migrate between foraging and nesting sites that are generally separated by thousands of kilometers. As an emblematic endangered species, green turtles have been intensively studied, with a focus on nesting, migration, and foraging. Nevertheless, few attempts integrated these behaviors and their trade‐offs by considering the spatial configurations of foraging and nesting grounds as well as environmental heterogeneity like oceanic currents and food distribution. We developed an...
Tipo: Text
Palavras-chave: Connectivity; Corridors; Individual-based model; Migration; Movement; Sea turtle.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00512/62337/66597.pdf

Muscle bioenergetics of two emblematic Mediterranean fish species: Sardina pilchardus and Sparus aurata
Provedor de dados: 5
Autores: Teulier, Loïc; Thoral, Elisa; Queiros, Quentin; Mckenzie, David; Roussel, Damien; Dutto, Gilbert; Gasset, Eric; Bourjea, Jerome; Saraux, Claire.
We investigated links between swimming behavior and muscle bioenergetics in two emblematic Mediterranean fish species that have very different ecologies and activity levels. European sardines Sardina pilchardus are pelagic, they swim aerobically, school constantly and have high muscle fat content. Gilthead seabream Sparus aurata are bentho-pelagic, they show discontinuous spontaneous swimming patterns and store less fat in their muscle. Estimating the proportion of red and white muscle phenotypes, sardine exhibited a larger proportion of red muscle (~10% of the body mass) compared to gilthead seabream (~5% of the body mass). We firstly studied red and white muscle fiber bioenergetics, using high-resolution respirometers, showing a 4-fold higher oxidation...
Tipo: Text
Palavras-chave: Red muscle; Bioenergetics; Marine fishes; Lipids.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00502/61390/65054.pdf

Seascape Genetics and the Spatial Ecology of Juvenile Green Turtles
Provedor de dados: 5
Autores: Jensen, Michael P.; Dalleau, Mayeul; Gaspar, Philippe; Lalire, Maxime; Jean, Claire; Ciccione, Stéphane; Mortimer, Jeanne A.; Quillard, Mireille; Taquet, Coralie; Wamukota, Andrew; Leroux, Géraud; Bourjea, Jerome.
Understanding how ocean currents impact the distribution and connectivity of marine species, provides vital information for the effective conservation management of migratory marine animals. Here, we used a combination of molecular genetics and ocean drift simulations to investigate the spatial ecology of juvenile green turtle (Chelonia mydas) developmental habitats, and assess the role of ocean currents in driving the dispersal of green turtle hatchlings. We analyzed mitochondrial (mt)DNA sequenced from 358 juvenile green turtles, and from eight developmental areas located throughout the Southwest Indian Ocean (SWIO). A mixed stock analysis (MSA) was applied to estimate the level of connectivity between developmental sites and published genetic data from...
Tipo: Text
Palavras-chave: Chelonia mydas; Green turtle; Juvenile; MtDNA; Drifting simulation; Connectivity; Mixed stock analysis; Southwest Indian Ocean.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00612/72443/71398.pdf

Characterization of thirteen new polymorphic microsatellite markers from the honeycomb grouper Epinephelus merra
Provedor de dados: 5
Autores: 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

Les îles Éparses : vingt-cinq ans de recherche sur les tortues marines
Provedor de dados: 5
Autores: Bourjea, Jerome; Ciccione, Stephane; Lauret-stepler, Marie; Marmoex, Cyril; Jean, Claire.
Depuis le milieu des années 70, les activités de recherche sur les tortues marines des îles Éparses se sont développées de manière constante. Elles ont mis en évidence l’importance des quatre îles Éparses émergées (Europa, Juan de Nova, Glorieuses et Tromelin) qui font partie des principaux sites de ponte des tortues vertes (Chelonia mydas) de l’océan Indien et qu’elles appartiennent à 2 stocks génétiques différents pour l’espèce. Mais ces îles ne sont pas que des réservoirs de générations futures. Plus récemment, il a été montré qu’elles sont également des habitats primordiaux pour le développement des Tortues vertes et imbriquées (Eretmochelys imbricata) immatures qui y trouvent une protection contre les prédateurs et de la nourriture. L’ensemble des...
Tipo: Text
Palavras-chave: Îles Éparses; Océan Indien; Chelonia mydas; Eretmochelys imbricata; Stock; Migration; Capture accidentelle; Éparses Islands; Indian Ocean; Chelonia mydas; Eretmochelys imbricata; Stock; Migration; By-catch.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00073/18455/15999.pdf

Farmed bivalve loss due to seabream predation in the French Mediterranean Prevost Lagoon
Provedor de dados: 5
Autores: Richard, Marion; Forget, Fabien; Mignucci, Alexandre; Mortreux, Serge; Le Gall, Patrik; Callier, Myriam; Weise, Am; Mckindsey, Cw; Bourjea, Jerome.
Bivalve predation by seabream has been observed worldwide and is a major concern for bivalve farmers. Farmed bivalve-seabream interactions must be better understood to ensure the sustainability of bivalve aquaculture. The objectives of this study were to characterize gilthead seabream Sparus aurata presence in a bivalve farm in Prevost Lagoon (Mediterranean Sea) using acoustic telemetry and to evaluate monthly losses of mussels Mytilus galloprovincialis and oysters Crassostrea gigas due to seabream predation over an 18 mo period inside the farm and at an unprotected experimental platform. Large (281 to 499 mm TL) seabream were more commonly detected in the bivalve farm than were small (200 to 280 mm TL) seabream. In contrast to small seabream, 90% of large...
Tipo: Text
Palavras-chave: Shellfish culture; Sparus aurata; Size; Acoustic telemetry; Crassostrea gigas; Mytilus galloprovincialis; Oyster; Mussel.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00663/77515/79299.pdf

Population structure enhances perspectives on regional management of the western Indian Ocean green turtle
Provedor de dados: 5
Autores: Bourjea, Jerome; Mortimer, Jeanne A.; Garnier, Julie; Okemwa, Gladys; Godley, Brendan J.; Hughes, George; Dalleau, Mayeul; Jean, Claire; Ciccione, Stephane; Muths, Delphine.
To refine our understanding of the spatial structure of the green turtle (Chelonia mydas) populations in the South West Indian Ocean (SWIO), we analysed patterns of mitochondrial DNA (396 base pairs control region fragment) variation among 171 samples collected at five distinct locations (Kenya, Northern Mozambique, and three locations in the Republic of Seychelles: the Granitic, Amirantes, and Farquhar groups) and compared them to genetic data (n = 288), previously collected from 10 southern locations in the SWIO. We also analysed post-nesting satellite tracks (n = 4) from green turtles nesting in the Amirantes group. Pairwise comparisons of haplotype frequencies showed significant genetic differentiation amongst rookeries and suggest that the SWIO hosts...
Tipo: Text
Palavras-chave: Indian Ocean; MtDNA; Satellite tracking; Phylogeography; Management unit; Chelonia mydas.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00266/37732/36062.pdf

