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| Registros recuperados: 135 | |
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| Mahe, Kelig; Bellamy, Elise; Delpech, Jean-paul; Lazard, Coline; Salaun, Michele; Verin, Yves; Coppin, Franck; Travers-trolet, Morgane. |
| Weight–Body Length relationships (WLR) of 45 fish species (37 Actinopterygii and eight Elasmobranchii) were investigated. A total of 31,167 individuals were caught and their biological parameters measured during the four quarters from 2013 to 2015, on five scientific surveys sampling the North-eastern Atlantic Ocean from the North Sea to the Bay of Biscay (ICES Divisions IVb, IVc, VIId, VIIe, VIIg, VIIh, VIIj, VIIIa and VIIIb). Among 45 tested species, all showed a significant correlation between total length (L) and total weight (W). The influence of sex on WLR was estimated for 39 species and presented a significant sexual dimorphism for 18 species. Condition factor (K) of females was always higher than for males. Moreover, a spatial effect on the WLR... |
| Tipo: Text |
Palavras-chave: Weight-length relationship; Condition factor; Bay of Biscay; Celtic Sea; English Channel; North Sea; Sexual dimorphism; Seasonality. |
| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00363/47418/47513.pdf |
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| Guillaud, Emilie; Elleboode, Romain; Mahe, Kelig; Bearez, Philippe. |
| The fish remains sampled from archaeological sites are generally the result of human food refuse; therefore, the study of retrieved fish scales may provide reliable information on the season of capture and on paleoclimate and paleoenvironmental changes. Among Western European freshwater fishes, the grayling, Thymallus thymallus¸ has the most easily recognizable scales and is a commonly recovered species from Paleolithic contexts. This study, therefore, is based on the growth pattern analysis of modern and archaeological scales from grayling specimens. The modern specimens were collected monthly in France (n = 22), Switzerland (n = 16), Finland (n = 20) and Sweden (n = 10). Scale growth patterns were measured using numerical analysis to a high accuracy. The... |
| Tipo: Text |
Palavras-chave: France; Le Taillis des Coteaux; Marginal increment analysis; Scales; Scalimetry; Sclerochronology; Thymallus thymallus; Upper Paleolithic. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00379/48992/49436.pdf |
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| Carbini, Sebastien; Chessel, Anatole; Benzinou, Abdesslam; Fablet, Ronan; Mahe, Kelig; De Pontual, Helene. |
| Most of European fish stocks are assessed using age-based models, and otolith interpretation for age estimations costs several million euros annually. In this context, automated ageing systems would provide a mean to 1) standardize ageing, 2) control ageing consistency within and between ageing laboratories 3) build interpreted image data bases ensuring the information conservation and sharing and 4) improve growth studies while reducing the cost of the acquisition of age data. This paper presents a review of different image-based tools for automatic fish ageing from otolith features within the framework of AFISA (EU STREP project on Automated FISh Ageing coordinated by Ifremer). The full automatic ageing process can be divided into three main steps: 1)... |
| Tipo: Text |
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| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/00024/13519/10546.pdf |
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| Elleboode, Romain; Oudard, Clemence; Mahe, Kelig. |
| TNPC (Traitement Numérique de Pièces Calcifiées) est un logiciel dédié à l’acquisition et au traitement des pièces calcifiées, développé l'institut français IFREMER. Plusieurs années ont été nécessaires à l’élaboration de ce logiciel. Le développement du projet a commencé en 1994 avec le travail d’Hervé Troadec, en collaboration avec d’autres personnes tels que Ronan Fablet, Hélène de Pontual et André Ogor. TNPC (version 7) fonctionne sur la plate-forme Visilog (version 7) développée par la société FEI (anciennement Noésis). La plupart des applications utilisées sont des fonctions propres de Visilog et vous trouverez toutes les informations appropriées dans la documentation installée avec TNPC. TNPC a connu de nombreuses évolutions ces dernière années,... |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00276/38692/37193.pdf |
