Sentences with phrase «of predation pressure»

One prey item is adapted to high predation pressure and supports the predator population (i.e. pigs), whereas the other prey item (i.e. the island fox) is poorly adapted to predation and declines as a consequence of the predation pressure.

Bringing together the observed macaque behavior and environmental conditions, we interpret the variation seen in macaque stone tool selection and shellfish characteristics on Koram and NomSao Islands as the result of a feedback loop driven by the level of predation pressure.

Not exact matches

«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.

This may necessitate greater dispersal for the male hybrids pushing them out of range of female hybrids and exposing them to greater predation pressure.

«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.

The intense predation pressure, which could be as high as 80 per cent among birds in habitats where the mourner lives seems to have driven the evolution of complex anti-predatory strategies in the species.

Their relatively small size would have meant that choristoderes were probably exposed to high predation pressure and strategies, such as live birth, and post-natal parental care may have improved survival of the offspring.

The inverse correlation between the number of tool - using macaques, prey size and availability, suggests that predation pressure may be the primary cause of shellfish body size and population on these islands.

Plant defenses increase survival and / or reproduction (fitness) of plants under pressure of predation from herbivores.

Eight of these coded for wing color patterning, a trait important for mating and avoiding predation, and under intense selection pressure, while the other four remain undescribed.

What any of this has to do with «predation pressure on native wildlife,» however, remains an open question.

[14 — 17] Actually, Nico Dauphiné and Robert J. Cooper take its already - tenuous claims one step further, citing Hawkins» work (actually a 2004 conference paper that summarizes his dissertation [18]-RRB- as evidence that «the continuous predation pressure exerted by exotic predators in exponentially high densities can and has resulted in numerous local extinctions of continental land birds.»

[22] The high predation pressure has clear impacts on the demography and life history of crabeater seals, and has likely had an important role in shaping social behaviors, including aggregation of subadults.

This usually happens when the reef is under some other kind of pressure, such as human predation or pollution.