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Estimates of seabird by-catch along the Patagonian Shelf by Argentine longline fishing vessels, 1999–2001

Published online by Cambridge University Press:  20 November 2003

Marco Favero
Affiliation:
Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, Departamento de Biología. Funes 3250 (B7602AYJ) Mar del Plata, Argentina. E-mail: mafavero@mdp.edu.ar Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Av. Rivadavia 1917 (C1033AAJ) Buenos Aires, Argentina
Camilo Eduardo Khatchikian
Affiliation:
Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, Departamento de Biología. Funes 3250 (B7602AYJ) Mar del Plata, Argentina. E-mail: mafavero@mdp.edu.ar Comisión de Investigaciones Científicas de la Provincia de Buenos Aires. Calle 526 e/ 10 y 11 (1900) La Plata, Argentina
Alejandro Arias
Affiliation:
Dirección de Fauna Silvestre, Secretaría de Ambiente y Desarrollo Sustentable, Ministerio de Desarrollo Social y Medio Ambiente. San Martín 459. 2� piso, of. 264 (C1004AAI) Buenos Aires, Argentina Programa Marino. Fundación Vida Silvestre Argentina. Córdoba 2920 4�B (B7602CAD) Mar del Plata, Argentina
María Patricia Silva Rodriguez
Affiliation:
Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, Departamento de Biología. Funes 3250 (B7602AYJ) Mar del Plata, Argentina. E-mail: mafavero@mdp.edu.ar
Guillermo Cañete
Affiliation:
Programa Marino. Fundación Vida Silvestre Argentina. Córdoba 2920 4�B (B7602CAD) Mar del Plata, Argentina Programa de Observadores a Bordo. Instituto Nacional de Investigación y Desarrollo Pesquero. Paseo Victoria Ocampo 1 (B7602HSA) Mar del Plata, Argentina
Rocío Mariano-Jelicich
Affiliation:
Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales, Departamento de Biología. Funes 3250 (B7602AYJ) Mar del Plata, Argentina. E-mail: mafavero@mdp.edu.ar Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET). Av. Rivadavia 1917 (C1033AAJ) Buenos Aires, Argentina
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Abstract

The incidental mortality of albatrosses Diomedeidae and petrels Procellariidae by longline fishing vessels, has been assessed and analysed in several areas of the globe. We provide the first direct estimates of incidental mortality rates of albatrosses and petrels along the Argentine Shelf and shelf break. The estimated by-catch rate for the whole period analysed (1999-2001) was 0.04 birds/1,000 hooks, with a maximum of 0.20 birds/1,000 hooks observed in 1999. Annual captures averaged 1,160 birds; however, the large variation observed indicates that annual by-catch may be in the order of thousands, with around 10,000 seabirds being killed by longliners through the study period. Most of the captures were observed along the Patagonian shelf break. At least 12 bird species were incidentally taken, with Black-browed Albatrosses Thalassarche melanophris and White-chinned Petrels Procellaria aequinoctialis accounting for about 80% of total captures. The information provided in this study allowed the design and future implementation of mitigation measures and new survey methods onboard longliners operating in Atlantic waters on the Argentine shelf.

Type
Research Article
Copyright
© BirdLife International 2003
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Estimates of seabird by-catch along the Patagonian Shelf by Argentine longline fishing vessels, 1999–2001
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