Foraging optimally for home ranges
نویسندگان
چکیده
منابع مشابه
Foraging optimally for home ranges
Economic models predict behavior of animals based on the presumption that natural selection has shaped behaviors important to an animal’s fitness to maximize benefits over costs. Economic analyses have shown that territories of animals are structured by trade-offs between benefits gained from resources and costs of defending them. Intuitively, home ranges should be similarly structured, but tra...
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We introduce the frugal foraging model in which a forager performs a discrete-time random walk on a lattice in which each site initially contains S food units. The forager metabolizes one unit of food at each step and starves to death when it last ate S steps in the past. Whenever the forager eats, it consumes all food at its current site and this site remains empty forever (no food replenishme...
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An intermediate spatiotemporal scale of food procurement by large herbivores is evident within annual or seasonal home ranges. It takes the form of settlement periods spanning several days or weeks during which foraging activity is confined to spatially discrete foraging arenas, separated by roaming interludes. Extended by areas occupied for other activities, these foraging arenas contribute to...
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Foraging home ranges of Black Brant Branta bernicla nigricans (n = 8) were quantified to determine proportional use of available intertidal habitat during spring migration stopover at Humboldt Bay, California, USA. The average foraging range area was 232 ha (s.d. ± 156 ha) of which 114 ha (s.d. ± 43 ha) was comprised of their primary food, eelgrass Zostera marina; the other habitats included mu...
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ژورنال
عنوان ژورنال: Journal of Mammalogy
سال: 2012
ISSN: 0022-2372,1545-1542
DOI: 10.1644/11-mamm-s-157.1