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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 Giomi, F.; Raicevich, S.; Giovanardi, O.; Pranovi, F.; Muro, P.D.; Beltramini, M. (2008). 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. Hydrobiologia 606(1): 195-202. https://dx.doi.org/10.1007/s10750-008-9336-x In: Hydrobiologia. Springer: The Hague. ISSN 0018-8158; e-ISSN 1573-5117, meer Is gerelateerd aan: Giomi, F.; Raicevich, S.; Giovanardi, O.; Pranovi, F.; Muro, P.D.; Beltramini, M. (2008). 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, in: Davenport, J. et al. Challenges to Marine Ecosystems: Proceedings of the 41st European Marine Biology Symposium, held in Cork, Ireland, 4-8 September 2005. Developments in Hydrobiology, 202: pp. 195-202. https://dx.doi.org/10.1007/978-1-4020-8808-7_17, meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 354019 [ aanvragen ]

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Trefwoorden

Biodiversity Catching methods > Net fishing > Trawling Chemical compounds > Organic compounds > Carbohydrates > Saccharides > Monosaccharides > Glucose Fauna > Aquatic organisms > Aquatic animals > Fish Fishing Metabolites Physiological adaptations Physiological responses Population functions > Mortality Properties > Physical properties > Thermodynamic properties > Temperature > Air temperature Seasons > Winter Survival Temporal variations > Periodic variations > Seasonal variations Thermal tolerance Portunidae Rafinesque, 1815 [WoRMS] Marien/Kust

Author keywords

physiological stress; mortality; fishing disturbance; discard;Liocarcinus depurator; Northern Adriatic Sea

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Auteurs		Top
Giomi, F. Raicevich, S. Giovanardi, O.	Pranovi, F. Muro, P.D. Beltramini, M.

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Abstract

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°C), which reached about 96% in 20 min, compared to winter (temperature: 9°C) when only 2% of individuals died. Furthermore trawled and emersed crabs showed significant increase of hemolymph ammonia, lactate, and glucose concentrations as effects of extreme exercise and suffocation, which was more prominent during summer, suggesting that air temperature can play an important role in determining non-target species survival.

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