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| Rabhi, Khalef; Bellamy, Elise; Elleboode, Romain; Aumond, Yoann; Huet, Jerome; Roos, David; Mahe, Kelig. |
| Cette étude correspond au volet « croissance » du projet ANCRE-DMX2. Six espèces ciblées parmi les principales espèces démersales débarquées par la petite pêche réunionnaise ont été étudiées afin d’établir leur modèle de croissance, dont certaines pour la première fois. Ce travail présente les résultats de la croissance, acquis à partir de pièces calcifiées (otolithe, écaille, opercule). Des tests préalables des différentes techniques (observation in toto, otolithe brûlé, otolithe cassé-brûlé, coupe fine) sur les principales pièces calcifiées (otolithes, écailles et opercules) ont été menés, afin d’appliquer la méthode de traitement la mieux adaptée à chaque espèce. Les paramètres morphométriques de l’otolithe ont été mesurés (Poids : Ow, Longueur : OLong,... |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00347/45866/45554.pdf |
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| Chater, Ines; Romdhani, Ahlem; Ktari, Mohamed Hédi; Mahe, Kelig. |
| Analysis of diet composition and feeding intensity of the brown meager (Sciaena umbra, Linnaeus, 1758) was realised seasonally and according to the fish size in the Central Mediterranean sea (Gulf of Tunis). Specimens were collected, monthly from October 2008 to September 2011 from the landings of the small-scale fisheries. In all, 272 stomachs of brown meagre measuring between 15.3 and 49.2cm total length (TL) were examined. The prey items identified in stomachs belong to six groups: Crustacea (Decapoda, Amphipoda, Isopoda, Mysidacea, Stomatopoda…), Annelida, Mollusca, Teleostei, Angiosperma and Algae. 118 stomachs were empty (43.4%). This percentage varied throughout the year. The lowest feeding intensity was recorded in summer during spawning period... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00117/22791/20593.pdf |
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| Rochet, Marie-joelle; Prigent, M; Bertrand, Jacques; Carpentier, Andre; Coppin, Franck; Delpech, Jean-paul; Fontenelle, G; Foucher, Eric; Mahe, Kelig; Rostiaux, Emilie; Trenkel, Verena. |
| The results of a survey on fishers' perceptions of recent changes in the eastern English Channel ecosystem carried out in 2006 were compared with fishery and bottom-trawl survey data. A hypothesis-testing framework was used, testing the null hypothesis that fishers' statements were true, which permitted evaluation of both agreement and disagreement. Overall good agreement between fishers' statements and scientific data was found, and both sources suggested that the fish community in the Channel is undergoing large changes, among which are decreases in some commercially important species; in addition, a number of human pressures impact the ecosystem. Fishers had an accurate perception of changes and their time-frames, but not necessarily of their causes.... |
| Tipo: Text |
Palavras-chave: Stakeholder interview; Hypothesis testing; Fisher knowledge; Ecosystem approach to fisheries management; Eastern English Channel. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4474.pdf |
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| Mahe, Kelig; Elleboode, Romain; Charilaou, Charis; Ligas, Alessandro; Carbonara, Pierluigi; Intini, Simona. |
| There were an exchange and a workshop in 2009 of Red mullet Mullus barbatus and Striped red mullet Mullus surmuletus (WKACM). The Otolith Exchange Scheme 2011 was the second exercise for the Red mullet Mullus barbatus and Striped red mullet Mullus surmuletus. 5 readers participated in this exchange. The images collection (n=540) came from the Bay of Biscay, the Balearic Islands, the Southern Spain and the Southern Adriatic sea. 175 Mullus surmuletus and 202 Mullus barbatus have been examined to all Institutes. Among 540 images, there were 377 otoliths and 163 scales. 2 images sets have been realised for Mullus surmuletus in Balearic Islands and for Mullus barbatus in the Southern Spain to compare the age estimation between both calcified pieces. Results... |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00063/17435/14941.pdf |
