The origins of white-chinned petrels killed by long-line fisheries off South Africa and New Zealand

Polar research

Colleen O'Ryan¹  Christopher J.R. Robertson²  N.M.S. Mareile Techow³  Peter G. Ryan⁵ 

[1] Department of Molecular and Cell BiologyUniversity of Cape Town, Rondebosch 7701, South Africa;Department of Molecular and Cell BiologyUniversity of Cape Town, Rondebosch 7701, South Africa;Percy FitzPatrick Institute of African Ornithology Department of Science and Technology–National Research Foundation Centre of Excellence, University of Cape Town, Rondebosch 7701, South Africa;Percy FitzPatrick Institute of African Ornithology Department of Science and Technology–National Research Foundation Centre of Excellence, University of Cape Town, Rondebosch 7701, South AfricaCorrespondence;Wild Press P.O. Box 12-397, Wellington, New Zealand

关键词: Fishery bycatch;    Procellaria aequinoctialis;    genetic structure;    genetic diversity;    demographic impact.;   

DOI  :  10.3402/polar.v35.21150

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

The white-chinned petrel (Procellaria aequinoctialis) is the seabird species most frequently killed by fisheries in the Southern Ocean and is listed by the International Union for the Conservation of Nature and Natural Resources as globally vulnerable. It breeds around the sub-Antarctic, but genetic data identified two subspecies: P. a. aequinoctialis from islands in the Atlantic and Indian Oceans and P. a. steadi from the New Zealand sub-Antarctic islands. We identify the region of origin of birds killed by two long-line fisheries based on differences in the mitochondrial gene cytochrome b. All 113 birds killed off South Africa had the haplotype of P. a. aequinoctialis, whereas all the 60 birds from New Zealand had P. a. steadi haplotypes. The two subspecies of white-chinned petrels thus appear to disperse to different regions irrespective of their age, which accords with the tracking data of adult birds. Our finding has significant implications for managing the bycatch of this species by regional fisheries.

【 授权许可】

CC BY-NC