Incidental catch is the major threat to the survival of loggerhead turtles (Caretta caretta) in the Mediter- ranean and the main reason for their decline. More than 100,000 turtles are estimated to be caught annually due to fishing practices; 10–50% die. Bottom trawls are among the fishing gears exerting the worst impact on sea turtle populations, especially in the coastal waters of Tunisia and Libya, northern Adriatic Sea, the Mediterranean coastal areas of Turkey and Egypt, where the continental shelf is large and turtles in the demersal stage are commonly found also in winter. Seven adult-sized loggerhead tur- tles captured incidentally by bottom trawls in the central-northern Adriatic Sea and treated in rescue centres were tagged with satellite transmitters before release. In this paper Italian bottom trawl track data obtained from vessel monitoring systems (VMSs) were analysed by VMSbase R suite to identify the areas of maximum fishing effort in the Adriatic. These data were combined with satellite information on turtle distribution to provide an interaction index enabling prediction of potential trawl–turtle interac- tion hotspots and periods. The present pilot study can be considered as a risk-analysis approach directed at identifying the areas and times of possible trawling–turtle interactions in a Mediterranean trawl fish- ery. By identifying the areas and seasons at highest risk of turtle bycatch, the index here developed has the potential to provide key information to design and implement mitigation strategies. Vessel moni- toring system is actually in force in several countries, therefore the approach here studied might have a worldwide application.

Lucchetti, A., Pulcinella, J., Angelini, V., Pari, S., Russo, T., Cataudella, S. (2016). An interaction index to predict turtle bycatch in a Mediterranean bottom trawl fishery. ECOLOGICAL INDICATORS, 60, 557-564 [10.1016/j.ecolind.2015.07.007].

An interaction index to predict turtle bycatch in a Mediterranean bottom trawl fishery

RUSSO, TOMMASO;CATAUDELLA, STEFANO
2016

Abstract

Incidental catch is the major threat to the survival of loggerhead turtles (Caretta caretta) in the Mediter- ranean and the main reason for their decline. More than 100,000 turtles are estimated to be caught annually due to fishing practices; 10–50% die. Bottom trawls are among the fishing gears exerting the worst impact on sea turtle populations, especially in the coastal waters of Tunisia and Libya, northern Adriatic Sea, the Mediterranean coastal areas of Turkey and Egypt, where the continental shelf is large and turtles in the demersal stage are commonly found also in winter. Seven adult-sized loggerhead tur- tles captured incidentally by bottom trawls in the central-northern Adriatic Sea and treated in rescue centres were tagged with satellite transmitters before release. In this paper Italian bottom trawl track data obtained from vessel monitoring systems (VMSs) were analysed by VMSbase R suite to identify the areas of maximum fishing effort in the Adriatic. These data were combined with satellite information on turtle distribution to provide an interaction index enabling prediction of potential trawl–turtle interac- tion hotspots and periods. The present pilot study can be considered as a risk-analysis approach directed at identifying the areas and times of possible trawling–turtle interactions in a Mediterranean trawl fish- ery. By identifying the areas and seasons at highest risk of turtle bycatch, the index here developed has the potential to provide key information to design and implement mitigation strategies. Vessel moni- toring system is actually in force in several countries, therefore the approach here studied might have a worldwide application.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/07
English
Turtle Trawl Bycatch Interaction index Vessel monitoring system
project TartaL- ife – Reduction of sea turtle mortality in the professional fishing (LIFE12 NAT/IT/000937)
http://www.scopus.com/inward/record.url?eid=2-s2.0-84939817521&partnerID=40&md5=014a30d325bb04cdbb3ce1a6daf49f1c
Lucchetti, A., Pulcinella, J., Angelini, V., Pari, S., Russo, T., Cataudella, S. (2016). An interaction index to predict turtle bycatch in a Mediterranean bottom trawl fishery. ECOLOGICAL INDICATORS, 60, 557-564 [10.1016/j.ecolind.2015.07.007].
Lucchetti, A; Pulcinella, J; Angelini, V; Pari, S; Russo, T; Cataudella, S
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/128610
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