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Registros recuperados: 71
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A study of the stability of some stocks described by self-regenerating stochastic models IRD
Laurec, A.; Fonteneau, Alain; Champagnat, Christian.
Tipo: Text Palavras-chave: POISSON MARIN; ESPECE PELAGIQUE; DYNAMIQUE DE POPULATION; MODELE; GESTION DE STOCK; MORTALITE; MODELE STOCHASTIQUE.
Ano: 1980 URL: http://www.documentation.ird.fr/hor/fdi:010023146
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A worldwide review of purse seine fisheries on FADs ArchiMer
Fonteneau, Alain; Pallares, P; Pianet, Renaud.
This paper develops a comparative overview of the development of Fish Aggregating Devices (or fads) by the tropical purse seine fisheries in various ocean areas (Atlantic, Indian, Western and Eastern Pacific Oceans). First, a comparative review of fishery statistics is developed. Recent catches on fads by purse seiners can be estimated at a level of one million tons yearly. This comparison allows to describe the fishing zones and catch trends over time, the species composition and size taken in the various fad fisheries. Skipjack tuna is the dominant species in most fad fisheries, but significant amounts of yellowfin and bigeye are also frequently taken under fads. The paper also presents an overview of various observer data concerning the by-catches of...
Tipo: Text Palavras-chave: Attracting techniques Fisheries Purse seines Size Tuna fisheries Article Geographic Terms: A; Atlantic I; Pacific ISW; Indian Ocean.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00042/15278/12664.pdf
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An efficient way of bait-fishing for tunas recently developed in Senegal IRD
Fonteneau, Alain; Diouf, T..
Une nouvelle méthode de pêche a été développée durant les douze premières annnées par les thoniers canneurs opérant dans la zone du Sénégal (Afrique de l'Ouest, 12 à 21°N). Trois espèces de thons, l'albacore, le listao et le patudo sont capturés en proportions voisines par cette flotille. Cette méthode a considérablement amélioré les rendements des canneurs. L'article décrit ce nouveau mode de pêche dans lequel les bateaux sont associés étroitement avec un banc de thon sur une base permanente, nuit et jour, pendant plusieurs mois. Une équipe de pêche constituée par un groupe de deux bateaux se relaie pour exploiter le banc. Les caractéristiques biologiques et de l'environnement liées à ce mode de pêche sont examinées à partir des données des livres de...
Tipo: Text Palavras-chave: THON; TECHNIQUE DE PECHE; NAVIRE DE PECHE; CANNEUR; RENDEMENT; EFFORT DE PECHE; RELATION PECHE ENVIRONNEMENT; BANC.
Ano: 1994 URL: http://www.documentation.ird.fr/hor/fdi:39900
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An overview on the use of precautionary approach and tuna management ArchiMer
Fonteneau, Alain; Fromentin, Jean-marc.
This paper develops a critical overview of the various problems and uncertainties faced in tuna stock assessment, management and conservation. This presentation is based on Atlantic tunas, but also on various tuna stocks worldwide. Tuna jisheries management is characterized by major uncertainties in the stock assessment; since these stock assessments are always done only on jishery data which are often biased. Fortunately most tuna stocks are showing a strong resistance to overfishing. These major characteristics of tuna stocks and jisheries, and the bias in the scientific analysis, are presented and discussed. As a result, many of the reference point recommended for the precautionary approach applied to jisheries are often quite inappropriate for tuna...
Tipo: Text Palavras-chave: Tunas; Precautionay approach; Atlantic; Management; Assessment.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00194/30564/28984.pdf
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Analyse de la situation de la pêcherie d'albacore de l'Atlantique de l'Est IRD
Fonteneau, Alain; Pianet, Renaud.
Tipo: Text Palavras-chave: POISSON MARIN; PECHE; EFFORT DE PECHE; ANALYSE STATISTIQUE; MODELE DE PRODUCTION; MODELE DE SIMULATION; THUNNUS ALBACARES.
