Chinese Journal of Nature ›› 2014, Vol. 36 ›› Issue (3): 182-185.

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New advance on study of animal behavior(X): habitat selection

SHANG Yu-chang   

  1. Professor, School of Life Sciences, Peking University, Beijing 100871, China
  • Received:2014-04-03 Online:2014-06-25 Published:2014-06-25

Abstract: I briefly introduce the importance of habitat to animals and animals’ habitat selection behavior, the reason of animal dispersal and migration, the origin and evolution history of animals’ migration. An animal’s preferred habitat to be the one where its breeding success is the greatest. Steve Fretwell used game theory to develop ideal free distribution theory. This theory enables behaviorist to predict what animals should do when they choose between alternative habitats of different quality. The ideal free distribution lead to the fitness of animals in choose superior habitat or in lower-ranked habitat is consistent. Dispersal by juvenile animals reduces the chance of inbreeding, which often affects fitness negatively. When two closely related individuals mate, the offspring they produce are more likely to carry damaging recessive alleles in a double dose than the offspring produced by unrelated individuals. Migration typically involves movement away from and subsequent return to the same location on an annual basis migration apparently also occurred in some extinct dinosaurs and is seen today in many
mammals, fishes, sea turtles, and even some insects. Short-range migration preceded long-distance migration. Thus, long-distance migrants are probably descended from species that moves far less on an annual basis. Migratory species evolved from tropical non-migratory ancestors.