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Title of Journal: Reg Environ Change

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Abbravation: Regional Environmental Change

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Springer Berlin Heidelberg

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DOI

10.1002/piq.21223

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1436-378X

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Climate impact on Italian fisheries Mediterranean

Authors: Tomaso Fortibuoni Federica Aldighieri Otello Giovanardi Fabio Pranovi Matteo Zucchetta
Publish Date: 2015/03/28
Volume: 15, Issue: 5, Pages: 931-937
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Abstract

Global warming is increasingly affecting marine ecosystems and ecological services they provide One of the major consequences is a shift in species geographical distribution which may affect resources availability to fisheries We computed the mean temperature of the catch MTC for Italian catches from 1972 to 2012 to test if an increase of warmerwater species against colderwater ones was observed We further analysed the relationship among MTC landings fishing effort and climatic factors through a Linear Mixed Models approach Global MTC increased at a rate of 012 °C per decade Though by considering the influence of sea surface temperature SST a strongest increase 031 °C was estimated in southernmost areas while in the northernmost basin Northern Adriatic Sea a decrease of 014 °C was observed SST resulted the most relevant driver and the relationship between MTC and SST showed a high spatial variability both in terms of strength and sign being positively stronger in southernmost areas while negative in the northernmost basin The result is probably underestimated since several psychrophilous and thermophilous species were not included in the analysis However it seems that a change towards warmerwater species has already occurred in Italian marine ecosystems Conversely total landings temporal dynamics seem mostly driven by changes in fishing effort rather than by MTC and climatic factors Consequently fishery management strategies need to focalize primarily on fishing effort reduction in order to reduce the pressure on the stocks while increasing their resilience to other stressors among which global warmingWe acknowledge M Gambino and L Labanchi for providing landing and fishing effort data the Italian Ministry of Agricultural Food and Forestry Policies for granting permission to use MEDITS data We also thank V Meccia for preparing and providing data of SST and NAO The study benefited from discussions with colleagues of the ICES Working Group on the History of Fish and Fisheries who are warmly thanked

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