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Assessment of impacts from human activities on ecosystem components in the Bay of Biscay in the early 1990s ArchiMer
Lorance, Pascal; Bertrand, Jacques; Brind'Amour, Anik; Rochet, Marie-joelle; Trenkel, Verena.
The ecosystem-based approach to fisheries management and, more specifically, the European Marine Strategy Framework Directive require the assessment of the state and dynamics of an ecosystem in order to determine suitable management strategies. This paper takes an analytical approach to assess the state of the Bay of Biscay ecosystem in the early 1990s, chosen as a period of reference because key monitoring data series have been collected since then. To assess the state of the ecosystem, the pressures exerted by six broad categories of human activities were examined. A literature review of the ecosystem components was made and a component tree was tailored according to data availability. Data rich components were subdivided into subcomponents for their...
Tipo: Text Palavras-chave: Reference state; Ecosystem based management; Human pressure; Inventory; Atlantic Ocean.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00000/11164/7520.pdf
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Campagne internationale de chalutage démersal en Méditerranée (MEDITS). Rapport final ArchiMer
Bertrand, Jacques.
Le présent projet de programme international s'inscrit dans la ligne des recommandations de différents forums scientifiques (CSTP, séminaire européen d'Ancone, etc.) qui ont exprime le besoin de connaissances biologiques sur les espèces démersales exploitées par les flottilles de pêche en Méditerranée. Ces groupes avaient reconnu que les caractéristiques de la pêche dans cette région, et en particulier la forte dispersion de lactivité, ne permettaient pas de recueillir les informations nécessaires à une évaluation globale des ressources halieutiques de la région avec un niveau de précision suffisant à partir des résultats de lactivité des flottilles professionnelles. Le présent projet fait également référence a l'urgente nécessité, reconnue par la...
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Ano: 1994 URL: http://archimer.ifremer.fr/doc/1994/rapport-3938.pdf
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Campagnes internationales de chalutage de fond en Méditerranée (MEDITS). Manuel des protocoles ArchiMer
Bertrand, Jacques.
This document is the second version of a manual written in the framework of an international project aimed at harmonizing the sampling protocols, through bottom trawling, of demersal resources in the Mediterranean Sea (MEDITS program). It will be used as a reference document for the cruises that will be conducted in 1995 by Spanish, French, Greek and Italian research centres on continental slopes and shelves around these four countries. This manual describes the characteristics of the selected sampling device, as well as sampling methods and the samples processing. Finally, it describes data exchange media specifications.
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Ano: 1999 URL: http://archimer.ifremer.fr/doc/1999/rapport-3933.pdf
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Caractérisation de la contamination de la faune halieutique par la chlordécone autour de la Guadeloupe. Résultats des campagnes de 2008 à 2011 (projet CarGual). ArchiMer
Bertrand, Jacques; Guyader, Olivier; Reynal, Lionel.
In the French West Indies islands, the transfer of chlordecone (kepone) from treated grounds towards the marine environment has been proved since the beginning of 2000s. In 2008, a maximal residue limit (MRL) was set at 20 µg / kg wet weight in fish and seafood, and therefore intensified the concern about the risks of high human exposure to the pesticide due to the consumption of contaminated marine products. To answer this concern, several sampling cruises were carried by public authorities and by Ifremer in order to analyze the contamination of the fish fauna around the Guadeloupe island. The data collected within these surveys improved our knowledge on the characteristics of the contamination of fish fauna and allowed to assess the distribution of this...
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Ano: 2013 URL: http://archimer.ifremer.fr/doc/00136/24762/22840.pdf
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Chlordecone in the marine environment around the French West Indies: from measurement to pollution management decisions ArchiMer
Bertrand, Jacques; Bodiguel, Xavier; Abarnou, Alain; Reynal, Lionel; Bocquene, Gilles.
Chlordecone is a very persistent insecticide used in banana plantations of the French West Indies between 1972 and 1993. Chlordecone residues were found in inland water, in agricultural and freshwater products, and in marine organisms. This pollution has become of great concern in 2007. Therefore, a governmental action Plan was launched to better assess the pollution and to improve the consumer’s protection. Within this plan, 1048 samples from 69 different species of marine fishes and crustaceans were collected all around both the Guadeloupe and the Martinique Islands and analyzed. The results confirm the presence of chlordecone in marine organisms, with highly variable concentrations (from the detection limit to 1000 μg.kg-1). In 17.9 % of the samples,...
