Sentences with phrase «number of prey»

This greatly overestimates potential predation, and leads them to conclude — erroneously — that the actual number of prey killed by cats was «3.3 times greater than the rate estimated from prey brought home,» [9] as was discussed previously.

Of course the errors are even more significant when one inflated figure is multiplied by another — as when Lepczyk et al. [6] multiply the average number of prey items returned by the average number of outdoor cats per owner.

And the scientists found that as soon as the pythons expanded into a new area, the number of prey animals there fell.

As a final measure of possible environmental influence, we assessed the rate of resource depletion through tool - assisted foraging by recording the number of prey items consumed during daily foraging events.

But the research development of the techniques to count prey and tigers and doing studies in different sites across India with high and low prey densities show very clearly that the number of tigers is linked to the number of prey in a very, very strong relationship.

When the number of prey increases — perhaps as their food supply becomes more abundant — predator populations also grow.

«When the number of prey was insufficient to satisfy them — they do eat a lot — they moved on to something else, and they did it in a sequential way.»

Scientists found that culling older, larger prey fish can lead to more small fish for predators to dine on, even though the overall number of prey decline

«the simple average number of animals brought home is not a useful measure of central tendency because of the skewed frequency distribution of the numbers of prey items brought home...» [2]

Barratt has suggested that «median numbers of prey estimated or observed to be caught per year are approximately half the mean values, and are a better representation of the average predation by house cats based on these data.»

«The distinction between compensatory and additive mortality does, however, become increasingly redundant as the number of birds killed in a given area increases: where large numbers of prey are killed, predators would probably be killing a combination of individuals with poor and good long - term survival chances.

``... median numbers of prey estimated or observed to be caught per year are approximately half the mean values, and are a better representation of the average predation by house cats based on these data.»

Not exact matches

Said Jeff Horne, director of threat research at Webroot: «A perfect storm is developing between the number of people flocking to social networks and the new, increasingly sophisticated malware attacks cybercriminals are launching to prey on the personal data they're sharing.»

The Bight's baby white sharks declined for a number of reasons, Lowe says: poor water quality, their decimation as gillnetting bycatch, and the near - extirpation of the prey that adult sharks rely on.

Behavioral finance theory identifies a number of behaviors that investors typically fall prey to.

When they have an opportunity they will certainly rise in rebellion, but inferiority in numbers and lack of arms make the Muslims an easy prey to the oppressors.

I can only hope that this attempt is taken more seriously than the largely muted and clearly unsuccessful protests of late last season... although the plane writing escapade brought some much - needed attention to the matter, it failed to resonate with fence - sitters and those who had just recently fell off the Wenger truck... without a big enough showing of support the whole endeavor appeared relatively weak and poorly organized, especially to the major media outlets, whose involvement could have significantly changed what was to follow... but I get it, few wanted to turn on their club, let alone make a public display of their discord... problem is, they are preying on that vulnerability, in fact, their counting on you to keep your thoughts to yourself... who are you to tell these fat cats how to steal your money... they have worked long and hard to pull the wool over your eyes... they even went so far as to pay enormous sums of cash to your once beloved professor to be their corporate spokesmodel so that the whole thing would be more palatable... eventually the club made it appear as if this was simply a relatively small fringe group of highly radicalized supporters, which allowed the pro-Wenger element inside the club hierarchy to claim victory following the FA Cup win... unfortunately what has happened to this club can't be solved by FA Cups or a few players coming in, the very culture of this club needs to be changed and that starts at the top... in order to change the unhealthy and dysfunctional narrative that has absorbed this club we need to remove everyone who presently occupies a position of power... only then can we get back to the business of playing championship caliber football, which should always be the number one priority of this organization... on an important side note, one of the most devastating mistakes made in the final days of this hectic and poorly planned transfer window didn't have to do with the big name players like Sanchez or Lemar, but the fact that they failed to secure Jadon Sancho, who might even start for Dortmund this season... I think they might seriously regret this oversight... instead of spending so much time, energy and manpower pretending that they were desperately trying to make big moves, they once again lost the plot due to their all too familiar tunnel vision

Exhibit Shines Light On Plight Of Migratory Birds - CBS Chicago - March 3, 2016 An exhibit aimed at bringing public awareness to the number of migrating birds that fall prey to skyscrapers and other buildings has opened at the Peggy Notebaert Nature MuseuOf Migratory Birds - CBS Chicago - March 3, 2016 An exhibit aimed at bringing public awareness to the number of migrating birds that fall prey to skyscrapers and other buildings has opened at the Peggy Notebaert Nature Museuof migrating birds that fall prey to skyscrapers and other buildings has opened at the Peggy Notebaert Nature Museum.