UE - France. Rapport national destiné au Comité scientifique de la Commission des thons de l’océan Indien, 2012-2013
Provedor de dados: 5
Autores: Chavance, Pierre; Chassot, Emmanuel; Bourjea, Jerome; Evano, Hugues; Nadeau, Aurelie; Bach, Pascal; Marsac, Francis; Dagorn, Laurent.
Pour ce qui concerne la France (excluant Mayotte), trois flottilles ont des activités de pêche thonière dans l'Océan Indien : (1) les senneurs opérant pour l’essentiel à partir des Seychelles et de l’Ile Maurice, - les palangriers basés à La Réunion, et à un moindre degré la petite pêche réunionnaise. La flottille thonière française à la senne exerçant dans l’océan Indien atteint 10 navires en 2012 et ses capture se sont élevées à 37 155 tonnes, soit un niveau sensiblement inférieur à celui de 2011 (42 894 t) avec une légère diminution de l’effort de pêche (1 944 jours de pêche en 2012 et 2 109 jours en 2011). Le programme observateur mis en place depuis 2005, qui a permis de fournir les premières évaluations des rejets et des prises accessoires en 2008, a...
Tipo: Text
Ano: 2013
URL: https://archimer.ifremer.fr/doc/00166/27716/25909.pdf

Genetic structure of the reef grouper Epinephelus merra in the West Indian Ocean appears congruent with biogeographic and oceanographic boundaries
Provedor de dados: 5
Autores: Muths, Delphine; Tessier, Emmanuel; Bourjea, Jerome.
The reef fauna connectivity of the West Indian Ocean (WIO) is one of the least studied globally. Here we use genetic analyses of the grouper Epinephelus merra (Bloch 1793) to determine patterns of connectivity and to identify barriers to dispersal in this WIO marine area. Phylogeographic and population-level analyses were conducted on cytochrome b sequences and microsatellites (13 loci) from 557 individuals sampled in 15 localities distributed across the West Indian Ocean. Additional samples from the Pacific Ocean were used to benchmark the WIO population structure. The high level of divergence revealed between Indian and Pacific localities (of about 4.5% in sequences) might be the signature of the major tectonic and climatic changes operating at the...
Tipo: Text
Palavras-chave: Cytochrome b; Marine connectivity; Microsatellite; Reef fish; West Indian Ocean.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00189/30046/28566.pdf

Characterisation of 22 polymorphic microsatellite loci for the Broadbill Swordfish, Xiphias gladius
Provedor de dados: 5
Autores: Bradman, H.; Grewe, P.; Bourjea, Jerome; Muths, Delphine; Appleton, B.
The Broadbill Swordfish is harvested by fisheries throughout the world. In order to devise more effective management strategies, we need a clear understanding of the population structure of the species. From a library of 29 tetranucleotide repeats, 22 microsatellite markers were characterised for 94 swordfish samples captured from eastern and western Australia. The number of alleles ranged from 2 to 26 and observed heterozygosity from 0.066 to 0.923. We have identified 18 microsatellites that will be valuable in the examination of swordfish population structure.
Tipo: Text
Palavras-chave: Swordfish; Xiphias gladius; Microsatellite; Genetic markers.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00037/14805/12428.pdf

Minute Report of the 1st workshop on joint analysis of sea turtle mitigation effectiveness. Honolulu, USA, 16–19 February 2016
Provedor de dados: 5
Autores: Bourjea, Jerome.
The Areas Beyond National Jurisdiction (ABNJ, or Common Oceans) Tuna Project is a Global Environment Facility (GEF)-funded, FAO-implemented programme of work designed to encourage and reinforce sustainable tuna fisheries. One of the three main components of the project focuses on mitigating bycatch and ameliorating adverse impacts on biodiversity. Taking its cue from a work plan developed by the Joint t-RFMO Technical Working Group- Bycatch, the ABNJ Tuna Project aims to progress prioritized research on sea turtle bycatch mitigation through encouraging data sharing and collaborative analysis (Joint Tuna RFMOs 2011). Funding has been allocated to WCPFC and The Pacific Community (SPC) under the ABNJ work programme to support two sets of workshops on bycatch...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00366/47693/80260.pdf

Glorieuses 2008. Mission Tortue du 4 au 7 mai 2008. Rapport de mission scientifique dans les Eparses
Provedor de dados: 5
Autores: Bourjea, Jerome; Benhamou, Simon.
Les objectifs de cette mission étaient les suivants :  Composante 1 : Etude des Processus de navigation des tortues vertes dans le sud ouest de l'Océan Indien. Sur la base de 12 tortues déplacées à 100 milles de leur plage de ponte, en direction de l'ouest, afin de disposer d'un point de lâcher éloigné des principales îles de la région (Comores, Mayotte, Madagascar, Seychelles), les processus de navigation et d’orientation en fonction du champs magnétique terrestre et des courants seront étudiées grâce à des balises Argos. Composante 2 : Importance des îles du Sud Ouest de l’océan Indien en tant qu’habitat de développement pour les tortues marines. Dans la continuité des missions réalisées ces 3 dernières années dans les îles Eparses, une campagne de...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00244/35516/34021.pdf

Discovery of Genome-Wide Microsatellite Markers in Scombridae: A Pilot Study on Albacore Tuna
Provedor de dados: 5
Autores: 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
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00293/40460/39151.pdf

Similar circling movements observed across marine megafauna taxa
Provedor de dados: 5
Autores: Narazaki, Tomoko; Nakamura, Itsumi; Aoki,, Kagari; Iwata, Takashi; Shiomi, Kozue; Luschi, Paolo; Suganuma, Hiroyuki; Meyer, Carl G.; Matsumoto, Rui; Bost, Charles A.; Handrich, Yves; Amano, Masao; Okamoto, Ryosuke; Mori, Kyoichi; Ciccione, Stephane; Bourjea, Jerome; Sato, Katsufumi.
Advances in biologging technology have enabled 3D dead-reckoning reconstruction of marine animal movements at spatiotemporal scales of meters and seconds. Examining high-resolution 3D movements of sharks (Galeocerdo cuvier, N = 4; Rhincodon typus, N = 1), sea turtles (Chelonia mydas, N = 3), penguins (Aptenodytes patagonicus, N = 6), and marine mammals (Arctocephalus gazella, N = 4; Ziphius cavirostris, N = 1), we report the discovery of circling events where animals consecutively circled more than twice at relatively constant angular speeds. Similar circling behaviors were observed across a wide variety of marine megafauna, suggesting these behaviors might serve several similar purposes across taxa including foraging, social interactions, and navigation.
Tipo: Text
Palavras-chave: Ecology; Biological Sciences; Zoology; Animals; Ethology.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00685/79664/82429.pdf

Isolation and characterization of thirteen polymorphic microsatellite markers from the bluestriped snappers Lutjanus kasmira and L. Bengalensis
Provedor de dados: 5
Autores: Bonizzoni, Mariangela; Bourjea, Jerome; Chen, Bin; Crain, B. J.; Cui, Liwang; Fiorentino, V.; Hartmann, S.; Hendricks, S.; Ketmaier, V.; Ma, Xiaoguang; Muths, Delphine; Pavesi, L.; Pfautsch, S.; Rieger, M. A.; Santonastaso, T.; Sattabongkot, Jetsumon; Taron, C. H.; Taron, D. J.; Tiedemann, R.; Yan, Guiyun; Zheng, Bin; Zhong, Daibin.
This article documents the addition of 92 microsatellite marker loci to the Molecular Ecology Resources Database. Loci were developed for the following species: Anopheles minimus, An. sinensis, An. dirus, Calephelis mutica, Lutjanus kasmira, Murella muralis and Orchestia montagui. These loci were cross-tested on the following species: Calephelis arizonensi, Calephelis borealis, Calephelis nemesis, Calephelis virginiensis and Lutjanus bengalensis.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00042/15373/13513.pdf

Bilan de l'état des stocks et des mesures de gestion de l'espadon (xiphias gladius) dans les océans Atlantique, pacifique et indien et en mer Méditerranée
Provedor de dados: 5
Autores: 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

UE - France : Rapport national destiné au Comité scientifique de la Commission des thons de l’océan Indien, 2011-2012
Provedor de dados: 5
Autores: Chavance, Pierre; Chassot, Emmanuel; Bourjea, Jerome; Evano, Hugues; Nadeau, Aurelie; Bach, Pascal; Marsac, Francis; Dagorn, Laurent.
Pour ce qui concerne la France, trois flottilles ont des activités de pêche thonière dans l'Océan Indien : - les senneurs opérant pour l’essentiel à partir des Seychelles, - les palangriers basés à La Réunion, et à un moindre degré la petite pêche réunionnaise. La flottille thonière française à la senne exerçant dans l’océan Indien atteint 8 navires en 2011 et ses capture se sont élevées à 42 900 tonnes, soit un niveau sensiblement inférieur à celui de 2010 (47 000 t) malgré une stabilité de l’effort de pêche (2 109 jours de pêche en 2011 et 2 132 jours en 2010). Le programme observateur mis en place depuis 2005, qui a permis de fournir les premières évaluations des rejets et des prises accessoires en 2008, a du être stoppé mi 2009 pour raison de sécurité,...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00109/21983/19599.pdf

Atlas de la pêche palangrière réunionnaise de l'océan Indien
Provedor de dados: 5
Autores: 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
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00115/22635/20361.pdf

Short review on biology, structure, and migration of thunnus alalunga in the indian ocean
Provedor de dados: 5
Autores: Nikolic, Natacha; Fonteneau, Alain; Hoarau, Ludovic; Morandeau, Gilles; Puech, Alexis; Bourjea, Jerome.
The most comprehensive contribution to our understanding of albacore tuna, Thunnus alalunga, comes from studies in the Pacific and Atlantic Ocean. In the Indian Ocean, there is little information about this species in the literature. In the present paper, we propose a short review on albacore in the Indian Ocean with a particular attention on the biology, the structure, and the migration. We focused on these fields because they are key components of stock assessment undertaken by the Regional Fishery Management Organization. This work is part of an ongoing work on a global review of albacore tuna in the world.
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00208/31925/30343.pdf

Identification de la période la plus pertinente pour l’interdiction de 3 mois chaque année, de la pêche au chalut jusqu’à 6 milles marins de la côte en mer Méditerranée
Provedor de dados: 5
Autores: Bourjea, Jerome; Billet, Norbert; Certain, Gregoire; Jadaud, Angelique; Vaz, Sandrine.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00506/61726/65701.pdf

CAMP – Connectivité des Aires Marines Protégées - Période Mars 2009 – Février 2010. Rapport intermédiaire
Provedor de dados: 5
Autores: 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

Differentiation of albacore stock: review by oceanic regions
Provedor de dados: 5
Autores: 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

Estimation des CPUE des navires/métiers concernés par les autorisations de pêche (AEP) des plans de gestion Méditerranée (PGM)
Provedor de dados: 5
Autores: Demaneche, Sebastien; Biseau, Alain; Bourjea, Jerome.
Ce document donne les valeurs des CPUE estimées depuis 2012 jusqu'en 2018 à partir des données OBSDEB pour les espèces*engins concernés par les plans de gestion Méditerranée
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00614/72592/79167.pdf

Suivi électronique de la mégafaune marine en Méditerranée nord-occidentale
Provedor de dados: 5
Autores: Bourjea, Jerome; Fromentin, Jean-marc.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59818/62961.pdf

Estimation des CPUE des navires/métiers concernés par les autorisations de pêche (AEP) plans de gestion Méditerranée (PGM)
Provedor de dados: 5
Autores: Demaneche, Sebastien; Biseau, Alain; Bourjea, Jerome.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00506/61724/79169.pdf

Habitat use of a multispecific seagrass meadow by green turtles Chelonia mydas at Mayotte Island
Provedor de dados: 5
Autores: Ballorain, Katia; Ciccione, Stephane; Bourjea, Jerome; Grizel, Henri; Enstipp, Manfred; Georges, Jean-yves.
We investigated the habitat use in green turtles exploiting a 13-ha multispecific seagrass meadow at Mayotte Island, south-western Indian Ocean. A phytoecological survey shows the occurrence of eight seagrass species, dominated by Halodule uninervis and Syringodium isoetifolium, distributed according to four distinct seagrass communities along the depth gradient. Direct underwater censuses show that green turtles occurred all over the meadow. Yet when community relative surface area was taken into account green turtles preferentially frequented the most seaward, biomass-richer S. isoetifolium-dominated community, suggesting that green turtles compensate for their intrinsically nutrient-poor herbivorous diet. Additionally, smaller (\80 cm standard curved...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00018/12918/10201.pdf

CAMP Connectivité des Aires Marines Protégées. Mars 2009-Octobre 2012. Rapport Final
Provedor de dados: 5
Autores: 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

Plan national d’actions en faveur des tortues marines sur les territoires français du sud-ouest de l’océan Indien 2015-2020. La Réunion. Volume 3
Provedor de dados: 5
Autores: Philippe, Jean-sébastien; Bourjea, Jerome; Ciccione, Stéphane.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00347/45777/45422.pdf

Identification d’une fermeture spatio-temporelle en Méditerranée occidentale française (GSA7) ayant pour objectif une diminution de 20% des captures de juvéniles de merlu (Merluccius merluccius)
Provedor de dados: 5
Autores: Bourjea, Jerome; Billet, Norbert; Certain, Gregoire; Jadaud, Angelique; Biseau, Alain.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00585/69667/67532.pdf

The Role of Geomagnetic Cues in Green Turtle Open Sea Navigation
Provedor de dados: 5
Autores: Benhamou, Simon; Sudre, Joël; Bourjea, Jerome; Ciccione, Stephane; De Santis, Angelo; Luschi, Paolo.
Background: Laboratory and field experiments have provided evidence that sea turtles use geomagnetic cues to navigate in the open sea. For instance, green turtles (Chelonia mydas) displaced 100 km away from their nesting site were impaired in returning home when carrying a strong magnet glued on the head. However, the actual role of geomagnetic cues remains unclear, since magnetically treated green turtles can perform large scale (.2000 km) post-nesting migrations no differently from controls. Methodology/Principal Findings: In the present homing experiment, 24 green turtles were displaced 200 km away from their nesting site on an oceanic island, and tracked, for the first time in this type of experiment, with Global Positioning System (GPS), which is able...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00048/15958/13390.pdf

Effects of extraction method and storage of dry tissue on marine lipids and fatty acids
Provedor de dados: 5
Autores: Sardenne, Fany; Bodin, Nathalie; Metral, Luisa; Crottier, Anais; Le Grand, Fabienne; Bideau, Antoine; Brisset, Blandine; Bourjea, Jerome; Saraux, Claire; Bonhommeau, Sylvain; Kerzerho, Vincent; Bernard, Serge; Rouyer, Tristan.
Various protocols are currently used to study marine lipids, but there is a growing interest in working on dry samples that are easier to transport. However, reference protocols are still lacking for dry samples. In order to make recommendations on this use, lipid classes and fatty acids (FA) obtained from six analytical protocols using two different tissue states (dry vs wet) and three extraction methods (automat vs manual potter vs leaving the solvent to work on tissue) were compared. Three dry storage modes of tissue (freezer vs gas nitrogen vs dry room) during one and three months were also compared. These comparisons were made on seven marine species with different lipid profiles, including fishes, crustaceans and mollusks. Lipid classes and FA...
Tipo: Text
Palavras-chave: Degradation; Freeze-drying; Lyophilization; Lipid class; Marine animal; Protocol.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00467/57898/60189.pdf

Evaluation des plans de gestion méditerranéens et recommandations pour une éventuelle révision du cadre scientifique de ces plans
Provedor de dados: 5
Autores: Bourjea, Jerome; Demaneche, Sebastien; Biseau, Alain.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00396/50711/79179.pdf

Otolith shape as a valuable tool to evaluate the stock structure of swordfish (Xiphias gladius) in the Indian Ocean
Provedor de dados: 5
Autores: Mahe, Kelig; Evano, Hugues; Mille, Tiphaine; Bourjea, Jerome.
Swordfish (Xiphias gladius) is an oceanic-pelagic species currently fully exploited by several fisheries in the Indian Ocean, with suspicion of overexploitation in the southwest, but without a clear understanding of the real stock structure within this Ocean. Population structure of the Indian stock was studied in the western Indian Ocean using 395 individual samples collected from 2009 to 2014. Sagittal otoliths of the fish have been removed and shape analysis performed on these calcified pieces. Otolith morphometrics data and normalized Elliptical Fourier Descriptors (EFDs) were then extracted automatically by the dedicated imageanalysis system TNPC. Preliminary, side effect was tested by Redundancy analysis (RDA) combined to permutation tests on 91...
Tipo: Text
Palavras-chave: Xiphias gladius; Otolith shape; Fourier descriptors; Stock discrimination; Indian Ocean.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00269/37980/36068.pdf

Review and Cartography of scientific literature on Thunnus alalunga
Provedor de dados: 5
Autores: Nikolic, Natacha; Bourjea, Jerome.
Albacore tuna (Thunnus alalunga) is an economically valuable species worldwide. However information on this species is sparse in some scientific fields according to oceans. This disparity has been revealed from bibliometric analysis. Here, we presented the clustering map and the classification of scientific fields by ocean.
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00251/36260/34809.pdf

France - Territoire. Rapport national destiné au Comité scientifique de la Commission des thons de l’océan Indien, 2011-2012 Commission des thons de l’océan Indien, 2015
Provedor de dados: 5
Autores: Marsac, Francis; Chassot, Emmanuel; Cauquil, Pascal; Chavance, Pierre; Clot, Thierry; Bach, Pascal; Bourjea, Jerome; Bodin, Natalie.
Depuis le passage de Mayotte comme territoire sous régime communautaire, l’outre-mer français tropical de l’océan Indien ne concerne plus que les îles Eparses qui sont rattachées à l’administration supérieure des Terres Australes et Antarctiques françaises (TAAF). Un parc naturel marin a été créé le 22 février 2012 (décret n°2012-245), il s’agit du PNM des Glorieuses, qui dépend des îles Eparses et s’étend sur l’ensemble de la ZEE des Glorieuses. Les Iles Eparses sont inhabitées et ne disposent pas de flottilles thonières immatriculées à France-Territoires. Néanmoins, les TAAF délivrent des licences de pêche à des palangriers et senneurs français et étrangers souhaitant pêcher dans les eaux françaises, et un programme observateur accompagne l’octroi de ces...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00308/41896/41162.pdf

Plan national d’actions en faveur des tortues marines sur les territoires français du sud-ouest de l’océan Indien 2015-2020. Mayotte, Réunion, Îles Éparses. Diagnostic, stratégie opérationnelle et actions régionales. Volume 1. Partie commune
Provedor de dados: 5
Autores: Philippe, Jean-sébastien; Bourjea, Jerome; Ciccione, Stéphane; Ballorain, Katia; Marinesque, Sophie; Glenard, Zoé.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00345/45599/45421.pdf

