"Once upon a time in the Mediterranean" long term trends of Mediterranean fisheries resources based on fishers' Traditional Ecological Knowledge

PloS One
Dimitrios DamalasPaolo Sartor

Abstract

We investigate long-term changes in the Mediterranean marine resources driving the trawl fisheries by analysing fishers' perceptions (Traditional Ecological Knowledge, TEK) throughout the Mediterranean Sea during the last 80 years. To this end, we conducted an extended set of interviews with experienced fishers that enabled us to classify species (or taxa) as 'decreasing' or 'increasing' both in terms of abundance, as well as average size in the catch. The aspect that most clearly emerged in all the investigated areas over time was the notable increase of fishing capacity indicators, such as engine power and fishing depth range. Atlantic mackerel, poor cod, scorpionfishes, striped seabream, and John Dory demonstrated a decreasing trend in the fishers' perceived abundance, while Mediterranean parrotfish, common pandora, cuttlefish, blue and red shrimp, and mullets gave indications of an increasing temporal trend. Although, as a rule, trawler captains did not report any cataclysmic changes (e.g. extinctions), when they were invited to estimate total catches, a clear decreasing pattern emerged; this being a notable finding taking into account the steep escalation of fishing efficiency during the past century. The overall deteriora...Continue Reading

References

May 1, 1930·The British Journal of Ophthalmology·S Wood
Jun 12, 2008·Conservation Biology : the Journal of the Society for Conservation Biology·Francesco FerrettiHeike K Lotze
Dec 11, 2008·PloS One·Marta CollFabio Pranovi
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Jun 10, 2010·Ecology Letters·Francesco FerrettiHeike K Lotze
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Sep 22, 2011·PloS One·Miguel Cortés-SánchezNuno F Bicho
Jul 16, 2014·Current Biology : CB·Paraskevas VasilakopoulosGeorge Tserpes

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Software Mentioned

PLoSONE
SIMPER
R
R library vegan Community Ecology Package
EVOMED
Permanova Procedure ( SIMPER
Permanova

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