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Registros recuperados: 19
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Approche quantitative de la fonction de nourricerie jouée par les systèmes vasières-estuaires ArchiMer
Parlier, Emmanuel.
Coastal fish populations settle more or less frequently, at various stages, estuarine systems. Tidal marshes are one of the components of these mosaics of habitats. The first part of this work describes fish assemblages through the utilisation of these systems by fishes analysed in order to propose a revised functional classification of ecological guilds. T h i s new classification is used to compare fish communities of four estuarine systems in the western coast of France: the Mont Saint- Michel Bay, the Saint-Brieuc Bay, the Loire estuary and the Aiguillon Bay. The second part aims at characterizing the nursery function as defined by Beck et al. (2001). Acombinative approach based on gut content analysis, and stable isotope analysis shows that Yo Y s e a...
Tipo: Text Palavras-chave: Isotope ratio; Otolith; Saltmarsh; Nursery; Mont Saint Michel Bay; Saint Brieuc Bay; Aiguillon Bay; Seine estuary; Loire estuary; NEA; Dicentrarchus labrax; Fish communities; Rapports isotopiques; Otolithe; Marais salés; Nourricerie; Baie du Mont Saint Michel; Baie de Saint Brieuc; Baie de l'Aiguillon; Seine; Loire; ANE; Dicentrarchus labrax; Peuplement de poissons.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/these-4601.pdf
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Caractérisation du comportement chimique du complexe otosac-otolithe et réaction à des perturbations induites. ArchiMer
Edeyer, Anaick.
Teleost fish have the capacity to record in their otoliths, calcareous concretions located in the inner ear, the principal events (environmental and physiological) which punctuate their life. Otolith is made of CaC03 deposits on a protein matrix according to a circadian rhythm. Due to the quasi irreversibility of this process, otoliths can be compared to biological archives largely used to apprehend the fish ecology. The otolith bathes in the endolymph, a medium in which all the precursors of otolith formation forward. The endolymph chemical analysis revealed a heterogeneity of its principal components (proteins, total C02 and total Ca) which origin lies in the non uniform spatial distribution of the ionocytes in the saccular epithelium. Thus, in...
Tipo: Text Palavras-chave: Environmental disturbances; Microchemistry; Biomineralisation; Psetta maxima; Fish; Calcification; Endolymph; Otolith; Perturbations environnementales; Microchimie; Biominéralisation; Psetta maxima; Poisson; Calcification; Endolymphe; Otolithe.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/rapport-1123.pdf
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Compréhension des mécanismes de Biominéralisation de l'otolithe : quantification spatialisée des fractions minérale et organique et influence des facteurs environnementaux ArchiMer
Jolivet, Aurelie.
Despite numerous applications on the use of otoliths at both population and individual levels, knowledge regarding the mechanisms of the otolith and their variations with environmental and physiological factors has to be improved. In particular, the characterization of mineral and organic fractions of the otolith structures and the influence of their qualitative and quantitative composition on the opacity remain poorly documented. Yet this information is of key interest for the calibration of the archive "otolith" allowing a robust analysis of information. The first issue of this study focused on the analysis of the opacity and the effects of temperature, growth and metabolism through experiments in controlled conditions. Results led to the modelling of...
Tipo: Text Palavras-chave: Merluccius merluccius; Otolithe; Microstructures; Macrostructures; Opacité; Spectrométrie RAMAN; Merluccius merluccius; Otolith; Microstructures; Macrostructures; Opacity; RAMAN Spectrométry.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00035/14649/11937.pdf
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Frequency demodulation on otolith numerical images for the automation of fish age estimation ArchiMer
Troadec, Herve.
