Sentences with phrase «predation studies»

We only included mainland and large island (New Zealand and United Kingdom) predation studies, because cat predation on small islands is often exceptionally high36, 37 and focused on colony nesting seabirds38.

Although few predation studies have examined the hunting behavior of cats belonging to managed colonies, those that have are revealing.

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

In journal article after journal article, and book after book, I found cat - predation studies that were flawed by small sample size, samples that were not shown to be typical, unjustified generalizations, a failure to account for confounding factors, and a tendency to assume that predation of individual birds necessarily resulted in damage to bird populations at the species level.

Predation Studies What caught my eye was not the u in neighbourhoods, but ABC's claim that: «Studies show that outdoor cats make up 13 — 45 percent of coyote diets in those environments.»

In their review of 61 predation studies, Mike Fitzgerald and Dennis Turner are unambiguous:

Jessup cites some well - known predation studies, but his concern is not the (presumed) impact on wildlife, per se, but rather the wholesale condemnation of «trap, neuter, and reabandon,» [9] as he calls it.

Indeed, in their contribution to The Domestic Cat: The Biology of Its Behaviour, researchers Mike Fitzgerald and Dennis Turner thoroughly reviewed 61 predation studies, concluding rather unambiguously that «there are few, if any studies apart from island ones that actually demonstrate that cats have reduced bird populations.»

In a joint media release, the American Bird Conservancy and The Wildlife Society team up to misrepresent the results of a recent predation study, decrying the «ongoing slaughter of wildlife by outdoor cats.»

Not exact matches

From ecologists, we learned cannibalism was often an important part of predation and foraging, while social scientists studied its relationship to courtship, mating and even parental care.

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.

Alessio Mortelliti will study how seed predation may affect the successful dispersal of trees and shrubs and may limit their ability to expand into northern habitats in response to climate change.

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.

«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.

To study the effect of helper - young ratios without varying the ability of a meerkat family to protect against predation or forage widely, the researchers either kidnapped pups or added them to groups in the wild.

He studied analyses of previous reef extinctions and accrued more and more evidence of the effects of changing sea levels, temperature stresses, predation by crown - of - thorns starfish and human - influenced changes in nutrient levels.

«This is the first illustration that the spiders could also use the chemical cues to try to decrease the predation rate and also increase the attraction of prey,» says I - Min Tso of Tunghai University in Taiwan, who wasn't involved in the study.

Other studies have found remains of Steller sea lions and other marine mammals in the stomachs of sleeper sharks, but those could have been the result of scavenging instead of predation, Horning pointed out.

«Predation, or the action of attacking one's prey, is a significant factor in evolution; this discovery is extremely important in the study of how organisms evolved in the Cambrian Period,» Schiffbauer said.

Focusing on just one aspect of lawlessness — sexual predation — the study has found that twice to three times as many sexual predators are flocking to the boom towns as to nearby tourist, ranching and farming communities.

Some researchers recommend that trophic cascades studies incorporate radio - collar data to measure behavioral predation risk (i.e., wolf presence).

«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.

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

In future, more studies are needed under different predation scenarios to answer why synchronous emergence evolved in animals, and what factors influence timing.

The GPS collars delivered highly accurate locations of the study animals (via satellites or cell towers) so the researchers were able to visit these locations during winter to investigate their activities and document predation patterns.

The authors do not believe the viability of moose populations in central Ontario is negatively affected by this predation, as recent studies have shown that populations in WMU49 and nearby Algonquin Provincial Park are increasing and that both adult and calf moose survival is relatively high.

As their hunting behavior shifts from ice to land, the polar bears «have progressively arrived earlier and earlier to have access to more eggs,» says biologist Børge Moe, another principal author of the study who works at the Norwegian Institute for Nature Research in Kongsfjorden, where seabird egg predation is just beginning to increase.

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

Studies of habitat use and associated trade - offs of predation risk and foraging opportunities in fishes and crustaceans using mathematical models, physical sampling, and active hydroacoustics.

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].

On Friday, December 8, 2017, Linda DeLibero — Director, Film and Media Studies, Johns Hopkins University — and Christopher Llewellyn Reed (that's me)-- Chair and Professor, Department of Film & Moving Image, Stevenson University — joined Dan Rodricks on his Baltimore Sun podcast, «Roughly Speaking,» to discuss the following topics: the ongoing revelations of sexual predation and harassment in both Hollywood and the political realm; what's currently getting Oscar buzz; what is currently out in cinemas that we recommend (including Coco, The Disaster Artist, Lady Bird and the upcoming The Shape of Water); and highlights from the careers of actor Claude Rains (1889 - 1976) and film composer Ennio Morricone (1928 ---RRB-, both of whose birthdays are on November 10, when we originally planned to celebrate them (a podcast we had to cancel for various reasons).

The report drags out retired data from the bogus cat - versus - bird debate — such as the predation numbers from the discredited Wisconsin study — to justify illegally shooting cats.

This Australian study looked at predation rates among owned cats over a two - year period when wearing the Birdbesafe collar cover.

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.

This study found that many cat owners overestimate their cats» predation rates.

And Castillo and Clarke (though highly critical of TNR) actually documented remarkably little predation in the two Florida parks they used for their study.

Marra and his colleagues extrapolated findings from 21 studies in the U.S. and Europe to come up with an estimate of 30 million to 80 million «unowned» cats and 84 million «owned» cats in the U.S., their kill rates, and other factors leading to bird predation.

According to their brochure, Domestic Cat Predation on Birds and Other Wildlife (PDF), «extensive studies of the feeding habits of domestic, free - roaming cats... show that approximately... 20 to 30 percent [of their diet] are birds.»

The main determining factor was predation, which accounted for 79 percent of juvenile catbird deaths within the team's three suburban study sites.

Wayne Pacelle, president and CEO of The Humane Society of the United States, issued the following statement in response to the study published in Nature Communications by scientists from the Smithsonian Conservation Biology Institute and the U.S. Fish and Wildlife Service on cat predation:

The Humane Society Veterinary Medical Association issued the following statement from its senior veterinary medical advisor, Barry Kellogg, VMD, in response to a study on cat predation by the Smithsonian Conservation Biology Institute and the U.S. Fish and Wildlife Service.

But the studies done by wildlife biologists on cat predation are, I'm sorry, lousy.

Instead, he dismissed the «rarity» of cat predation in the study (by which I think he means the «non-existence» or «near non-existence» of cat predation in the study) by opining that it was due to the presence of coyotes in the area.

This study by Environment Canada scientist Peter Blancher was designed to create a credible estimate of the rates of bird predation by cats, identify information...

TNR can neither eliminate feral cats, nor reduce predation, and does not address illness or disease, facts supported by actual scientific study.

Recently I began studying the science of the cat - predation issue.

[11](USFWS misrepresents this, too, in its Predator Management Plan, once again omitting the number of mortalities: «Free - roaming domestic cat predation accounted for 50 percent of adult Lower Keys marsh rabbit mortality during radio telemetry studies...» [9]-RRB-

Counting Cats and Counting Birds In both studies, the authors quantified the impact of cat predation on bird populations by comparing different levels of predation with different bird densities.

«It's impressive that cats can take them down,» McRuer said of the kestrel, adding that few previous studies have documented the number of species affected by cat predation.

So, what Baker et al. are suggesting is that predation by cats may be extensive enough to deplete populations of certain bird species at their study site, such that at least some of the birds observed there were immigrants from nearby habitat.