Ano: 1976 URL: http://www.documentation.ird.fr/hor/fdi:19716
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Analyse de l'effort de pêche des thoniers senneurs franco-ivoiro-sénégalais IRD
Fonteneau, Alain.
Tipo: Text Palavras-chave: THONIER; SENNEUR; EFFORT DE PECHE; RENDEMENT PONDERAL; PRISE PAR UNITE D'EFFORT; FLOTILLE FIS; SURESTIMATION DE STOCK; THUNNUS ALBACORES; KATSUWONUS PELAMIS; 197707 197709.
Ano: 1978 URL: http://www.documentation.ird.fr/hor/fdi:19771
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Analyse de l'état des stocks d'Albacore (Thunnus albacares) de l'Atlantique de l'Est IRD
Fonteneau, Alain; Marcille, Jacques.
Tipo: Text Palavras-chave: THON; ESTIMATION DE STOCK; ANALYSE STATISTIQUE; RENDEMENT; EFFORT DE PECHE; RECRUTEMENT; ALBACORE.
Ano: 1977 URL: http://www.documentation.ird.fr/hor/fdi:010022966
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Analyse de l'état des stocks d'Albacore (Thunnus albacares) et de listao (Katsuwonus pelamys) de l'Atlantique Est au 30 septembre 1979 IRD
Fonteneau, Alain; Cayré, Patrice.
Tipo: Text Palavras-chave: PECHE THONIERE; SENNEUR; THON; ESTIMATION DE STOCK; DONNEES STATISTIQUES; EFFORT DE PECHE; CAPTURE; PRISE PAR UNITE D'EFFORT; FLOTILLE; ALBACORE; LISTAO; TAILLE.
Ano: 1979 URL: http://www.documentation.ird.fr/hor/fdi:010022970
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Analyse de l'évolution des puissances de pêche par l'analyse des corhortes : application aux senneurs exploitant l'albacore (Thunnus albacares) dans l'Atlantique est IRD
Gascuel, D.; Fonteneau, Alain; Foucher, Eric.
Une méthode d'ajustement de l'analyse des cohortes, combinant calcul en mode inverse et calcul en mode direct, est présentée; elle permet d'analyser l'évolution des puissances de pêche par flottille et par âge, à partir de la matrice des capturabilités nominales. La méthode est appliquée aux deux principales flottilles exploitant l'albacore dans l'Atlantique Est, entre 1980 et 1990 : les senneurs franco-ivoiro-sénégalais (FIS) et les senneurs espagnols. A l'aide d'un modèle linéaire généralisé, les puissances de pêche globales sont décomposées en deux termes : puissances locales et efficiences globales. Les évolutions tendancielles des trois grandeurs, puissances globales, puissances locales et efficiences globales, par catégorie d'âge ou en moyennes, sont...
Tipo: Text Palavras-chave: PUISSANCE DE PECHE; PECHE THONIERE; SENNEUR; ANALYSE STATISTIQUE; APPLICATION; ALBACORE; ANALYSE DES COHORTES; EVOLUTION DES PECHERIES.
Ano: 1993 URL: http://www.documentation.ird.fr/hor/fdi:37890
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Analyse des rendements des chalutiers ivoiriens : définition d'un effort de pêche IRD
Fonteneau, Alain; Bouillon, Pierre.
Tipo: Text Palavras-chave: CHALUTIER; RENDEMENT; EFFORT DE PECHE; PUISSANCE DE PECHE; CORRELATION STATISTIQUE; ZONE DE PECHE.
Ano: 1971 URL: http://www.documentation.ird.fr/hor/fdi:32161
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Atlas des pêcheries thonières tropicales : captures mondiales et environnement = Atlas of tropical tuna fisheries : world catches and environment IRD
Fonteneau, Alain; Joseph, J. (pref.).
Tipo: Text Palavras-chave: ATLAS; PECHE THONIERE; ZONE DE PECHE; THON; ANALYSE STATISTIQUE; REPARTITION GEOGRAPHIQUE; TEMPERATURE; OXYGENE DISSOUS; THERMOCLINE.
