Consulta: creatorFacets:"Mahe, Kelig"
Registros recuperados: 135
Data/hora: 11/06/2024 03:58:35

Use of otolith-shape analysis for stock discrimination of Boops boops along the Algerian coast (southwestern Mediterranean Sea)
Provedor de dados: 5
Autores: Ider, D.; Ramdane, Z.; Mahe, Kelig; Dufour, Jean-louis; Bacha, M.; Amara, R.
Otolith-shape analysis was examined to determine its utility for biological stock identification of the bogue Boops boops along the Algerian coast of the Mediterranean Sea. The outlines of 179 sagittal otolith pairs from fish collected at three locations (Oran, Bejaia and Annaba) between 2013 and 2016 were digitised and analysed for shape variation by elliptical Fourier analysis. Potential confounding sources of variation (fish length, age and sex, and left or right otolith position) were examined and accounted for in the analyses before interpretation of spatial differences in distribution of the stock. Redundancy analysis showed a significant difference between the left and right otoliths. No difference was correlated with sex and age, but fish length...
Tipo: Text
Palavras-chave: Biological stocks; Elliptical Fourier analysis; Image analysis; Linear discriminant analysis; Marine fish; Principal components analysis; Sex differences.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00409/52075/52855.pdf

Growth of the common Cockle Cerastoderma edule : Validation of the periodicity of increment deposition by Calcein marker
Provedor de dados: 5
Autores: Bellamy, Elise; Mahe, Kelig; De Rafelis, Marc; Lartaud, Franck.
Cockle (Cerastoderma edule) growth has not been studied a lot yet and the current approach of counting external ridges in order to make age estimation is limited. Nevertheless, growth is a key parameter for monitoring bivalves populations, which are heavily exploited in French estuaries. The Bay of Somme which is located in the eastern Channel in the north of France, is the first French field of cockles (Cerastoderma edule). In order to improve stock management, it is necessary to increase our knowledge of this species. This study is looking at the growth of the common cockle.  In this way, recapture of shells previously marked under calcein marker and then breed in natural conditions in the Bay of Somme, was performed in order to determine the shell...
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12268/9053.pdf

Sources de variation de la forme des otolithes: Implications pour la discrimination des stocks de poissons
Provedor de dados: 5
Autores: Mahe, Kelig.
The assessment and management of fish populations is based on the use of management units called fish stocks. The shape of otoliths, calcified structures of the fish's inner ear, can be used to discriminate these stocks. First, this thesis focuses on the study of the spatio-temporal variability of the otolith’s shape for three fish species with different ecological characteristics (size, swimming speed, behaviour in the water column, etc.) and biogeographical environments. The results showed that there is a decreasing structural gradient across stock sizes from large pelagic species to more localised demersal species. This is linked to the fact that some demersal species such as the bogue (Boops boops) are constrained by the presence of geographical...
Tipo: Text
Palavras-chave: Otolithe; Forme; Stock halieutique; Descripteurs de Fourier; Température; Acides gras; Asymétrie directionnelle; Degrés-jours de croissance; Otolith; Shape; Fish stock; Fourier descriptors; Temperature; Fatty acids; Directional asymmetry; Growing degree days.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00598/70972/69201.pdf

Growth of the Japanese carpet shell : Validation of increment deposition periodicity by chemical marking
Provedor de dados: 5
Autores: Caill-milly, Nathalie; Bellamy, Elise; D'Amico, Franck; Mahe, Kelig.
Arcachon Bay is the first French field of Manila clam (Ruditapes philippinarum) with an annual production comprised between 500 and 1000 tons in the recent years. In order to improve stock management,an in situ experimentation of chemical marking, using calcein, has been undertaken to validate the periodicity of increment deposition and the optimal conditions of chemical marking in Arcachon Bay. Later on, daily growth rates will be analysed regarding to  environmental parameters to increase our knowledge on this species.Manila clam were collected and divided into groups of 80 animals (including control group) which size distribution spread over a large range. Identified groups were marked by immersion in a calcein solution (CAS 1461-15-0), using different...
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00039/15066/12401.pdf

Atelier d'inter-calibration des estimations des petits pélagiques (Anchois et Sardine) en Atlantique. Boulogne sur mer, 14 au 15 mars 2018
Provedor de dados: 5
Autores: Mahe, Kelig; Duhamel, Erwan; Chantre, Celina; Bled Defruit, Geoffrey.
Cet atelier 2018 a été mis en place pour intercalibrer les estimations d'âge des anchois et des sardines en Atlantique entre Erwan Duhamel qui est le lecteur de ces espèces du golfe de Gascogne et Célina Chantre et Geoffrey Bled Defruit du pôle national de Sclérochronologie du laboratoire Ressources Halieutiques de Boulogne sur mer qui vont commencer à estimer l'âge de ces petits pélagiques dans le golfe de Gascogne. L'objectif est d'abord de calibrer les estimations d’âge pour ces 2 espèces de petits pélagiques dans le golfe de Gascogne et de revoir les moyens pour réaliser les images en mer lors de la campagne Pelgas et à terre en laboratoire. Cette intercalibration est basée sur la lecture d’images : 136 otolithes d'anchois et 140 otolithes de sardine...
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00434/54544/55913.pdf

Report of the Roundnose grenadier (Coryphaenoides rupestris) Otolith Exchange Scheme 2011
Provedor de dados: 5
Autores: Mahe, Kelig; Elleboode, Romain; Øverbø Hansen, Hege; Román Marcote, Esther; Marull Hernández, Eva; Teruel Gómez, Josefina; Etherton, Mark.
The roundnose grenadier (Coryphaenoides rupestris) Otolith Exchange 2011 was a second one after the exchange of 2007. It was composed by 2 sets of otoliths from VIa(western Scotland ; n=64, the same as the exchange 2007 used one) sampled from January to June 2006 and otoliths from IIIa (Skagerrak ; n=63) sampled from January 2011. 6 readers participated from Spain (3 readers), UK England (1 reader), Norway (1 reader) and France (1 reader). Only images of otoliths sections were used during this exchange. The set of otoliths from VIa showed Coefficient of Variation of 14.9% and percent agreement to modal age of 29.3%. The set of otoliths from IIIa showed Coefficient of Variation of 22.6% and percent agreement to modal age of 30.7%. These results from both...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00063/17436/14942.pdf

Growth and age estimation of the greater forkbeard, Phycis blennoides (Actinopterygii: Gadiformes: Phycidae), from the Gulf of Tunis (central Mediterranean)
Provedor de dados: 5
Autores: Romdhani, Ahlem; Ktari, Mohamed-hedi; Dufour, Jean-louis; Mahe, Kelig; Francour, Patrice.
Background. The greater forkbeard, Phycis blennoides (Brünnich, 1768), is a gadiform species, which has economical value and its population is dwelling in a 60–800 m depth range throughout the Atlantic and the Mediterranean. Along African north coast, there is a lack of information about the biology (age, growth, sex-ratio) of this species. This study provides the first data on population parameters of P. blennoides in Tunisia.  Materials and Methods. Specimens of Phycis blennoides were collected from the landings of the artisanal fisheries between September 2007 and June 2010. The length–weight relations were determined according to the allometric equation: W = aTLb. Growth parameters were estimated using the von Bertalanffy growth equation.  Results....
Tipo: Text
Palavras-chave: Otolith; Biological traits; Length-weight relation; Von Bertalanffy growth function.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00324/43532/43077.pdf

Campagne dédiée à l'évaluation des effets biologiques induits par la contamination chimique en baie de Seine. SELISEINE 2018
Provedor de dados: 5
Autores: Mauffret, Aourell; Wessel, Nathalie; Roubeix, Vincent; Akcha, Farida; Chouvelon, Tiphaine; Aminot, Yann; Munschy, Catherine; Couteau, Jérôme; Briaudeau, Tifanie; Izagirre, Urtzi; Mahe, Kelig; Godfrin, Yoann; Pollono, Charles; Moisan, Karine; Olivier, Nathalie; Bely, Nadege; Bruzac, Sandrine; Crochet, Sylvette; Thomas, Bastien; Sireau, Teddy; Burgeot, Thierry.
Le dispositif « SELI » est mis en place depuis 2016 pour acquérir des données sur les effets biologiques intégrateurs de la contamination chimique chez des organismes marins (poissons et bivalves) et ainsi renseigner le critère 2 du descripteur 8 de la DCSMM (Le niveau de concentration des contaminants ne provoque pas d’effets dus à la pollution). Le présent rapport concerne le volet SELIseine. Des poissons plats (194 soles, flets et limandes) ont été prélevés en septembre 2018 sur le N/O Antéa, et des moules ont été prélevées en février 2019 sur 6 stations dans le cadre du suivi ROCCH MV suivant le protocole de la convention OSPAR (2012). Les biomarqueurs suivis chez ces organismes couvrent plusieurs types d’effets toxiques (reprotoxicité, génotoxicité,...
Tipo: Text
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00688/80024/83012.pdf

Suivi 2014 des captures d'anguilles pour la DCF : analyse des otolithes
Provedor de dados: 5
Autores: Elleboode, Romain; Oudard, Clemence; Bellamy, Elise; Penil, Caroline; Mahe, Kelig.
Ce rapport synthétise l'analyse des otolithes d'anguilles prélevés en 2014 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). 212 anguilles ont été prélevées de septembre à décembre 2014 dans le lac de Grand Lieu (n=49), la Loire fluviale (n=51), la Dordogne (n=59) et la Garonne (n=53). La relation entre la longueur totale (Lt) et le poids total (W) des anguilles prélevées en 2014 dans toute la France est du type W = 4.10-4.Lt3,41. Ainsi, les anguilles présentent une allométrie majorante (b=3,41) 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...
Tipo: Text
Palavras-chave: Anguille; Otolithe; Age; Dordogne; Loire; Garonne; Lac de Grand Lieu.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00310/42082/41385.pdf

Utilisation du logiciel TNPC : Acquisition automatique d’images de pièces calcifiées à partir d’un scanner
Provedor de dados: 5
Autores: Oudard, Clemence; Elleboode, Romain; Mahe, Kelig.
L’acquisition des images peut se réaliser de façon « manuelle » (loupe binoculaire, microscope) ou de façon « automatique » à savoir à l’aide d’une platine motorisée ou d’un scanner selon le type de pièces calcifiées traitées. L’utilisation d’acquisition d’images par scanner montre un avantage de temps et de standardisation sur la méthode d’acquisition « manuelle » pour la prise d’images et la numérisation de pièces calcifiées entières fortement contrastées (analyse de forme sur otolithes entiers par exemple). Lors de l’utilisation d’un scanner, les paramètres de réglages d’acquisition et de traitement doivent être testés avant d’être appliqués de façon identique à l’ensemble des pièces calcifiées étudiées. De plus, ce mode d’acquisition assure un gain de...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00063/17419/14926.pdf

