Animal Dispersal

Name: Animal Dispersal
Brand: Springer
SKU: 9789401050333
Price: 824.3 RON
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Small mammals as a model

Autor: W. Z. Lidicker, N. C. Stenseth

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Editura: Springer

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4.1.1 Demographic significance Confined populations grow more rapidly than populations from which di...

Informații despre carte

Autor

W. Z. Lidicker, N. C. Stenseth

Limbă

engleză

Legare

Carte - Carte broșată

Publicat

2012

Pagini

365

EAN

9789401050333

ISBN

9401050333

Enbook ID

06877261

Editura

Springer

Greutate

587

Dimensiuni

155 x 235 x 21

Descriere completă

4.1.1 Demographic significance Confined populations grow more rapidly than populations from which dispersal is permitted (Lidicker, 1975; Krebs, 1979; Tamarin et at., 1984), and demography in island populations where dispersal is restricted differs greatly from nearby mainland populations (Lidicker, 1973; Tamarin, 1977, 1978; Gliwicz, 1980), clearly demonstrating the demographic signi ficance of dispersal. The prevalence of dispersal in rapidly expanding populations is held to be the best evidence for presaturation dispersal. Because dispersal reduces the growth rate of source populations, it is generally believed that emigration is not balanced by immigration, and that mortality of emigrants occurs as a result of movement into a 'sink' of unfavourable habitat. If such dispersal is age- or sex-biased, the demo graphy of the population is markedly affected, as a consequence of differ ences in mortality in the dispersive sex or age class. Habitat heterogeneity consequently underlies this interpretation of dispersal and its demographic consequences, although the spatial variability of environments is rarely assessed in dispersal studies.

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Animal Dispersal

Small mammals as a model

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