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Registros recuperados: 39
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A comparison of two techniques to discriminate continental origin of Atlantic salmon (Salmo salar L.) off West Greenland ArchiMer
Reddin, David; De Pontual, Helene; Prouzet, Patrick.
Two techniques of stock discrimination both utilizing scales, i. e. termed as classical technique and shape analysis, are compared for discriminating between North American and European Atlantic salmon (Salmo salar L.) caught off West Greenland. Three scales from each of 60 salmon were analyzed: 30 from North American and 30 from European-origin salmon collected from home rivers in 1982. The best results indicated misclassification and error rates of 0% for shape analysis and 5.0% and ± 1.7%, respectively, for the classical technique. A nested ANOVA indicated that variation was greater between scales of salmon of North American and European origin than from several scales from the same salmon. It was concluded that shape analysis with computer-aided...
Tipo: Text Palavras-chave: Salmo salar; Scalimétrie; Analyse de forme; Discrimination; Salmo salar; Meristics; Shape analysis; Discrimination.
Ano: 1992 URL: http://archimer.ifremer.fr/doc/00189/30073/28561.pdf
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Actes du colloque : Des activités du Grand Littoral Atlantique à l'Observatoire des pêches et des cultures marines du golfe de Gascogne ArchiMer
Caill, Nathalie; Prouzet, Patrick; Cuende, François-xavier; Milly, David; Pautrizel, Françoise.
Tipo: Text
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00105/21606/19186.pdf
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Analysis and visualization of the glass eel behavior (Anguilla anguilla) in the Adour estuary and estimate of its upstream migration speed ArchiMer
Prouzet, Patrick; Odunlami, Marc; Duquesne, Elise; Boussouar, Ahmed.
The studies carried out on the Adour estuary on the migration of glass eels lead to the characterisation of their swimming behavior. Individuals migrate passively with the flood tide current behind the dynamic tide front, and their movements into the water column are linked to the surrounding luminosity and water turbidity. A numerical model was built from observations gathered on glass eel densities during scientific surveys. It uses the outputs of a hydrodynamic model accounting for the variations in the river flow and tide coefficient. It allows the simulation of the displacement of a particle in the longitudinal axis of the estuary. The variation of the vertical movements through the water column takes into account the cloud cover, the moon phases, the...
Tipo: Text Palavras-chave: Numerical modeling; Fish behavior; Migration; Estuary; Hydrodynamics; Exploitation rate; Glass eel; Anguilla anguilla; Atlantic Ocean.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00000/11171/7531.pdf
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Caractérisation biologique et variation des captures de la grande alose (Alosa alosa) par unité d'effort sur le fleuve Adour (Pyrénées Atlantiques, France) ArchiMer
Prouzet, Patrick; Martinet, Jean-pierre; Badia, Jacques.
The study of logbooks from commercial fishermen on the Adour River and commercial samples allowed characterization of the allis shad population (Alosa alosa L.) caught during the period 1988-91. A better knowledge of the influence of hydroclimatic factors (rate of river flow and intensity of tidal coefficient) on the catchability of the species in that never was also obtained. Allis shad are mainly recruited to this fishery from the beginning of April to the end of May: between 78 and 89 % depending on year. Males in the population were on average younger than females. However, at the same age, males were significantly smaller in size and in weight than females. These results reinforce the knowledge already obtained on French stocks in the Loire and...
Tipo: Text Palavras-chave: Alosa alosa; Grande alose ou alose vraie; Clupéidés; Captures; Stock; Pêche; Âge; Débit fluvial; Courant de marée; Atlantique; Alosa alosa; Allis shad; Clupeidae; Catch; Fishing effort; Stock assessment; Age composition; Flow and tidal currents; Atlantic.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00188/29891/28336.pdf
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Caracteristiques du stock de saumon atlantique (Salmo salar L.) capture a la ligne sur l'Aulne (riviere de Bretagne nord) durant la periode 1983-1981. ArchiMer
Prouzet, Patrick.
Study of fish caught by angling on the Aulne River from 1973 to 1981provides information on the characteristics of Atlantic salmon (Salmo salar) populations and on the characteristics of the fishery. A discontinuity was noted in 1973 in the catch evolution that separates two periods: 1955-1972 (630 salmons each year) and 1973-1981 (161 salmons each years).