In situ fast marking study of manila clams (Ruditapes philippinarum)
Provedor de dados: 5
Autores: Mahe, Kelig; Bellamy, Elise; D'Amico, Franck; Caill-milly, Nathalie.
Arcachon Bay, in the southern Bay of Biscay, is the first French production area of Manila clam (Ruditapes philippinarum) with an annual commercial fisheries production around 400 tons in recent years. This bivalve mollusc was introduced into the bay in the 1980s for aquaculture purpose and quickly succeeded in natural settlement so that its high market value led to the progressive establishment of a perennial fishery from the mid-1990s. Local management plans applied to this species are based on a licensing system for the commercial, protected fishery areas and days of prohibited fishing for both commercial and recreational fishermen. A minimum catch size is also prescribed by European regulation, and so growth rates are an important matter in this...
Tipo: Text
Palavras-chave: Calcein; In-situ marking; Ruditapes philippinarum; Bivalve mollusks; Fisheries.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00665/77693/79770.pdf

Otolithes (faces concave et convexe) des poissons de Manche orientale
Provedor de dados: 5
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00020/13101/10113.pdf

Estimation de l'âge du hareng et du sprat au sud mer du Nord
Provedor de dados: 5
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00020/13107/10105.pdf

Report of the Horse Mackerel, Mediterranean Horse Mackerel and Blue Jack Mackerel (Trachurus trachurus, T. mediterreaneus and T. picturatus) Otolith Exchange 2015
Provedor de dados: 5
Autores: Mahe, Kelig; Jurado, A; Garcia Guerreiro, A; Massaro, A; Dueñas, C; Lopez, E; Mullins, E; Lanteri, L; Ferreira, Mj; Elleboode, Romain; Mannini, A; Antolinez, A; Delfs, G; Casciaro, L; O'Cuaig, M; Torres, P; Dijkman, A; Bellamy, Elise; Eriksen, K; Carbonara, P.
The ICES Planning Group on Commercial Catch, Discards and Biological Sampling (PGCCDBS) identified the need of the Horse Mackerel, Mediterranean Horse Mackerel and Blue Jack Mackerel (Trachurus trachurus, T. mediterreaneus and T. picturatus) otolith exchange to take place in 2015. It was the forth exchange. The IFREMER institute and the COISPA Tecnologia &amp; Ricerca, Italy, coordinated this exchange. A total of 550 fish was sampled from the Atlantic Ocean (Eastern Channel, Celtic Sea, Bay of Biscay, Azores,  Portuguese waters and Tenerife) and the Mediterranean Sea (Alboran Sea,  South Adriatic Sea and Ligurian Sea). 19 readers from 8 countries (France, Germany, Spain, Ireland, Italy, Portugal, Netherlands and Norway) participated to this exchange. Among...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00274/38499/36971.pdf

Report of the Saithe (Polliachius virens, L.) Otolith Exchange 2013
Provedor de dados: 5
Autores: Mahe, Kelig; Sevin, Karine; Petursdottir, Groa; Finnbogadottir, Gudrun; Wilhelms, Ines; Beußel, Friederike; Bland, Barbara; Solbakken, Lisbet; Seim, Silje E.; Holm, Else; Mjanger, Hildegunn; Senneset, Harald; Ottesen, Merete V.; Skadal, Janicke.
The ICES Planning Group on Commercial Catch, Discards and Biological Sampling (PGCCDBS) identified the need of a Saithe (Polliachius virens) otolith exchange to take place in 2013. It was the second exchange after that’s of 2008. The IFREMER institute coordinated this exchange. A total of 295 fish was sampled from the Barent sea (ICES area : IIa, N=24), from the North Sea (ICES area : IV, N=34) and from the Western Scotland (ICES area : VIa, N=237). The length range of the fish was between 37 and 96 cm, with mean 60 cm. 13 readers from 5 countries (France, Germany, Iceland, Sweden &amp; Norway) were participated. Mean precision of age estimate for individual fish were Coefficient of Variation (CV) of 6.2% and percent agreement to modal age of 85.9. Among...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00185/29595/27962.pdf

Suivi 2011 des captures d'anguilles pour la DCF : analyse des otolithes
Provedor de dados: 5
Autores: 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

Age and growth of the striped seabream, Lithognathus mormyrus (Actinopterygii: Perciformes: Sparidae), in the central coast of Algeria, Mediterranean Sea
Provedor de dados: 5
Autores: Boufersaoui, Samira; Kassar, Abderrahmane; Mokrane, Zakia; Elleboode, Romain; Mahe, Kelig.
Background. Striped seabream, Lithognathus mormyrus (Linnaeus, 1758), is a bony fish, which has a high economic value on the Algerian coast. Because of the increasing fishing pressure, however, a close monitoring is recommended. The information about the biology of this species, occurring in the south-western Mediterranean Sea and especially in the north African coast, is very limited. The presently reported study provides new estimated data on age and growth parameters of striped seabream in Algeria. Materials and methods. A total of 449 specimens of L. mormyrus were sampled for 2 years (January 2013 to December 2014) from the commercial fishery in the central part of the Algerian coast. The samples were collected monthly. The fish ranged in size from...
Tipo: Text
Palavras-chave: Lithognathus mormyrus; Otolith; Age; Growth; Algerian coast; Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00473/58448/61028.pdf

Evaluation des ressources halieutiques par les campagnes scientifiques françaises - Façade "Manche est" et façade "Loire-Gironde"
Provedor de dados: 5
Autores: Delpech, Jean-paul; Mahe, Kelig; Mehault, Sonia; Rostiaux, Emilie; Biais, Gerard; Coppin, Franck; Vaz, Sandrine.
This report is a result of a contract between Ifremer and the French Ministry of Industry. The aim was to map the distribution of the fisheries resources from french scientific surveys. 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: Bay of Biscay; Eastern Channel; Juvenile; Adult; Abundance index; Specific richness; Mapping; Fisheries; Scientific survey; Golfe de Gascogne; Manche est; Juvénile; Adulte; Indice d'abondance; Richesse spécifique; Cartographie; Campagne halieutique.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-6642.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

Interprétation d’écailles de poissons d’eau douce : Brème, Chevaine, Carpe, Brochet, Barbeau, Sandre, Gardon, Perche
Provedor de dados: 5
Autores: Elleboode, Romain; Mahe, Kelig.
Le pôle de Sclérochronologie de l'IFREMER de Boulogne-sur-mer a réalisé une étude de scalimétrie d'espèces de poissons d'eau douce : Brème, Chevaine, Carpe, Brochet, Barbeau, Sandre, Gardon, Perche. Des essais d’interprétation des écailles ont été réalisés sur chacune des espèces et ce rapport présente les images numériques des estimations d'âge ainsi obtenues.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00180/29127/27533.pdf

Otolith age estimation by Mojette Transform descriptors and machine learning
Provedor de dados: 5
Autores: Poisson Caillault, Emilie; Vanhelst, Florentin; Charlet, Bastian; Mahe, Kelig.
Age and growth are primordial essential data in stock assessment and management. However, contracting experts for age estimation using calcified pieces costs several million euros annually. Yet, alternative methods exist for fish ageing using the otolith shape (i.e., otolith shape descriptors or Elliptic Fourier Analysis). The goal of this study is to use a new descriptor of the otolith shape with Mojette Transform as an input of k-Nearest Neighbors (k-NN), Random Forest (RF) and Multi-Layer Perceptron (MLP) classifiers. Mojette Transform is the exact discrete Radon transform used in tomographic reconstruction, image watermarking, or video compression. Its mathematical properties allow reducing the information and having enough redundancy to characterize...
Tipo: Text
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00436/54723/56158.pdf

TNPC software - Traitement Numérique des Pièces Calcifiées / Numerical Treatment of Calcified Structures : Développement d’un logiciel dédié à l’analyse des pièces calcifiées :
Provedor de dados: 5
Autores: Fave, Sébastien; Crepin, Emeline; Magalhaes, José Ramos; Ogor, Andre; De Pontual, Helene; Mahe, Kelig.
Chaque année, près d’1 million de pièces calcifiées (dont 35 000 en France) sont analysées pour l’évaluation de l’état des ressources marines. De plus, beaucoup de thématiques de recherche nécessitent elles-aussi l’utilisation de ces pièces calcifiées. Ainsi, depuis plus de 20 ans, un partenariat entre la société VSG (Visualization Sciences Group anciennement Noesis) et l’institut de recherche IFREMER (Institut Français de Recherche pour l'Exploitation de la Mer) a permis de développer le logiciel d'analyse d'images dédié aux pièces calcifiées, nommé TNPC (Traitement Numérique des Pièces Calcifiées, www.tnpc.fr). Divers projets de recherche et collaborations en particulier avec l’ENIB (Ecole Nationale des Ingénieurs de Brest) ont été nécessaires pour...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00148/25905/23922.pdf

Growth of an Inshore Antarctic ﬁsh, Trematomus newnesi (Nototheniidae), off Adelie Land
Provedor de dados: 5
Autores: Mahe, Kelig; Elleboode, Romain; Loots, Christophe; Koubbi, Philippe.
Dusky rockcod, Trematomus newnesi, is a widely distributed neritic circumpolar Antarctic fish species. We conducted a study on age and growth of Trematomus newnesi in coastal waters of Adélie Land in East Antarctica. A total of 289 specimens were collected in 2003, 2005, 2006 and 2009. They consisted of 122 females, 132 males and 35 immature specimens. Total length (TL) and total weight (W) of these fish ranged from 13.5 to 25 cm and 19.7 to 174 g respectively for females and from 12 to 20.9 cm and from 24.1 to 144.1 g for males. The TL/W relationship was described by the following parameters: a=7.2.10-3 and b=3.127, showing no significant difference between sex (ANCOVA, P&lt;0.05). Fish age was estimated by counting annual growth increments on polished...
Tipo: Text
Palavras-chave: Antarctic fish; Trematomus newnesi; Otoliths; Growth; Age; Adelie land.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00333/44440/44156.pdf

Rapport de faisabilité de l’estimation de l’âge du vivaneau rubis (Etelis carbunculus) de la Réunion
Provedor de dados: 5
Autores: Bellamy, Elise; Roos, David; Mahe, Kelig.
Après la réalisation du projet de recherche DMX1 (Indicateurs biologiques et écologiques pour une gestion durable des stocks de poissons DéMersauX profonds d’intérêt halieutique à La Réunion), un second projet de recherche DMX2 va débuter en 2014. L'un des intérêts de ce projet est d'obtenir des premiers résultats de croissance des espèces profondes de l'île de la Réunion.  Dans le cadre de la préparation de cette étude de croissance, des essais de faisabilité d’estimation de l’âge ont été réalisés sur des otolithes de vivaneau rubis (Etelis carbunculus) par le pôle national de sclérochronologie de l’Ifremer de Boulogne-sur-Mer. Les échantillons ont été prélevés par l’Ifremer de la Réunion en 2013 (David Roos).  Ce rapport de faisabilité a permis de...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00180/29160/27568.pdf

Striped red mullet (Mullus surmuletus, Linnaeus, 1758) in the eastern English Channel and southern North Sea: growth and reproductive biology
Provedor de dados: 5
Autores: Mahe, Kelig; Coppin, Franck; Vaz, Sandrine; Carpentier, Andre.
Biological information is necessary for population structure assessment of economically important species. There are no known published studies on the age and reproduction of Mullus surmuletus in the north of the Bay of Biscay. The aim of this study was to estimate growth and reproductive biology of this species in the eastern English Channel and southern North Sea from 1089 individuals, observed from February to December 2004. The length–weight relationship was described by the parameters: a = 3.284.10−6 and b = 3.243, being allometrically positive. Ages were determined from increments of otoliths, used entirely after a burning treatment. Marginal-increment analysis showed an annual periodicity of increment formation. Von Bertalanffy growth equations were...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00148/25903/23960.pdf