Tipo: Text Palavras-chave: Chlordecone (Kepone); French West Indies; Fishes; Crustaceans; Organochlorinated contaminant; Risk assessment; Pollution management.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00014/12511/9361.pdf
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Combining indicator trends to assess ongoing changes in exploited fish communities: diagnostic of communities off the coasts of France ArchiMer
Rochet, Marie-joelle; Trenkel, Verena; Bellail, Robert; Coppin, Franck; Le Pape, Olivier; Mahe, Jean-claude; Morin, Jocelyne; Poulard, Jean-charles; Schlaich, Ivan; Souplet, Arnauld; Verin, Yves; Bertrand, Jacques.
We present a method for combining individual indicator results into a comprehensive diagnostic of fishing impacts on fish populations and communities. A conceptual framework for interpreting combined trends in a set of simple indicators is proposed, relying beforehand on qualitative expectations anchored in ecological theory. The initial state of the community is first assessed using published information. Which combinations of trends are acceptable or undesirable is decided, depending on the initial status. The indicators are then calculated from a time-series and their time trends are estimated as the slopes of linear models. Finally, the test results are combined within the predefined framework, providing a diagnostic on the dynamics of fishing impacts...
Tipo: Text Palavras-chave: Scientific surveys; Multispecies fisheries; Indicators; Ecosystem approach to fisheries management.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-773.pdf
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Consolidation des connaissances sur la contamination de la faune halieutique par le chlordécone autour de la Martinique et de la Guadeloupe (Projet "CHLOHAL") ArchiMer
Dromard, Charlotte; Allenou, Jean-pierre; Bouchon-navaro, Yolande; Lemoine, Soizig; Thouard, Emmanuel; Reynal, Lionel; Bertrand, Jacques; Bouchon, Claude.
Le projet CHLOHAL comportait deux études. La première portait sur la cartographie de la contamination par la chlordécone des espèces halieutiques autour des îles de la Martinique et de la Guadeloupe ; la seconde avait pour but d'analyser le cheminement de cette contamination dans les réseaux trophiques des écosystèmes côtiers (mangroves, herbiers de Phanérogames marines et récifs coralliens), dans le but d'élucider les mécanismes de transfert de cette pollution vers le milieu marin.  L’étude cartographique de la contamination des espèces halieutiques dans les deux îles du projet Chlohal confirme l’image globale de la sensibilité des zones polluées identifiées par les études antérieures. Elle met cependant en évidence des concentrations significatives sur...
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Ano: 2015 URL: http://archimer.ifremer.fr/doc/00429/54058/55370.pdf
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Devenir de la chlordécone dans les réseaux trophiques des espèces marines consommées aux Antilles (CHLORETRO) ArchiMer
Bodiguel, Xavier; Bertrand, Jacques; Fremery, Juliette.
La chlordécone est un insecticide organochloré qui a été utilisé aux Antilles de 1972 à 1993 afin de combattre un charançon s’attaquant aux racines des bananiers. Très persistant dans le milieu, la molécule est véhiculée des terres contaminées vers les systèmes aquatiques par le biais des matières particulaires fines, contaminant ainsi le milieu marin côtier. L’objectif de l'étude était de caractériser le devenir de la chlordécone dans les réseaux trophiques de la macrofaune côtière. Il s'agissait en particulier de tenter d’identifier ses voies d’entrée à partir des apports terrigènes et sa propagation au sein de ces réseaux. Le modèle d'étude est une baie de la Martinique, avec les herbiers à phanérogamme comme système de production primaire. Les...
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Ano: 2011 URL: http://archimer.ifremer.fr/doc/00036/14684/11986.pdf
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Diagnostic de la contamination chimique de la faune halieutique des littoraux des Antilles françaises. Campagnes 2008 en Martinique et en Guadeloupe ArchiMer
Bertrand, Jacques; Abarnou, Alain; Bocquene, Gilles; Chiffoleau, Jean-francois; Reynal, Lionel.
During the years 1972-1993, kepone a persistent pesticide has been used in the banana fields of the French West Indies (Martinique and Guadeloupe) to content a weevil. A slow desorption of the molecule from soil induces its transfer to the sea through the rivers from leaching and erosion. This study intended to take stock on the contamination by kepone of the fishery species around the islands fifteen years after the kepone ban. Furthermore other chemical pollutants were sought in fish and shellfish around the Martinique island. The results confirmed persistence of marine fauna contamination by kepone, mainly in the alluvium areas in front of polluted rivers. They shown also that this contamination may spread more widely but with fast decreasing through...
Tipo: Text Palavras-chave: Antilles; Chlordécone; Pollution chimique; Environnement marin; Caribbean; Kepone; Chemical pollution; Marine environment.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/rapport-6896.pdf
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Distribution des tailles de homard (Homarus gammarus L.) le long des côtes bas-normandes ArchiMer
Bertrand, Jacques.
