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Tag: "predators" at biology news

Study shows lizard moms dress their children for success

...the open and need stripes to help them escape from predators (the optical effect of stripes on fast-moving prey...pecially vulnerable to predators. As a result, the predators are likely to focus on them, giving a survival advantage to lizards with different patterns. Afte...

Marine phytoplankton changes form to protect itself from different predators

...an change form to protect itself against attack by predators that have very different feeding habits. To boost...y is to form colonies that are too large for those predators to consume. Lead author Jeremy D. Long, along with collaborators Gabriella W. Smalley, Todd Barsb...

Prey not hard-wired to fear predators

...ecies, including moose, caribou and elk, only fear predators they regularly encounter. If you take away wolves... all affected by both the loss and return of their predators in ways that are important for conservation and ecosystem integrity. These findings come at a t...

Mule deer moms rescue other fawns

...hey rely on fighting to protect themselves against predators year-round, while whitetails and many other species restrict aggressive defence to just the youngest fawns. Whitetails rely on flight rather than fight for most of their lives, so this may affect their ability to mount an aggressive defence," Lingle ...

Philandering female felines forgo fidelity

...d in low densities, due to competition from larger predators such as the lion and hyena. “Our study shows that more fathers are contributing to the next generation than we thought,” added Durant. “This is good news for cheetahs, and a reminder that future conservation strategies need to encompass large landsca...

Global survey of lizards reveals greater abundance of animals on islands than on mainland ecosystems

...Jetz and Buckley confirmed that reduced numbers of predators and competitors accompany high lizard densities on islands across the world. The two biologists concluded that an average acre of mainland contains 52 lizards while an island acre contains 777 lizards. This difference in density persisted when the ...

Why do oysters choose to live where they could be eaten?

...aggregations of a species serve as protection from predators and harsh environments or may be beneficial to future reproductive success. However, in the case of oyster larvae, the selection of a place to call home can be a life or death decision. According to an article in the May edition of Ecological Monogr...

Alien plants attack using 'resource conservation' as weapon, researchers say

...hods, such as weed-whacking or introducing natural predators of the invasive plants, said study co-author Peter Vitousek, professor of biological sciences at Stanford. To determine which species warrant action, some government agencies in several countries, including the U.S. National Park Service, maintain...

Scientists: As rainfall changes, tropical plants may acclimate

...h as those that hold sway over pollinators, insect predators or invasive plants. "These plants should be able to do OK in terms of their nitrogen nutrition, even with the climate changing," said Ted Schuur, a UF assistant professor of ecology and one of four authors of the paper. "But of course, we only stu...

Tracking sperm whales and jumbo squid

...es have been applied simultaneously to deep-diving predators and prey in the same waters. The research team in...) and jumbo squid (Dosidicus gigas) are both major predators that spend much of their lives in one of the world’s largest ecosystems, the mesopelagic zone [650 t...

Secret of worm's poison pill box protein could produce new natural insecticide

...ot only kills the target insect but prevents other predators from eating the body giving free reign to the nematode worms to consume it, multiply and move on. However, until now, researchers had little idea of the make up of XptA1 and thus how it worked. The research team, based at the University of Warwick’s...

New species declared: Clouded leopard on Borneo and Sumatra

...art of Borneo.? Clouded leopards are the biggest predators on Borneo. Some grow to be as large as a small pa... size of any cat. Sumatran tigers are the largest predators on Sumatra. Between 5,000 and 11,000 clouded leopards are estimated to live on Borneo. The total ...

Amur leopard still on the brink of extinction, scientists say

... 100 animals are needed. "Conservation of large predators needs vast territories with minimal anthropogenic changes, which is difficult," said Dr. Dmitry Pikunov, the coordinator of the 2007 leopard census and head of the laboratory of animal ecology and conservation of the Pacific Institute of Geography of...

Salamanders suffer delayed effects of common herbicide

...ans in general, are crucial to ecosystems, as both predators and prey. They can be seen as bioindicators of environmental stress and harbingers of risk to other animals as well as humans," explained Rohr, also affiliated with Penn State's Center for Infectious Disease Dynamics. ...

Baby fish 'smell their way home'

...differences, braving strong currents and ferocious predators in their 20 days at sea ?all when only a centimeter or so in size. "We tested several ideas, but the most attractive seemed to be that they could smell the unique trace of their home reef ?rather like salmon can smell the home river. "We know t...

Immunization rates hit record high in poor countries

...rom Japan and China, appears to have no successful predators in North America, some native fungi—like the one Costa and Grassano have growing on branches in their laboratory—kill the pest. Last December, Costa, Grassano, and two the other researchers, Vladimir Gouli and Jiancai Li, submitted a provisional p...

Fungal factories may save hemlock forests

...rom Japan and China, appears to have no successful predators in North America, some native fungi—like the one Costa and Grassano have growing on branches in their laboratory—kill the pest. Last December, Costa, Grassano, and two the other researchers, Vladimir Gouli and Jiancai Li, submitted a provisional p...

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

...logists have long predicted that the demise of top predators could trigger destructive consequences. Researchi...igh seas." "Maintaining the populations of top predators is critical for sustaining healthy oceanic ecosystems," says Peterson. "Despite the vastness of the...

Microbes compete with animals for food by making it stink

...atability," Hay said. "It could have been that the predators didn't smell the rotten fish, but that's not consi...arrion on the roadway. It could have been that the predators smelled it, but didn't want it." Counting the species found in the traps confirmed the level of at...

Theory of oscillations may explain biological mysteries

... such as those that include animals that eat other predators as well as omnivores that eat both predators and those predators?prey. ...

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