Sentences with phrase «predation risk»

The phrase "predation risk" refers to the danger or threat of being hunted and eaten by a predator. Full definition
According to Douglas Smith, leader of the Yellowstone Gray Wolf Restoration Project, the concept of predation risk eludes easy definition.
Linking snake habitat use to nest predation risk in grassland birds: the dangers of shrub cover.
Most carcasses and the greatest amount of wolf sign, such as tracks and scat, occurred in thick forests, debris, ravines, and riverbanks, which I had characterized as high predation risk sites.
«At least some predators seem to be attracted by bird feeders and the food resource they provide, and in some cases this can lead to increased nest predation risk for native backyard breeding birds.»
We measured and evaluated how temperature and predation risk affected growth rates of predaceous damselfly nymphs (Enallagma vesperum, Odonata: Coenagrionidae).
For example, an area where wolves take down prey after a long chase may not necessarily be the site of greatest predation risk.
In Banff National Park, landscape ecologist Mark Hebblewhite found predation risk lowest in small groups of elk, with groups larger than twenty - five having the highest probability of being preyed upon by wolves, possibly because they are more likely to contain weak or sick individuals and are easier for predators to detect.
Higher metabolic and survival costs induced by predation risk were only partially offset by changes in consumption rates and assimilation efficiencies and the magnitude of non-consumptive effects varied as a function of temperature.
Marshall suggests that it also emphasizes the importance of considering broader environmental contexts, such as predation risk, as well as the perceptual abilities of natural observers like predators in studies of animal behavior.
I was also measuring predation risk, to see whether wolves and other predators influence elk movements by causing them to avoid areas with escape impediments, such as downed wood and thick brush.
Predation risk likely does cause some birds to form leks, agrees behavioral ecologist Jacob Höglund of Uppsala University in Sweden, but it is probably only one of many factors involved.
Research about predation risk has the potential to inform human choices about which landscapes can be allowed to harbor dangerous animals.
On landscapes with both open and closed habitat structure, they may use a combined strategy of hiding in forest cover to lower predator encounter rates and seeking open terrain, such as grasslands, where predation risk may be reduced.
Some researchers recommend that trophic cascades studies incorporate radio - collar data to measure behavioral predation risk (i.e., wolf presence).
Carr's comments struck a chord; just three weeks earlier, following the publication of «Perceived Predation Risk Reduces the Number of Offspring Songbirds Produce per Year» in Science, I was unable to get co-authors Liana Zanette and Michael Clinchy to «engage.»
«On the island with the lower risk this kind of background choice, to improve their level of camouflage, is much less evident than on the island with high predation risk
Their results imply that males, but not females, pay a high cost when using color to communicate with other damselflies, both in terms of predation risk and visibility to prey.
Landscape ecologist Matthew Kauffman and colleagues found that open areas enable wolves to detect prey more easily and thus present greater predation risk.
«On the one hand, you could see that the food might be attracting predators to certain areas, and that could increase nest predation risk.
Under predation risk, growth rates were lower and the shape of the thermal response was less apparent.
Furthermore, we documented that thermal physiology was mediated by predation risk, a known driver of organismal physiology that occurs in the context of species interactions.
Vigilance and predation risk in Gunnison's prairie dogs.
Second, we used a model to evaluate if and how component physiological responses to predation risk affected growth rates across temperatures.
Stankowich et al. used natural history data, including range overlap with potential predators, body size, and activity patterns, in conjunction with comparative phylogenetic analyses on 181 species of mammals to identify patterns of predation risk that could have contributed to the evolution of these two defensive strategies.
Because elk and other ungulates have poor vision, obstacles to their viewshed may not play a significant role in the dynamics of predation risk.
Elk have a sophisticated response to predation risk that includes gathering in larger groups in open areas.
One minute the dead elk wasn't there and the next minute it was, having met death in an area I had moments earlier characterized as having very high predation risk.
Fear of predation involves a response to predation risk, whereby prey react to predator presence — or even to the mere threat of it.
In Yellowstone, ecologist William Ripple developed his predation risk hypothesis while sitting on a high terrace in the Lamar Valley, where he noticed patchy willow growth.
And that could perhaps lessen nest predation risk
colorful traits are therefore subject to opposing selection pressures: positive sexual selection by conspecifics (increased mating success) and negative natural selection by predators (higher predation risk) and prey (lowered hunting success).
This implies that males, but not females, pay a high cost when they use color to communicate with other damselflies, both in terms of predation risk and visibility to prey.
Third, they estimated the predation risk in natural populations by quantifying the predated wings from bird feeding stations, and found that more males than females were consumed.
Predation risk would now likely be greater for sage - grouse eggs and young, and correspondingly lower for adult sage - grouse and other prey species.
The ASN Presidential Award for the paper that best fulfills the goals of the ASN in the American Naturalist during 2015 is «The Evolution of Foraging Rate across Local and Geographic Gradients in Predation Risk and Competition» by Mark C. Urban and Jonathan L. Richardson
«The evolution of foraging rate across local and geographic gradients in predation risk and competition.»
a b c d e f g h i j k l m n o p q r s t u v w x y z