La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Catch me in winter! Seasonal variation in air temperature severely enhances physiological stress and mortality of species subjected to sorting operations and discarded during annual fishing activities
Auteurs :	Folco Giomi, Auteur ; Sasa Raicevich, Auteur ; Otello Giovanardi, Auteur ; Fabio Pranovi, Auteur ; Paolo Di Muro, Auteur ; Mariano Beltramini, Auteur
Type de document :	Article
Dans :	Hydrobiologia (606 JUL 2008)
Article en page(s) :	195-202
Résumé :	Several studies have considered the direct and indirect effects of demersal trawling on discarded species in terms of sublethal damages, survival, and stress due to the fishing processes. Nevertheless the effects of air temperature on the physiological stress and the survival of species during sorting operations were only marginally explored. This factor could be particularly important in the context of sustainable fisheries at temperate latitudes where the seasonal variation of air temperature can be particularly pronounced. In this study the seasonal effects of rapido trawling on the non-target species Liocarcinus depurator (Portunidae) in the Northern Adriatic Sea (Mediterranean Sea) have been compared by applying survival tests and considering the unbalance in metabolites' concentration as indicators of physiological stress. Results showed consistently higher mortalities during exposure to air in summer (temperature: 28 degrees C), which reached about 96% in

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