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| 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 |
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| Mahe, Kelig; Penil, Caroline; Sevin, Karine. |
| Ce rapport synthétise l'analyse des otolithes d'anguilles prélevés en 2011 dans le cadre du suivi des captures de cette espèce inscrite à la DCF (Data Collection Framework règlement CE n°199/2008 du conseil du 25 février 2008). 140 anguilles ont été prélevées entre fin juillet et fin octobre 2011 dans la Loire, la Dordogne et la Gironde. La relation entre la longueur totale (Lt) et le poids total (Wt) des anguilles prélevées en 2011 dans toute la France (Loire, Garonne et Dordogne) est du type Wt = 5.10-7.Lt3,21. Ainsi, les anguilles présentent une allométrie majorante (b=3.21) c’est-à-dire que le poids croit plus vite que la longueur. L'institut IFREMER à travers le pôle national de Sclérochronologie à Boulogne-sur-mer a préparé et interprété les... |
| Tipo: Text |
Palavras-chave: Anguille; Otolithe; Age; Dordogne; Garonne; Loire. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00310/42080/41383.pdf |
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| Person, Jeannine; Mahe, Kelig; Le Bayon, Nicolas; Le Delliou, Herve. |
| Growth and metabolism of juvenile European sea bass of a Western Mediterranean population were assessed at six constant temperatures (13, 16, 19, 22, 25 or 29 degreesC) in an 84-day trial. Duplicated groups of 84 fish (initial weight 80 I g) were held under O-2-concentrations close to saturation (87 mg l(-1)) and were fed to satiation. Mass gain increased as temperature increased from 13 to 25 degreesC. At 25 and 29 degreesC, growth was similar up to day 72, but a 6% decrease was observed by day 84 at 29 degreesC. Days 0-84 specific growth rates (SGR) were 0.45%,1.29% and 1.21% day(-1) at 13, 25 and 29 degreesC, respectively. The estimated temperature (7) for maximum SGR was 26 degreesC (SGR = 1.715 - 0.322T + 0.022T(2) - 4.233e(-4)T(3)). Feed intake (FI)... |
| Tipo: Text |
Palavras-chave: Oxygen consumption; Fish culture; Thermal requirement; Metabolic rate; Feeding. |
| Ano: 2004 |
URL: http://archimer.ifremer.fr/doc/2004/publication-626.pdf |
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| Ramdane, Zouhir; Trilles, Jean-paul; Mahe, Kelig; Amara, Rachid. |
| A total of 664 Boops Boops (Linnaeus, 1758) and 823 Mullus barbatus barbatus Linnaeus, 1758 from the east coast of Algeria were examined to study their parasitofauna. We collected eleven parasitic species (two monogeneans, three copepods, five isopods and one Branchiura) from B. boops, and four parasitic species (two copepods and two isopods) from M. barbatus barbatus. Five species were reported for the first time in Algeria. The site of attachment on the host and the degree of specificity varied according to the parasite species while the infestation rate changed according to the month and the host size. The parasitism did not show a significant negative impact on the biological parameters of the fish host. |
| Tipo: Text |
Palavras-chave: Boops boops; Mullus barbatus barbatus; Algeria; Ectoparasites; Impact of parasitism. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00148/25901/23918.pdf |
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| Cresson, Pierre; Fabri, Marie-claire; Miralles, Francoise Marco; Dufour, Jean-louis; Elleboode, Romain; Sevin, Karine; Mahe, Kelig; Bouchoucha, Marc. |
| Despite being generally located far from contamination sources, deep marine ecosystems are impacted by chemicals like PCB. The PCB contamination in five fish and shark species collected in the continental slope of the Gulf of Lions (NW Mediterranean Sea) was measured, with a special focus on intra- and interspecific variability and on the driving factors. Significant differences occurred between species. Higher values were measured in Scyliorhinus canicula, Galeus melastomus and Helicolenus dactylopterus and lower values in Phycis blennoides and Lepidorhombus boscii. These differences might be explained by specific abilities to accumulate and eliminate contaminant, mostly through cytochrome P450 pathway. Interindividual variation was also high and no... |
| Tipo: Text |
Palavras-chave: Bioaccumulation; Continental slope; Gulf of Lions; PCB. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00313/42421/41790.pdf |