A method to assist the reading of calcified structures with digital images is proposed. An a priori growth pattern is introduced in the image processing to take into account both the variability of the ring size and the non-linearity of their growth. The introduction of biological knowledge is performed within a demodulation processing using the reciprocal growth function. The ring number is estimated by spectral analysis. The constraints introduced by the growth model are weak since they are restricted to the definition of L0, in the case of an exponential model, or of L∞ in the case of a Von Bertalanffy model. When applied to larval Dover sole otoliths (Solea solea) results close to the expert's are obtained. In the case of saithe otoliths (Pollachius...
Tipo: Text Palavras-chave: Otolithe; Image numérique; Âge; Croissance; Solea solea / Pollachius virens; Otolith; Digital image; Age; Growth; Solea solea / Pollachius virens.
Ano: 1991 URL: http://archimer.ifremer.fr/doc/00189/30072/28560.pdf
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Influence des variations des facteurs environnementaux sur la croissance de poissons de l'Atlantique ArchiMer
Barrios, Alexander.
The impact of biotic factors such as density-dependent processes, recruitment, total mortality, and abiotic factors such as upwelling intensity, temperature and chlorophyll a concentration on the variation of growth parameters of pelagic and demersal fish were studied during the periods 1990 - 2008 (pelagic) and 1971 - 2015 (demersal). Life history parameters vary according to the species and from one region to another and over time within a given area because of their plasticity and the high fishing pressure. Interspecies and inter-regional comparison were carried out. Non-linear mixed effects models were used on different fish species of the Atlantic Ocean in order to estimate the growth parameters at the individual and population levels. Variations in...
Tipo: Text Palavras-chave: Croissance; Gadidés; Clupéidés; Atlantique; Otolithe; Modèle de von Bertalanffy; Modèles à effets mixtes.; Growth; Gadides; Clupeids; Atlantic; Otolith; Von Bertalanffy growth model; Mixed effects models..
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00419/53026/53960.pdf
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Larval history of glass eels, Anguilla anguilla, (Linne, 1758) in migration in coastal and estuarine areas (Adour, Bay of Biscay) as revealed by otolith structure. ArchiMer
De Casamajor, Marie-noelle; Lecomte Finiger, Raymonde; Prouzet, Patrick.
The embryonic past of glass eels vas studied from the interpretation of microstructures registered on otoliths. The aim of this work is to put in evidence possible seasonal modifications of the growth of otoliths so that differences between otoliths of glass eels caught off marine and estuarine environment. So during the season 1999-2000, from November till March, otolith sampling was realised in the Southwestern part of France, in an estuarine and coastal zone. We observed a spatial and temporal evolution of proportions of the three various types of otoliths taken into account. Glass eels sampled at sea sometimes have a mark on their otoliths indicating the transition in the estuary, especially at the end of the fishing season. Measures of growth marks of...
Tipo: Text Palavras-chave: Migration; Larval past; Golf of Biscay; Glass eels; Otolith; Migration; Passé larvaire; Golfe de Gascogne; Civelle; Otolithe.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/publication-664.pdf
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Le merlu du golfe de Gascogne et de la mer Celtique : Croissance, Répartition spatiale et bathymétrique, Ecologie alimentaire et Assemblages ArchiMer
Kacher, Mohamed.
In the Bay of Biscay and Celtic Sea waters, hake is considered as genetically homogeneous and form a unique stock with identical meristic characteristics. The vertebral mean vary from 50,68 (vertebrae) during the first year of life to 51,11 (vertebrae) for adults. 0-group Merluccius display a rapid growth with significant interannual variability (0.71 mm.day-1 in 2001 versus 0.74 mm.day-1 in 2002). The spawning period occurs in April and the average length on the firth January following the hatching is of 17.3 cm (first seasonal check / increment on the sagittal otolith is located about 0.143 cm from the nucleus). At the end of the first year of life the average length is about 24 cm. The longevity of the species is important and growth parameters (L =...