Tipo: Text Palavras-chave: Salmo salar; Stock assessment; Angling; Salmon fisheries; Migratory species.
Ano: 1982 URL: http://archimer.ifremer.fr/doc/1982/publication-1840.pdf
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Characteristics of one sea winter Atlantic salmon stock caught on Elorn river from 1974 to 1984 ArchiMer
Prouzet, Patrick; Gaignon, Jean-louis.
From observations gathered on grilse populations sampled during the fishing period (March -mid-June) or after the fishing season, the authors noted: a strong heterogeneity and length, the mean value of which increase from May to December, a sex-ratio not different from 1 male for 1 female, a high relative fecundity superior to those of spring salmon population sampled. The comparison between fish of local and foreign origins did not allow to observe significant differences between the biological characteristics studied (weight, length, sex-ratio and fecundity).
Tipo: Text Palavras-chave: Salmo salar; Salmonidae; Pisces; Weight; Fecundity; Sex ratio; Length weight relationships; Migratory species.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/publication-1818.pdf
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Daily and seasonal estimates of the recruitment and biomass of glass eels runs (Anguilla anguilla) and exploitation rates in the Adour open estuary (Southwestern France) ArchiMer
Bru, Noelle; Prouzet, Patrick; Lejeune, Michel.
The European eel (Anguilla anguilla) is drastically declining in all its distribution area and listed in the red list of the IUCN (International Union for Conservation of Nature). A rebuilding plan was adopted at European level in 2007, Regulation R(CE) 100/2007, to restore eel abundance to the level observed during the seventies. Its implementation started on the 1(st) of January 2009. This species is heavily threatened by numerous activities including fishing, and its management can only be effective through a systemic approach minimizing the whole range of human-induced impacts on the resource and its habitat. In the framework of the European interregional programme INTERREG IIIB-Atlantic Area-the INDICANG project aimed at elaborating abundance...
Tipo: Text Palavras-chave: Biomass estimates; Exploitation rate; Time series; River; Glass eel; Anguilla anguilla.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00000/11170/7526.pdf
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Etude de la production de juvéniles de saumon atlantique (Salmo salar) - 1 - Résultats de la saison 1979-1980 Pisciculture du Quinquis ArchiMer
Gaignon, Jean-louis; Prouzet, Patrick.
La pisciculture du Quinquis, sise près de Landivisiau (29), a pour objet la production intensive de smolts de saumon atlantique (Salmo salar) dans le cadre d'un programme d'aménagement et de repeuplement de la rivière Elorn. Depuis sa mise en eau (1976) les résultats ont été décevants et ceci à cause, d'une part de difficultés de démarrage (problèmes alimentaires en autres), d'autre part de problèmes sanitaires : la furonculose ayant entrainé des mortalités importantes dès le 1er automne (alevins à bonne croissance) ou en fin d'hiver. Au total, la survie a toujours été très faible et la production de smolts négligeable. C'est pourquoi, à partir de la saison 79-80, les objectifs ont été tournés davantage vers l'expérimentation tout en conservant un objectif...
Tipo: Text Palavras-chave: Saumon atlantique; Salmo salar; Elevage; Juvénile; Paramètres élevage; Données économiques; Pisciculture.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/00083/19420/17031.pdf
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Etude de la production de juvéniles de saumon atlantique (Salmo salar). II - Influence de la densité sur l'alevinage. Campagne 1980-1981 Pisciculture du Quinquis ArchiMer
Gaignon, Jean-louis; Prouzet, Patrick.
Les résultats de la campagne 1979-1980 ont montré la nécessité d'améliorer les performances de l'alevinage pour obtenir des résultats de production intéressants en cycle ouvert dans les conditions bretonnes. En effet, une augmentation du taux de smoltification à un an ne semble pouvoir être obtenue dans des conditions économiquement intéressantes (Charge très supérieure à 2 kg/m2), qu'à condition que la taille des tacons soit au moins égale à 6-7 cm en septembre de la première année. En conséquence, l'objectif expérimental de la saison 1980-1981 est de déterminer les conditions d'élevage qui puissent permettre d'obtenir un population homogène ayant une bonne croissance c'est-à-dire très supérieure à celle obtenue en 79-80....