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| Cochard, Marie-laure; Elleboode, Romain; Mahe, Kelig. |
| La baie de Granville dans le golfe normano-breton, située en Manche Est, représente la principale région française et européenne de pêche du buccin (Buccinum undatum) et génère une activité économique importante (environ 8000 tonnes et 12 millions € par an). Cette pêcherie est exploitée par 50 à 60 caseyeurs (arts dormants). Elle est très encadrée réglementairement (licences, quotas journaliers, taille minimale de capture). Bien que la production estimée soit relativement stable ces dernières années, la pêcherie reste vulnérable car localisée dans la partie méridionale de l’aire de répartition de l’espèce et pourrait être impactée défavorablement par un réchauffement climatique (Cf. derniers scenarii du GIEC). En ce sens, le buccin pourrait constituer une... |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00387/49801/50369.pdf |
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| Delpech, Jean-paul; Mehault, Sonia; Rostiaux, Emilie; Leaute, Jean-pierre; Leblond, Emilie; Demaneche, Sebastien; Coppin, Franck; Mahe, Kelig; Vaz, Sandrine. |
| This report is a result of a contract between Ifremer and the French Ministry of Industry. The aim was to provide map the fisheries activity and landings for french fishing vessels, located in the Eastern Channel and the Bay of Biscay during the year 2005. Two areas have been selected: - the "Eastern Channel" area, including 7 administrative departments : Nord, Pas-de-Calais, Somme, Seine-Maritime, Eure, Calvados and Manche. - the "Loire-Gironde" area, including 4 administrative departments : Loire-Atlantique, Vendée, Charente-Maritime and Gironde. |
| Tipo: Text |
Palavras-chave: Fishing fleets; Fishing gears; Bay of Biscay; Eastern Channel; Mapping; Landings; Fisheries activity; Flottilles; Pêche; Engins; Golfe de Gascogne; Manche est; Cartographie; Production; Activité halieutique. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/rapport-6645.pdf |
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| Chater, Ines; Romdhani, Ahlem; Dufour, Jean-louis; Mahe, Kelig; Francour, Patrice; Chakroun-marzouk, Nadia. |
| Background. Bastard grunt, Pomadasys incisus (Bowdich, 1825), is reported as a well-established species in the Mediterranean Sea. Although bastard grunt has rapidly expanded its area of distribution in the Mediterranean, there is no information about its age and growth. The aim of this study was to provide data about growth, condition, and first sexual maturity of the species in order to contribute to a better management of its fishery. Materials and methods. A total of 515 specimens of bastard grunt were caught in the Gulf of Tunis. The age was determined from otoliths. Length–weight relation, von Bertalanffy equation, and growth rate were employed to evaluate the fish growth. Also the condition factor and length at first sexual maturity were calculated.... |
| Tipo: Text |
Palavras-chave: Sagittal otoliths; Biological traits; Von Bertalanffy growth function; Length-weight relation; Pomadasys incisus. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00259/37006/35502.pdf |
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| Mahe, Kelig; Cochard, Marie-laure; Quero, Jean-claude; Sevin, Karine; Bailly, Nicolas; Tetard, Alain. |
| Premier signalement de Epinephelus marginatus (Serranidae: Epinephelinae) en Manche orientale. Le premier signalement du mérou noir Epinephelus marginatus (Lowe, 1834) en Manche orientale est rapporté. Un spécimen a été capturé le 10 juin 2011 en baie de Seine. Il mesurait 66 cm et pesait 5,5 kg. D'après l'étude des écailles, il s'agissait d'une femelle adulte âgée de 12 ans qui n'avait pas effectué sa croissance dans la Manche, ce qui confirme le fait d'une observation occasionnelle et non le signe d'une extension d'aire de répartition avec une population établie. |
| Tipo: Text |
Palavras-chave: Serranidae; Epinephelus marginatus; Atlantic Ocean; Eastern English Channel; First record. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00113/22395/20097.pdf |
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| Registros recuperados: 135 | |
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