Tipo: Text Palavras-chave: Celtic sea; Bay of biscay; Ecologie; Juvéniles; Otolith; Growth; Assemblages; Hake; Mer celtique; Golfe de Gascogne; Ecologie; Juvéniles; Otolithe; Croissance; Assemblages; Merlu.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/these-1247.pdf
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Modélisation biophysique pour la prévision du recrutement ArchiMer
Allain, Gwenhael.
Exploited fish populations are dependent on recruitment (i.e. size of the new year class) to sustain their abundance. Recruitment variations are related to hydroclimatic variations and may accentuate the detrimental effects of fishing. Recruitment prediction requires accurate fisheries oceanographic tools, which are expected to be more reliable than large-scale correlation analyses between fish abundance and climate variables. Recruitment is the result of the integration over a season and large oceanic areas of processes affecting larval survival, which are dependent on small-scale mechanisms. Hydrodynamic models are a tool to perform this integration. This thesis aims at exploring and modelling physical-biological interaction mechanisms in order to...
Tipo: Text Palavras-chave: Anchovy; Upwelling; Turbulence; Retention; Fisheries management; Population dynamics; Stock environment interaction; Stock recruitment relation; Scale integration; Individual based models; Survival; Growth; Otolith; Physical biological interactions; Prediction; Recruitment; Turbulence; Rétention; Méso échelle; Intégration des échelles; Modèle de survie; Modèle de ponte; Modèles individu centrés; Modèles de corrélation; Modèles stochastiques; Juvéniles; Larves; Otolithe; Modèle de croissance; Interactions physique biologie; Prévision; Recrutement.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/these-5.pdf
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OTOLITHE –ESPADON : Evaluation de la structure du stock d’espadon de l’océan indien à partir des analyses de forme des otolithes ArchiMer
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
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Otoliths imprinting of sole (Solea solea) from the Bay of Biscay: a tool to discriminate individuals from nursery origins? ArchiMer
De Pontual, Helene; Lagardere, Francoise; Troadec, Herve; Batel, Alain; Desaunay, Yves; Koutsikopoulos, Constantin.
Sole nurseries are located in the main bays and estuaries of the Bay of Biscay, where juveniles from the same stock. concentrate and constitute temporarily isolated groups. This context being favourable for elemental analyses of juvenile otoliths this study has been initiated with the aim of obtaining environmental imprints of the main nurseries of origin of juveniles recruiting to the adult stock, and of evaluating the relative contribution of these nurseries to the stock. The objectives were to compare (i) the otolith elemental imprints obtained by sampling juveniles in the Loire and the Gironde nurseries, and (ii) two multi-element analysis techniques: laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) and solution-based ICPMS...
Tipo: Text Palavras-chave: Recruitment; Juvenile; Estuarine nursery; ICPMS; Trace elements; Otolith; Recrutement; Juvénile; Nourricerie estuarienne; ICPMS; Eléments traces; Otolithe.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/publication-537.pdf
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Recherche des marqueurs d'exposition aux contaminants et de fréquentation des habitats chez l'anguille Anguilla anguilla de l'estuaire de l'Adour : de la réponse moléculaire à la microchimie de l'otolithe ArchiMer
Tabouret, Helene.
In a context of decline of European eel (Anguilla anguilla L.) and search for biological markers of habitat use and quality, a multidisciplinary approach was engaged on the Adour estuary and its associated wetlands. Two axes were developed. The first axe aimed at highlighting the successive presence of the species in different ecosystems based on the otolith elemental composition. The second aimed at the evaluation of the chemical pressure underwent by eels based on the contaminant bioconcentration in soft tissues and the early molecular response to the chemical stress. With a view to the analyses of otolith elemental composition taking into account the 3D structure, the low elemental concentration in the matrix and keeping the finest spatial resolution,...
Tipo: Text Palavras-chave: Adour; Polychlorinated biphenyls; Mercury; CYP1A1; Fs LA ICP MS; Microchemistry; Otolith; Anguilla anguilla; Adour; Polychlorobiphényles; Mercure; CYP1A1; Fs LA ICP MS; Microchimie; Otolithe; Anguilla anguilla.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/these-7381.pdf
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Semi-local extraction of ring structures in images of biological hard tissues: application to the Bayesian interpretation of fish otoliths for age and growth estimation ArchiMer
Fablet, Ronan.