OTOLITHE –ESPADON : Evaluation de la structure du stock d’espadon de l’océan indien à partir des analyses de forme des otolithes
Provedor de dados: 5
Autores: Bourjea, Jerome; Mille, Tiphaine; Evano, Hugues; Mahe, Kelig.
L’espadon (Xiphias gladius) de l’océan Indien est actuellement une ressource évaluée comme étant pleinement exploitée à l’échelle de cet océan, avec un risque de surexploitation dans le sud-ouest de l’océan Indien. Une précédente étude a permis de démontrer que les espadons de l’océan Indien ne formaient qu’une seule et même population génétique (conclusion du projet IOSSS – ESPADON). L’objectif de ce projet a été d’explorer la forme de 395 otolithes d’espadons collectés dans sept zones différentes de l’océan Indien pour identifier s’ils provenaient de stocks différents ou non.  Cette étude a permis de tirer 5 conclusions principales : les otolithes gauche et droit de l’espadon sont significativement similaires. 1- il n’y a pas d’effet de la taille des...
Tipo: Text
Palavras-chave: Espadon; Xiphias gladius; Otolithe; Descripteur de Fourier; Stock; Océan Indien; Forme.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00272/38324/36565.pdf

Rapport OBsDEB. Estimation 2016 des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane. Rapport annuel Convention DPMA-Ifremer 2016
Provedor de dados: 5
Autores: Weiss, Jerome; Lespagnol, Patrick; Demaneche, Sebastien; Leonardi, Sophie; Bourjea, Jerome; Evano, Hugues; Reynal, Lionel; Guyader, Olivier; Baulier, Loic; Mansuy, Emmanuel; Berthou, Patrick; Daures, Fabienne; Leblond, Emilie; Merrien, Claude; Rostiaux, Emilie; Le Blond, Samuel.
Le programme d’observation des marées au débarquement, appelé « ObsDEB », contribue à l’estimation de l’effort de pêche et des captures des flottes de pêche françaises. Il vise tout particulièrement les flottilles de petite pêche côtière et procède à la collecte des informations requises selon un plan d’échantillonnage adapté à chaque région suivie. Ce rapport est le Rapport annuel de Convention DPMA-Ifremer 2016 et présente les estimations 2016 des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00414/52556/53393.pdf

Global Conservation Priorities for Marine Turtles
Provedor de dados: 5
Autores: Wallace, Bryan P.; Dimatteo, Andrew D.; Bolten, Alan B.; Chaloupka, Milani Y.; Hutchinson, Brian J.; Abreu-grobois, F. Alberto; Mortimer, Jeanne A.; Seminoff, Jeffrey A.; 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; Finkbeiner, Elena M.; Girard, Alexandre; Girondot, Marc; Hamann, Mark; Hurley, Brendan J.; Lopez-mendilaharsu, Milagros; Angela Marcovaldi, Maria; Musick, John A.; Nel, Ronel; Pilcher, Nicolas J.; Troeng, Sebastian; Witherington, Blair; Mast, Roderic B.
Where conservation resources are limited and conservation targets are diverse, robust yet flexible priority-setting frameworks are vital. Priority-setting is especially important for geographically widespread species with distinct populations subject to multiple threats that operate on different spatial and temporal scales. Marine turtles are widely distributed and exhibit intra-specific variations in population sizes and trends, as well as reproduction and morphology. However, current global extinction risk assessment frameworks do not assess conservation status of spatially and biologically distinct marine turtle Regional Management Units (RMUs), and thus do not capture variations in population trends, impacts of threats, or necessary conservation...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00050/16097/13573.pdf

Contrasted habitats and individual plasticity drive the fine scale movements of juvenile green turtles in coastal ecosystems
Provedor de dados: 5
Autores: 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

Structure et connectivité de la mégafaune marine à l’échelle d’une région océanique. Enjeux pour la gestion durable des tortues vertes dans l’océan Indien occidental
Provedor de dados: 5
Autores: Bourjea, Jerome.
This thesis is a comprehensive work aiming to improve scientific knowledge on the green turtle (Chelonia mydas) in order to provide key scientific evidences needed for the implementation of coherent and effective management measures to protect at the Western Indian Ocean scale this threatened species. In a first step, this work aimed to established baseline data on the abundance of green turtles nesting females and long term trends of some key nesting populations of the region by applying different modelling methods. In a second step, this work determined the regional genetic structure of this species and the relationships that exists between the different populations. Finally, the conservation of marine turtles being closely dependant to external...
Tipo: Text
Palavras-chave: Tortues marines; Tortue verte; Chelonia mydas; Mégafaune; Évaluation de population; Tendance sur long terme; Structure génétique; Génétique des populations; Capture accidentelle; Biologie de la conservation; Unité de gestion; Océan Indien; Marines turtles; Green turtle; Chelonia mydas; Megafauna; Population assessment; Long term trend; Genetic structure; Population genetic; By-catch; Incidental catch; Biological conservation; Management units; Indian ocean.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00244/35505/34009.pdf

Otolith shape as a valuable tool to evaluate the stock structure of swordfish (Xiphias gladius) in the Indian Ocean
Provedor de dados: 5
Autores: Mahe, Kelig; Evano, Hugues; Mille, Tiphaine; Bourjea, Jerome.
Swordfish (Xiphias gladius) is an oceanic-pelagic species currently fully exploited by several fisheries in the Indian Ocean, with suspicion of overexploitation in the southwest, but without a clear understanding of the real stock structure within this Ocean. Population structure of the Indian stock was studied in the western Indian Ocean using 395 individual samples collected from 2009 to 2014. Sagittal otoliths of the fish have been removed and shape analysis performed on these calcified pieces. Otolith morphometrics data and normalized Elliptical Fourier Descriptors (EFDs) were then extracted automatically by the dedicated image-analysis system TNPC. Preliminary, side effect was tested by Redundancy analysis (RDA) combined to permutation tests on 91...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00220/33150/31633.pdf

DYMATURE 2015 - Dynamique spatio-temporelle et origine des tortues vertes immatures des îles Eparses. Rapport de Mission Glorieuse &amp; Juan de Nova, 20 mars – 12 avril 2015
Provedor de dados: 5
Autores: 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...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00260/37095/35605.pdf

