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Auteur (up) Avadi, A.; Freon, P.
Titre Life cycle assessment of fisheries: A review for fisheries scientists and managers Type Article scientifique
Année 2013 Publication Revue Abrégée Fisheries Research
Volume 143 Numéro Pages 21-38
Mots-Clés assessment; cycle; life
Résumé This review aims to synthesise and discuss current literature applying the Life Cycle Assessment (LCA) framework for the environmental assessment of fisheries. The review introduces and illustrates the LCA framework, and highlights energy use by fishing vessels, among other key factors determining environmental impacts of fisheries operations. Moreover, the review concludes with recommendations on future developments of LCA in the fisheries and seafood sectors. We reviewed 16 studies on LCA applied to fisheries, with perspectives from a few additional publications on closely related topics. The main Aspects considered in the ad hoc comparison of studies include: scope and system boundaries, functional units, allocation strategies for co-products, conventional and fishery-specific impact categories used, fuel use, impact assessment methods, level of detail in inventories, normalisation of results and sensitivity analyses. A number of patterns and singularities were detected. Fishery-specific impact categories, despite not being standardised, and fuel use in fishing operations were identified as the main contributors to environmental impacts. Energy efficiency was found to be strongly related to the fishing gear used. Several studies discussed the impacts of antifouling substances and metals use. The need for standardisation of fisheries LCA research is justified and ideas on how to do so and what elements to standardise (fisheries-specific impact categories, inventory details, normalisation references, etc.) are discussed. Finally, fisheries LCA constitute a useful research field when studying the sustainability of seafood and fisheries-based agrifood, and it should likewise contribute to an ecosystem approach to fisheries.
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ISSN 0165-7836 ISBN Médium
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Numéro d'Appel LL @ pixluser @ collection 228
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Auteur (up) Braham, C.B.; Freon, P.; Laurec, A.; Demarcq, H.; Bez, N.
Titre New insights in the spatial dynamics of sardinella stocks off Mauritania (North-West Africa) based on logbook data analysis Type Article scientifique
Année 2014 Publication Revue Abrégée Fisheries Research
Volume 154 Numéro Pages 195-204
Mots-Clés
Résumé Sardinella spp. are the main species fished in Mauritanian waters. Logbook data (1991&8211;2009) were used to standardise CPUE. This clearly revealed that the abundance of sardinella peaked in the warm season (July&8211;September) which is the main, if not the only significant spawning season for round sardinella.

This study does not directly confirm or falsify the common belief that the adults migrate from the Senegalese EEZ up to north of the 21° N latitude, but it presents a variety of new hypotheses. If a single transboundary stock exists, part of its individuals, or a sub-stock, is probably more sedentary and remains in the permanent upwelling area located in northern Mauritania and southern Morocco.

Between years, changes in abundance index are dominated by a decrease from 1996 to 2006, depending on the months taken into account, and especially whether or not the warm (spawning) season is considered. For a given month, the spatial distribution of sardinella shows limited differences between years. In the southernmost latitudes of the Mauritanian EEZ the seasonal pattern, which is dominated by high catch rates during the warm season, is much stronger after the year 2001, and then tended to increase year after year.