Croissance de la coque (Cerastoderma edule) en baie de Somme : Morphométrie et Marquage
Provedor de dados: 5
Autores: Bellamy, Elise; Lefebvre, Alain; Mahe, Kelig; De Rafelis, Marc.
The bay of Somme is the first French field of cockles (Cerastoderma edule) with a production amounting to 3000 tons per year on average. In order to improve the stock management, it is necessary to increase our knowledge of this species. This study is looking at the growth of the common cockle. First, was carried out a morphometric analysis of the two left and right valves, which has revealed a perfect symmetry of the shell and has allowed us to establish strong correlations among the morphometric parameters. Then, a chemical marking study has been realized with calcein and manganese in order to obtain the exact growth. Calcein marking has showed a fluorescent stria only for an half hour immersion time at 150 mg.L-1. Likewise, the manganese marking has...
Tipo: Text
Palavras-chave: Coque; Cerastoderma edule; Croissance; Baie de Somme; Marquage; Calcéine; Manganèse; Fluorescence; Cathodoluminescence; Cockle; Cerastoderma edule; Growth; Bay of Somme; Marker; Calcein; Manganese; Fluorescence; Cathodoluminescence.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00007/11815/8542.pdf

Variabilité spatiale de la signature multi-élémentaire des otolithes de G0 de Solea solea et Pleuronectes platessa au sein d’un habitat côtier : exemple de la baie de Seine
Provedor de dados: 5
Autores: Durieux, Eric; Mahe, Kelig; Labonne, Maylis; Morin, Jocelyne; Brind'Amour, Anik.
Les zones côtières telles que les baies et les estuaires constituent des nourriceries pour les juvéniles de nombreuses espèces de poissons marins et en particulier les poissons plats. In fine, la fonction de nourricerie d’un habitat repose sur sa capacité à produire des individus qui vont contribuer à la population adulte. La composition élémentaire des otolithes de poissons est devenue un outil important pour étudier la connectivité entre les habitats des juvéniles et des adultes. Cette approche majeure en écologie halieutique repose sur l’identification de signatures multi-élémentaires caractérisant les nourriceries. Il est donc important de considérer les processus spatiaux à plus petite échelle de manière à identifier localement les habitats de...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00220/33153/31641.pdf

Poissons du golfe du Lion : courbes de croissance (taille et poids) et maturité sexuelle
Provedor de dados: 5
Autores: Mahe, Kelig; Elleboode, Romain; Jadaud, Angelique.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00020/13098/10099.pdf

Report of the Sole (Solea solea) in the Bay of Biscay Otolith Exchange Scheme 2011
Provedor de dados: 5
Autores: Mahe, Kelig; Moerman, Martine; Maertens, Ilse; Holmes, Ian; Boiron-leroy, Anne; Elleboode, Romain.
There were an exchange and a workshop in 2002 of the sole in the Bay of Biscay. The Otolith Exchange Scheme 2011 was the second exercise for the sole in the Bay of Biscay. 5 readers participated in this exchange from Belgium (2 readers), from France (2 readers) and from UK England (1 reader). The otolith collection (n=120) came from 3 samples realized at the fishing port of La Cotinière during the month of June in 2010. For each otolith, readers had the images of otolith section before and after staining. This analyse presented the results of 8 readers (5 readings of stained otoliths and 3 readings of unstained otoliths). Mean precision of age estimate for individual fish were Coefficient of Variation (CV) of 4.7% and percent agreement to modal age of...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00063/17420/14943.pdf

Relationships between age, growth, diet and environmental parameters for anchovy (Engraulis encrasicolus L.) in the Bay of Benisaf (SW Mediterranean, west Algerian coast)
Provedor de dados: 5
Autores: Bacha, Mahmoud; Moali, Aissa; Benmansour, Nasr-eddine; Brylinski, Jean-michel; Mahe, Kelig; Amara, Rachid.
Age, growth and diet of anchovy were studied for the first time from samples collected in the Bay of Benisaf (west Algerian coast) during summer (spawning period) and autumn (recruitment period) 2007. Age structure and growth parameters were determined by otolith (sagitta) analyses. The von Bertalanffy growth function fitted to age-length data showed that most of anchovy growth is achieved during the first year of life, suggesting that this stock is primarily supported by the smallest age groups and has a strong dependence on recruitment. There were no significant differences between males and females, and pooled mean parameters were: L infinity = 15.61 cm, k = 0.75 per year and to, -1.32 years. Whatever the age-class anchovy is strictly zooplanktivorous....
Tipo: Text
Palavras-chave: Engraulidae; Engraulis encrasicolus; MED; West Algeria; Anchovy; Growth; Age; Diet; Ontogenetic.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00011/12212/9046.pdf

Suivi 2015 des captures d'anguilles pour la DCF : analyse des otolithes
Provedor de dados: 5
Autores: Elleboode, Romain; Sorriaux, Marion; Penil, Caroline; Mahe, Kelig.
Ce rapport synthétise l'analyse des otolithes d'anguilles prélevés en 2015 dans le cadre du suivi des captures de cette espèce inscrite à la DCF. 306 anguilles ont été prélevées de mai à octobre 2015 dans l’Adour fluvial (n=104), la Dordogne (n=51), la Garonne (n=50), au lac de Grand Lieu (n=50) et dans la Loire fluviale (n=51). Lors du prélèvement, quelques règles sont à respecter pour optimiser l'utilisation des données: · prélever la paire de sagittae (paires d’otolithes les plus grands et non cassés), · noter de façon précise la date de prélèvement (JJ/MM/AA), · noter de façon précise le lieu de capture et fournir les cartes avec les lieux référencés à l'IFREMER, · identifier le sexe du poisson, · mesurer le poids total, la longueur totale et si...
Tipo: Text
Palavras-chave: Anguille; Otolithe; Age; Adour fluvial; Dordogne; Garonne; Grand Lieu; Loire fluviale.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00371/48183/48298.pdf

Synthèse française des procédures d'estimation d'âge
Provedor de dados: 5
Autores: Mahe, Kelig; Bellail, Robert; Dufour, Jean-louis; Boiron-leroy, Anne; Dimeet, Joel; Duhamel, Erwan; Elleboode, Romain; Felix, Jerome; Grellier, Patrick; Huet, Jerome; Labastie, Jacques; Le Roy, Didier; Lizaud, Oceann; Manten, Marie-line; Martin, Stephane; Metral, Luisa; Nedelec, Daniel; Verin, Yves; Badts, Vincent.
This document presents all the techniques used in routine by Ifremer to estimate the age of fish from the calcified piece. The procedure for estimating age describes each technical stage from the taking of the calcified piece through to the supplying of key sizes/ages to the European work groups. This procedure is specific to each species and even each population of fish.
Tipo: Text
Palavras-chave: Poisson; TNPC; Préparation; Procédure; Age; Ecaille; Illicium; Otolithe; Sclérochronologie; Fish; TNPC; Preparation; Procedure; Age; Scale; Illicium; Otolith; Sclerochronology.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00000/7294/rapport-7294.pdf

Morphological variability of the shape of striped red mullet Mullus surmuletus in relation to stock discrimination between the Bay of Biscay and the eastern English Channel
Provedor de dados: 5
Autores: Mahe, Kelig; Villanueva, Ching-maria; Vaz, Sandrine; Coppin, Franck; Koubbi, Philippe; Carpentier, Andre.
Striped red mullet Mullus surmuletus L. 1758 is an economically important species in the Mediterranean Sea and in the northern Atlantic Ocean, where it is exploited from the Bay of Biscay to the southern North Sea (ICES, 2010). In Atlantic waters, there are two main areas where this species is caught, the Bay of Biscay and the eastern English Channel. This species was initially exploited by the Spanish fleets along the Spanish coast inside the Bay of Biscay. Originally considered as valuable by-catch (Marchal, 2008), the growing exploitation ofM. surmuletus and a conspicuous increase in landings in the English Channel and the southern North Sea by French, English and Dutch fleets have been observed from the 1990s onwards. This was attributed to an increase...
Tipo: Text
Palavras-chave: Stock identification; Head morphology; Fish body shape; Truss model; Morphometric analysis.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00185/29587/28050.pdf

Ecosystem trends: evidence for agreement between fishers' perceptions and scientific information
Provedor de dados: 5
Autores: 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

Estimation de la croissance journalière de juvéniles de poissons à partir des microstries observables à la surface des otolithes : cas de la plie et de la sole en Manche Est, du maigre dans le golfe de Gascogne et du merlu dans le golfe du Lion
Provedor de dados: 5
Autores: Mahe, Kelig; Elleboode, Romain; Bellamy, Elise.
Chez les poissons, l’âge est estimé à partir de l’analyse de pièces calcifiées (écaille, otolithe, vertèbre…). L'otolithe, situé dans l'oreille interne, est le plus utilisé en écologie car il est métaboliquement inerte et sa croissance est continue tout au long de la vie du poisson. Chaque poisson présente 3 paires d'otolithes (sagitta, lapillus et astericus) et leur forme sont différentes et spécifiques à chaque espèce. Le dénombrement des couches concentriques successives présentes sur les pièces calcifiées permettent d'estimer l'âge et la croissance somatique du poisson. Cependant, ces structures à la surface de l'otolithe peuvent présenter des échelles temporelles différentes. Chez les juvéniles, l'analyse des accroissements primaires traduit une...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00148/25904/23921.pdf

Fiches d’aide à l’identification. Poissons et céphalopodes de Manche et de mer du Nord
Provedor de dados: 5
Autores: Garren, Francois; Verin, Yves; Dufour, Jean-louis; Mahe, Kelig; Le Roy, Didier; Rostiaux, Emilie.
This document present identification fact sheets of fishes and cephalopods species frequently captured during scientific surveys in the English Channel and the North Sea. Simple and concise description of the morphological criteria enable a fast and easy discrimination between species that may be confused.
Tipo: Text
Palavras-chave: Identification; Poisson; Céphalopode; Manche; Mer du Nord; Identification; Fish; Cephalopod; English Channel; North Sea.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00326/43758/43302.pdf

Are red mullet efficient as bio-indicators of mercury contamination? A case study from the French Mediterranean
Provedor de dados: 5
Autores: Cresson, Pierre; Bouchoucha, Marc; Miralles, F.; Elleboode, Romain; Mahe, Kelig; Marusczak, Nicolas; Thebault, Herve; Cossa, Daniel.
Mercury (Hg) is one of the main chemicals currently altering Mediterranean ecosystems. Red mullet (Mullus barbatus and M. surmuletus) have been widely used as quantitative bio-indicators of chemical contamination. In this study, we reassess the ability of these species to be used as efficient bio-indicators of Hg contamination by monitoring during 18 months Hg concentrations in muscle tissue of mullet sampled from 5 French Mediterranean coastal areas. Mean concentrations ranged between 0.23 and 0.78 μg g−1 dry mass for both species. Values were consistent with expected contamination patterns of all sites except Corsica. Results confirmed that red mullets are efficient bio-indicators of Hg contamination. Nevertheless, the observed variability in Hg...
Tipo: Text
Palavras-chave: Mercury; Bio-indicator; Fish; Mullus spp.; Mediterranean.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00244/35514/34083.pdf

Otolithes (faces concave et convexe) des poissons du sud de la mer du Nord
Provedor de dados: 5
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00020/13100/10111.pdf

Age determination of Atlantic cod (Gadus morhua) : Results from an otolith exchange between Canada and France
Provedor de dados: 5
Autores: Healey, B.p; Mahe, Kelig; Cossitt, G.; Dufour, Jean-louis; Felix, Jerome; Hicks, H.f.; Hiscock, C.; Schwab, P.
Atlantic cod (Gadus morhua) in NAFO subDivision 3Ps are exploited and jointly managed by Canada and France. Assessments of stock status incorporate age determinations from both countries when dis-aggregating total catches into catch-at-age. An otolith exchange was initiated to evaluate the degree of consistency in the age determinations of Canadian and French personnel. Both graphical and statistical analysis clearly indicate differences in interpretation between Canadian and French readers, with ages assigned by Canadian personnel generally being one-year greater than those of participants from France. However, consistency in age determinations was relatively high within Canada and within France.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00035/14627/11905.pdf

Age, growth and feeding of anchovy (Engraulis encrasicolus L.) in the Bay of Bénisaf (SW Mediterranean , west Algerian coast)
Provedor de dados: 5
Autores: Bacha, Mahmoud; Amara, Rachid; Benmansour, N; Brylinski, Jean-michel; Moali, A; Mahe, Kelig.
Age, growth and feeding of anchovy were studied for the first time from samples collected in the Benisaf Bay (west Algerian coast) during summer (spawning period) and autumn (recruitment period) 2007. Age structure and growth parameters were determined by otolith (sagitta) analyses. The von Bertalanffy growth function fitted to age-length data showed that growth was almost achieved during the first year of life. Significant growth difference was recorded between males and females. Growth parameters were for females (L∞=17,46 cm, k=0,31 per year and t0= -3,46 years) and for male (L∞=16,67 cm, k= 0,35 per year and t0= -3,26 years). The parameters of the otoliths (surface, length, weight and width) were significantly correlated with age and fish length (LT)...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00012/12277/9068.pdf

Pièces calcifiées utilisées pour estimer l'âge des principales espèces de poissons du sud du golfe de Gascogne
Provedor de dados: 5
Autores: 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
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00256/36688/35296.pdf

Explorative analysis on red mullet (Mullus barbatus) ageing data variability in the Mediterranean
Provedor de dados: 5
Autores: 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

Rapport de faisabilité de l’estimation de l’âge du gardon (Rutilus rutilus)
Provedor de dados: 5
Autores: 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...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00212/32359/30814.pdf

Ontogenetic and spatial variation in the diet of hake (Merluccius merluccius) in the Bay of Biscay and the Celtic Sea
Provedor de dados: 5
Autores: 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 &gt; 23 cm. A change in fish prey was also size-dependent, because smaller hake (&lt; 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

Etude de la croissance des espèces profondes de l’île de la Réunion
Provedor de dados: 5
Autores: 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
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00256/36687/35293.pdf

Understanding the Population Structure of the European Anchovy (Engraulis encrasicolus) in the Black Sea, Mediterranean Sea and Northeast Atlantic Ocean by Using Otolith Shape Analysis
Provedor de dados: 5
Autores: 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...
Tipo: Text
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00436/54722/56157.pdf

Growth estimation of Merluccius merluccius off the northern coast of Tunisia
Provedor de dados: 5
Autores: 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

Blue whiting otoliths pair’s symmetry side effect
Provedor de dados: 5
Autores: Gonçalves, Patricia; Mahe, Kelig; Elleboode, Romain; Chantre, Celina; Murta, Alberto; Avila De Melo, Antonio; Cabral, Henrique.
Otoliths are paired calcified structures located in the inner ear of the teleost fishes. Fisheries scientists have been using the otoliths for a variety of applications as fish ageing, species identification and also species interaction. The symmetry between left and right otoliths is considered species dependent. The application of analysis techniques on otoliths images has been increasing in recent years. The diagnosis on otoliths symmetry as a species characteristic is currently being done. It is expected that the otolith surface (distal versus proximal) used to collect images should have no influence on the symmetry results. The goal of this study is to investigate if the otolith position (distal versus proximal) when analyse images has influence in...
Tipo: Text
Palavras-chave: Otoliths image analysis; Morphometry analysis; Fish otoliths; Marine science application; Elliptic Fourier analysis.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00388/49887/50448.pdf

Fishes from the Bay of Biscay : Growth curve (weight and size) and sexual maturity
Provedor de dados: 5
Autores: Leaute, Jean-pierre; Mahe, Kelig.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00019/13053/10091.pdf

Calcein and manganese experiments for marking the shell of the common cockle (Cerastoderma edule): tidal rhythm validation of increments formation
Provedor de dados: 5
Autores: 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

Comparing growth in surface and cave morphs of the species Astyanax mexicanus: insights from scales
Provedor de dados: 5
Autores: 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

A review of image-based tools for automatic fish ageing from otolith features
Provedor de dados: 5
Autores: 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
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00024/13519/10546.pdf

Estimation de l'âge du grenadier de roche en Atlantique Nord Boréal
Provedor de dados: 5
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00020/13109/10101.pdf

Projet DMX2 - Volet Croissance
Provedor de dados: 5
Autores: 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
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00347/45866/45554.pdf

Mortalité de Coques (Cerastoderma edule) observée en baie de Somme en mai 2008
Provedor de dados: 5
Autores: 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
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00011/12274/9065.pdf

Age precision and growth rate of Rhabdosargus haffara (Forsskål, 1775) from Hurghada fishing area, Red Sea, Egypt
Provedor de dados: 5
Autores: 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 &lt; 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 &gt; 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

Colloque National de Sclérochronologie « Structures dures et/ou calcifiées chez les organismes aquatiques : Leur utilisation en écologie halieutique ». 2 au 4 Juillet 2013, Rennes - Agrocampus Ouest. Programme et résumés
Provedor de dados: 5
Autores: 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...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00174/28518/26884.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

Estimation de l'âge de la morue en Manche orientale et sud mer du Nord
Provedor de dados: 5
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00020/13104/10119.pdf

Identifying blue whiting (Micromesistius poutassou) stock structure in the Northeast Atlantic by otolith shape analysis
Provedor de dados: 5
Autores: 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

Rapport de faisabilité de l’estimation de l’âge du Platax (Platax orbicularis) à Tahiti
Provedor de dados: 5
Autores: Elleboode, Romain; Mahe, Kelig.
L’équipe de l’IFREMER du centre de Polynésie et celle de la Cellule Innovation et Valorisation de la Direction des Ressources Marines de Polynésie Française mènent des travaux afin de maîtriser la zootechnie de l’élevage du Platax (Platax orbicularis) en lagon. Des connaissances sur la physiologie de la reproduction s’est faite sur ces animaux, mais aucune information n’est disponible quant à l’évolution de la productivité de ces animaux en fonction de leur croissance (pas de données d’âge). Le pôle national de sclérochronologie de l’Ifremer de Boulogne-sur-Mer a été sollicité pour réaliser une étude de faisabilité de l’estimation de l’âge de cette espèce. Pour cela, dans un premier temps des techniques de préparation ont été utilisées sur des otolithes de...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00180/29158/27563.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

Poissons de Manche orientale et sud mer du Nord : courbes de croissance (taille et poids) et maturité sexuelle
Provedor de dados: 5
Autores: Mahe, Kelig; Leroy, Didier; Carpentier, Andre.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00020/13099/10097.pdf

Poissons du Golfe de Gascogne: courbes de croissance (taille et poids) et maturité sexuelle
Provedor de dados: 5
Autores: Leaute, Jean-pierre; Mahe, Kelig.
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00019/13052/10047.pdf

Estimation de l'âge du lieu noir en mer du Nord
Provedor de dados: 5
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2007
URL: http://archimer.ifremer.fr/doc/00020/13111/10093.pdf

Age and Growth of Phycis Phycis (Linne, 1766) in the Gulf of Tunis
Provedor de dados: 5
Autores: Romdhani, Ahlem; Chater, Ines; Ktari, Mohamed Hédi; Dufour, Jean-louis; Mahe, Kelig.
The age of fish in a population is fundamental to most of the questions fishery biologists attempt to answer about that population. The aim of this study was to report the parameters of the weight-length relationship and to estimate the age and growth of Phycis phycis (Linnaeus, 1766) in Gulf of Tunis. A sample of 272 specimens of P. phycis was collected from the landings of the small-scale artisanal fisheries between September 2007 and June 2010. The total length (TL) ranged from 14 to 55.5cm and total weight (TW) from 45 to 1779g. Length-weight relationship were described by allometrically positive for the females (TW = 0.0083*TL3. 0703), males (TW= 0.0063*TL3.1471), and both sexes (TW= 0.0082*TL3. 0759). No significant differences were found between...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00117/22790/20592.pdf

Estimation de l'âge du merlan en Manche orientale et sud mer du Nord
Provedor de dados: 5
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00020/13103/10117.pdf

Estimation of Age, Growth and Fishing Season of a Palaeolithic Population of Grayling (Thymallus thymallus) Using Scale Analysis
Provedor de dados: 5
Autores: 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

Age and Growth of the lemon sole (Microstomus kitt) in the Celtic Sea and the North Sea
Provedor de dados: 5
Autores: Mahe, Kelig; Elleboode, Romain; Persohn, Cecile; Dufour, Jean-louis.
Age and growth of lemon sole (Microstomus kitt) were determined from 115 specimens collected in the Celtic Sea and in the North Sea in 2006 and 2007. Total length is ranged from 11 to 44 cm, while total weight varied between 12 and 1040 g. Age estimation was based on otoliths readings. The oldest male and female were estimated to be 9 years old. The length–weight relationships parameters for lemon sole in the Celtic Sea and in the North Sea were W=0.0043*TL3.2860 and W=0.0062*TL3.1505 respectively. Weight including both sexes increased with positive allometric growth. The von Bertalanffy growth equation in the North Sea was fitted on the basis of mean length-at-age data resulting in parameters values of TL∞ = 36.44 cm (S.E. = 0.484), K = 0.187 /y (S.E. =...
Tipo: Text
Palavras-chave: Lemon sole; Growth; Von Bertalanffy; Celtic Sea; North Sea.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00019/13024/10002.pdf

First record of Epinephelus marginatus (Serranidae: Epinephelinae) in the eastern English Channel
Provedor de dados: 5
Autores: 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

