Sentences with phrase «native predators»

Second, free - roaming cats can compete with native predators for prey.

In the past, deer numbers were relatively low, held in check by native predators such as black bears, mountain lions, and red wolves.

Also, guard dogs must be large enough to look after themselves in case they come face - to - face with native predators.

The observations and experiments of the research show that the green crab has filled the void left by the decline of native predators of sesarma crabs, the authors said.

Dan, I believe you are factually wrong about cats never making a bird species extinct, particularly on remote islands where native predator species were few.

More recently, Guttilla and Stapp seem to prefer Jessup's take: «Human - subsidized cats... can spill over into less densely populated wildland areas where they reduce prey for native predators (George 1974).»

For Jessup — who offers no additional evidence — it's all very straightforward: «Feral cats also indirectly kill native predators by removing their food base.»

«Since cats are not native predators in this part of the world, nesting North American birds have no natural defences against the agile tree climbers.

Instead, we should actively manage nature, interfering when necessary — by reintroducing native predators, moving species under threat, or even embracing invaders — to buttress important ecosystems and preserve diversity.

«Caribbean's native predators unable to stop aggressive lionfish population growth.»

Understanding exactly how native predators adapt to toads is a big part of TEAM BUFO's program of research.

involves experimental studies to test the feasibility of teaching native predators to leave toads alone rather than try to eat them.

Although many native predators can eat toads without dying, most of those species — including birds, rodents, snakes, etc. — really don't seem to enjoy having toads for lunch, so basically eat very few of them.

Her work showed that cane toads are especially vulnerable to one of the common native predators that occurs at Fogg Dam (and indeed, is common over most of Australia); that these predators already kill thousands of small toads every year; and that there are simple ways to make these predators even more effective as toad - control officers.

And lastly, encouraging native predators (like meat ants and water beetles) that help to control cane toads seems especially simple and low - risk.

We routinely protect non-native species from native predators — consider, for example, the current controversy over livestock and wolves.

On islands and in fragmented urban and suburban habitats unnaturally high densities of cats are not only capable of reducing or eradicating populations of birds and small mammals, they can out - compete native predators like foxes and weasels.

When cats are sheltered and fed by people, they can exist at densities up to 100 times higher than similarly sized native predators.

North American birds, reptiles and small mammals have coexisted with native predators long enough to evolve defensive strategies, but have not been exposed to domestic cats long enough to evolve defense.

Gregory Andrews, the Australian government's threatened species commissioner, said: «Native predator reintroduction is identified as a science - based means of recovering mammals and birds in Australia's threatened species strategy.

Golden eagles, feral pigs and island carnivores: how exotic species turn native predators into prey.

``... conserve and restore federally - listed species and protect all native fauna and flora on the [refuges] from population decline and potential extirpation or extinction due to predation by non-native species and human - subsidized populations of native predators.»

Finally, the return of feral cats to the wild must be balanced against the impacts these cats can have on wildlife, including on threatened and endangered species, habitats, and food sources for native predators.»

Aboriginal burning promotes fine - scale pyrodiversity and native predators in Australia's Western Desert

In the United States alone, the value of pest control by native predators is estimated at $ 4.5 billion annually.

Recreational fishing and crabbing on Cape Cod have removed most of the native predators that used to eat a common native species called the purple marsh crab (Sesarma reticulatum).

Moreover, native predators and parasites can also play a key role in pest management.

Their results indicate there is no relationship between the density of lionfish and that of native predators, suggesting that, «interactions with native predators do not influence» the number of lionfish in those areas, the study said.

The «teacher toads» may well kill some native predators (if the predator is too small and the toad is too big, or the predator is really sensitive to toad poisons)- this is a shame, but these are the animals doomed to die anyway as soon as the toad front arrives.

We know that toads kill lots of native predators that try to eat the toxic invaders, but can not tolerate the toads» poisons.

Mr Kelly warned that using a native predator to control an imported predator sounded appealing, but said caution was needed, a view backed by Mr Hunt.

With people feeding these non-native predators, they have an unnatural advantage in nature, and are thus appearing at frequency rates 10 - 100 times greater than nature would allow (prey animals in a balanced ecosystem greatly outnumber the native predators).

The loss of native predators and fur - bearers, especially foxes, enabled feral cats to expand into some habitat that cats could no longer hold after coyotes emigrated into the void left by the loss of foxes, while the collapse of the market for trapped fox fur enabled the relatively few surviving foxes to breed back up to the diminished carrying capacity of the New England habitat.

There were, however, some native predators left at large, even if Forbush and his informants never saw or killed them.

Conservationists are increasingly looking at options to «rewild» parts of Australia with native predators to arrest the country's precipitous decline in wildlife.

Some of us revere the return of a native predator, and others worry for their small pets, poultry and personal safety.

Parasites from wild rabbits and exposure to our native predator species such as coyotes, hawks, owls, and snakes make for an unsuitable habitat for domesticated rabbits.

Human - subsidized cats can reach densities exceeding several hundred cats / km2 (Liberg et al. 2000), and individuals can spill over into less densely populated wildland areas where they reduce prey for native predators (George 1974).

In the United States and Europe, with their much more robust sets of native predators, feral cats rarely flourish unless they are being fed by people.

[FN55] Domestic cats hunt many of the same animals that native predators do, and when present in large numbers, cats can reduce the availability of prey for native predators.

Therefore, cat populations in the wild reach artificially high numbers and present a serious threat to native predators» ability to feed themselves and their young.