Do harvest refuges buffer kangaroos against evolutionary responses to selective harvesting?

Tenhumberg, B., Tyre, A. J., Pople, A. R. and Possingham, H. P. (2004) Do harvest refuges buffer kangaroos against evolutionary responses to selective harvesting?. Ecology, 85 7: 2003-2017. doi:10.1890/03-4111

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Author Tenhumberg, B.
Tyre, A. J.
Pople, A. R.
Possingham, H. P.
Title Do harvest refuges buffer kangaroos against evolutionary responses to selective harvesting?
Journal name Ecology   Check publisher's open access policy
ISSN 0012-9658
1939-9170
Publication date 2004
Sub-type Article (original research)
DOI 10.1890/03-4111
Open Access Status File (Publisher version)
Volume 85
Issue 7
Start page 2003
End page 2017
Total pages 15
Editor R.K. Peet
Place of publication Washington, DC, United States
Publisher Ecological Society of America
Collection year 2004
Language eng
Abstract There is a wealth of literature documenting a directional change of body size in heavily harvested populations. Most of this work concentrates on aquatic systems, but terrestrial populations are equally at risk. This paper explores the capacity of harvest refuges to counteract potential effects of size-selective harvesting on the allele frequency,of populations. We constructed a stochastic, individual-based model parameterized with data on red kangaroos. Because we do not know which part of individual growth would change in the course of natural selection, we explored the effects of two alternative models of individual growth in which alleles affect either the growth rate or the maximum size. The model results show that size-selective harvesting can result in significantly smaller kangaroos for a given age when the entire population is subject to harvesting. In contrast, in scenarios that include dispersal from harvest refuges, the initial allele frequency remains virtually unchanged.
Keyword Ecology
Body Size
Environmental Stochasticity
Genetic Effects
Harvest Refuge
Individual-based Model
Kangaroo
Macropus Rufus
Size-selective Harvesting
New-south-wales
Western Grey Kangaroos
Sympatric Red Kangaroos
Life-history Evolution
Macropus-rufus
Habitat Fragmentation
Population-dynamics
Natural-selection
Reef Fishes
Reproduction
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 02:58:52 EST