Seasonal Migration
Abstract Seasonal migrations involve movements among two or more areas that are occupied in different seasons during the annual cycle. Classically these are migrations to one location for breeding and to another for the remainder of the year. Annual migrations of birds like those of the arctic tern...
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| Format: | Book Part |
| Language: | English |
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Oxford University PressNew York, NY
1996
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| Online Access: | http://dx.doi.org/10.1093/oso/9780195089622.003.0010 https://academic.oup.com/book/chapter-pdf/52410685/isbn-9780195089622-book-part-10.pdf |
| Summary: | Abstract Seasonal migrations involve movements among two or more areas that are occupied in different seasons during the annual cycle. Classically these are migrations to one location for breeding and to another for the remainder of the year. Annual migrations of birds like those of the arctic tern and the swift parrot outlined in Chapter 3 are fairly typical examples and illustrate the extremes of distances traveled. Such to-and-fro movements are not limited to birds, but occur also in organisms as diverse as whales and butterflies. It is also the case that seasonal movements can be among more than two places. The movements of wildebeest between three different parts of the Serengeti region of East Africa (Chapter 3), and the numerous cases of circuits to at least three areas of ocean-for breeding, nurturing of young, and adult feeding-in many marine fishes (Harden Jones, 1968; Dingle 1980) are good examples of multipartite migratory cycles. In these examples we see already some of the variability present in seasonal movements. This theme of variability and its significance will pervade the discussion in this chapter. |
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