Sexual dimorphism and sex-differential migration of Little Buntings(Emberiza pusilla)at an East Asian stopover site

作     者：Sook-Young Cho Hyun-Young Nam Se-Young Park Chang-Yong Choi Sook-Young Cho;Hyun-Young Nam;Se-Young Park;Chang-Yong Choi

作者机构：Bird Research CenterKorea National Park Research InstituteJeonnam58863Republic of Korea Division of ZoologyHonam National Institute of Biological ResourcesMokpo58762Republic of Korea School of Biological SciencesCollege of Natural SciencesSeoul National UniversitySeoul08826Republic of Korea Department of AgricultureForestry and BioresourcesCollege of Agriculture and Life SciencesSeoul National UniversitySeoul08826Republic of Korea 

出 版 物：《Avian Research》 (鸟类学研究（英文版）)

年 卷 期：2022年第13卷第1期

页      面：87-93页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 0713[理学-生态学] 

基　　金：supported by the New Faculty Startup Fund from Seoul National University (Grant No.500-20200268) supported by the National Research Foundation of Korea (NRF) grants funded by the Republic of Korea Government (Ministry of Education NRF2018R1D1A1B07050135 & NRF-2019R1I1A1A01063760) 

主　　题：Digital photography Emberiza pusilla Little Bunting Protandrous migration Sexual dichromatism Sexual dimorphism 

摘      要：Sex differences in morphology provide key information for understanding a species morphological adaptations in relation to the evolution of sexual *** migratory birds,morphological traits have adapted to long-distance travel,and sexual dimorphism is typically related to sex-differential migration *** Buntings(Emberiza pusilla)have one of the longest migrations and are the least dichromatic species among the Emberiza *** this study,we measured sexual size dimorphism and sexual dichromatism of Little Buntings in relation to the spring arrival dates at a stopover site in *** length was the most important predictor for identifying sex;the wings of males were longer than those of *** also had a significantly stronger chestnut color of the head feathers than females,but this color difference was more prominent in the spring than in the *** arrived earlier than females by four *** dates correlated with both size and color,but unlike other bunting species previously studied in the same area,there was no clear sex-differential trend in the relationship between arrival date and morphological *** differences in the degree of sexual dichromatism suggest that chestnut plumage coloration can be used as a social or sexual signal of males in the breeding *** correlation of size and color to early arrival regardless of sex may indicate that a preference for assortative mating exists or that a sex-differential migration strategy is not clearly defined in the early stages of northward *** findings on the sexual dimorphism of Little Buntings provide insight into the evolution of the sex-differential migration of buntings in the East Asian Flyway.