Sentences with phrase «with predation»

We excluded studies from outside temperate regions and those with predation rate estimates based on fewer than 10 cats, < 1 month of sampling, or on cats that were experimentally manipulated (for example, by fitting them with bells or behaviour altering bibs).

Latitude was positively correlated with the predation of rabbits and negatively with the predation of reptiles and invertebrates.

Distance from landmass was positively correlated with predation on birds and negatively correlated with the predation of reptiles.

Therefore they have not evolved the characteristics needed to deal with this predation.

In their new Conservation Genetics paper, the researchers say, «Past gene flow also suggests that human - assisted gene flow is necessary to conserve the ecosystem services associated with predation, since climate warming has reduced the frequency of ice bridges and with it the only opportunity for unassisted gene flow.

It enabled predation and grazing to play roles equally important to resources or habitat, with predation having the key role for some populations and resources having the dominant role in others.

In their model herbivory is greatest in relatively unproductive environments, with predation more important and the impact of herbivory reduced as ecosystem productivity increases.

Yet Idaho wildlife officials say habitat destruction and fragmentation linked to human activities are the greatest threats to the sage - grouse, with predation ranking 12 among 19 factors that contribute to the bird's decline.

Not exact matches

«Harvey Weinstein's decades - long campaign of sexual predation — with the newest allegations of assault coming from actress Dominique Huett and Weinstein's former production assistant Mimi Haleyi — reveals that secrets are often deployed by the powerful as a tool to maintain control.

Predation is part of the way nature functions and humans are indeed part of nature, but there is something wrong with the form of predation that is inherent in unbridled economic or social competition amonPredation is part of the way nature functions and humans are indeed part of nature, but there is something wrong with the form of predation that is inherent in unbridled economic or social competition amonpredation that is inherent in unbridled economic or social competition among humans.

That being said, anthropology proves storms and predation existed before «paradise» was set up about 6000 years ago so a self sustain nature setup obviously existed long before the so called «paradise with Adam and Eve».

With the help of the electric fence, we have almost eliminated the threat of predation by coyotes, which had been quite a problem in years past.

So I guess at the end of the day the best way to protect against online predation is to have an ongoing dialog with your children so that they understand that they can not share too much information and that in fact they have their privacy settings set in such a way that nobody can access any of their online profiles unless they are known to them and they are a real friend.

It's how they interact with each other -LCB- predation / eating, competition, symbiosis, etc. -RCB- and how they interact with their non-living environment.

Momentum is growing in the push to protect dedicated MTA funds from Albany's predations, but with only one month left in the legislative session, time is ticking.

Not only are native males wasting their time trying to mate with a different species, they are also at high risk of predation for their efforts.

«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.»

«The results suggest that the biochemistry of the microbes remains the same with warmer temperature, but that predation and death become more important.

«Jellyfishes are ancient organisms, which use a primitive predation mechanism based on generating feeding currents to bring the prey into contact with their bodies,» Acuña explains.

«We collected baby fish from each type of lake or reservoir and transferred them to a protected location with no anglers and no predation from larger fish,» Hessenauer says.

A suite of animals that evolved in Eurasia, Australia and the Americas without the risk of predation from tool - using, fire - making, group - living hominids were suddenly faced with a new threat.

Ecologist John Orrock, who studies how animals balance the need to protect themselves from predation with other needs, such as eating and mating, hatched the idea for this research when he was studying snails in a California grassland.

Although prey that had been unfamiliar with dangerous predators for as few as 50 to 130 years were highly vulnerable to initial encounters, behavioral adjustments to reduce predation transpired within a single generation.

«With our results of a negative relationship between predation pressure and longevity that is largely independent of other key life history traits we were able to confirm the universality of the 50 year old evolutionary theory of aging on a broad geographical scale» concludes Mihai Valcu, first author of the study.

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.

According to a new theory of predation — published late last year in the Proceedings of the National Academy of Sciences (PNAS)-- humans sharply reduced the orcas» main source of food in the 1950s with the postwar explosion of industrial whaling.

But predation, even with bears included, didn't explain elk's low pregnancy rates.

Our recently published paper attributing the pinniped declines to killer - whale predation provides an alternative hypothesis that we believe is more consistent with the available data.

In the animal world, strict rules are followed to deal with sources of contamination and potential dangers such as predation.

«It's a conundrum when you think about it, killing one native species to help others... but today it's become necessary to do so,» says Blaine Parker, avian predation coordinator for Columbia River Inter-Tribal Fish Commission, which represents four Native American tribes with fishing rights along the river.

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.

Still others, such as conservation biologist Michael Soulé, believe that top - down versus bottom - up, like all dualisms, is false, because the natural world is complex and bottom - up forces (nutrient flow) interact with top - down forces (the effects of predation).

We also fed the predators in these compartments with larvae so that they produced chemical signals indicative of predation which could be detected by the larvae in the experiment,» Orizaola explains.

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.

In the presence of spiders with glued mouths, grasshoppers nevertheless reduced their feeding time and preferentially ate forbs, which provide greater cover and safety from predation.

«The Laboratory of Behavioral Ecology and Evolution, together with collaborators from other disciplines at Seoul National University, is focusing now at the spotted lanternflies» display behaviour that helps these insects to avoid predation,» comment Piotr Jablonski and Sang - Im Lee, the co-authors of the study.

The researchers believe the red squirrels acquired defenses against predation, such as better tree - climbing skills, as they coevolved with the pine marten, giving them a leg up on their non-native competition.

© Rowan McGinleyMcGinley and Taylor utilised video playback techniques, which have previously been used with jumping spiders to study aspects of courtship and predation.

Small changes in an organism's metabolic performance can have major consequences for its success in its natural habitat, where it is in competition with other species and faces losses from predation or viral infection.

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.

Large males with larger embryos invested more energy per embryo than smaller males, produced more newborn offspring, and their offspring survived predation better as compared to the offspring from small males.

«With a refined and tenacious tactic of predation, the European squid (Loligo vulgaris) has captured a bream (Sparus aurata) launching its tentacles and applying a lethal bite in the prey column.

In an average year, Boersma and her fellow researchers discovered that 65 % of all chicks died, with most from starvation, predation, and disease.

In this respect, the spectrum of species in Lake Victoria is now similar to that found in Lake Tanganyika or in marine habitats, where fish with pharyngeal jaws have existed alongside competitors without such jaws for up to 60 million years and have therefore never become specialized for predation on large fish.

And when this process occasionally goes a bit mad, and ever bigger or brasher becomes synonymous with ever better, then the object of female fixation undergoes runaway selection until physiology or predation steps in to set limits.

The number of animals with tough shells and exoskeletons exploded around 540 million years ago in the early Cambrian, probably in response to a rise in predation at the time.

On the other hand, populations of newly evolved species successful enough to grow and expand rapidly must eventually crash or slow down, as any species uses up available resources and interact with others that seek to take advantage of their increased numbers through predation or parasitism instead of symbiosis.

First, we conducted growth trials at five temperatures crossed with two levels of predation risk (fish predator present versus absent) and measured growth rates, consumption rates, assimilation efficiencies, and production efficiencies of 107 individual damselflies.

A related concept, the mesopredator release hypothesis, predicts that the removal of apex predators leads to the irruption of mesopredators with concomitant declines in the abundances of their prey owing to elevated rates of predation by mesopredators [10].

Thus, frequent interaction with humans and reduced predation are likely the most important factors that distinguish the study population from sympatric commensal house mouse populations [16].