While mutinous slaves may not be able to save themselves, by rebelling they can reduce the number of slave masters who prey on nearby relatives.

Putting numbers on the athletic powers of wild predators and prey «enables you to understand the ecosystem» Wilson says.

However, if, as we showed, the scent is sufficient to continue population decline, then even if the predators move on to other prey, and their scent disappears, this is unimportant for the survival of the population that is at risk whose numbers and reproductive ability have been critically affected by the passing smell of death.»

When she's tired of pretending to stalk her prey, she can collapse into any number of sleeping spots to dream once again.

By the late 19th century, elephants in the area had been hunted away, causing grasslands to become overgrown woodlands and the number of ungulate prey to decline.

But overfishing has reduced the numbers of the fish the penguins once preferred, leaving krill as the birds» major prey.

Yet the buffet - style menu of the eastern coyote means that its numbers can remain steady or even rise without large prey if alternative food is abundant.

Because large carnivores regulate other predators and prey, exercising an influence on the ecosystem far out of proportion to their numbers, their protection and reintroduction is crucial.

Long - tailed macaques on an island in Thailand are doing such a good job of cracking shellfish with stone tools, they are driving down their prey's numbers and body size

Prey like moose and white - tailed deer are expanding in numbers and range because of logging and climate change, which in turn increases predator numbers (e.g. wolves).

Based on a peatland model developed at the University of York and latest climate change predictions, the researchers warn that by 2051 - 80 the dunlin could see a 50 % decline in numbers, with the golden plover down 30 % and the red grouse down by 15 %, all driven by declining abundance of the birds» crane fly prey.

For example, the removal of a large predator could allow a medium - sized predator to increase in numbers and eat its smaller mammal and bird prey into extinction.

In the arms race of life, a number of animals use venom as a weapon to paralyze prey and jump - start digestion.

Then their numbers declined drastically as they became victims of hunting, and loss of prey and habitat, and, starting in the late 1940s, use of the pesticide DDT — which thinned the eagles eggshells and prevented hatching.

Trophic cascades in which a top predator controls its herbivore prey via top - down forces will therefore always have an odd number of trophic levels.

The Venus» flytrap counts the number of times prey comes in contact with its sensory hairs to determine the size of the hapless insect, when to shut its leaves to trap the creature, and even how much digestive juice to produce for its meal.

«The plant can judge, by simply counting the number of action potentials spreading over the trap, whether useless dead material has landed inside it or if useful animal prey has been caught,» says Sönke Scherzer, an electrophysiologist at the University of Würzburg in Germany, and one of the study's co-authors.

We always held the number of species constant, but made changes to the roles each animal played as well as the links between predators and their prey.»

Researchers suggest that the effect of mothers» appetites may help prevent species going extinct, and help counteract the effect of large numbers within a population being preyed upon, such as during harvesting.

«A stable and healthy reef includes a high abundance and diversity of predatory fish and a relatively low number of herbivorous and small prey fish,» says study lead author April Boaden, a PhD student at the Coral CoE.

«This find means that, around 15 million years ago when there were a lot of large sperm whales with big teeth like Albicetus, it may have been a moment of peak richness in the number and diversity of marine mammals serving as prey to these whales,» Boersma suggests.

These strange entities are bacteriophages, viruses that prey upon bacteria, and there's a staggering number of them.

The tagged minkes also gulped down a remarkable number of mouthfuls of krill per dive compared with other baleen whales, which all catch prey using a behavior known as lunge feeding.

In cold, wet years, on the other hand, prey numbers plummet — forcing snakes to travel beyond their usual slithering grounds to eat — again increasing chances of an unlucky meeting.

While a mountain lion can become hungry at any time of the year, the animals would go longer and longer periods of time between making kills as the winter progressed through late spring, a time of the year when wild prey numbers are lowest.

But, by preying on a variety of reef fish species, lionfish are reducing the number of fish that clean algae off coral reefs, she said.

Biologists have proposed a number of ways that this uneasy partnership between predator and potential prey could remain happy for both parties.

After the number of breeding birds increased after the Second World War, the bird of prey is in trouble again.

Though the study included only a small number of sharks monitored over varying lengths of time, the findings may suggest that fish prey location may influence movements of their shark predators, and that group spawning events may shape ecosystem dynamics in deeper coral reefs.

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.

Specifically, tool use by the macaques significantly reduced the numbers and size of the prey, especially on islands that were home to larger populations of monkeys.

(b) Constant wetting increased the number of flying prey captured.