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A new approach to recruitment overfishing diagnosis based on fish condition from survey data 5
Ordines, Francesc; Lloret, Josep; Tugores, Pilar; Manfredi, Chiara; Guijarro, Beatriz; Jadaud, Angelique; Porcu, Cristina; Gil De Sola, Luis; Carlucci, Roberto; Sartini, Marina; Isajlovic, Igor; Massutti, Enric.
A new approach to recruitment overfishing diagnosis is presented. We hypothesize that condition of recruits should increase when recruitment failures are caused by fishing activity. This would be a consequence of the increase in trophic resource availability, because the population is smaller than that which the ecosystem could support. Temporal series of hake recruit condition were calculated from MEDITS survey data collected in Mediterranean geographical sub-areas (GSAs) 1, 6, 17 and 19 from 1994 to 2015. Multiple linear regressions were used to analyse the relationship between mean annual condition and abundance of recruits and climatic indices in each GSA. Significant correlations were only detected in GSA 6, where 69% of condition variability was...
Tipo: Text Palavras-chave: Merluccius merluccius; Fishery; Recruits; Condition index; Recruitment overfishing; MEDITS survey.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00513/62458/66762.pdf
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Body reserves mediate trade-offs between life-history traits: new insights from small pelagic fish reproduction 5
Brosset, Pablo; Lloret, Josep; Munoz, Marta; Fauvel, Christian; Van Beveren, Elisabeth; Marques, Virginie; Fromentin, Jean-marc; Menard, Frederic; Saraux, Claire.
Limited resources in the environment prevent individuals from simultaneously maximizing all life-history traits, resulting in trade-offs. In particular, the cost of reproduction is well known to negatively affect energy investment in growth and maintenance. Here, we investigated these trade-offs during contrasting periods of high versus low fish size and body condition (before/after 2008) in the Gulf of Lions. Female reproductive allocation and performance in anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) were examined based on morphometric historical data from the 1970s and from 2003 to 2015. Additionally, potential maternal effects on egg quantity and quality were examined in 2014/2015. After 2008, the gonadosomatic index increased for...
Tipo: Text Palavras-chave: Maternal effect; Northwest Mediterranean; Anchovy; Sardine.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00353/46458/46233.pdf
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Spatio-temporal patterns and environmental controls of small pelagic fish body condition from contrasted Mediterranean areas 5
Brosset, Pablo; Fromentin, Jean-marc; Van Beveren, Elisabeth; Lloret, Josep; Marques, Virginie; Basilone, Gualtiero; Bonanno, Angelo; Carpi, Piera; Donato, Fortunata; Kec, Vanja Cikes; De Felice, Andrea; Ferreri, Rosalia; Gasparevic, Denis; Giraldez, Ana; Gucu, Ali; Iglesias, Magdalena; Leonori, Iole; Palomera, Isabel; Somarakis, Stylianos; Ticina, Vjekoslav; Torres, Pedro; Ventero, Ana; Zorica, Barbara; Menard, Frederic; Saraux, Claire.
Small pelagic fish are among the most ecologically and economically important marine fish species and are characterized by large fluctuations all over the world. In the Mediterranean Sea, low catches and biomass of anchovies and sardines have been described in some areas during the last decade, resulting in important fisheries crises. Therefore, we studied anchovy and sardine body condition variability, a key index of population health and its response to environmental and anthropogenic changes. Wide temporal and spatial patterns were investigated by analyzing separately data from scientific surveys and fisheries in eight Mediterranean areas between 1975 and 2015. Results showed that anchovy and sardine body condition as well as maximum size in some areas...
Tipo: Text Palavras-chave: Anchovy; Sardine; Fish health; Marine monitoring.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00363/47400/47936.pdf
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Synthèse des rencontres entre scientifiques et gestionnaires d'AMP. Rapport du projet LiteauII-AMP. Perpignan, 30 novembre et 1er décembre 2004 5
Pelletier, Dominique; Charbonnel, Eric; Licari, Marie-laure; Lloret, Josep; Riera, Victoria; Auscher, Fabrice; Culioli, Jean-michel; Le Niliot, Philippe.
This report synthesizes the discussions of a workshop organized during the "Liteau II-AMP" project , a collaborative project involving scientists and MPA managers that aimed at developing diagnostic and exploratory tools for the assessment of Marine Protected Areas performance. This 2004-2006 project was funded by the Liteau program (http://www.liteau.ecologie.gouv.fr) of the French Ministry of Ecology and Sustainable Development. The workshop was organized on 30th November and 1st December at the EPHE (University of Perpignan, France). It was aimed at gathering a number of scientists and managers involved in MPA in France and in overseas French territories, in order to discuss the issue of interactions between managers and scientists in the context of...
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Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/rapport-6797.pdf
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The poor health of deep-water species in the context of fishing activity and a warming climate: will populations of Molva species rebuild or collapse? 5
Lloret, Josep; Serrat, Alba; Þórðarson, Guðmundur; Helle, Kristin; Jadaud, Angelique; Bruno, Isabel; Ordines, Francesc; Sartor, Paolo; Carbonara, Pierluigi; Rätz, Hans-joachim.
Many deep‐water fish populations, being k‐selected species, have little resilience to overexploitation and may be at serious risk of depletion as a consequence. Sea warming represents an additional threat. In this study, the condition, or health, of several populations of common ling (Molva molva), blue ling (M. dypterygia) and Mediterranean or Spanish ling (M. macrophthalma) inhabiting different areas in the North Atlantic and the Mediterranean was evaluated, in order to shed light on the challenges these deep water species are facing in the context of fishing activity and a warming climate. The data on the condition of Molva populations which we analyze here has been complemented with data on abundance and, for the southernmost species (Mediterranean...
Tipo: Text Palavras-chave: Condition; Parasitism; Reproduction; Deep‐water fish; Fisheries; Sea warming.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00623/73502/72808.pdf
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