Observations on lobsters catch with pots along the coasts of Basse-Normadie prove that large variations in the distribution of weight appear on adjoining zones. Influence of factors as environement, particularly substrat and tide, as also fishing effort are analysed. Effects of the evolutions in the year of animals catchability are also expected.
Tipo: Text Palavras-chave: Crustacés; Crustacea; Homard; Homarus gammarus; Normandie; Pêche; Distribution; Basse Normandie.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/00009/11984/8688.pdf
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Do changes in environmental and fishing pressures impact marine communities? An empirical assessment ArchiMer
Rochet, Marie-joelle; Trenkel, Verena; Carpentier, Andre; Coppin, Franck; Gil De Sola, Luis; Leaute, Jean-pierre; Mahe, Jean-claude; Maiorano, Porzia; Mannini, Alessandro; Murenu, Matteo; Piet, Gerjan; Politou, Chrissi-yianna; Reale, Bruno; Spedicato, Maria-teresa; Tserpes, George; Bertrand, Jacques.
P>1. The development of ecosystem approaches to environmental management implies the need to account for multiple pressures on ecosystems. Trends in multiple metrics that respond differently to changes in major environmental pressures need to be combined to evaluate the impacts of fishing and environmental changes on fish communities. 2. An exploited fish community is viewed as a three-level food chain in which the two upper levels, or functional groups, are targeted by fishing fleets, while the lowest level is subject to environmental variation. Qualitative modelling is used to predict changes at the two upper levels, that is, top-down vs. bottom-up perturbations. Abundance and length metrics are calculated from survey data for 14 Mediterranean and...
Tipo: Text Palavras-chave: Bottom-up control; Community metrics; Compensation; Ecosystem approach to fisheries; Ecosystem assessment; Functional groups; Groundfish community; Mediterranean; North Atlantic; Top-down control.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00008/11925/8637.pdf
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Do population and community metrics tell the same story about recent changes in Northern Mediterranean fish communities? ArchiMer
Rochet, Marie-joelle; Trenkel, Verena; Gil De Sola, Luis; Politou, Chrissi-yianna; Tserpes, George; Bertrand, Jacques.
This document presents a comparative study of human impacts on the length-structure of fish communities across North-Mediterranean ecosystems. We use survey data to examine trends in length-based metrics and their consistency within and among the two levels of organisation populations and communities, and to suggest interpretations of observed trend combinations. We start from a set of population processes potentially affected by human pressures: fishing will induce mortality especially in target species, whereas the hydrological environment and eutrophication potentially affect recruitment and individual growth. How population changes will be reflected at the community level is expected to depend on community evenness. Based on this expectation, a...
Tipo: Text Palavras-chave: Community metrics; Ecosystem approach to fisheries; Fish community; Length-based metrics; Mediterranean; Survey data.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/00133/24377/22389.pdf
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Ecosystem trends: evidence for agreement between fishers' perceptions and scientific information ArchiMer
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
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Estimateurs d'indices d'abondance dans le cas d'échantillonnages stratifiés ArchiMer
Bertrand, Jacques; Chevalier, Robert.
One of the primary uses of trawl survey data is the estimation of abundance of the species involved. But these direct estimates give results with generally a high variability. Reducing this latter is one of the main problems for the scientists involved in such a research. Methods to achieve a better efficiency have been implemented. Nevertheless estimations remain highly variable, so the information on the changes in population, enclosed in the observed series of survey indices is mixed with a noise component result of both the survey sampling variability and effect of uncontrolled factors. PENNING'roN ( 1985) proposed time series models to filter measurement error from the signal. However the length of the series does not always allow using time series...
Tipo: Text
Ano: 1988 URL: http://archimer.ifremer.fr/doc/00388/49925/50499.pdf
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Etude de la contamination de la langouste blanche Panulirus argus et de la langouste brésilienne P. guttatus par la chlordécone le long de la côte atlantique de la Martinique. Campagnes 2011 ArchiMer
Bertrand, Jacques; Dromer, Clement; Reynal, Lionel.
Spiny lobsters are an important component of the coastal fisheries around the Martinique island. This study aimed to assess the contamination by kepone of the two main species Panulirus argus and P. guttatus in the main fishery area laying along the eastern coast of Martinique. The objectives of the study were to describe the distribution of the spiny lobster contamination in the area, to explore possible relationships with some biological parameters such as individual size, sex and colour of tegument, as well as characterize difference of kepone concentration between the muscle and soft flesh of the head, in view of helping the definition of further fishery management measures. The analyses were done from chemical analyses of 125 samples of spiny lobsters...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00088/19971/17638.pdf
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Étude de surveillance écologique des ressources halieutiques Paluel (Seine Maritime). 2ème Partie. Pêche et biologie des espèces. 1978-1979-1980 ArchiMer
Bertrand, Jacques; Deschamps, Gerard; Tetard, Alain; Liorzou, Bernard.
