First evidence of trawling bycatch for Balearic shearwaters

18 April 2012

Evidence for a new threat to the Critically Endangered Balearic shearwater (Puffinus mauretanicus), namely trawling bycatch. Two incidents reported in the Western Mediterranean in May 2011.

Photo by Pere Abelló

Title: Trawling bycatch does affect Balearic Shearwaters (Puffinus mauretanicus)
Author: Pere Abelló & Antonio Esteban
*E-mail: pabello[at]
 Abstract: We herein report two incidents of Balearic Shearwater (Puffinus mauretanicus) trawling bycatch in the western Mediterranean, in May 2011. Both incidents, which involved single individuals, took place during the course of an experimental trawling cruise across the Mediterranean Iberian shelf, and coincided with operations when high numbers of shearwaters were present in relatively shallow waters. These incidents provide for the first time evidence of trawling bycatch for this Critically Endangered seabird. Although trawling bycatch events appear to be rare, they could be of concern under particular conditions, and further research is needed to assess the relevance of this threat.

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Títol: L’arrossegament afecta la mortalitat de Baldrigues Balears (Puffinus mauretanicus)
Autors: Pere Abelló & Antonio Esteban
*E-mail: pabello[at]
Resum: En aquest treball es presenten dos incidents de mortalitat de Baldrigues Balears (Puffinus mauretanicus) durant activitats de pesca d’arrossegament a la Mediterrània occidental el juny de 2011. Fins al moment no es coneixien evidències directes d’impacte negatiu de les activitats de pesca d’arrossegament sobre aquesta espècie en perill. Ambdós incidents van tenir lloc en zones relativament somes en coïncidència amb elevades densitats de baldrigues.
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Título: El arrastre afecta la mortalidad de Pardelas Baleares (Puffinus mauretanicus)
Autores: Pere Abelló & Antonio Esteban
*E-mail: pabello[at]
Resumen: En este trabajo se presentan dos incidentes de mortalidad de Pardela Balear (Puffinus mauretanicus) durante actividades de pesca de arrastre en el Mediterráneo occidental en junio de 2011. Hasta el momento no se disponía de evidencias directas de impacto negativo de las actividades de pesca de arrastre sobre esta especie en peligro. Ambos incidentes tuvieron lugar en zonas relativamente someras en coincidencia con elevadas densidades de pardelas.

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Pere Abelló                            Antonio Esteban


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