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

Relationship between somatic growth and otolith growth: a case study of the ornate jobfish Pristipomoides argyrogrammicus from the coast of Réunion (SW Indian Ocean)
Provedor de dados: 5
Autores: Mahe, Kelig; Aumond, Yoann; Rabhi, Khalef; Elleboode, Romain; Bellamy, Elise; Huet, Jerome; Gault, M.; Roos, David.
The ornate jobfish Pristipomoides argyrogrammicus Valenciennes 1832 occurs in the Indo-West Pacific Ocean, where it is harvested by small-scale coastal fisheries. Management of this species is hindered by lack of adequate biological data. We sampled a total of 113 individuals from the landings of local artisanal fishers on the island of Réunion (southwestern Indian Ocean), from March 2014 to March 2015. The relationships between two types of body length (total and standard length, cm) and total weight (g) were shown to be significant (p &lt; 0.05). The length–weight relationship was described by a power function, with the scaling factor estimated to be 0.008 and the exponent 3.146. Age was determined using whole otoliths. The von Bertalanffy growth...
Tipo: Text
Palavras-chave: Age estimate; General linear model; Lutjanidae; Modelled age; Morphometric parameters; Otolith morphometry; Reading precision.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00399/51017/51863.pdf

First record of Dadylopterus volitans (Dactylopteridae) in the Eastern English Channel
Provedor de dados: 5
Autores: Mahe, Kelig; Foucher, Eric; Elleboode, Romain; Iglesias, Samuel; Tetard, Alain.
The family Dactylopteridae comprises seven valid species mostly distributed in tropical and subtropical seas (Eschmeyer and Fong, 2013). The flying gurnard Dactylopterus volitans (Linnaeus, 1758) is present in the Eastern Atlantic, apparently from the North Sea to Angola, including the entire Mediterranean Sea and the Azores, and in the Western Atlantic, from Canada to Argentina (Froese and Pauly, 2013). It is the only species of the family Dactylopteridae present in the European Atlantic (from 36 degrees N to 66 degrees N) (Roux, 1986; Quero et al., 2003). The point map of D. volitans given in FishBase (Froese and Pauly, 2013) showed a single record in the Bay of Biscay and a single record point in the Southern North Sea, although the latter seems to be...
Tipo: Text
Palavras-chave: Dactylopteridae; Dactylopterus volitans; Atlantic Ocean; Eastern English Channel; First record.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00176/28747/27244.pdf

Diet is correlated with otolith shape in marine fish
Provedor de dados: 5
Autores: Mille, Tiphaine; Mahe, Kelig; Cachera, Marie; Villanueva, Ching-maria; De Pontual, Helene; Ernande, Bruno.
Previous studies have shown that food amount influence fish otolith structure, opacity and shape and that diet composition has an effect on otolith chemical composition. This study investigated the potential correlation between diet and otolith shape in 5 wild marine fish species by addressing 4 complementary questions. First, is there a global relationship between diet and otolith shape? Second, which prey categories are involved in this relationship? Third, what are the respective contributions of food quantity and relative composition to diet–otolith shape co-variation? Fourth, is diet energetic composition related to otolith shape? For each species, we investigated how otolith shape varies with diet. These questions were tackled by describing diet in...
Tipo: Text
Palavras-chave: Fourier analysis; English Channel; Interspecific; Morphometric analysis; Otolith growth; Saccular otolith; Stomach contents.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00345/45639/45269.pdf

Saumon (Salmo salar) d’Atlantique Nord-Ouest : Calibration Franco- Canadienne de l’estimation de l’âge. Rapport final du contrat SALMOCODAGE
Provedor de dados: 5
Autores: Mahe, Kelig; Deschamps, Denise; Elleboode, Romain; Goraguer, Herle.
France and Canada work together to follow the salmon populations (Salmo salar) of the North-western Atlantic, integrating the French territory of Saint Pierre and Miquelon (subdivision 3Ps). Ageing data are thus provided by these countries. The age estimation of salmon is carried out starting from the scales. These present two distinct areas because this migrating fish lives at first in rivers and the second part at sea with some passages in rivers (homing phenomenon). As a result of which, the interpretation of ages from these scales is difficult. The purpose of this meeting which was held in Saint-Pierre and Miquelon from the 10 to September 14, 2012 with French and Canadian scientists, was to measure and optimize the precision of the age data provided...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00116/22680/20415.pdf

Age, growth and mortality of Sciaena umbra (Sciaenidae) in the Gulf of Tunis
Provedor de dados: 5
Autores: Chater, Ines; Romdhani-dhahri, Ahlem; Dufour, Jean-louis; Mahe, Kelig; Chakroun-marzouk, Nadia.
The growth and mortality of the brown meagre, Sciaena umbra from the Gulf of Tunis, were investigated using a sample of 276 specimens, ranging from 15.3 to 49.2 cm total length and from 43 to 1565 g total weight. Specimens were collected from artisanal fisheries between October 2008 and September 2011. Otoliths were extracted, thin cross-sections were realized and radii were measured. The log-linear morphometric relationships between total length-total weight and total length-otolith radius were significant (p &lt; 0.05), showed positive allometry (b=3.15) and isometry (b=0.90), respectively. The marginal analysis suggested that only one growth increment was deposited per year. The maximum age of the brown meagre was 22 years for males and 31 years for...
Tipo: Text
Palavras-chave: Brown meagre; Thin otoliths; Growth; Mortality; Gulf of Tunis; Mediterranean Sea.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00424/53552/54415.pdf

Ageage des buccins (Buccinum Undatum L) de la cote Ouest-Cotentin (France) à partir des statolithes
Provedor de dados: 5
Autores: 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...
Tipo: Text
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00387/49801/50369.pdf

Activité et production des navires français – Façade "Manche est" et Façade "Loire-Gironde"
Provedor de dados: 5
Autores: 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

Croissance des juvéniles du merlu (Merluccius merluccius) des eaux septentrionales de la Tunisie à partir de l'analyse des microstructures des otolithes
Provedor de dados: 5
Autores: Khoufi, Widien; Elleboode, Romain; Jaziri, Héla; El Fehri, Safouène; Bellamy, Elise; Ben Meriem, Sadok; Romdhane, Mohamed; Mahe, Kelig.
Hake (Merluccius merluccius) is widely distributed in the Atlantic Ocean and the Mediterranean Sea. It is one of the most exploited demersal fish. In Tunisia, hake is captured from the north to the south (KHOUFI et al., 2010). Hake is an important species of economic interest and thus the subject of a large literature, but its biology remains insufficiently known, particularly on terms of age and growth estimations, which are essential for stock assessment and management. Otolith microstructure provides a useful tool for age determination of juvenile hake, based on daily increment deposition (ARNERI &amp; MORALES-NIN, 2000; MORALES-NIN et al., 2005; KACHER &amp; AMARA, 2005; BELCARI et al., 2006). Consequently, we studied growth and estimated age, using...
Tipo: Text
Palavras-chave: Merluccius merluccius; Microstructure journalière; Phase pélagique; Taux de croissance; Merluccius merluccius; Daily microstructure; Pelagic phase; Growth rate.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00116/22681/20416.pdf

Growth of the oblique-banded grouper (Epinephelus radiatus) on the coasts of Reunion Island (SW Indian Ocean)
Provedor de dados: 5
Autores: Mahe, Kelig; Rabhi, Khalef; Bellamy, Elise; Elleboode, Romain; Aumond, Yoann; Huet, Jerome; Cresson, Pierre; Roos, David.
The oblique-banded grouper, Epinephelus radiatus (Day, 1968), occurred within the whole Indo- West Pacific where it is harvested by small-scale coastal fisheries. The aim of this study was to estimate the growth of this species at Reunion Island (South-West Indian Ocean) since no study investigated this topic so far. Fifty-seven individuals were sampled in the landings of the French local artisanal fisheries from March 2014 to March 2015. The relationships between two types of body length (total and standard lengths, cm) and total weight (g) were significant (p &lt; 0.05). Total length-weight relationship was described by the following parameters: a = 0.01 and b = 3.098. For each individual, morphometry of the whole otolith was described with several...
Tipo: Text
Palavras-chave: Epinephelidae; Epinephelus radiatus; Otolith; Indian Ocean; Ageing; Otolith weight.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00313/42385/41723.pdf

Estimation de l'âge du grondin rouge de mer Celtique et du Golfe de Gascogne
Provedor de dados: 5
Autores: Bellamy, Elise; Mahe, Kelig.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00028/13887/11050.pdf

Gadoids
Provedor de dados: 5
Autores: Hussy, Karin; Morales-nin, Beatriz; Pineiro Alvarez, Carmen; De Pontual, Helene; Smith, Joanne; Mahe, Kelig; Krumme, Uwe; Songer, Sally; Walther, Yvonne; Rey, Javier.
This chapter was written during the Workshop on Age Validation of Gadoids (WKAVGS 2013) which was held 6–10 May 2013 at Imedea in Esporles, Mallorca. The terms of reference for the workshop were to: 1. Review information on age estimations, otolith exchanges, workshops, and validation works done so far on the following species: European hake, cod, pollock, saithe, haddock, whiting, and blue whiting; 2. Assemble and compare the results of different validation methods (i.e. marking and recapture, marking the calcified structure, marginal increment analysis, marginal analysis, modal progression analysis, length back-calculation, etc.); 3. Discuss and propose the most appropriate validation methods of age and growth pattern of calcified structures (CS), for...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00620/73189/72379.pdf

Directional bilateral asymmetry in otolith morphology may affect fish stock discrimination based on otolith shape analysis
Provedor de dados: 5
Autores: Mahe, Kelig; Ider, Djamila; Massaro, Andrea; Hamed, Oussama; Jurado-ruzafa, Alba; Goncalves, Patricia; Anastasopoulou, Aiketerini; Jadaud, Angelique; Mytilineou, Chryssi; Elleboode, Romain; Ramdane, Zohir; Bacha, Mahmoud; Amara, Rachid; De Pontual, Helene; Ernande, Bruno.
Otolith shape analysis is an efficient fish stock identification tool. However, most applications used left and right otoliths or only one of them arbitrarily chosen without testing for biases resulting from potential directional bilateral asymmetry (DA) in otolith shape, i.e. a unimodal population-level deviation form bilateral symmetry between right and left otolith shapes. In this study, 560 bogues (Boops boops) were sampled from 11 geographical locations from the Canary Islands to the Aegean Sea and elliptical Fourier descriptors were used to describe their otoliths’ shape. First, a significant otolith DA was observed at the global scale with an average amplitude of 2.77%. However, at the scale of sampling locations, DA was not always significant and...
Tipo: Text
Palavras-chave: Boops boops; Elliptical Fourier analysis; Mediterranean Sea; Side effect; Stock identification.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00468/57967/60418.pdf

Size-effect, asymmetry, and small-scale spatial variation in otolith shape of juvenile sole in the Southern North Sea
Provedor de dados: 5
Autores: Delerue-ricard, Sophie; Hanna, Stynen; Barbut, Léo; Morat, Fabien; Mahe, Kelig; Hablützel, Pascal I.; Hostens, Kris; Volckaert, Filip.
While otolith shape analysis can provide a valuable tool for discriminating between fish populations, factors which may influence otolith shape, such as the effect of size, directional asymmetry in growth, and local environmental conditions, are often unknown. Here, we analyzed differences in otolith shape across three size classes of age-0 common sole Solea solea L. from nursery grounds off the Belgian coast and in the Wadden Sea. Across size classes, form-factor decreased and roundness remained consistently high in both nursery grounds, while ellipticity increased in the Belgian nursery. Directional asymmetry between left and right otoliths measured by Fourier coefficients accounted for 0.96 and 7.2% of the variance when comparing otoliths overall, and...
Tipo: Text
Palavras-chave: Early-life stages; Fourier coefficients; Nursery ground; Otolith shape; Small-scale spatial structure.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00453/56476/58866.pdf