Tipo: Text Palavras-chave: Aquaculture; Pisciculture; Production; Juvéniles; Salmo salar; Densité.
Ano: 1981 URL: http://archimer.ifremer.fr/doc/00143/25381/23519.pdf
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Evaluation de la biomasse d'anchois (Engraulis encrasicolus) dans le golfe de Gascogne en 1994 - Campagne BIOMAN 94 ArchiMer
Motos, L.; Metuzals, K.; Uriarte, A.; Prouzet, Patrick.
De 1989 à 1992 dans le cadre d'un programme FAR financé en partie par l’Union Européenne, l'Institut Technique des Pêches et de l'Alimentation (AZTI), de San Sébastien, l'Institut Français de Recherchi: pour l'Exploitation de la Mer (IFREMER) et l'institut Espagnol d'océanographie (IEO), de Santander ont étudié l'abondance et les caractéristiques de la population d'anchois du golfe de Gascogne. Les résultats obtenus ont permis de montrer la répartition et le comportement de cette ressource, mais également la grande variabilité de son abondance qui a fluctué durant cette période d'étude entre 15 000 tonnes environ en 1989 et 100 000 tonnes en 1990. Cette évaluation, faute de moyens, a été arrêtée en 1993. Face a l'importance grandissante de cette ressource...
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Ano: 1995 URL: http://archimer.ifremer.fr/doc/00305/41576/40785.pdf
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Fécondité des saumons de plusieurs hivers de la Nive ArchiMer
Prouzet, Patrick; Martinet, J. P..
1. Captures des géniteurs Les saumons ont été capturés sur la Nive au barrage de Chopolo situé sur le cours inférieur à proximité de la localité d'Ustaritz (figure 1). Cette opération a été réalisée à l’aide d’une trappe de capture aménagée dans le bassin supérieur de la passe à ralentisseurs. En tout 20 géniteurs ont été capturés sous la responsabilité du CSP et de l'INRA durant la période d'autorisation de capture du 10 mai au 31 juillet 1988. Sur ces 20 saumons, on comptait 19 femelles pour un mâle. Une des femelles était marquée et provenait d'un repeuplement effectué sur la Nivelle par l'INRA. Elle a été de ce fait écartée du lot.
Tipo: Text
Ano: 1989 URL: http://archimer.ifremer.fr/doc/00068/17940/15475.pdf
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Fluctuations des captures de civelles (Anguilla Anguilla L.) et analyse de la variation de leur capturabilité dans l'estuaire de l'Adour ArchiMer
De Casamajor, Marie-noelle; Bru, N.; Prouzet, Patrick.
Analysis of glass eels catches from 1927 to 1998 in the Adour estuary showed different periods of successive decrease. Fishing periods between 1985 to 1993 were studied iwn order to observe impact of hydroclimatic conditions on the level of catch per unit of effort. This study took place in January when glass eels accessibility by the fishery was generally the highest. With hand and trawl netting that filtered the upper part of the water column, only individuals located close to the surface were accessible. Consequently, factors acting on the migration of glass eels in the water column have a great importance on the fishing success. Among environmental conditions, moon phase and temperature influence were determinant factors on catch variability but a lack...
Tipo: Text Palavras-chave: Capturabilité; Civelle; Estuaire de l'Adour; Phase lunaire; Catchability; Glass eels; Migratory behaviour; Adour estuary.
Ano: 2001 URL: https://archimer.ifremer.fr/doc/00480/59145/61773.pdf
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Heavy metals and organochlorinated compounds in the European eel (Anguilla anguilla) from the Adour estuary and associated wetlands (France) ArchiMer
Tabouret, H.; Bareille, G.; Mestrot, A.; Caill-milly, Nathalie; Budzinski, H.; Peluhet, L.; Prouzet, Patrick; Donard, O. F. X..
Heavy metals and organic pollutants were investigated in the Adour estuary (South West France) and associated wetlands using the European eel (Anguilla anguilla) as a bioindicator. Heavy metals (Cu, Cd, Zn, Pb, and Ag) were measured in soft tissue of yellow eels. Mercury (total Hg and MeHg) and organochlorinated compounds (7 PCBs, 11 OCPs) were analysed in muscle. Concentrations in muscle were in agreement with moderately contaminated environments in Europe and were below the norms fixed for eel consumption for heavy metals and OCPs. Analyses of liver showed a higher pressure of Ag and Zn in the downstream estuary than in the freshwater sites whereas Cd was lower in the estuary probably because of the salinity influence. According to quality classes 100%...
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00036/14677/11987.pdf
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Identification des flux de civelles (Anguilla anguilla) à partir des relations d’allométrie en fonction des conditions hydrodynamiques de l’estuaire de l’Adour ArchiMer
De Casamajor, Marie-noelle; Prouzet, Patrick; Lazure, Pascal.
Biological data on glass eels (Anguilla anguilla) were collected during two successive sampling periods from November to March (1996-1997 and 1997-1998) on the Adour estuary. As for other estuaries, decrease in length (mean of 73.5 to 67.4 mm) and weight (mean of 3.5 to 2.6 dg) of glass eels were observed. Weight and length characteristics were used to identify groups of glass eels. These groups were well distinguished during the first sampling period but some overlaps appeared in the second one. Fluctuations of static allometry and similarity coefficients showed successive glass eels arrivals in the lower part of the estuary during the two seasons. We used fluctuations of the index of similarity in the second period to describe arrivals of glass-eels...
Tipo: Text Palavras-chave: Biométrie; Modèle hydrodynamique; Flux migratoires; Civelle; Estuaire de l’Adour; Biometry; Hydrodynamic model; Migratory flow; Glass-eels; Adour estuary.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00188/29897/28346.pdf
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Impact des facteurs anthropiques et naturels sur le fonctionnement de quelques populations halieutiques ArchiMer
Prouzet, Patrick.
Researcher since 1974 at CNEXO (National Centre for Exploration of the Oceans), then at IFREMER (French Institute for Exploitation of the Sea), I have at the same time brought to the work of researching the dynamics of exploited ichthyologic populations actions for enhanced improvement and transfer of knowledge to help managers and stakeholders administer these resources and restore them if needed. This activity led me to play a double role: that of the expert who is asked to set up "a truth judgment" on a given subject or according to a specific question, and that of the scientist faced with the judgment of his peers who strives not to go against his knowledge (i.e., that which is subject to the criticism of the scientific community). This change of...
Tipo: Text Palavras-chave: Ecosystem; Ichthyology; Populations dynamics; Halieutics.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/rapport-2167.pdf
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La détermination de l'âge par scalimétrie chez le saumon atlantique (Salmo salar) dans son aire de répartition méridionale : utilisation pratique et difficultés de la méthode ArchiMer
Baglinière, J. L.; Bomassi, P.; Bousquet, B.; Chancerel, F.; De Pontual, Helene; Dumas, J.; Euzenat, G.; Fontenelle, G.; Fournel, F.; Gayou, F.; Luquet, J. F.; Maisse, G.; Martin Ventura, J. A.; Marty, A.; Nihouarn, A.; Porcher, J. P.; Prevost, E.; Prouzet, Patrick; Pustelnik, G.; Richard, A.; Troadec, Herve.
This report confirms interpretation criteria used in scale reading for age determination of Atlantic Salmon in freshwater and in sea water with typical examples. The difficulties for age determination of wild and reared populations by showing atypical examples are presented. Finally some recommandations to a better knowledge of Atlantic salmon population in south distribution area are proposed.
Tipo: Text
Ano: 1985 URL: https://archimer.ifremer.fr/doc/00480/59127/61755.pdf
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La peche maritime professionnelle dans l'estuaire de l'Adour en 2000. Importance economique et caracteristiques des captures de poissons migrateurs amphihalins. ArchiMer
Prouzet, Patrick.
This technical report gives the characteristics of the estuarine professional fishing located in the lower course and at the mouth of Adour river during the fishing season 2000. The fishery statistics for all the migratory amphihaline species (excepted glass-eel) are recorded according to the calendar year. For the glass-eel landings, the statistics given are relative to the fishing season (November, 1, 1999-March, 31,2000). The 2000 fishing season is characterized by a medium level of landings around 50 metric tonnes, but a high turnover, the highest of the 1985-2000 series: 1.47 Meuros. An evaluation of the state of the main exploited species is given: Atlantic Salmon, Sea Trout, Allis Shad, Sea Lamprey and Eel (glass-eel and yellow eel). The catch...