Ano: 1997 URL: http://www.documentation.ird.fr/hor/fdi:010012425
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Biogeography of tuna and billfish communities ArchiMer
Reygondeau, Gabriel; Maury, Olivier; Beaugrand, Gregory; Fromentin, Jean-marc; Fonteneau, Alain; Cury, Philippe.
Aim The aims of this study were: (1) to identify global communities of tuna and billfish species through quantitative statistical analyses of global fisheries data; (2) to describe the spatial distribution, main environmental drivers and species composition of each community detected; and (3) to determine whether the spatial distribution of each community could be linked to the environmental conditions that affect lower trophic levels by comparing the partitions identified in this study with Longhursts biogeochemical provinces. Location The global ocean from 60 degrees S to 65 degrees N. Methods We implemented a new numerical procedure based on a hierarchical clustering method and a nonparametric probabilistic test to divide the oceanic biosphere into...
Tipo: Text Palavras-chave: Biogeochemical provinces; Global ocean; Istiophorus; Katsuwonus; Macroecology; Makaira; Marine biogeography; Tetrapturus; Thunnus; Xiphias.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00060/17141/14716.pdf
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Biological reference points and natural long-term fluctuations: the case of eastern Atlantic bluefin tuna ArchiMer
Fromentin, Jean-marc; Fonteneau, Alain; Farrugio, Henri.
Defining biological key reference points is of importance within the precautionary approach. Most of the reference points, such as the FMSY, Fo.], presuppose a steady state, i.e. the natural long-term fluctuations of the population are low or moderate. In this manuscript, we present historical data from Sicilian, Sardinian, Portuguese, and Tunisian traps of the Atlantic bluefin tuna during 200 to 400 years. Long-term fluctuations in trap data could be considered as a good proxy for long-term trend in true abundance because trap is a passive gear which was submitted to low modification until the XX century and because data from different areas display similar long-term variations. Trends in trap data appear beIl shaped, with a maximum at the end ofthe XIXth...
Tipo: Text
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00194/30485/28890.pdf
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Biologie de Penaeus duorarum en Côte d'Ivoire : 3. Etude des variations quotidiennes des rendements et de leur relation avec l'hydroclimat, essai de généralisation au golfe de Guinée IRD
Garcia, Serge; Petit, Pierre; Fonteneau, Alain.
Tipo: Text Palavras-chave: PECHE DE CRUSTACES; CREVETTE; STOCK; RENDEMENT PONDERAL; VARIATION JOURNALIERE; RYTHME NYCTHEMERAL; HYDROCLIMAT; UPWELLING; TRANSPARENCE; RELATION PECHE ENVIRONNEMENT; CRUSTACEA; DECAPODA; PENAEIDAE; PENAEUS DUORARUM.
Ano: 1973 URL: http://www.documentation.ird.fr/hor/fdi:32197
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DCP employés par les pêcheries artisanales et industrielles : une question d'échelle. L’utilisation et le développement technique des DCP au coeur de la conférence de Tahiti sur les DCP ArchiMer
Taquet, Marc; Blanc, Michel; Dagorn, Laurent; Filmalter, John David; Fonteneau, Alain; Forget, Fabien; Gaertner, Jean-claude; Galzin, René; Gervain, Paul; Goujon, Michel; Guillotreau, Patrice; Guyader, Olivier; Hall, Martin; Holland, Kim; Itano, David; Monteagudo, Jean-pierre; Morales-nin, Beatriz; Reynal, Lionel; Sharp, Michael; Sokimi, Williams; Tanetoa, Mainui; Yen Kai Sun, Stephen.
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00115/22657/20383.pdf
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Deep diving behavior observed in yellowfin tuna (Thunnus albacares) ArchiMer
Dagorn, Laurent; Holland, Kim N.; Hallier, Jean-pierre; Taquet, Marc; Moreno, Gala; Sancho, Gorka; Itano, David; Aumeeruddy, Ryaz; Girard, Charlotte; Million, Julien; Fonteneau, Alain.
