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Registros recuperados: 6
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Application of Leslie's model on a population of common dolphins (Delphinus delphis): Sensitivity study ArchiMer
Fifas, Spyros; Goujon, Michel; Antoine, Loic.
The rapid development of the albacore tuna (Thunnus alalunga) driftnet fishery in the Pay of Biscay (Atlantic ocean, France) has incited European management authorities to ask for a study of its ecological impact on populations of common dolphins and striped dolphins. A programme with onboard observers has been led during 1992 and 1993, and a sighting survey has allowed the evaluation of the abundances of fractions of populations in the studied area. For the population of common dolphins, the biological parameter estimation has allowed the building of a discrete age-structured model based on a Leslie matrix. Sensitivity studies have been conducted using four model parameters (age of first reproduction, interval between births, juvenile and adult survival...
Tipo: Text Palavras-chave: Survival rate; Driftnet fishery; Common dolphin; Linear model; Taux de survie; Pêche au filet maillant dérivant; Modèle linéaire; Modèle linéaire.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/publication-865.pdf
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Approche de l'impact écologique de la pêcherie thonière au filet maillant dérivant en Atlantique nord-est ArchiMer
Goujon, Michel; Antoine, Loic; Collet, Anne; Fifas, Spyros.
This document presents the results of a study on the impact of the french albacore tuna drift net fishery, mainly at the dolphins population level. Data collected during two embarked observers campains in 1992 and 1993 and the results of a sighting survey in 1993 give an estimation of the population size of common and striped dolphins (61 888 and 73 843) and mean values of ratio fishing of mortality (0.7 and 1.6%). A model was built in order to simulate the effect of the 5% upper limits of fishing mortality (1.5 and 3%). These values would leed to an annual rate of decrease of -1 %. It is unlikely that such values would jeopardize the survival and the presence of these species. Total incidental catches represent 15% of these total catch; albacore tuna...
Tipo: Text Palavras-chave: Impact écologique; Filets maillants; Mammifères marins; Germon; Ecological impact; Drift nets; Marine mammals; Albacore.
Ano: 1993 URL: https://archimer.ifremer.fr/doc/1993/rapport-6862.pdf
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Collaborative research: Development of a manual on elasmobranch handling and release best practices in tropical tuna purse-seine fisheries ArchiMer
Poisson, Francois; Seret, Bernard; Vernet, Anne-lise; Goujon, Michel; Dagorn, Laurent.
The reduction of by-catch mortality is an objective of the ecosystem approach to fisheries and a request made by consumers. Elasmobranchs, an important component of the French tropical tuna purse seine fishery by-catch, are currently thrown back into the sea. Fishers interact with various types of elasmobranchs that range widely in size, weight and shape, and could pose various degrees of danger to the crew. A diversity of discarding practices within the fleet were reported, some practices were considered suitable, others needed to be adapted and improved and others simply had to be banned. The majority of the crews were likely to improve their handling practices if they were presented with practical suggestions that were quick and easy. Combining...
Tipo: Text Palavras-chave: By-catch; Tropical purse-seiner; Sharks; Handling/release practices; Mitigation; Fish welfare.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00159/27008/28367.pdf
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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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Effets du plan de protection des thonides de l'Atlantique 1998-1999 d'apres les observations faites sur les thoniers senneurs geres par les armements francais ArchiMer
Goujon, Michel; Labaisse-bodilis, C.
In 1998, the French and Spanish tuna-boat owners associations have volentarily reconducted the Atlantic tuna protection plan (also called moratorium) initiated the previous year. This plan which has become an iccat recommendation for 1999, consists mainly in preventing fishing on floating objects (logs) and in having observers on board tuna purse seiners. Data collected by these observers and landing statistics allow to draw preliminary conclusions on some effects of the protection plan, on the fleets and on the Atlantic tuna stocks. Largely respected, the moratorium has led to a spatial redistribution of the fishing effort, an important reduction of the proportion of sets on logs and a decrease of the landings by one third compared to those realised the...
Tipo: Text Palavras-chave: Attracting techniques Fishery management Fishery policy Fishery protection Fishery regulations Purse seining Seiners Tuna fisheries Article Geographic Terms: A; Atlantic.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00042/15313/12660.pdf
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Impact de la pêcherie thonière au filet maillant dérivant en Atlantique nord-est sur le dauphin commun et le dauphin bleu et blanc ArchiMer
Antoine, Loic; Goujon, Michel.
Ce document présente des résultats partiels de l'étude menée par l'IFREMER sur la pêcherie germonière au filet maillant dérivant à la demande du Secrétariat d'Etat à la mer. Cette demande fait suite à la dérogation accordée par le Conseil des Communautés dans le cadre de la réglementation de la pêche au filet maillant dérivant. Il repose principalement sur l'analyse des données de captures accidentelles de cétacés, collectées au cours des campagnes d'observateurs embarqués en 1992 et 1993, ainsi que sur les résultats d'une campagne d'évaluation directe des populations de cétacés en 1993. Le prélèvement que représente les captures accidentelles sur les populations de dauphins a été estimé. Les derniers observateurs ayant débarqué le 8 octobre dernier,...
Tipo: Text
Ano: 1993 URL: http://archimer.ifremer.fr/doc/00069/18016/15544.pdf
Registros recuperados: 6
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