Shell Shape Analysis and Spatial Allometry Patterns of Manila Clam (Ruditapes philippinarum) in a Mesotidal Coastal Lagoon
Provedor de dados: 5
Autores: Caill-milly, Nathalie; Bru, Noelle; Mahe, Kelig; Borie, Catherine; D'Amico, Franck.
While gradual allometric changes of shells are intrinsically driven by genotype, morphometrical shifts can also be modulated by local environmental conditions. Consequently the common use of a unique dimension (usually length) to assess bivalves’ growth may mask phenotypic differences in valve shape among populations. A morphometric exhaustive study was conducted on Manila clam, Ruditapes philippinarum, by acquiring data in the French Arcachon Bay (intrasite phenotypic variability) and by comparing with other sites in the literature (intersite phenotypic variability). 2070 shells were subsampled, weighted, and automatically measured using TNPC software. Some ratios’ values indicate a relatively round and globular shape shell in comparison with other sites...
Tipo: Text
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00116/22684/20420.pdf

Evidence of a relationship between weight and total length of marine fish in the North-eastern Atlantic Ocean: physiological, spatial and temporal variations
Provedor de dados: 5
Autores: 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

Estimation de l'âge de la sole en Manche et sud mer du Nord
Provedor de dados: 5
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00020/13106/10107.pdf

Length structures and maturity ogive for Atlantic Halibut (Hippoglossus hippoglossus) from St-Pierre et Miquelon fishery in NAFO subdivision 3Ps in 2014.
Provedor de dados: 5
Autores: Vigneau, Joel; Claireaux, Daniel; Goascoz, Nicolas; Goraguer, Herle; Mahe, Kelig.
The Atlantic halibut stock area comprises the NAFO subdivisions 3NOPs4VWX5Zc where total international catches has increased to about 2300 tonnes in 2013 and the TAC for 2014 has been set to 2563 tonnes. The St-Pierre et Miquelon uptake of the overall quota varies between 2 to 6 % over the last 10 years.  In 2014, responding to a demand for improving the scientific cooperation, by the Canada France Consultative Committee (CFCC) for 3Ps management, SPM began the monitoring of the autumn fishery by on-board observer. The objectives were to provide the stock assessment working group with information on maturity given that the fishery is fishing on a spawning ground.
Tipo: Text
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00270/38074/36194.pdf

Metazoan ectoparasites of two teleost fish, Boops boops (L.) and Mullus barbatus barbatus L. from Algerian coast: diversity, parasitological index and impact of parasitism
Provedor de dados: 5
Autores: 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

Variability of PCB burden in 5 fish and sharks species of the French Mediterranean continental slope
Provedor de dados: 5
Autores: 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

Utility of mixed effects models to inform the stock structure of whiting in the Northeast Atlantic Ocean
Provedor de dados: 5
Autores: Barrios, Alexander; Ernande, Bruno; Mahe, Kelig; Trenkel, Verena; Rochet, Marie-joelle.
Stock structure of whiting (Merlangius merlangus) in the North East Atlantic is unclear. This study uses mixed effects models to analyse growth variability as a way to investigate stock identification. Growth trajectories for 634 individuals and length-at-age data for 78,686 individuals were analysed for spatial coherence and temporal synchrony in the parameters of the von Bertalanffy growth model. Growth was found to differ among most ICES divisions, and temporal fluctuations were poorly synchronized between areas. This study illustrates how growth analyses can contribute to stock identification, in addition to other data.
Tipo: Text
Palavras-chave: Growth; Whiting; North East Atlantic; Otolith; Von Bertalanffy growth model; Mixed effects models.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00373/48415/48810.pdf

Synthèse bibliographique des principales espèces de Manche orientale et du Golfe de Gascogne
Provedor de dados: 5
Autores: Mahe, Kelig; Delpech, Jean-paul; Carpentier, Andre.
This report is a result of a contract between Ifremer and the French Ministry of Industry. The aim was to provide an up-to-date of the description of the main fishing species biology in the Bay of Biscay and the Eastern Channel.
Tipo: Text
Palavras-chave: Biological parameters; Life cycle; Food; Environment; Spatial distribution; Paramètres biologiques; Cycle de vie; Alimentation; Environnement; Répartition géographique.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/rapport-6643.pdf

Poissons de Manche et sud Mer du Nord. Courbes de croissance en longueur totale et poids entier âge de maturité sexuelle
Provedor de dados: 5
Autores: Mahe, Kelig; Le Roy, Emilie.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00487/59912/63093.pdf

Possible link between prey quality, condition and growth of juvenile hake (Merluccius merluccius) in the Gulf of Lions (NW Mediterranean)
Provedor de dados: 5
Autores: Harmelin Vivien, Mireille; Mahe, Kelig; Bodiguel, Xavier; Mellon, Capucine.
The energy value of the main prey and the growth of juvenile hake in the Gulf of Lions were analysed to determine whether fish condition could be linked to difference in prey quality and resulted in growth difference. Large differences in energy content (15.6 to 23.6 kJ g(-1) DW) among prey types were recorded with low values found in amphipods and natantid shrimps, intermediate values in euphausiids and mysids, and high values in fish. High condition in juvenile hake was linked to the consumption of prey with high energy content. However, no difference in fish growth was observed by the analysis of otolith micro-increments.
Tipo: Text
Palavras-chave: Merluciidae; Merluccius merluccius; Hake; Mediterranean Sea; Energy; Condition; Otolith microstructure.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00092/20332/18611.pdf

Report of the Saithe (Polliachius virens, L.) Otolith Exchange Scheme 2007-2008
Provedor de dados: 5
Autores: Mahe, Kelig.
The Planning Group on Commercial Catch, Discards and Biological Sampling (PGCCDBS) meeting in March 2005 (ICES, 2005), identified saithe as one of the species requiring confirmation of ages being assigned by Fisheries Institutes. The planning group indicated that the IFREMER, France should be responsible to organising a saithe otolith exchange (ICES, 2005). According to the PGCCDBS meeting 2006, the saithe otolith exchange in 2005 has been postponed to 2006. Ifremer (France) would be responsible for the organisation and analysis of the otoliths exchange for ICES areas IV and VI (ICES, 2006). 10 countries took part in this exchange : Denmark, Faroe Islands, France, Germany, Iceland, Norway, Sweden, UK England, UK Northern Ireland &amp; UK Scotland. The...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00225/33631/32029.pdf

Estimation de l’âge du merlan (Merlangius merlangus) ?
Provedor de dados: 5
Autores: Dufour, Jean-louis; Chantre, Celina; Elleboode, Romain; Mahe, Kelig.
Le merlan (merlangius merlangus) est une espèce commerciale importante suivie au niveau européen. La pièce calcifiée utilisée pour l’estimation de l’âge du merlan est l'otolithe. Parmi les 3 paires d'otolithes, ce sont toujours les plus gros, les sagittae qui sont utilisés. Ils conservent la séquence complète des marques de croissance enregistrées (Panfili et al., 2002). Pour observer au mieux ces structures, la technique de coupe transversale a été retenue comme la plus précise (ICES WKARWHG2 REPORT 2016). Les images obtenues sont soumises à l’interprétation par les experts européens. Ce rapport propose de décrire précisément les structures observables sur les images obtenues par la technique de coupe transversale. La variabilité des structures est...
Tipo: Text
Palavras-chave: Merlan; Otolithe; Age; Radiale; Analyse d’images; Croissance.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00627/73941/73376.pdf

Diet Composition and Feeding intensity of Brown Meagre Sciaena Umbra Linnaeus, 1758 (TELEOSTEI, SCIAENIDAE) in the Gulf of Tunis
Provedor de dados: 5
Autores: 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
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00117/22791/20593.pdf

Evolution du logiciel TNPC de la version 5 à la version 7
Provedor de dados: 5
Autores: 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,...
Tipo: Text
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00276/38692/37193.pdf

Comparison between the opercular bones, the scales and the otoliths to investigate the growth of the brilliant pomfret (Eumegistus illustris) off the coast of Reunion Island (SW Indian Ocean)
Provedor de dados: 5
Autores: Mahe, Kelig; Rabhi, Khalef; Bellamy, Elise; Elleboode, Romain; Aumond, Yoann; Huet, Jerome; Roos, David.
The brilliant pomfret (Eumegistus illustris) occurs in the western part of the Indian Ocean and the western and central Pacific Ocean. To date, the biology of E. illustris has never been documented. The aim of the present study was to investigate age and growth of E. illustris along the coasts of Reunion Island, based on calcified structures analysis. One hundred thirty five individuals were sampled in the landings of the French local artisanal fisheries from March 2014 to March 2015. The relationships between two types of body length (Total and Standard lengths, cm) and Total weight (g) were significant (P&lt;0.05). Total length-weight relationship was described by the following parameters: a=0.012 and b=3.015 without significant effect of sexual...
Tipo: Text
Palavras-chave: Eumegistus illustris; Growth; Scale; Otolith; Opercular bone; Indian Ocean; Reunion island.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00307/41861/41113.pdf

Report of the pollack (Pollachius pollachius) Exchange 2016
Provedor de dados: 5
Autores: Mahe, Kelig; Dufour, Jean-louis; Mccausland, Ian; Sainza, Maria; Leal, Ana; Gonzalez, Cristina; Elleboode, Romain.
In September 2015, the Working Group on Biological Parameters (WGBIOP) recommended the first otolith exchange for Pollachius pollachius in 2016 (Otolith Exchanges proposals for 2016/2017; ICES, 2015). Kélig Mahe (IFREMER, France) was decided to be the responsible to organise this otolith exchange. A total of 5 readers from 2 countries (France &amp; Spain) participated at the exchange of 2016. The otoliths of 314 individuals sampled from 2011 to 2015 in Southern stock (ICES area: IXa; n=99) and in (ICES areas: IVc, VIId, VIIe, VIIj-h; n=215) were used for this exchange. For the Northern stock, the precision values for both stocks were very high but the value for Northern stock (PA=91.6%, CV=3.8%; APE= 0.8%) was higher than this for Southern stock (PA=74.5%,...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00351/46200/45899.pdf

Sources of otolith morphology variation at the intra-population level: directional asymmetry and diet.
Provedor de dados: 5
Autores: Mille, Tiphaine; Ernande, Bruno; De Pontual, Helene; Villanueva, Ching-maria; Mahe, Kelig.
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00339/45052/44455.pdf

Identification des habitats de nourriceries de poissons à partir d'indicateurs faunistiques. Qualité de ces habitats pour les juvéniles de soles en estuaire de Seine
Provedor de dados: 5
Autores: Morin, Jocelyne; Le Pape, Olivier; Amara, R; Mahe, Kelig; Gilliers, C.
Numerous marine fish species spend some time, within their biological cycle, in the restricted and unstable habitats that are coastal and estuarine feeding grounds. These ecosystems are essential for the growth and survival of young fishes. Some recent studies, conducted in the framework of the "Seine Aval 1 and 2" programs and of other projects, demonstrated that the Seine estuary was home to large numbers of juveniles (Morin et al., 1997) but that this estuary was subjected to a strong anthropic pressure interfering with the feeding ground function it should normally play. There is, indeed, a paradox between the nutritive availabilities provided by the estuary and the ichtyic communities exploiting this resource (Mouny, 1998); and this observation is...
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-6594.pdf

