作者: Daniel A. Cristol , Mitchell B. Baker , Chris Carbone
DOI: 10.1007/978-1-4757-4901-4_2
关键词: Population 、 Anser 、 Geography 、 Junco hyemalis 、 Range (biology) 、 Ecology
摘要: The annual migrations of birds are impressive phenomena that raise interesting physiological, evolutionary, and ecological questions. One facet migration has long intrigued biologists is the occurrence differential migration, in which distance traveled differs between portions a population. For example, eastern United States female Dark-eyed Juncos (Junco hyemalis) migrate farther into winter range than males (Ketterson Nolan, 1976), among Snow Geese (Anser caerulescens) blue-morph white-morph individuals separate longitudinally during (Cooke et al., 1975). (All common scientific names follow Sibley Monroe, 1990, can be found Tables I–III unless given text).