Sentences with phrase «cat densities»

With this increase in cat density, the incidence of cat flu is also increasing.

Forty of these species are often present in urban or suburban landscapes, where impacts of high cat densities on bird populations have been demonstrated elsewhere.

Hence, trapping effort needed to be greatly intensified at low cat densities and / or augmented by other methods of control to eradicate cats from the closed system of the reserve.

Human - inhabited areas and known TNR (trap - neuter - release) colonies are shown because of the higher cat densities observed near those areas.

Similarly, if we extrapolate the range of feral cat densities generated from trapping (0.3 — 0.8 km − 2) to the entire island (194 km2), estimates of the interior feral cat population size ranged from 58 (0.3 km − 2) to 155 (0.8 km − 2) cats.

Feral cat densities estimated from 2004 island - wide stratified trap efforts on Catalina Island.

It may be, suggest Sims et al., that, because high cat density corresponds closely to high housing density, this measure is also an indication of those areas «where humans provide more supplementary food for birds.»

The use of poison baits can reduce cat density, but even low levels of cat predation can exterminate threatened mammal populations, such as when cats killed at least seven bilbies reintroduced outside the Arid Recovery reserve in South Australia.

Mean predation rates within each square each season were multiplied by cat density to estimate the total number killed, and summed across seasons to estimate the number killed annually.

Filled areas represent bands of different cat densities, on the basis of the number of captures in different trap lines (see text for procedure used to estimate area sampled for determination of densities).

The study also looked at what causes variation in cat densities.

The functional response for cat trapping (the offtake with constant effort per unit time) overlaid against the curve of cat productivity suggested a stable equilibrium point at low cat densities (0.07 — 0.13 cats km — 2).

The higher cat densities observed near some developed areas may be spillover from overcrowded conditions associated with TNR colonies and unsterilized pets, which may affect native prey populations in areas immediately adjacent to colonies.

Cat densities are higher on islands, especially smaller islands.

Inland areas with low rainfall and more open vegetation had higher cat densities than most coastal, wetter areas, but only after extensive rain.

In a worrying finding for conservation managers, cat densities were found to be the same both inside and outside conservation reserves, such as National Parks, showing that declaring protected areas alone is not enough to safeguard our native wildlife.

When targeted and large enough scale, TNR also decreases shelter intake in areas of high cat density.

When targeted and at a large enough scale, TNR also decreases shelter intake in areas of high cat density.

However, the effort required to maintain a given offtake rate increased 6-fold at low cat densities and offtake by trapping as a function of cat density took the form of a Type 3 functional response.

They note that further extended studies are needed, especially in large urbanized areas with varied habitat types, cat densities and prey availability.

It's difficult enough to show a direct link between observed predation and population impacts; suggesting a causal connection between high cat densities and declining bird populations is misleading and irresponsible.

In North America Coleman and Temple (1996) developed estimates of cat densities in Wisconsin and associated mortality of 8 — 217 million birds per year.

Legge also found that «cat densities were the same both inside and outside conservation reserves, such as national parks,» despite several decades of all - out efforts to eradicate feral cats from protected habitat.

Because home ranges of sterilized cats did not overlap more than those of intact cats, sterilization alone would not necessarily lead to an increase in cat densities.

Cat densities from targeted trapping (0.8 ± 0.4 cats / km2) were higher than those for island - wide efforts (0.3 ± 0.1 cats / km2).

The west end of the island, which supports several camps and yacht clubs, also had high cat densities (0.5 / km2), although estimated densities near Two Harbors (0.1 — 0.2 cats / km2), the location of several TNR colonies, were surprisingly low.