Nesting Phenology of Marine Turtles: Insights from a Regional Comparative Analysis on Green Turtle (Chelonia mydas)
Provedor de dados: 5
Autores: Dalleau, Mayeul; Ciccione, Stephane; Mortimer, Jeanne A.; Garnier, Julie; Benhamou, Simon; Bourjea, Jerome.
Changes in phenology, the timing of seasonal activities, are among the most frequently observed responses to environmental disturbances and in marine species are known to occur in response to climate changes that directly affects ocean temperature, biogeochemical composition and sea level. We examined nesting seasonality data from long-term studies at 8 green turtle (Chelonia mydas) rookeries that include 21 specific nesting sites in the South-West Indian Ocean (SWIO). We demonstrated that temperature drives patterns of nesting seasonality at the regional scale. We found a significant correlation between mean annual Sea Surface Temperature (SST) and dates of peak nesting with rookeries exposed to higher SST having a delayed nesting peak. This supports the...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00098/20940/18558.pdf

UE - France. Rapport national destiné au Comité scientifique de la Commission des thons de l’océan Indien, 2011-2012 Commission des thons de l’océan Indien, 2015
Provedor de dados: 5
Autores: Bach, Pascal; Chassot, Emmanuel; Bourjea, Jerome; Evano, Hugues; Huet, Jerome; Chavance, Pierre; Floch, I; Cauquil, Pascal; Sabarros, Phillipe; Giannasi, P; Marsac, Francis.
Pour ce qui concerne la France en incluant dorénavant le département de Mayotte, rattaché à la flotte de l’UE depuis le 1er janvier 2014, cinq flottilles ont des activités de pêche thonière dans l'océan Indien : - les senneurs opérant pour l’essentiel à partir des Seychelles et de l’Ile Maurice, - les palangriers basés à La Réunion, les palangriers basés à Mayotte, et à un moindre degré les pêches artisanales réunionnaise   - La flottille thonière française à la senne exerçant dans l’océan Indien atteint 13 navires en 2014 et ses capture se sont élevées à 58 421 tonnes, soit un niveau largement supérieur à celui de 2013 (39958 t) en lien avec une augmentation de l’effort de pêche de 2 291 jours de pêche en 2013 à 3756 jours en 2014. Le programme...
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00308/41893/41160.pdf

Chemical contaminants (trace metals, persistent organic pollutants) in albacore tuna from western Indian and south-eastern Atlantic Oceans: Trophic influence and potential as tracers of populations
Provedor de dados: 5
Autores: 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

Expédition pluridisciplinaire "Iles Eparses" 2010 - Rapport de mission Juan de Nova - Europa, 14 mai - 7 juin 2010
Provedor de dados: 5
Autores: Bourjea, Jerome; Mouquet, Pascal; Quod, Jean-pascal; Ciccione, Stephane.
This report shows the sum up of a pluridisciplinary field trip done in May 2010 in Europa and Juan de Nova, 2 French islands that are part of the French Eparses Islands in the south west Indian Ocean. The objectives of this field trip were to: - Sample 3 coral fish species (L. kasmira, E. merra et M. berndti) in the framework of a project aiming to understand the marine life connectivity between Marine Protected Areas of the South West Indian Ocean. This field trip allowed sampling more than 150 specimens of these 3 species as well as others fish samples for ongoing genetic studies within the region. - Realise the ground truth after acquisition of bathymetric Lidar and Hyperspectral data within the project of reef habitats mapping of the South West Indian...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00018/12915/9872.pdf

DYMITILE – DYnamique MIgratoire des Tortues marines nidifiant dans les ILEs françaises de l'Océan Indien
Provedor de dados: 5
Autores: Bourjea, Jerome; Ciccione, Stephane; Dalleau, Mayeul.
Chez les tortues marines, la migration est un processus indispensable tout au long de leur cycle biologique. Décrire et caractériser le cycle spatial des tortues marines est donc nécessaire pour définir une stratégie de conservation efficace à long terme. Nous avons étudié, grâce à la télémétrie satellitaire, la dynamique spatiale de deux espèces à différents stades de leur vie : 105 tortues vertes adultes Chelonia mydas en migration post reproductive dans le Sud-ouest de l’océan Indien (SOOI), et 18 tortues caouannes juvéniles Caretta caretta en phase océanique capturées accidentellement par la pêcherie palangrière réunionnaise.Le suivi des tortues vertes femelles a permis d’obtenir 77 trajets complets de migration post reproductive (Europa (17), Mayotte...
Tipo: Text
Palavras-chave: Tortue verte; Chelonia mydas; Tortue caouanne; Caretta caretta; Migration; Couloir migratoire; Télémétrie satellitaire; Site d’alimentation; Saisonnalité; Îles Eparses; Mayotte; Comores; Oman; Océan Indien.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00169/28050/26257.pdf

A methodological framework to predict the individual and population‐level distributions from tracking data
Provedor de dados: 5
Autores: 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

IOSSS - ESPADON - Etude de la structure du stock d'espadon de l'Océan Indien: Synthèse de la première année. Période novembre 2008 - décembre 2009
Provedor de dados: 5
Autores: Bourjea, Jerome; Le Couls, Sarah; Muths, Delphine; Evano, Hugues.
Based on genetic and biological dynamic approaches, the main objective of the IOSSSESPADON project (2009-2011) is to study the biology and the stock structure of the Swordfish (Xiphias gladius) in the Indian Ocean and the bordering oceans (South East Atlantic and West Pacific). The results of this project will greatly contribute to a better stock assessment of this species that is undertaken by fisheries management commissions, mainly the IOTC. The first year of the project was dedicated to finalize the sampling strategy, to elaborate the associated protocols and to implement a large balanced sampling shame organised around a stratified spatio – temporal effort (2 sampling seasons: April – June and October – December) in the whole Indian Ocean. Based on a...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00018/12914/9871.pdf

France-Territoires : Rapport national destiné au Comité scientifique de la Commission des thons de l’océan Indien, pour sa réunion annuelle 2012
Provedor de dados: 5
Autores: Laurent-monpetit, Christophe; Chavance, Pierre; Bourjea, Jerome; Chassot, Emmanuel.
Les outre-mer français de l’Océan indien incluent Mayotte, Département depuis le 31 mars 2011 et les îles Eparses qui sont rattachées à l’administration supérieure des Terres australes et antarctiques françaises (TAAF). Depuis janvier 2010, Mayotte dispose d’un parc naturel marin (PNM) doté d’un conseil de gestion dont les limites maritimes sont celles de la ZEE de Mayotte. Un second parc naturel marin a été créé le 22 février 2012 (décret n°2012-245 du 22 février 2012), il s’agit du PNM des Glorieuses, qui dépend des îles Eparses, qui s’étend sur l’ensemble de la ZEE des Glorieuses. Les captures totales dans l’océan Indien des senneurs français immatriculés à Mayotte se sont élevées en 2011 à 26 610 tonnes, soit une augmentation sensible de 45% par...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00109/21984/19600.pdf

