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| Registros recuperados: 135 | |
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| Bellamy, Elise; Caill-milly, Nathalie; Lissardy, Muriel; Mahe, Kelig. |
| Ce poster présente les pièces calcifiées utilisées pour estimer l'âge des principales espèces de poissons du sud du golfe de Gascogne. La sclérochronologie, du grec “scleros” = pièces dures, “chronos” = temps, “logos” = étude, est la discipline s’intéressant à la croissance des organismes. Chez les poissons osseux, les estimations d’âge sont réalisées à partir de leurs pièces calcifiées et chaque année, ce sont quelques 35 000 pièces qui sont traitées par l’institut Ifremer. Pour la majorité des espèces, l’otolithe, composant de l’oreille interne, est la pièce calcifiée utilisée. |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00256/36688/35296.pdf |
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| Carbonara, Pierluigi; Zupa, Walter; Anastasopoulou, Aikaterini; Bellodi, Andrea; Bitetto, Isabella; Charilaou, Charis; Chatzispyrou, Archontia; Elleboode, Romain; Esteban, Antonio; Follesa, Maria Cristina; Isajlovic, Igor; Jadaud, Angelique; Garcia-ruiz, Cristina; Giannakaki, Amalia; Guijarro, Beatriz; Kiparissis, Sotiris Elias; Ligas, Alessandro; Mahe, Kelig; Massaro, Andrea; Medvesek, Damir; Mytilineou, Chryssi; Ordines, Francesc; Pesci, Paola; Porcu, Cristina; Peristeraki, Panagiota; Thasitis, Ioannis; Torres, Pedro; Spedicato, Maria Teresa; Tursi, Angelo; Sion, Letizia. |
| The uncertainty in age estimation by otolith reading may be at the root of the large variability in red mullet (Mullus barbatus) growth models in the Mediterranean. In the MEDITS survey, red mullet age data are produced following the same sampling protocol and otolith reading methodology. However, ageing is assigned using different interpretation schemes, including variations in theoretical birthdate and number of false rings considered, in addition to differences in the experience level of readers. The present work analysed the influence of these variations and the geographical location of sampling on red mullet ageing using a multivariate approach (principal component analysis). Reader experience was the most important parameter correlated with the... |
| Tipo: Text |
Palavras-chave: Mullus barbatus; Age variability; MEDITS; Mediterranean; Reader effect; False rings; Date of birth. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00591/70320/68356.pdf |
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| Elleboode, Romain; Simon, Olivier; Mahe, Kelig. |
| Le pôle national de Sclérochronologie de l'Ifremer de Boulogne-sur-Mer a été contacté dans le cadre du projet de recherche OPERA (utilisation des Otolithes de Poisson comme marqueur de l’Exposition cumulée de l’uRAnium, qui est intégré à un défi interdisciplinaire NEEDS : Nucléaire : Energie, Environnement, Déchets, Société) pour réaliser une étude sur l’estimation de l’âge du gardon (Rutilus rutilus) à partir des otolithes et des écailles de poissons vivant dans un lac contaminé à l’Uranium. L’IRSN a ainsi envoyé des otolithes et écailles de gardon avec lesquels différents tests et des essais d’interprétation ont été réalisés dans un premier temps pour une étude de faisabilité de l’estimation de l’âge et dans un deuxième temps pour estimer l’âge des... |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00212/32359/30814.pdf |
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| Mahe, Kelig; Amara, R; Bryckaert, T; Kacher, M; Brylinski, J. |
| Analysis of the diet of trawl-caught hake (Merluccius merluccius) from three locations in the Bay of Biscay and the Celtic Sea in autumn 2001 showed that small hake fed almost exclusively on crustaceans (mainly euphausiids), but that there was a significant shift towards a fully piscivorous diet in hake > 23 cm. A change in fish prey was also size-dependent, because smaller hake (< 30 cm) preyed on small pelagic fish (3-12 cm), such as horse mackerel, anchovy, and pilchard, and larger hake on larger demersal prey (12-23 cm), such as blue whiting. There was a significant positive relationship between hake and fish prey length. In terms of fish prey selectivity, hake exhibited particular preference for small pelagic prey (anchovy, pilchard, and... |
| Tipo: Text |
Palavras-chave: Spatial variations; Prey selectivity; Northeast Atlantic; European hake; Diet; Cannibalism. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3849.pdf |
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| Rabhi, Khalef; Bellamy, Elise; Elleboode, Romain; Roos, David; Aumond, Yoann; Huet, Jerome; Mahe, Kelig. |
| Ces dernières années, la petite pêche réunionnaise qui ciblait traditionnellement les espèces récifales et démersales peu profondes, a évolué progressivement vers l’exploitation des stocks de poissons plus profonds (au-delà de 200 m). Ces nouvelles espèces économiquement importantes font l’objet d’une forte exploitation mais sont cependant fragiles d’un point de vue biologique (croissance lente, maturité sexuelle tardive, recrutement aléatoire, écosystème sensible, habitats restreint à La Réunion). Ainsi, il y a une nécessité de mettre en place des mesures de gestion rationnelles et durables de ces ressources. Pour répondre à cela, le projet de recherche DMX (Indicateurs biologiques et écologiques pour une gestion durable des stocks de poissons DéMersauX... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00256/36687/35293.pdf |
