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Cryptic species in a Vulnerable seabird : short-tailed albatross consists of two species

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Title: Cryptic species in a Vulnerable seabird : short-tailed albatross consists of two species
Authors: Eda, Masaki Browse this author →KAKEN DB
Yamasaki, Takeshi Browse this author
Izumi, Hiroe Browse this author
Tomita, Naoki Browse this author
Konno, Satoshi Browse this author
Konno, Miwa Browse this author
Murakami, Hayao Browse this author
Sato, Fumio Browse this author
Keywords: Birds
Cryptic species
Short-tailed albatross
Threatened species
Issue Date: 25-Mar-2021
Publisher: Inter-Research
Journal Title: Endangered species research
Volume: 43
Start Page: 375
End Page: 386
Publisher DOI: 10.3354/esr01078
Abstract: The occurrence of cryptic species within a threatened taxon is rare, but where they do occur, understanding species boundaries is essential for planning an effective conservation strategy. The short-tailed albatross Phoebastria albatrus is a Vulnerable seabird that mainly breeds on Torishima and the Senkaku Islands in the western North Pacific. Although it has been tacitly regarded as a single management unit with 2 breeding sites, the species is known to comprise 2 genetically separated populations (Senkaku-type and Torishima-type). However, morphological examination of birds from both populations has not been conducted owing to the difficulty in accessing the Senkaku Islands. In this study, we examined the morphological differences between immigrants from the Senkaku Islands to Torishima (Senkaku-type) and native birds on Torishima (Torishima-type) and found significant differences in morphological characteristics between the 2 bird types. In general, Torishima-type birds were larger than Senkaku-type birds, whereas Senkaku-type birds had relatively longer beaks. Based on the morphological differences found in this study as well as genetic and ecological differences revealed in previous studies, we believe that Senkaku- and Torishima-type birds should be classified as different cryptic species. To the best of our knowledge, this is the first case of cryptic species being identified in a threatened avian species.
Type: article
Appears in Collections:総合博物館 (The Hokkaido University Museum) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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