Multi-Genetic Marker Approach and Spatio-Temporal Analysis Suggest There Is a Single Panmictic Population of Swordfish Xiphias gladius in the Indian Ocean
Provedor de dados: 5
Autores: Muths, Delphine; Le Couls, Sarah; Evano, Hugues; Grewe, Peter; Bourjea, Jerome.
Genetic population structure of swordfish Xiphias gladius was examined based on 2231 individual samples, collected mainly between 2009 and 2010, among three major sampling areas within the Indian Ocean (IO; twelve distinct sites), Atlantic (two sites) and Pacific (one site) Oceans using analysis of nineteen microsatellite loci (n = 2146) and mitochondrial ND2 sequences (n = 2001) data. Sample collection was stratified in time and space in order to investigate the stability of the genetic structure observed with a special focus on the South West Indian Ocean. Significant AMOVA variance was observed for both markers indicating genetic population subdivision was present between oceans. Overall value of F-statistics for ND2 sequences confirmed that Atlantic...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00139/25013/23117.pdf

Atlas électronique web de la pêche palangrière réunionnaise
Provedor de dados: 5
Autores: 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

The spatial ecology of juvenile loggerhead turtles (Caretta caretta) in the Indian Ocean sheds light on the "lost years" mystery
Provedor de dados: 5
Autores: Dalleau, Mayeul; Benhamou, Simon; Sudre, Joel; Ciccione, Stephane; Bourjea, Jerome.
While our understanding of the early oceanic developmental stage of sea turtles has improved markedly over recent decades, the spatial context for this life history stage remains unknown for Indian Ocean loggerhead turtle populations. To address this gap in our knowledge, 18 juvenile loggerheads were satellite tracked from Reunion Island (21.2A degrees S, 55.3A degrees E) between 2007 and 2011. Nine turtles swam north toward Oman (20.5A degrees N, 58.8A degrees E), where one of the world's largest rookeries of loggerheads is located. Three individuals traveled south toward South Africa and Madagascar, countries that also host loggerhead nesting grounds. Fourteen of the transmitters relayed diving profiles. A dichotomy between diurnal and nocturnal diving...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00210/32173/32178.pdf

Mission Europa. 22 mai au 6 juin 2006.
Provedor de dados: 5
Autores: Bourjea, Jerome; Gravier-bonnet, Nicky; Boullet, Vincent; Ciccione, Stephane; Rolland, Robin.
Les objectifs de la mission était les suivants:  - PROGRAMME TORTUES MARINES : (i) Collecte d’échantillons génétiques sur les juvéniles de tortue verte (Chelonia mydas) et imbriquée (d’Eretmochelys imbricata) dans la mangrove d’Europa (Programme Ifremer/Kelonia) ; (ii) Inventaire des habitats dans le lagon d’Europa et de Bassas da India - PROGRAMME VEGETAUX : (i) Inventaire de la flore vasculaire ; (ii) étude de la végétation d’Europa (Programme CBNM) - PROGRAMME HYDRAIRES : (i) Inventaire des hydraires présents à Europa ; (ii) Prospection sur Bassas Da India - Réalisation d’un documentaire de 26 minutes présentant les programmes de cette mission.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00244/35519/34024.pdf

Rapport OBSDEB. Estimation 2015 des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane
Provedor de dados: 5
Autores: Weiss, Jerome; Lespagnol, Patrick; Demaneche, Sebastien; Leonardi, Sophie; Bourjea, Jerome; Evano, Hugues; Reynal, Lionel; Guyader, Olivier; Baulier, Loic; Blanchard, Fabian; Berthou, Patrick; Daures, Fabienne; Leblond, Emilie; Merrien, Claude; Leblond, Samuel.
Le programme d’observation des marées au débarquement, appelé « ObsDEB », contribue à l’estimation de l’effort de pêche et des captures des flottes de pêche françaises. Il vise tout particulièrement les flottilles de petite pêche côtière et procède à la collecte des informations requises selon un plan d’échantillonnage adapté à chaque région suivie. Ce rapport est le Rapport annuel de Convention DPMA-Ifremer 2015 et présente les estimations 2015 des efforts de pêche et des productions dans les régions Méditerranée continentale, La Réunion, Martinique, Guadeloupe et Guyane.
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00360/47133/47082.pdf

Reproductive seasonality and trend of Chelonia mydas in the SW Indian Ocean: a 20 yr study based on track counts
Provedor de dados: 5
Autores: Lauret-stepler, Marie; Bourjea, Jerome; Roos, David; Pelletier, Dominique; Ryan, P.g.; Ciccione, Stephane; Grizel, Henri.
The green turtle Chelonia mydas is classified as endangered because of global declines over the past few centuries due to human exploitation and habitat destruction, particularly the loss of nesting areas. We used the number of tracks as an indicator of breeding female abundance at their nesting sites to study the seasonality and trends of turtles breeding at 3 islands in the SW Indian Ocean: Europa, Tromelin and Grande Glorieuse, over 20 yr. On Tromelin, tracks were counted along the entire nesting beach, but on Europa and Grande Glorieuse counts were limited to a proportion of the island. Europa and Tromelin exhibited similar seasonal patterns, with a well-defined peak during the wet season (November–February), compared to a dry season peak for Grande...
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00018/12917/9874.pdf

Projet GERMON. Structure génétique et migration du thon Germon
Provedor de dados: 5
Autores: Nikolic, Natacha; Puech, Alexis; Chouvelon, Tiphaine; Munschy, Catherine; Bodin, Nathalie; Brach-papa, Christophe; Potier, Michel; West, Wendy; Knoery, Joel; Zudaire, Iker; Dhurmeea, Zahirah; Degroote, Maxime; Cedras, Maria; Evano, Hugues; Bourjea, Jerome.
The GERMON project had several aims i) to understand the populations’ structure between albacore tuna southwest of the Indian Ocean and southeast Atlantic, ii) to determine the origin of juveniles observed in South Africa iii) to improve the understanding of the biology field (Size/Size and Size/Weight; reproduction and feeding area; trophic linkages) and iv) to initiate work on chemical analyzes and adaptation of the albacore species to its environment. These aims have been held and the results allow a better understanding of the management albacore. A general summary of results is presented in Part 9.
Tipo: Text
Palavras-chave: Germon; Thunnus alalunga; Génétique; Stock; Structure; Connectivité; Chimie; Reproduction; Alimentation; Habitat; Albacore; Thunnus alalunga; Genetic; Stock; Structure; Connectivity; Chemical; Reproduction; Feeding behavior; Habitat.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00293/40461/39152.pdf

Analysis of the genetic structure and life history of albacore tuna in terms of diversity, abundance and migratory range at the spatial and time scales: Project GERMON (GEnetic stRucture and Migration Of albacore tuNa)
Provedor de dados: 5
Autores: 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
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00160/27109/25289.pdf

Stock structure of the swordfish (Xiphias gladius) in the southwest Indian Ocean: A preliminary study
Provedor de dados: 5
Autores: Jean, Claire; Bourjea, Jerome; Jouen, Emmanuel; Taquet, Marc.
Stock structure of swordfish (Xiphias gladius Linnaeus, 1758) from four areas of the South West Indian Ocean was conducted using Restriction Fragment Length Polymorphism (RFLP) on mtDNA control region and six amplified microsatellite loci. No significant differences were found among the four locations using either molecular technique. Most variability was found within populations, with only a small proportion of variation among samples, suggesting a unique stock of swordfish in the South West Indian Ocean. The sample size of this study is too small to reveal significant structure among the sampling locations. These results are baseline for a future larger scale project in the whole Indian Ocean.
Tipo: Text
Palavras-chave: Indian Ocean; Microsatellite loci; MtDNA; Xiphias gladius; Swordfish.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2313.pdf

Genetic connectivity of the reef fish Lutjanus kasmira at the scale of the western Indian Ocean
Provedor de dados: 5
Autores: Muths, Delphine; Gouws, G.; Mwale, M.; Tessier, Emmanuel; Bourjea, Jerome.
Examining the genetic structure of species allows an estimate of the level of evolutionary connectivity between localities; this information is important for marine biodiversity protection, in particular, for the delineation of marine protected areas. In this context, a total of 601 Lutjanus kasmira (Forsskal, 1775) were sampled in 16 localities of the western Indian Ocean and analyzed with both mitochondrial cytochrome b sequencing and eight microsatellite loci genotyping. Both genetic markers indicate that differentiation was not significant even between samples separated by more than 4000 km. This absence of genetic differentiation among samples was favored by ecological plasticity of the species and is now ensured by resultant high levels of dispersal....
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00079/19044/16647.pdf

Rapport d'activité 2009 de la Délégation Ifremer Océan Indien
Provedor de dados: 5
Autores: Le Goff, Ronan; Bourjea, Jerome; Le Ru, Loic; Fleury, Pierre-gildas; Evano, Hugues; Ropert, Michel; Scolan, Pierre; Garric-perales, Julie; Perrine, Annie.
Ce rapport présente les principales réalisations et les principaux projets de la Délégation Ifremer océan Indien en 2009.
Tipo: Text
Palavras-chave: Rapport d’activité 2009; Délégation Ifremer océan Indien; Station Ifremer de La Réunion; Laboratoire d’halieutique de La Réunion; Projets scientifiques Ifremer.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00058/16959/14448.pdf

Mission MADA-NOVA. 30 mai-13 juin 2007. Mission scientifique pluridisciplinaire 2007: Nord Ouest Malgache &amp; Juan de Nova
Provedor de dados: 5
Autores: 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
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00244/35518/34023.pdf

Modeling larval dispersal for the gilthead seabream in the northwestern Mediterranean sea
Provedor de dados: 5
Autores: 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

Ultralight aircraft surveys reveal marine turtle population increases along the west coast of Reunion Island
Provedor de dados: 5
Autores: 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

Situation en 2011 des ressources exploitées par les flottilles françaises
Provedor de dados: 5
Autores: 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
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00035/14656/11956.pdf

Are we working towards global research priorities for management and conservation of sea turtles?
Provedor de dados: 5
Autores: 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

Phylogeography of the green turtle, Chelonia mydas, in the Southwest Indian Ocean
Provedor de dados: 5
Autores: 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

Plan national d’actions en faveur des tortues marines sur les territoires français du sud-ouest de l’océan Indien 2015-2020. Iles Eparses. Volume 4
Provedor de dados: 5
Autores: Marinesque, Sophie; Glenard, Zoé; Bourjea, Jerome.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00347/45778/45423.pdf

Otolith shape as a valuable tool to evaluate the stock structure of swordfish   Xiphias gladius   in the Indian Ocean
Provedor de dados: 5
Autores: 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

Regional Management Units for Marine Turtles: A Novel Framework for Prioritizing Conservation and Research across Multiple Scales
Provedor de dados: 5
Autores: 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
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00028/13926/11308.pdf

Mayotte Island: another important green turtle nesting site in the southwest Indian Ocean
Provedor de dados: 5
Autores: 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
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00018/12916/9873.pdf

EXPEDITION EUROPA 2011. Rapport de Mission Europa, 16 Novembre – 2 décembre 2011 - IFREMER/ KELONIA / CNRS
Provedor de dados: 5
Autores: 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
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00244/35515/34019.pdf

Comité Scientifique de la Commission des Thons de l’Océan 2011, Compte-rendu de participation
Provedor de dados: 5
Autores: Bourjea, Jerome; Le Couls, Sarah.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00060/17157/14653.pdf

Etat des stocks de langoustine (Nephrops norvegicus), crevette rose (Parapenaeus longirostris), cardine à quatre tâches (Lepidorhombus boscii), et pocheteau noir (Dipturus oxyrinchus) de l’Est de la Corse
Provedor de dados: 5
Autores: Jadaud, Angelique; Bourjea, Jerome; Demaneche, Sebastien; Biseau, Alain.
Tipo: Text
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00388/49972/79666.pdf

Reunion island pelagic longline fishery characterization and standardization of albacore catch rates
Provedor de dados: 5
Autores: 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
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00208/31926/30344.pdf

Guide de prélèvement et d’envoi des otolithes de légines (Dissostichus eleginoides)
Provedor de dados: 5
Autores: 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
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00180/29135/27543.pdf

Restricted dispersal of the reef fish Myripristis berndti at the scale of the SW Indian Ocean
Provedor de dados: 5
Autores: Muths, Delphine; Tessier, Emmanuel; Gouws, G.; Craig, M.; Mwale, M.; Mwaluma, J.; Mwandya, A.; Bourjea, Jerome.
The reef fish Myripristis berndti (Jordan &amp; 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