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| Akkus, Gizem; Jemaa, Sharif; Cemal Gucu, Ali; Marchal, Paul; Carbonara, Pierluigi; Bacha, Mahmoud; Amara, Rachid; Ernande, Bruno; Saraux, Claire; Mahe, Kelig. |
| European anchovy, Engraulis encrasicolus, is a small pelagic coastal marine fish largely spread from the North Sea to central Africa, including the entire Mediterranean and the Black and Azov Seas. The aim of the study is to understand the potential different population structure and their relationship between the Northeast Atlantic, Western, Eastern Mediterranean and the Black Sea anchovy population. The outlines of 2127 sagittal otoliths were collected from nineteen locations (English Channel, Atlantic, the Mediterranean and Black Sea), and added to existing information available from a previous study. Elliptical Fourier Analysis (EFA) was used to analyze the otolith shape variations among locations. Before examining the geographical differentiation by... |
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| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00436/54722/56157.pdf |
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| Khoufi, Widien; Dufour, Jean-louis; Jaziri, Hela; Elfehri, Safouene; Elleboode, Romain; Bellamy, Elise; Ben Meriem, Sadok; Romdhane, Mohamed Salah; Mahe, Kelig. |
| Growth parameters of any species are fundamental for biological or dynamic studies. The quality of the estimation for these parameters directly impacts on species stock assessment and, as a consequence, on fisheries management. In order to improve fishery and species stock management, growth analysis, especially by sex, is recommended. In this study, otoliths were used to estimate growth parameters of Merluccius merluccius Rafinesque, 1810. Hake is well-known as being a species in which otolith interpretation is extremely difficult. To estimate growth parameters, the first daily increment was validated as the tool for age determination. Otolith interpretation was done according to the last results of ICES cooperative research report. In total, a sample of... |
| Tipo: Text |
Palavras-chave: Merlucciidae; Merluccius merluccius; Tunisia; Western Mediterranean; Age estimation; Growth model; Otolith. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00191/30238/28662.pdf |
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| Mahe, Kelig; Bellamy, Elise; Lartaud, Franck; De Rafelis, Marc. |
| This work focuses on investigating the potential of calcein and manganese as growth markers of the common cockle (Cerastoderma edule) in the bay of Somme (France). Recapture of shells, previously marked using a chemical marking and then bred in natural conditions, was performed in order to determine the shell growth patterns. Calcein marking has shown a fluorescent increment in shells after only 30 min immersion time at 150 mg L-1, but also for shells immersed 3 h at 50 mg L-1. Likewise, manganese shell marking was revealed under cathodoluminescence for shells immersed 1 h at 120 mg L-1 as well as for shells which spent 4 h at 90 mg L-1. A numerical analysis performed on each marked cockles has revealed 23 micro-increments between the mark and the ventral... |
| Tipo: Text |
Palavras-chave: Calcein; Manganese; Marking; Cathodoluminescence; Shellfish; Cerastoderma edule. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00025/13649/10758.pdf |
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| Simon, Victor; Elleboode, Romain; Mahe, Kelig; Legendre, Laurent; Ornelas-garcia, Patricia; Espinasa, Luis; Retaux, Sylvie. |
| Background Life in the darkness of caves is accompanied, throughout phyla, by striking phenotypic changes including the loss or severe reduction in eyes and pigmentation. On the other hand, cave animals have undergone constructive changes, thought to be adaptive, to survive in this extreme environment. The present study addresses the question of the evolution of growth in caves, taking advantage of the comparison between the river-dwelling and the cave-dwelling morphs of the Mexican tetra, Astyanax mexicanus. Results A sclerochronology approach was undertaken to document the growth of the species in these two very distinct habitats. Scales from 158 wild Astyanax mexicanus specimens were analyzed from three caves (Pachón, Tinaja and Subterráneo) and two... |
| Tipo: Text |
Palavras-chave: Cave; Fish; Size; Age; Scales; Growth; Food; Comparative biology; Life history traits. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00412/52337/53124.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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| Rabhi, Khalef; Bellamy, Elise; Elleboode, Romain; Aumond, Yoann; Huet, Jerome; Roos, David; Mahe, Kelig. |