This paper deals with the analysis of images of biological tissue that involves ring structures, such as tree trunks, bivalve seashells, or fish otoliths, with a view to automating the acquisition of age and growth data. A bottom-up template-based scheme extracts meaningful ridge and valley curve data using growth-adapted time-frequency filtering. Age and growth estimation is then stated as the Bayesian selection of a subset of ring curves, which combines a measure of curve significativity and an a priori statistical growth model. Experiments on real samples demonstrate the efficiency of the proposed data extraction stage. Our Bayesian framework is shown to significantly outperform previous methods for the interpretation of a data set of 200 plaice...
Tipo: Text Palavras-chave: Bayesian modeling; Automated age and growth estimation; Growth ring extraction; Otolith images; Images of biological hard tissues; Approche bayésienne; Estimation automatiques de l'âge et de la croissance; Extraction automatiques des marques de croissance; Otolithe; Tissus durs.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1705.pdf
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Sensibilité des populations de poissons aux changements globaux en fonction de leurs traits d'histoire de vie étudiée par une approche empririque ArchiMer
Persohn, Cecile.
L’objectif de ce travail de thèse était d’étudier les effets des variations environnementales observées au large des côtes françaises, sur les populations d’une sélection de poissons démersaux. Pour cela, nous nous sommes focalisés sur trois conséquences possibles des variations environnementales importantes en termes de gestion des stocks : l’abondance, la distribution et la taille des individus. Il s’agissait donc d’étudier l’effet de plusieurs facteurs environnementaux, comme la température et la salinité, sur ces trois paramètres. Néanmoins, comme l’abondance, la distribution et la taille des individus peuvent aussi être affectées par des facteurs biotiques, tels que la compétition intraspécifique ou la disponibilité en nourriture (Brett, 1979 ; Swain...
Tipo: Text Palavras-chave: Impacts environnementaux; Abondance; Distribution; Taille; Densité-dépendance; Otolithe; Relation allométrique.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00044/15573/12972.pdf
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Sources de variation de la forme des otolithes: Implications pour la discrimination des stocks de poissons ArchiMer
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
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Suivi 2011 des captures d'anguilles pour la DCF : analyse des otolithes ArchiMer
Mahe, Kelig; Penil, Caroline; Sevin, Karine.
Ce rapport synthétise l'analyse des otolithes d'anguilles prélevés en 2011 dans le cadre du suivi des captures de cette espèce inscrite à la DCF (Data Collection Framework règlement CE n°199/2008 du conseil du 25 février 2008). 140 anguilles ont été prélevées entre fin juillet et fin octobre 2011 dans la Loire, la Dordogne et la Gironde. La relation entre la longueur totale (Lt) et le poids total (Wt) des anguilles prélevées en 2011 dans toute la France (Loire, Garonne et Dordogne) est du type Wt = 5.10-7.Lt3,21. Ainsi, les anguilles présentent une allométrie majorante (b=3.21) c’est-à-dire que le poids croit plus vite que la longueur. L'institut IFREMER à travers le pôle national de Sclérochronologie à Boulogne-sur-mer a préparé et interprété les...
Tipo: Text Palavras-chave: Anguille; Otolithe; Age; Dordogne; Garonne; Loire.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00310/42080/41383.pdf
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Suivi 2013 des captures d'anguilles pour la DCF : analyse des otolithes ArchiMer
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
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Suivi 2014 des captures d'anguilles pour la DCF : analyse des otolithes ArchiMer
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
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Suivi 2015 des captures d'anguilles pour la DCF : analyse des otolithes ArchiMer
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
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Synthèse française des procédures d'estimation d'âge ArchiMer
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
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