L'étude de projet des ressources halieutiques du secteur de Paluel avait permis d'identifier les principales activités de pêche pratiquées dans la zone côtière. Il a été possible de distinguer trois groupes caractéristiques : le chalutage et la pêche aux engins dormants ainsi qu'une pêche saisonnière du hareng. Des échantillonnages réalisés tant au chalut qu'aux engins dormants ont permis de dresser l'inventaire des espèces présentes sur le secteur.
Tipo: Text
Ano: 1981 URL: http://archimer.ifremer.fr/doc/00046/15710/13112.pdf
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Etude des activites halieutiques le long du littoral. Releves thermographiques en baie de la Possession et en baie de Saint Paul (La Réunion) ArchiMer
Bertrand, Jacques; Biais, Gerard; Taquet, Marc.
The follow-up of the activity of the boats practising offshore fishing in the North-West of the La Réunion Cbaies of the Possession and Paul Saint) was carried out over one year(April 86 - March 87) thanks to the application of a strategy of sampling allowing the collection of the following statistics: total effort and by machine, captures total and by species.The study allowed a first approach of the space-time distribution of the activity of the fleet. It reveals the very high participation of the yachtmen in the halieutic exploitation of the studied sector. It also highlights the importance of tunas in the captures, which in weight are largely majority.
Tipo: Text Palavras-chave: La Réunion; Echantillonnage; Petite pêche; La Réunion; Sampling; Small fishing.
Ano: 1987 URL: https://archimer.ifremer.fr/doc/1987/rapport-1584.pdf
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Étude halieutique de projet de site FLAMANVILLE (Manche) - Premier cycle annuel. Volume III - Biologie halieutique ArchiMer
Bertrand, Jacques; Tetard, Alain; Liorzou, Bernard; Peronnet, Isabelle; Leblond, Eric; Nedelec, Daniel.
L'Etude de Projet des ressources halieutiques présentes dans le secteur de Flamanville a pour objectif, dans une première phase, de préciser les données générales sur la pêche présentées dans le rapport d'Avant-projet (PERODOU, 1976), en s'attachant notamment à l'analyse des variations saisonnières et spatiales. Cette première étape conduit à l'étude biologique des principaux groupes de la macrofaune fréquentant le secteur, étude qui ne prendra tout son sens qu'intégrée aux autres volets du programme général de travaux commandé par-E.D.F. : hydrologie, plancton, benthos
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Ano: 1979 URL: http://archimer.ifremer.fr/doc/00045/15650/13053.pdf
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Etude halieutique de projet de site. FLAMANVILLE (Manche). Rapport sur deux cycles annuels. IIème partie : Biologie Halieutique. Volume I et II ArchiMer
Bertrand, Jacques; Liorzou, Bernard; Peronnet, Isabelle.
Le choix de Flamanville comme site d'implantation d'une centrale électronucléaire a conduit l'ISTPM à réaliser une "étude de Projet" des ressources halieutiques du secteur compris entre Carteret, le cap de La Hague et les îles anglonormandes, d'avril 1977 à septembre 1979. Un rapport de premier cycle de travaux a été déposé en décembre 1978. Le présent document constitue le rapport final de cette étude.
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Ano: 1981 URL: http://archimer.ifremer.fr/doc/00045/15631/13034.pdf
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Etude halieutique de projet de site. PALUEL (Seine-Maritime). Rapport sur le premier cycle annuel. ArchiMer
Woehrling, D.; Martin, Jocelyne; Halgand, D.; Bigot, J.l.; Le Pennec, M.a.; Giret, M.; Deschamps, G.; Bertrand, Jacques; Leblond, E.; Nedelec, Daniel.
Dans l'étude écologique générale du milieu marin côtier dans lequel sera prise et rejetée l'eau de refroidissement des centrales thermonucléaires implantées en bord de mer, les travaux demandés à l'ISTPM ont trait aux ressources halieutiques. Au stade du "Projet" les recherches couvrent deux cycles annuels complets et portent, d'une part sur l'état actuel et potentiel des pêcheries dépendant du milieu récepteur, d'autre part sur la fraction zooplanctonique en relation plus directe avec la biologie des pêches et dont l'étude est conduite selon des méthodes d'investigation spécifiques. Pour le site de Paluel, les opérations ont commencé au début de l'année 1975, L'inventaire qualitatif et quantitatif d'un certain nombre d'espèces en est l'objet principa l;...
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Ano: 1979 URL: https://archimer.ifremer.fr/doc/00431/54301/59437.pdf
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