| Cette étude correspond au volet « croissance » du projet ANCRE-DMX2. Six espèces ciblées parmi les principales espèces démersales débarquées par la petite pêche réunionnaise ont été étudiées afin d’établir leur modèle de croissance, dont certaines pour la première fois. Ce travail présente les résultats de la croissance, acquis à partir de pièces calcifiées (otolithe, écaille, opercule). Des tests préalables des différentes techniques (observation in toto, otolithe brûlé, otolithe cassé-brûlé, coupe fine) sur les principales pièces calcifiées (otolithes, écailles et opercules) ont été menés, afin d’appliquer la méthode de traitement la mieux adaptée à chaque espèce. Les paramètres morphométriques de l’otolithe ont été mesurés (Poids : Ow, Longueur : OLong,... |
| Tipo: Text |
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| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00347/45866/45554.pdf |
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| Bellamy, Elise; Lefebvre, Alain; Mahe, Kelig. |
| Strong mortalities have occured May, 2008 in the bay of Somme, in two distinct areas named “CH4” and “Voie de Rue”. This document lays out methods and results of the sampling realised in both areas. CH4 as Voie de Rue show strong death rates, respectively 99,74 % (mostly animals size bounded between 20 and 36 mm)and 93,18 % (mostly animals size bounded between 22 and 30 mm), in comparison with the 8,5 % due to natural mortality in reference area. Zoosanitary analysis of the cockle point out that infectious hypothesis would not be the reason of these mortalities. |
| Tipo: Text |
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| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/00011/12274/9065.pdf |
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| Osman, Yassein A. A.; Mehanna, Sahar F; El-mahdy, Samia M; Mohammad, Ashraf S; Mahe, Kelig. |
| The age and growth of the haffara seabream, Rhabdosargus haffara (Forsskål, 1775) from Hurghada fishing area, Red sea, Egypt, were investigated using a sample of 466 specimens. The fish length varied between 12.7 and 27.2 cm and the weight from 38.1 to 293.2 g. Samples were collected from the artisanal fisheries during the fishing season from August 2018 to July 2019. The relationship between the body lengths (total, fork and standard length in cm) and the body weight (g) was found to be significant (p < 0.05). The relationship between the body length and weight regarding the sex effect was insignificant for all samples (log W- log TL, ANCOVA, p > 0.05). The relationship between length and weight was estimated by a power regression function, with a... |
| Tipo: Text |
Palavras-chave: Age precision; Growth; Rhabdosargus haffara; Hurghada; Red Sea; Egypt stock assessment. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00623/73484/72774.pdf |
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| Reveillac, Elodie; Bagliniere, Jean-luc; Marchand, Fréderic; Mahe, Kelig. |
| L'analyse des structures dures/calcifiées des organismes aquatiques (poissons, mollusques, cephalopodes...) constitue souvent la base d'études en écologie /biologie des populations et plus particulièrement dans l'étude du fonctionnement des populations. Leur analyse apporte des données telles que l'âge et la croissance, indispensables au développement de modèles en dynamique de populations (stock-recrutement, individus centrés, CMR) et permettent de prendre en compte la variabilité biologique. Ces structures dures sont aussi utilisées pour des caractérisations génétique et environnementale de l'individu. De fait, l'utilisation de ces structures contribue au développement et à la mise en œuvre de méthodes permettant une caractérisation plus précise de... |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00174/28518/26884.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; Oudard, Clemence; Mille, Tiphaine; Keating, James P; Gonçalves, Patricia; Clausen, Lotte Worsøe; Petursdottir, G; Rasmussen, H; Meland, E; Mullins, E; Pinnegar, Jk; Hoines, A; Trenkel, Verena. |
| Information on stock identification and spatial stock structure provide a basis for understanding fish population dynamics and improving fisheries management. In this study otolith shape analysis was used to study the stock structure of blue whiting (Micromesistius poutassou) in the northeast Atlantic using 1693 samples from mature fish collected between 37°N and 75°N and 20°W and 25°E. The results indicated two stocks located north and south of ICES Divisions VIa and VIb (54°5 to 60°5 N, 4° to 11°W). The central area corresponds to the spawning area west of Scotland. Sampling year effects and misclassification in the linear discriminant analysis suggested exchanges between the northern and southern stocks. The results corroborate previous studies... |
| Tipo: Text |
Palavras-chave: Micromesistius poutassou; Forme de l’otolithe; Descripteurs de Fourier; Discrimination de stock; Nord-est de l’Océan atlantique.; Micromesistius poutassou; Otolith shape; Fourier descriptors; Stock discrimination; Northeast atlantic. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00334/44508/44202.pdf |
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| Registros recuperados: 135 | |
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