A practical guide to avoid giving up on giving-up densities

A Bioenergetics Approach to Setting Conservation Objectives for Non-Breeding Shorebirds in California’s Central Valley

“…Similarly, a concentration of molting birds in one area or a pulse of migrating birds passing through could cause energy availability to be depleted in those areas more quickly. In addition, shorebirds may abandon available habitat once prey availability is reduced below a certain density (Bedoya-Perez et al 2013). Further, if some of the available habitat during any time-step is located far away from the majority of available habitat, shorebirds may not locate it or may require more energy to reach it.…”

The dilemma of foraging herbivores: dealing with food and fear

“…In this case, experiments that test the responses of generalist and specialist herbivores to cues of predation risk may instead be useful. Giving-up-density (GUD) experiments reveal the population level landscape of fear (Brown 1988) but making meaningful comparisons between species can be problematic, not least because equivalent GUD can occur for different reasons (Bedoya-Perez et al 2013). An alternative or complementary approach may be to obtain realistic measures to quantify what animals are feeling physiologically on a moment to moment basis as they forage through their natural world.…”

Too much of a good thing? A landscape-of-fear analysis for collared peccaries (Pecari tajacu) reveals hikers act as a greater deterrent than thorny or bitter food

“…Bedoya-Perez et al 2013), using foraging in artificial diminishing-returns food patches to measure the risk associated with the physical location of the patch as it interacts with costs of foraging (injury, ease of finding food etc.) at that location (Brown 1988).…”