caa a22 4500 388051884 CHVBK 20180307125055.0 cr unu---uuuuu 161130e199809 xx s 000 0 eng 10.1017/S0959270900001891 doi S0959270900001891 pii (NATIONALLICENCE)cambridge-10.1017/S0959270900001891 Ryan Peter G. Percy FitzPatrick Institute, University of Cape Town, Rondebosch 7701, South Africa, e-mail: pryan@botzoo.uct.ac.za The taxonomic and conservation status of the Spectacled Petrel Procellaria conspicillata [Elektronische Daten] [Peter G. Ryan] The Spectacled Petrel Procellaria [aequinoctialis] conspicillata only breeds at Inaccessible Island, central South Atlantic Ocean. During the early 1980s the population was estimated to be at most 1,000 pairs, but hundreds of Spectacled Petrels have been killed annually in longline fisheries off the east coast of South America since at least 1987. Although the population is characterized by a unique plumage trait, it is still regarded as a subspecies of the White-chinned Petrel P. aequinoctialis. Analysis of calls and playback experiments show that the Spectacled Petrel is vocally distinct from White-chinned Petrels and should be regarded as a valid biological species. It is also slightly smaller and breeds earlier than the White-chinned Petrel. Given its small population size and known mortality on longlines, the Spectacled Petrel is Endangered in terms of IUCN criteria C1 and C2b. Longline fisheries operating off South America should institute measures to reduce seabird by-catch. A survey of the breeding population at Inaccessible Island is required to assess the rate at which the population is decreasing. Copyright © Birdlife International 1998 Bird Conservation International Cambridge University Press 8/3(1998-09), 223-235 0959-2709 8:3<223 1998 8 BCI https://doi.org/10.1017/S0959270900001891 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0959270900001891 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Ryan Peter G. Percy FitzPatrick Institute, University of Cape Town, Rondebosch 7701, South Africa, e-mail: pryan@botzoo.uct.ac.za NATIONALLICENCE 773 0- Bird Conservation International Cambridge University Press 8/3(1998-09), 223-235 0959-2709 8:3<223 1998 8 BCI CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge