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uromys caudimaculata

Journal of Tropical Ecology (1)

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Intraspecific variation in seed size affects scatterhoarding behaviour of an Australian tropical rain-forest rodent
Tad C. Theimer
Journal:

Journal of Tropical Ecology / Volume 19 / Issue 1 / January 2003

Published online by Cambridge University Press:

10 January 2003, pp. 95-98
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Vertebrate seed dispersers could impact the evolution of seed size or alter the pattern of seedling recruitment if they responded differently to seeds of varying size (Jordano 1995). For example, models of seed caching by birds and mammals predict that seeds of higher nutritive value should be placed farther from parent trees and in lower densities than lower quality seeds (Clarkson et al. 1986, Stapanian & Smith 1978, Tamura et al. 1999). Comparisons of seed removal rates among tropical tree species in South-East Asia (Blate et al. 1998) and Australia (Osunkoya 1994) failed to show a relationship between seed size and removal rate, although the probability that a seed was scatterhoarded by agoutis (Dasyprocta punctata) in a neotropical rain forest increased with interspecific seed size (Forget et al. 1998).