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Sexual size dimorphism in the critically endangered Seychelles Scops Owl Otus insularis

Currie, D. and Mateman, A.C. and Lessells, C.M. and Fanchette, R. (2002) Sexual size dimorphism in the critically endangered Seychelles Scops Owl Otus insularis. Ringing and Migration, 21, 16-18. ISSN 0307-8698.

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Official URL: http://dx.doi.org/10.1080/03078698.2002.9674272

Abstract

The Seychelles Scops Owl Otus insularis is a critically endangered species restricted to the forests of Mahé in the Republic of Seychelles, Western Indian Ocean. This study presents the first biometric data collected from live individuals and investigates the occurence of sexual size dimorphism. Thirty-one birds were measured, and 30 of these were sexed by molecular analysis of their DNA: 6 females and 24 males. Females were generally heavier and larger than males. There was some variation in plumage colouration, which was unrelated to sex, but no evidence of distinct colour morphs as has been documented in other Western Indian Ocean Otus species.

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:11131
Deposited On:24 Nov 2011 01:00
Last Modified:15 Jan 2014 09:31

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