Tipo: Text Palavras-chave: Caractéristiques des captures et évolution des stocks; Anguille; Civelle; Lamproie marine; Grande alose; Truite de mer; Saumon atlantique; Espèce amphihaline; Statistique de pêche; Pêche professionnelle estuarienne; Catch characteristics and stock evolution; Yellow eel; Glass eels; Sea lamprey; Allis shad; Sea trout; Atlantic Salmon; Professional esturian fishing; Fish statistic; Amphihaline species.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/rapport-1577.pdf
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La petite pêche en Aquitaine - le bassin d'Arcachon - Halieutique, socio-économie, usages et réglementations. 1999-2000 ArchiMer
Caill-milly, Nathalie; Leaute, Jean-pierre; Trouillet, Brice; Laborde, Jean-louis; Goumy, Cécilia; Prouzet, Patrick; Grandpierre, Alde; Lissardy, Muriel; Corlay, Jean-pierre.
Introduction : Intra-basin fishing is not grasped as well, partly because of a lack of distinction between pure professional fishing units and conchological units and on the other hand because of the large amount of ships. Poorly adapted codification of the equipment found in the basin is also contributing to this lack of information. Studies on the subject do exist, but the elements necessary to publish notices are not always gathered, this is leading to the proposal of a geographical systemic analysis on the basin. The steps that are being taken are complementing the development of the Geographical Information System already in place in the basin since 1993 through DEL at the Arcachon Ifremer as well as the PECOSUDE European study ¿ caractéristiques des...
Tipo: Text Palavras-chave: Uses; Regulation; Economy; Halieutics; Basin of Arcachon; Fishing; Usages; Réglementation; Economie; Halieutique; Bassin d'Arcachon; Pêche.
Ano: 2001 URL: https://archimer.ifremer.fr/doc/2001/rapport-1660.pdf
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L'aménagement et la gestion des stocks de saumon Atlantique dans les provinces maritimes canadiennes ArchiMer
Prouzet, Patrick.
Les Maritimes regroupent quatre provinces Canadiennes : Terre Neuve, la Nouvelle Ecosse, le Nouveau Brunswick et l'Ile du Prince Edouard. La superficie des Maritimes est de 539 000 km2, soit 5% de la superficie totale du pays. Au cours de ce voyage, deux provinces des l\tlaritimes ont été visitées le Nouveau Brunswick et la Nouvelle Ecosse. Le Nouveau Brunswick (superficie 73 405 km2) possède un climat tempéré à proximité de la Baie de Fundy, mais il devient nettement continental à l'intérieur de la province. Les précipitations sont abondantes et constantes (1 041 mm en moyenne/an). Une des principales production du Nouveau Brunswick provient de la fabrication de produits manufacturés. La Nouvelle Ecosse (superficie : 55 460 km2) possède un climat...
Tipo: Text
Ano: 1983 URL: http://archimer.ifremer.fr/doc/00153/26469/24574.pdf
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L'anchois du golfe de Gascogne - Généralités et campagne de pêche en 1993 ArchiMer
Prouzet, Patrick; Metuzals, K.
The anchovy, Engraulis encrasicolus L. population in the Bay of Biscay, is described in context with other Engraulidae populations in the world. Mean landings are provided for six different species from 1974 to 1992. The great variations in the abundance (up to 200 %) of these populations, in relation to upwelling and environmental parameters are also discussed. Historical changes in the French and Spanish fleet fishing for anchovy are highlighted since 1950. The main events in the development of these fisheries are detailed. The total number ofboats in the French fleet have increased from 1987-1993 whereas the number of seiners in the Spanish fleet in that peri ad remained stable since 1980. The third part of this report describes the French fishery for...
Tipo: Text Palavras-chave: Anchois; Engraulis encrasicolus; Distribution géographique; Biologie; Pêcheries; Golfe de Gascogne; Anchovy; Engraulis encrasicolus; Geographic distribution; Biology; Fisheries; Gulf of Biscay.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00305/41644/40853.pdf
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