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Damalas D.,European Commission - Joint Research Center Ispra | Damalas D.,Hellenic Center for Marine Research | Maravelias C.D.,Hellenic Center for Marine Research | Osio G.C.,European Commission - Joint Research Center Ispra | And 3 more authors.
PLoS ONE | Year: 2015

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 deteriorating status of stocks in most Mediterranean regions calls for responsible management and design of rebuilding plans. This should include historical information accounting for past exploitation patterns that could help defining a baseline of fish abundance prior to heavy industrial fisheries exploitation. © 2015 Damalas et al.


PubMed | Consorzio Per Il Centro Interuniversitario Of Biologia Marina Ed Ecologia Applicata cci Cibm, Hellenic Center for Marine Research, CSIC - Institute of Marine Sciences and European Commission - Joint Research Center Ispra
Type: Journal Article | Journal: PloS one | Year: 2015

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 deteriorating status of stocks in most Mediterranean regions calls for responsible management and design of rebuilding plans. This should include historical information accounting for past exploitation patterns that could help defining a baseline of fish abundance prior to heavy industrial fisheries exploitation.


Viva C.,Consorzio Per Il Centro Interuniversitario Of Biologia Marina Ed Ecologia Applicata cci Cibm | Sartor P.,Consorzio Per Il Centro Interuniversitario Of Biologia Marina Ed Ecologia Applicata cci Cibm | Bertolini D.,Consorzio Per Il Centro Interuniversitario Of Biologia Marina Ed Ecologia Applicata cci Cibm | De Ranieri S.,Consorzio Per Il Centro Interuniversitario Of Biologia Marina Ed Ecologia Applicata cci Cibm | Ligas A.,Consorzio Per Il Centro Interuniversitario Of Biologia Marina Ed Ecologia Applicata cci Cibm
Journal of Applied Ichthyology | Year: 2015

Relationships between otolith major axis length (mm) and fish size (total length, cm) were described by means of linear regression analysis for six demersal fish species from the NW Mediterranean: blue whiting (Micromesistius poutassou), greater forkbeard (Phycis blennoides), red mullet (Mullus barbatus), poor cod (Trisopetus minutus capelanus), horse mackerel (Trachurus trachurus), and Mediterranean mackerel (Trachurus mediterraneus). Results show that reconstruction of body size from otolith measurement is possible by applying this approach based on the relationship of otolith length - fish length. © 2015 Blackwell Verlag GmbH.

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