Analyses sclérochronologiques d’écailles archéologiques d’ombres commun Thymallus thymallus et inférences sur la pêche paléolithique au Taillis des Coteaux (Vienne, France)
Provedor de dados: 5
Autores: Guillaud, Emilie; Elleboode, Romain; Bearez, Philippe; Mahe, Kelig.
Lors des fouilles archéologiques du Taillis des Coteaux, plus de 791 écailles ont été mises au jour dans une zone attribuée chronologiquement au Magdalénien inférieur. L’origine (animale ou anthropique) des accumulations de poissons dans les sites archéologiques est souvent méconnue. L’application de la sclérochronologie à l’étude de ces restes nous permet non seulement d’avoir une estimation de l’âge du poisson, mais aussi de préciser la période de capture. La connaissance de la saison de mort des individus est un bon indicateur des activités humaines et/ou d’autres prédateurs (carnivores, oiseaux). La majorité des écailles est attribuable aux salmonidae. Parmi les espèces identifiées, seul l’ombre commun Thymallus thymallus (L., 1758) est bien...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00187/29805/28251.pdf

Cod (Gadus morhua) in the Celtic Sea otolith exchange 2016.
Provedor de dados: 5
Autores: Mahe, Kelig; Dufour, Jean-louis; Brown, D; Smith, J; Beattie, S; Woods, F.
In this working document, the results of an otolith exchange 2016 on Cod (Gadus morhua) in the Celtic Sea are presented. Each year, stock assessment of cod in the Celtic Sea requires data to be compiled and compared. For example the age distribution from this year’s assessment is compared to historical data. In 2016, there has been a small number of one year olds. Consequently, the three main countries (France, Ireland and UK England) which contribute to the cod landings in Celtic Sea organised a small otolith exchange to verify the precision of age data between four readers. Mean precision of age estimate for individual fish had a coefficient of variation (CV) of 0.2% and percent agreement to modal age of 99.5%. There was only one image where two readers...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00333/44437/44105.pdf

Report of the Seabass (Dicentrarchus labrax) Otolith and Scale Exchange Scheme 2011
Provedor de dados: 5
Autores: Mahe, Kelig; Holmes, Alison; Huet, Jerome; Sevin, Karine; Elleboode, Romain.
For seabass (Dicentrarchus labrax), Otolith and Scale Exchange Scheme 2011 was the first exchange. A total of 155 fish from Eastern English Channel (ICES area : VIId) was sampled on-board French research vessels (Gwen-Drez and Thalassa) during 2 international surveys (Channel Ground Fish Survey and International Bottom Trawl Survey). The length range of the fish was between 17 and 74 cm, with a mean length at 46.99 cm. For each fish, the Sagittae otoliths and few scales were used to compare the age estimation between both calcified pieces. 4 readers were participated from UK England (1 reader) and France (3 readers). Only images were used during this exchange. There were noted by the readers that it was very difficult to obtain an image of the scale with...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00063/17433/14940.pdf

Morphometry and growth of a Bivalve : the common cockle, Cerastoderma edule in the Bay of Somme
Provedor de dados: 5
Autores: Bellamy, Elise; Mahe, Kelig; Lefebvre, Alain.
Cockle (Cerastoderma edule) growth has not been studied a lot yet and the current approach of counting external ridges in order to make age estimation is limited. Nevertheless, growth is a key parameter for the monitoring of bivalve populations, which are heavily exploited in French estuaries. This morphometric study is based on the analysis of cockles shells collected in the Bay of Somme. This site, which has an area of 70 km², is located in the eastern Channel in the north of France, and is one of the most important French cockles fields.  This analysis is part of a study of the dynamic of cockles stocks in the Bay of Somme, which shows sharp inter-annual abundance fluctuations. High-resolution pictures analysis were performed with the TNPC software...
Tipo: Text
Ano: 2008
URL: http://archimer.ifremer.fr/doc/00011/12269/9055.pdf

Estimation de l'âge de l'églefin en mer du Nord
Provedor de dados: 5
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00020/13102/10115.pdf

Poissons du Golfe de Gascogne. Courbes de croissance en longueur totale et poids entier. Age de maturité sexuelle.
Provedor de dados: 5
Autores: Leaute, Jean-pierre; Mahe, Kelig; Le Roy, Emilie.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00506/61798/65802.pdf

Suivi 2013 des captures d'anguilles pour la DCF : analyse des otolithes
Provedor de dados: 5
Autores: Bellamy, Elise; Sevin, Karine; Penil, Caroline; Mahe, Kelig.
Ce rapport synthétise l'analyse des otolithes d'anguilles prélevés en 2013 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). 240 anguilles ont été prélevées en septembre/octobre 2013 dans le lac de Grand Lieu, la Dordogne et la Garonne. La relation entre la longueur totale (Lt) et le poids total (W) des anguilles prélevées en 2013 dans toute la France est du type W = 3.10-7.Lt3,273. Ainsi, les anguilles présentent une allométrie majorante (b=3,273) 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 otolithes, pièces calcifiées de...
Tipo: Text
Palavras-chave: Anguille; Otolithe; Age; Dordogne; Garonne; Lac de Grand Lieu.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00310/42081/41384.pdf

Report of the striped red mullet (Mullus surmuletus) and red mullet (Mullus barbatus) Exchange 2016
Provedor de dados: 5
Autores: Mahe, Kelig; Anastasopoulou, A; Bekas, P; Carbonara, P; Casciaro, L; Charilaou, C; Elleboode, Romain; Gonzalez, N; Guijarro, B; Indennidate, A; Kousteni, V; Massaro, A; Mytilineou, Ch; Ordines, F; Palmisano, M; Panfili, M; Pesci, P.
In September 2015, the Working Group on Biological Parameters (WGBIOP) recommended an otolith exchange for Mullus surmuletus and Mullus barbatus in 2016 (Otolith Exchanges proposals for 2016/2017; ICES, 2015). Kélig Mahe (IFREMER, France) was decided to be the responsible to organise this otolith exchange. Two otolith exchanges (2008, 2011), and two age reading workshops (ICES, 2009; 2012), have been taken place until now (Mahé et al., 2012). A total of 13 readers from 5 countries (France, Spain, Italy, Cyprus and Greece) participated at the exchange of 2016. The otoliths of 465 individuals (345 M. barbatus &amp; 120 M. surmuletus), sampled from 2011 to 2014 in the Mediterranean Sea (Central Adriatic Sea, Cyprus, Levantine Spain coasts, Balearic Islands)...
Tipo: Text
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00348/45922/45615.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

Otolith growth and age estimation of bastard grunt, Pomadasys incisus (Actinopterygii: Perciformes: Haemulidae), in the Gulf of Tunis (Central Mediterranean).
Provedor de dados: 5
Autores: 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

Croissance de la palourde japonaise (Venerupis philippinarum) : périodicité des micro-incréments et taux de croissance journaliers en fonction de la taille et des conditions environnementales par marquage à la calcéine
Provedor de dados: 5
Autores: Caill-milly, Nathalie; Mahe, Kelig; Bellamy, Elise; D'Amico, Franck.
L’exploitation de la palourde japonaise (Venerupis philippinarum) dans le bassin d’Arcachon constitue une activité socio-économique importante pour l’Aquitaine avec environ 500 tonnes capturées pour un chiffre d’affaires annuel estimé à 1,5 M€. Au côté des mesures de conservation (taille minimale fixée à 35 mm) décidées au niveau européen, la gestion de cette espèce est effectuée au niveau régional via des mesures adoptées par les structures représentant la pêche professionnelle. Le choix de ces mesures s’appuie largement sur des travaux scientifiques (suivis et recherches) démarrés en 2005. Ces derniers portent notamment sur l’amélioration des connaissances de la dynamique de ce stock et s’intéressent en particulier aux conditions de croissance...
Tipo: Text
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00148/25906/23923.pdf

Automatic Fish Ageing (AFISA)
Provedor de dados: 5
Autores: Mahe, Kelig; Parisi, Vincenc; Carbini, Sebastien; Soria, J.a.; Harbitz, A; De Pontual, Helene; Cotano, U; Songer, S; Millner, R; Lewy, P; Gudmundsson, E.f; Fablet, Ronan; Benzinou, Abdesslam.
Most of the fish stocks are assessed using age-based models, however age estimations using otoliths costs several million euros annually. In this context, Automatic Fish Ageing (EU Project) would provide means to standardize ageing among laboratories and build interpreted image databases ensuring the information conservation. Automation improves growth studies while reducing the cost of the acquisition of age data. The whole processing chain from the acquisition of otolith data to the actual ageing issue using pattern recognition or statistical inference has been realised for three case studies : a) Cod (Gadus morhua ; Faeroes, North Sea, North East Arctic) b) Anchovy (Engraulis encrasicolus ; Bay of Biscay) c) Plaice (Pleuronectes platessa, Eastern...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00011/12270/10548.pdf

Lost in the North: The first record of Diretmichthys parini (Post and Quéro, 1981) in the northern North Sea
Provedor de dados: 5
Autores: Cresson, Pierre; Rouquette, Manuel; Marco-miralles, Francoise; Dufour, Jean-louis; Causse, Romain; Bouchoucha, Marc; Mahe, Kelig.
In June 2015, an individual of Diretmichthys parini (Post and Quero, 1981) was trawled at 530 m depth, in the North Sea off Norway and donated to research. This capture, the first for this species in the North Sea was the northernmost recorded so far, and provided an opportunity to document some aspects of the biology and ecology of this data-poor species. This individual was a female, 331 mm total length of 33 years old, with low mercury content in muscle and liver (~ 0.2 μg g− 1 wet mass). Stable isotope ratios (C and N) in muscle and liver were consistent with the planktonic diet expected for this species. The capture of this fish at the northern latitude known so far would be consistent with the extension of the home range and the latitudinal shift...
Tipo: Text
Palavras-chave: Diretmichthys parini; Diet; North Sea; Latitudinal shift; Mercury.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00357/46805/46977.pdf

Habitat discrimination of big-scale sand smelt Atherina boyeri Risso, 1810 (Atheriniformes: Atherinidae) in eastern Algeria using somatic morphology and otolith shape
Provedor de dados: 5
Autores: Boudinar, A. S.; Chaoui, L.; Mahe, Kelig; Cachera, M.; Kara, M. H.
Somatic morphology and otolith shape were used to discriminate four samples of Atherina boyeri from three different habitats: Mellah lagoon (n = 269), Annaba Gulf (144 punctuated and 194 unpunctuated individuals) and Ziama inlet (n = 147) in eastern Algeria. For each individual, somatic morphology was described with 13 metrics and eight meristic measurements, while the otolith contour shape of 452 individuals from the three habitats was analysed using Fourier analysis. Then, two discriminant analyses, one using the 13 metric measurements and the other using Fourier descriptors, were used in order to discriminate populations of A. boyeri. The results of the discriminant analyses based on the two methods were similar, and showed that this species could be...
Tipo: Text
Palavras-chave: Sand smelt; Otoliths; Morphology; Mediterranean; Algeria.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00270/38079/36303.pdf