Yellowfin tuna (Thunnus albacares) are known to preferentially occupy the Surface mixed layer above the thermocline and it has been Suggested that they are physiologically restricted to water lerriperatt.11-CS no more than 8 degrees C colder than Surface waters. However, we here report for dive data acquired from a large yellowfin tuna which demonstrate for the first time that this species is indeed capable of making prolonged dives into deep cold waters. A yellowfin tuna (134 cm fork length) caught near ail anchored fish aggregating device (FAD) in the Seychelles (Western Indian Ocean) was equipped with all internally implanted archival tag and released. The fish was recaptured 98 days later. As predicted for this species, this fish spent 85% of its time...
Tipo: Text Palavras-chave: Indian ocean; Yellowfin tuna; Swimming speed; Diving behavior; Vertical movements; Archival tap.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1402.pdf
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Drifting FADs used in tuna fisheries: an ecological trap? ArchiMer
Marsac, F; Fonteneau, Alain; Menard, Frederic.
This paper discusses the hypothesis that small tunas and the various species found in association with drifting fads (such as "mahi-mahi", rainbow runner, wahoo, etc.) may be biologically trapped by such a strong association. Massive seeding of drifting artificial fads was observed worldwide during recent years. In this hypothesis, we suggest that fads may alter some biological characteristics of epipelagic populations associated with them: migration, growth, condition factors, predation and natural mortality. As fads are most often used in the equatorial currents, they tend to exhibit zonal drift. Therefore, the associated populations would be artificially transferred from one part of the ocean to another, when they would show different movement patterns...
Tipo: Text Palavras-chave: Attracting techniques Biology Conservation Fishing Migrations Purse seines Trap fishing Tuna fisheries Article Geographic Terms: A; Atlantic.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00042/15303/12636.pdf
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Dynamique du stock de tassergal sénégalo-mauritanien IRD
Champagnat, Christian; Fonteneau, Alain; Cury, Philippe.
Tipo: Text Palavras-chave: MODELE MATHEMATIQUE; PRODUCTION HALIEUTIQUE; DYNAMIQUE DE POPULATION; ESTIMATION DE STOCK; MORTALITE PAR PECHE; POISSON MARIN; TASSERGAL; POMATOMIDAE; POMATOMUS SALTATOR.
Ano: 1983 URL: http://www.documentation.ird.fr/hor/fdi:16132
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Echantillonnage de l'albacore Atlantique (Thunnus albacares) IRD
Fonteneau, Alain; Amon, J.B..
Tipo: Text Palavras-chave: POISSON MARIN; ECHANTILLONNAGE; CANNEUR; SENNEUR; ANALYSE STATISTIQUE; VARIANCE; THUNNUS ALBACARES.
Ano: 1975 URL: http://www.documentation.ird.fr/hor/fdi:19697
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Ecosystem approach to fisheries: a brief overview and some considerations for its application in ICCAT ArchiMer
Fromentin, Jean-marc; Fonteneau, Alain; Restrepo, Victor.
During the last SCRS plenary meeting, the sub-committee on environment suggested to present a document on the ‘Ecosystem Approach to Fisheries’ (EAF). This document firstly recalls the general scientific and institutional background of EAF, then we propose a synoptic view of EAF, including four main domains: governance, exploitation, resources and impacts on ecosystems. The way that EAF is tackled within the various tuna commissions is then summarised. Finally, we rapidly examine the way the SCRS could cope with EAF issues and we suggest to merge the sub-committee on environment with this on by-catch into a single subcommittee on ecosystem.
Tipo: Text Palavras-chave: Ecosystem; Resources; Exploitation; Governance; Environment; By-catch.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/00192/30334/28809.pdf
Registros recuperados: 71
Primeira ... 1234 ... Última
 

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