Changes in species distribution and abundance during the twenty-year study period are difficult to relate to environmental dynamics. However, an inversion of the upwelling trend was observed in 2001, matching a change in the seasonality of sardinella catches, although the causality between the two phenomena could not be established. The increase in the abundance index of sardinella in the last five years, particularly during most of the core fishing season (July&8211;September) might be due to favourable oceanographic conditions (higher upwelling index) and/or changes in the fishing strategies or efficiency. Before annual indices of abundance can be used in the future, it will be necessary to better understand possible changes in catchability during the warm/spawning season.
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ISSN 0165-7836 ISBN Médium
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1147
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Auteur (up) Chaboud, C.; Fall, M.; Ferraris, J.; Fontana, A.; Fonteneau, A.; Laloë, F.; Samba, A.; Thiao, D.
Titre Comment on “Fisheries catch misreporting and its implications: The case of Senegal” Type Article scientifique
Année 2015 Publication Revue Abrégée Fisheries Research
Volume 164 Numéro Pages 322-324
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Résumé
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Numéro d'Appel MARBEC @ isabelle.vidal-ayouba @ collection 1247
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Auteur (up) Coll, M.; Carreras, M.; Cornax, M.J.; Massuti, E.; Morote, E.; Pastor, X.; Quetglas, A.; SàeZ, R.; Sobrino, I.; Torres, M.A.; Tudela, S.; Harper, S.; Zeller, H.; Pauly, D.
Titre Closer to reality : reconstructing total removals in mixed fisheries from Southern Europe Type Article scientifique
Année 2014 Publication Revue Abrégée Fisheries Research
Volume 154 Numéro Pages 179-194
Mots-Clés
Résumé Underestimation of catches is especially important in countries where fishing fleets are highly diversified, the enforcement of fishery management is low, data availability is poor, and there is high demand for fish products in local markets. This is the case for southern European and Mediterranean regions. Adapting a catch-reconstruction approach, we estimated the total removals of marine resources by Spain for the Spanish Mediterranean Sea and Gulf of Cadiz regions from 1950 to 2010. We collected available information from scientific publications, the grey literature and secondary sources of information to complement officially reported catch data. We assessed missing catch sectors as time-point estimates, used as anchor points of reliable data upon which we then estimated total catch using interpolation to fill in the periods for which quantitative data were missing. Unreported removals and discards represented important portions of total removals in the study area. They accounted for, on average, 43% of total removals between 1950s and 2010, and were composed of black market sales, subsistence fishing, artisanal fishing, recreational fishing and illegal catch, in addition to discarding. By the late 2000s, recreational fishing was the most important sector for unreported landings (similar to 36%), followed by black market sales (similar to 32%), subsistence fishing (similar to 17%), unreported artisanal fishing (similar to 12%) and illegal catch (similar to 2%). The overall catch trend differed from the official trend highlighting that the depletion of marine resources in the region started earlier than previously observed. The catch composition changed with time, with a higher diversification of species in fish markets with time. These results indicate an earlier trend towards expansion of fisheries and depletion of marine resources.
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Editeur Lieu de Publication Éditeur
Langue eng Langue du Résumé Titre Original
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ISSN 0165-7836 ISBN Médium
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Numéro d'Appel LL @ pixluser @ collection 381
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Auteur (up) Dagorn, L.; Holland, K.N.; Filmalter, J.
Titre Are drifting FADs essential for testing the ecological trap hypothesis ? Type Article scientifique
Année 2010 Publication Revue Abrégée Fisheries Research
Volume 106 Numéro Pages 60-63
Mots-Clés ecological; Fad; hypothesis; trap; Tunas
Résumé Because tropical tunas are known to aggregate around floating objects, it has been suggested that the large number of drifting fish aggregating devices (FADS) built and deployed by purse seiners could act as an 'ecological trap'. This hypothesis states that these networks of drifting FADS could take fish to areas where they would not normally go or retain them in places that they would otherwise leave. Because the ecological trap hypothesis was first advanced for drifting FADs, some have argued that only studies using drifting FADs can test this hypothesis. However, because working with drifting FADs is difficult, accepting this precept would preclude the scientific community from providing urgently needed information to organizations charged with management of fisheries that exploit drifting FADs. We argue that because both anchored and drifting FADs alter the natural environment, the more easily accessible anchored FADs can be used to test the ecological trap hypothesis. Also, based on a comparative scientific approach, we argue that understanding the behaviour of tunas around anchored FADs can improve our general understanding of tunas around all types of floating objects and help design new, well focused studies for drifting FADs. As anchored FADs are easier to access and offer a greater potential for research, we encourage scientists to design and conduct studies (in particular on the behaviour of fish at FADS) around the moored structures.
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Editeur Lieu de Publication Éditeur
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Numéro d'Appel LL @ pixluser @ collection 66
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