Estimation de l'âge du rouget barbet de roche en Manche orientale et sud mer du Nord
Provedor de dados: 5
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/00020/13110/10095.pdf

Estimation de l'âge de la plie en Manche orientale et sud mer du Nord
Provedor de dados: 5
Autores: Mahe, Kelig; Elleboode, Romain.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00020/13105/10109.pdf

Débarquements internationaux. Façade "Manche est"
Provedor de dados: 5
Autores: Mahe, Kelig; Delpech, Jean-paul; Coppin, Franck; Carpentier, Andre.
This report is a result of a contract between Ifremer and the French Ministry of Industry. The aim was to map the fishery activity and landings for french and some international fishing vessels in the Eastern Channel, vessels which length is more than 10 meters.
Tipo: Text
Palavras-chave: The Netherlands; Belgium; England; Germany; France; Landings; Western Channel; Eastern Channel; Pays Bas; Belgique; Angleterre; Allemagne; France; Production; Débarquements; Manche est; Manche orientale.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-6646.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

Description de l’activité des navires capturant le rouget barbet. Evolution des captures et des débarquements sur la période 2000-2011
Provedor de dados: 5
Autores: Mahe, Kelig; Vermard, Youen; Berthou, Patrick; Leblond, Samuel; Pitel-roudaut, Mathilde.
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00110/22163/19816.pdf

Length - Weight relationship and condition factor of Phycis phycis (Linnaeus, 1766) and Phycis blennoides (Brünnich, 1768) [Actinopterygii, Gadiform, Phycidae] in the Gulf of Tunis
Provedor de dados: 5
Autores: Romdhani, Ahlem; Ktari, M.h.; Mahe, Kelig.
In our study length-weight relationship are presented for 213 Phycis phycis and 270 Phycis blennoides caught between September 2007 and August 2008 and collected from trawler fishing in the Gulf of Tunis. The length-weight relationships and the condition factor were computed separately for sexes and for different seasons. The parameters of the length-weight relationship for the population as a whole are all well correlated (r²&gt; 0.92, p &lt;0.001). The type of growth is isometric for P. phycis while it is majorant allometry for P. blennoides The comparison of the regression of the weight according to the total length of males and females, of the two species, shows that the growth is therefore identical. The study of seasonal Variations indicates that the...
Tipo: Text
Palavras-chave: Phycis phycis; Phycis blennoides; Length- weight; Growth; Condition factor; Relation taille-poids; Croissance; Facteur de condition.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00280/39154/37717.pdf

Estimation de l'âge de la daurade royale en Méditerranée (Golfe du Lion)
Provedor de dados: 5
Autores: Mahe, Kelig.
Tipo: Text
Ano: 2006
URL: http://archimer.ifremer.fr/doc/00020/13108/10103.pdf

TNPC User guide
Provedor de dados: 5
Autores: Mahe, Kelig; Fave, Sébastien; Couteau, Jean.
TNPC 5 is a dedicated software aimed to assist Calcified Structure interpretation, financed by the French institute IFREMER. Several years have been necessary to develop this software. The project begun in 1994 with Hervé Troadec's work, then other people contributed to it such as Ronan Fablet, Hélène de Pontual and André Ogor. TNPC provides several features that will be explained in details in this documentation : -Manage databases of images and associated data, -Batch processes on CS images, -Image acquisition with automatic stage, scanners, mosaics, -Save predefined data (radials, intensity curves) and user data (for example age interpretation). TNPC is based on the Visilog 6™ platform.
Tipo: Text
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00032/14288/11567.pdf

Estimation de l'âge de la plie cynoglosse en Manche orientale et sud mer du Nord
Provedor de dados: 5
Autores: Elleboode, Romain; Mahe, Kelig.
Tipo: Text
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00020/13112/10092.pdf

Guide de prélèvements et d’envoi des pièces calcifiées
Provedor de dados: 5
Autores: Bled--defruit, Geoffrey; Chantre, Celina; Dufour, Jean-louis; Elleboode, Romain; Tribouilloy, Karine; Telliez, Solene; Badts, Vincent; Mahe, Kelig.
Ce guide présente les modes et règles de prélèvement puis d'envois des pièces calcifiées dans le cadre de réseaux d’observation coordonnés au niveau international, en particulier au sein du règlement européen sur la collecte des données halieutiques (DCF jusqu'en 2013 puis DCMAP, Data Collection Multi Annual Programme à partir de 2014). Ce guide a pour but de standardiser les prélèvements effectués à l'Ifremer. Il reprend et complète la synthèse française des procédures d'estimation d'âge (Mahé et al., 2009) et le manuel d'utilisation du fichier : "Parametres biologiques v8.xls" (Mahé et al., 2007). Les procédures décrites dans ce guide sont conformes aux référentiels de la base Harmonie de l'Ifremer.
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00116/22764/64995.pdf

Le rouget barbet de roche Mullus surmuletus (L. 1758) en Manche orientale et mer du Nord.
Provedor de dados: 5
Autores: Mahe, Kelig; Destombe, A.; Coppin, Franck; Koubbi, P.; Vaz, Sandrine; Le Roy, Didier; Carpentier, Audrey.
General introduction: The red mullet is among the fish that are the most popular and that have been known of for the longest amount of time. The Greeks and the Romans have left us in their literature famous pages in which they praise the quality and beautiful colours of their gurnards and their mulles. Also, the skin of this fish has been very popular since earliest antiquity:   It is said that for the Romans, a beautiful fish was worth more than the man who had caught it! Moreover, at feasts, a red mullet was displayed in a vase to amuse the guests with the changes of colour (Bloch, 1793).  The red rock mullet (Mullus surmuletus) is a benthic fish, which means it lives near the sea bottom. It is geographically present in the Atlantic Ocean from the coasts...
Tipo: Text
Palavras-chave: Sig; North sea; English channel; Population dynamic  data; Habitat; Spatial repartition; Biology; Mullus surmuletus.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/rapport-2351.pdf

Black scorpionfish Scorpaena porcus (Scorpaenidae): a first record in the eastern English Channel
Provedor de dados: 5
Autores: Mahe, Kelig; Goascoz, Nicolas; Dufour, Jean-louis; Iglesias, Samuel; Tetard, Alain.
This is the first record of the black scorpionfish Scorpaena porcus being found in the eastern English Channel. A specimen was caught on 15 October 2012 off the port of Courseulles-sur-mer. It measured 31.6 cm and weighted 800 g. From a study of its sagittal otolith, this specimen appeared to be 9 years old.
Tipo: Text
Palavras-chave: Scorpaena porcus; First record; Eastern English Channel; Atlantic Ocean; Otolith.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00173/28418/26748.pdf

Report of the Seabass (Dicentrarchus labrax) Otolith and Scale Exchange Scheme 2013
Provedor de dados: 5
Autores: Mahe, Kelig; Sevin, Karine; Moerman, Martine; Holmes, Alison.
The ICES Planning Group on Commercial Catch, Discards and Biological Sampling (PGCCDBS) identified the need of a seabass Dicentrarchus labrax) otolith exchange to take place in 2013. It was the second exchange after that’s of 2011. The IFREMER institute coordinated this exchange. A total of 223 fish from the bay of Biscay (ICES area : VIII, N=29), the Eastern English Channel (ICES area : VIId, N=149) and the North Sea (ICES area : IV, N=45) was sampled onboard French research vessels (Gwen-Drez and Thalassa) during 3 international surveys (EVHOE, CGFS and IBTS). The length range of the fish was between 26 and 71 cm, with mean 42.3 cm. For each fish, the Sagittae otoliths and few scales were used to compare the age estimation between the both calcified...
Tipo: Text
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00185/29596/27963.pdf

Sclérochronologie appliquée aux bivalves : Modèles coque et palourde
Provedor de dados: 5
Autores: Bellamy, Elise; Mahe, Kelig.
La sclérochronologie vise à reconstruire l’histoire vécue par les organismes vivants à partir de l’étude de leurs pièces calcifiées. Chez les poissons osseux, l’otolithe est la pièce calcifiée plus fréquemment utilisé. La caractéristique de ces pièces calcifiées est qu’elles grandissent avec l’individu et donc peuvent témoigner de la croissance de celui-ci. Les mollusques bivalves, comme leur nom l’indique, ne présentent pas de squelette interne. Leur corps mou grandit et se développe au sein d’une coquille calcique, qui s’articule tant comme squelette externe, que comme une barrière protectrice vis à vis du milieu extérieur. Ainsi, au fur et à mesure de sa croissance, l’animal minéralise progressivement sa coquille afin de permettre le développement de sa...
Tipo: Text
Ano: 2011

Effects of temperature on growth and metabolism in a Mediterranean population of European sea bass, Dicentrarchus labrax
Provedor de dados: 5
Autores: 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

Age determination of Atlantic cod (Gadus morhua): 2012 Workshop between Canada and France on cod otoliths. Final report of the project SALMOCODAGE
Provedor de dados: 5
Autores: Mahe, Kelig; Schwab, Philippe; Hiscock, Charlie; Cossitt, Gus; Briand, Daniel; Goraguer, Herle.
France and Canada have been working closely together for numerous years under the governance of The Northwest Atlantic Fisheries Organisation (NAFO) that regulates fisheries in the Northwest Atlantic. This workshop was the first step to achieve greater agreement in the estimation of age from calcified pieces between the scientific experts from those 2 countries. The goal of this project is to realize a calibration of the estimation of ages from cod (Gadus morhua) between France and Canada in order to optimize the precision of the data supplied by those countries for stock assessment purposes. There has been in the past an internal workshop for Atlantic Canada in 1997 on ageing fish and numerous workshops for Northeast Atlantic, more precisely for the...
Tipo: Text
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00115/22669/20396.pdf

Red mullet (Mullus surmuletus) and striped red mullet (M. barbatus) otolith and scale exchange 2011
Provedor de dados: 5
Autores: 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
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00063/17435/14941.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

Age, growth and mortality of the starry weever Trachinus radiatus Cuvier, 1829 in the Tunisian waters
Provedor de dados: 5
Autores: Hamed, Oussama; Dufour, Jean-louis; Chakroun-marzouk, Nadia; Mahe, Kelig.
Age, growth and mortality of the Starry weever Trachinus radiatus were studied for the first time from 214 individuals collected in the Gulf of Tunis between February 2014 and January 2016. The significant relationship between length-weight was observed for males (a = 0.011, b = 2.992, R2 = 0.981, n = 77) and females (a = 0.010, b = 3.036, R² =0.957, n = 109). Age was estimated by the observation of otoliths transverse thin sections. Age of individuals ranged from 1 to 15 years. The precision was measured by two age estimations from two experts and indicated a good agreement between them (PA = 85.6%, CV = 3.8% and IAPE = 4.1%). The growth parameters of the von Bertalanffy model were TL∞ = 38.41 cm, W∞ = 507.47 g, K = 0.3396 year-1, t0 = 0 year for males...
Tipo: Text
Palavras-chave: Growth; Age; Mortality; Trachinus radiatus; Starry weever; Gulf of Tunis; South-Central Mediterranean Sea.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00477/58905/61467.pdf