Sentences with word «predation»

Nelson, S.H., Evans, A.D., and Bradbury, R.B., «The efficacy of collar - mounted devices in reducing the rate of predation of wildlife by domestic cats.»

USFWS also acknowledges that «the exact extent [of predation by cats] can not be determined,» though they imply that it must be increasing: «the number of cats present in the Lower Keys has increased over the past 20 years with the increase in the residential population.»

Olfaction, hearing, learning, activity levels and lateralization are all impaired in reef fish larvae reared at near - future CO2 levels, leading to changes in settlement patterns and higher rates of mortality from predation in natural coral - reef habitat.

«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.»

After excluding studies that did not meet a priori inclusion criteria designed to increase the accuracy of our analysis, we developed probability distributions of predation rates on birds and mammals.

Walker notes that catios protect wildlife from predation by cats, but the structures also ensure that cats are protected from hazards such as traffic, dogs, other cats and wildlife that might like to eat cats, such as coyotes and mountain lions.

Linking snake habitat use to nest predation risk in grassland birds: the dangers of shrub cover.

The same confusion leads many Christians to see sexual predation as bad because it involves sex rather than because it is predatory.

Said Legge, «Our study highlights the scale and impact of feral cats,» logically at about 10 % the rate Hunt earlier projected, or even as little as 2 %, adjusting for predation rates in the realm of actual cat hunting behavior, «and the urgent need,» Legge continued, «to develop effective control methods, and to target our efforts in areas where control will produce the biggest gains.»

Biologists also have used the studies from Marra, Temple, and a number of others to estimate the total U.S. death toll for birds due to cat predation as more than a billion per year.

«African animals were adapted to human predation pressure after 2 million years of hunting, but South American mammals had no previous experience of human hunting,» Fiedel explains.

These numbers are far too low to have any meaningful impact on the daily risk of disease, injury, or wildlife predation by cats.

«Researcher studies increased predation of sagebrush songbirds in natural gas fields.»

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).

[13] Again, one flaw is compounded by another, resulting in grossly inflated predation estimates.

Their genomic features also lead us to propose that one method used to avoid predation by viruses and / or bacterivores is by means of slow growth and the maintenance of low biomass.

In the news release, Robert Reed, a survey herpetologist and author of the report, said: «These giant snakes threaten to destabilize some of our most precious ecosystems and parks, primarily through predation on vulnerable native species.»

Hall, C, Fontaine, J, Bryant, K, Calver, M. (2015) Assessing the effectiveness of the Birdsbesafe ® anti-predation collar cover in reducing predation on wildlife by pet cats in Western Australia..

Porter also is interested in seeing whether oxygen played a role in predation levels through time.

Of the many cat predation studies I've read, only a few [2, 10, 11] properly account for the skewed nature of this distribution.

[13][14] In 2004, there were 38 San Miguel island foxes, all in captivity; 46 foxes in captivity on Santa Rosa Island and 7 in the wild (golden eagle predation prevented the release of captive foxes into the wild); Santa Cruz Island had 25 captive foxes and a stable wild population of around 100 foxes.

In Colombia, WCS published two contributions related to the idenification, verification and management of human - Andean bear conflicts: «Guide for the Landscape Diagnostic of Human - Andean Bear Conflicts,» and the «Manual for the Recognition and Evaluation of Livestock Predation Events by Wild Carnivores.»

Wolves are actually good for them economically: they make a small profit via set aside funds if one kills one of their cows, wolf predation makes local deer healthier, and out of town visitors to the mountains love the sound of wolf howls.

This armour would have perhaps peaked some 400 million years ago in now - extinct jawless vertebrate species, as protection against predation by ferocious sea scorpions, or even their early jawed kin.

«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.

Next, I'll discuss the difference between compensatory and additive predation, and how that affects predictions of feral cat impacts on wildlife.

«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.»

Research about predation risk has the potential to inform human choices about which landscapes can be allowed to harbor dangerous animals.

Wildlife Predation Issues «Cats are,» according to HAHF, «recognized as a widespread and serious threat to the integrity of native wildlife populations and natural ecosystems.»

Empirical evidence, for example, showsthat fox predation accounts for only a very small proportion of lamb losses, and has a negligible financial impact.

Ranchers have been especially vocal in opposing protection for the wolves, which they say are to blame for increased livestock predation as well as the decline in the region's elk herds in recent years.

The rise of predation at this time put large, sedentary Ediacaran animals at a big disadvantage.

Surprisingly, the birds» parents don't seem to defend them, perhaps because such predation does not happen often enough for them to have evolved a defence response.

They marked them and identified them on nest cameras to get a better idea of the impact of fox predation.

More recently, Dauphiné and Cooper use the inflated predation rate suggested by Lepczyk et al. (along with rates proposed by other researchers) to arrive at their «billion birds» figure.

Seed predation includes any process inflicted on a plant's seeds by an animal that results in the inviability of the seed.

«Cat predation upon birds and wildlife is a serious matter to us,» he says.

According to the bible, a storm free and predation free nature system should return after the earth gets back to a paradise status (this required an «event» again, called armageddon)

In addition, a global theory of killer whale predation depends on educated — and far - flung — guesses of how many marine mammals may have been killed by orcas over a set period of time.

In a geologic «instant» of several million years, organisms developed strikingly new body shapes, new organs, and new predation strategies and defenses against them.

Purely compensatory predation, on the other hand, is less likely to affect overall populations.

The threat of predation makes the blenny fish seek refuge outside of water, where they are safer, perhaps retracing steps of first land - dwelling animals

Some dog breeds (such as Great Pyrenees and others), and even llamas and donkeys, effectively defend against coyote predation of herds of sheep, for example.

The difference in the seals» survival rates could be a result of an increase in shark predation within the reserve.

An expert on sustainable exploitation, he says that even though humans may take more fish than any one predator, their haul makes up only 40 % of total natural predation on fish.

Furthermore, the question of whether cats are bad for birds at the population level involves a lot more than simple predation numbers.