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Predation in Medical News

Scientists find mercury threatens next generation of loons

...me 14 percent less time at the nest than normally behaving birds. Unattended nests have a higher rate of failure due to either chilling of the eggs or predation by minks, otters, raccoons and other egg robbers. With behavioral observations from 1,529 loon territories between 1996 and 2005, researchers foun...

Predators do more than kill prey

...are the only fish present; and killifish from high predation localities, below these waterfalls, where the kill...e way killifish evolved: Killifish from high predation environments are younger at maturity and produce m..., plus produce more babies. Killifish from high predation environments gained more from high rations an ind...

Minister Calls for Action Plan To Solve Man-Animal Conflict

...r for leopards that facilitates their existence close to human beings and thus escalates the conflict. Such conflicts result in livestock depredation, predation on domestic dogs and killing and mauling of human beings. Perhaps, the most unfortunate part of the whole thing is the fear, dislike and the wider soc...

Early Man Was A Prey Rather Than A Predator

... prey rather than a predator, "In fact, all diurnal primates (those active during the day) live in permanent social groups. Most ecologists agree that predation pressure is one of the major adaptive reasons for this group living. In this way there are more eyes and ears to locate the predators and more individ...

Marine Reserves Protect Coral Reefs

...terestingly, once parrotfish reach a length of around 28 cm, they become too big for even the largest grouper to swallow. This 'escape' from a risk of predation means that most reserves are unlikely to reduce the amount of grazing even after the number of predators rises. "Diving in the Exuma Cays Land ...
Predation in Biological News

Study sheds new light on dolphin coordination during predation

CORVALLIS, Ore. Spinner dolphins have long been known for their teamwork in capturing prey but a new study using high-tech acoustics has found that their synchronization is even more complex than scientists realized and likely evolved as a strategy to maximize their energy intake. The study, b...

Cougar predation key to ecosystem health

The general disappearance of cougars from a portion of Zion National Park in the past 70 years has allowed deer populations to dramatically increase, leading to severe ecological damage, loss of cottonwood trees, eroding streambanks, and declining biodiversity. This "trophic cascade" of environme...

Insect predation sheds light on food web recovery after the dinosaur extinction

The recovery of biodiversity after the end-Cretaceous mass extinction was much more chaotic than previously thought, according to paleontologists. New fossil evidence shows that at certain times and places, plant and insect diversity were severely out of balance, not linked as they are today. The e...

Scientists find universal rules for food-web stability

...dator-prey links are less likely to be stable, while a strong dependence of predation on predator density destabilizes the system. On the other hand, a strong dependence of predation on prey density has a stabilizing impact on food webs. Differences betw...

Scary ancient spiders revealed in 3-D models, thanks to new imaging technique

...uild a picture of what was happening during this period early in the history of life on land. We think one creature could have responded to increasing predation from the amphibians by growing spikes, while the other responded by becoming an ambush predator, hiding away and only exposing itself when it had to c...

UBC researchers find first-ever 'wanderlust gene' in tiny bony fish

...tion we've identified may also shed light on why there's still a small but constant population of armour-less sticklebacks in the sea despite the high predation there. Sticklebacks with the mutant allele just like to go to new places." ...

Animal and plant communication at the ESA Annual Meeting

...ight be more adept at camouflaging themselves by finding the best places to hide or to blend in. Singer's experiment is the first to quantify bird predation on specialist and generalist herbivores, and he hopes it will spark further research. He says that the interactions among the three trophic levels pl...

Bizarre walking bat has ancient heritage

...s Dr Hand. "This study shows that, contrary to existing hypotheses, bats are not overwhelmingly absent from the ground because of competition from, or predation by, other mammals. "Unlike for birds, there is currently no evidence that any bat has evolved a reduced capacity for flight as a result of isolatio...

Noise pollution negatively affects woodland bird communities, says CU-Boulder study

... black-chinned hummingbirds and of other species was due to lower levels of predation by a major nemesis of the birds -- the western scrub jay -- which was shown...ant of noise and nested in quiet areas were subject to greater rate of nest predation than those in noisy areas, he said. Woodland birds that prefer noisy areas ...

Wolf reintroduction proposed in Scottish Highland test case

... the populations of grazing animals, but also their behavior. The threat of predation and attack can fundamentally change the movement and activities of grazing ...nd essentially the same animal as elk in the United States have not faced predation or fear such as that for 250 years. Deer densities in that country are now ...
Predation in Biological Technology

Researchers Document Rapid, Dramatic 'Reverse Evolution' in the Threespine Stickleback Fish

...is reverse evolution in the sticklebacks is from the higher levels of trout predation after the sudden increase in water transparency," said Peichel, whose Hutch...ity of the fish to quickly adapt to environmental changes such as increased predation by the cutthroat trout is due, Peichel believes, to their rich genetic vari...
Predation in Biological Definition

Parthenogenesis

...nia reproduces by parthenogenesis in the spring to rapidly populate ponds, then switches to sexual reproduction as the intensity of competition and predation increases. Parthenogenesis Parthenogenesis is a particular form of asexual reproduction in which females produce eggs that develop without...

Vacuole

...of toxic byproducts from cell metabolism . Storage of pigments (e.g., red and blue pigments in flowers ). Protection of the plant tissue from predation by storing toxic compounds. Contributing to cell growth by absorbing water (e.g., cell elongation). Allowing some plant cells to reach considerab...
Predation in Biological Dictionary

Predation

In ecology, predation describes a biological interaction where a predator feeds on its prey, . Predators may or may not kill their prey prior to feeding on them, but the act of predation always results in the death of the... predation n. The act or practice of plundering or marauding. ... ...

Mutualism

...ical ... Shop for Biology of Mutualism and Books at Shop.com. The view of nature as red in tooth and claw'' as a jungle in which competition and predation are the predominant... ...

Herbivores

... Herbivory is a form of predation in which an organism, known as a herbivore, consumes principally autotrophs such as plants, algae and photosynthesizing bacteria. By that definit...

Carnivores

... its energy and nutrient requirements from a diet consisting mainly or exclusively of vertebrate and/or invertebrate animal tissue, whether through predation or... Phylogeny of the Carnivores " ... The Morphological Diversification of Carnivores in North America" ... Categories: Carni...

Carnivore

... its energy and nutrient requirements from a diet consisting mainly or exclusively of vertebrate and/or invertebrate animal tissue, whether through predation or... Carnivore was a system implemented by the Federal Bureau of Investigation that was designed to monitor email and electronic communications...
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