Tag: "carnivores" at biology news
Prey not hard-wired to fear predators
...ic agencies increase efforts to re-introduce large carnivores
to places where they have been exterminated. Berg...c agencies by restoring ecosystems to bring native carnivores
back to where they once thrived. said Dr. Berger. Bergers study, which looked at 19 areas includin...
Alien predators are more dangerous than native predators
...pacts than some classic predators, including large carnivores
such as wolves. Case study: foxes and the brush-tailed bettong In the early 1800s, Australias brush-tailed bettong - a medium-sized kangaroo-like marsupial - was commonplace in central New South Wales, South Australia and the southern regions o...
Despite their heft, many dinosaurs had surprisingly tiny genomes
...e National Institutes of Health. "The theropods -- carnivores
such as Tyrannosaurus rex and Velociraptor -- had very small genomes, in the range of modern birds. Ornithischians -- which include Stegosaurus and Triceratops -- had more moderately sized genomes, akin to those of living lizards and crocodilians. We...
Why are lions not as big as elephants?
...n large vertebrate prey near their own mass. While carnivores
around the size of a lynx or larger can obtain hig...tionship might have led to the extinction of large carnivores
in the past and why our largest modern mammalian carnivores
are so threatened. The authors provid...
Dental crowns reveal the diet of a species
...vegetables in its diet. For instance, the teeth of carnivores
and rodents differ in almost every aspect, but if ... size, number, occlusion and dental crown cusps of carnivores
and rodents, such as cats and mice, are very different. Based on their research, the Helsinki scient...
A buffet for early human relatives
...nment," Cerling says. "We cannot tell if they were carnivores
or scavengers, but it is possible their diet included animals. We are picking up that signal." The new study was led by Matt Sponheimer, a former University of Utah postdoctoral fellow and now an assistant professor of anthropology at the Universi...
USGS at The Wildlife Society: From sea-ice change to contaminants to predators and prey
...note): Wolves, cougars, grizzly bears and other carnivores
are returning to much of the United States where they have not lived for decades. Thus studies of predators and their prey are taking on a new significance. Do predators control their prey? What determines predator numbers? Do predators tend to kill ...
Tyrannosaur survivorship -- tough times for teens
...l help us to unravel the cause of death of so many carnivores
at one location. "It's also surprising that something like this study has never been done before." For decades, scientists believed dinosaurs were bigger versions of living reptiles but this new research, published in the current issue of Scienc...
Gigantic meat-eating dinosaur discovered
... information about the social lives of the largest carnivores
on Earth. And its one of the most remarkable of a dozen new species discoveries, many of them gigantic, in the last decade from this region of western Patagonia," says dinosaur enthusiast and dig participant, "Dino" Don Lessem, one of several excavat...
Subsidized killing of carnivores fails to protect US sheep industry
... Although coyotes account for 75-to-95 percent of carnivores
killed annually, mountain lions, bobcats, wolves, ...grizzly bears are also removed. The perception of carnivores
as widespread livestock killers represents a major challenge to their conservation worldwide. Berger...
Study explores which carnivores are most likely to kill other carnivores
...ecognized the importance of interspecific killing carnivores
in determining ecology and behavior. A new study by Emiliano Donadio and Steven W. Buskirk (Univers...
Report lists top 20 most-vulnerable African carnivores
...vation status of the 20 largest species of African carnivores
and examined priorities to help ensure that they persist on the continent. WCS scientists ranked all 20 species using a variety of external factors, from the state of current knowledge on the species, to the threats facing each of them. They also loo...
Study in Royal Society journal on possiblity of human organ regeneration
...robeck and Dr. RMR Barclay (rspb.2005.3246) Large carnivores
have a difficult time co-existing with people throughout the world. The persistence of several remnant grizzly bear populations in the continental USA depends on their being naturally connected to bears in Canada. Here, we report on a study of grizzl...
Bronx Zoo bears are new Samsonite gorillas
...d strength of the grizzly bear, one of the largest carnivores
in the world, means the container provides more-than-adequate protection from the black bear, the grizzly bear's smaller cousin. Unlike grizzly bears, which are found in only a handful of locations in the lower 48 states, black bears occur throughout...
Wolves' top-down effect
...and subsequently recovered. Bears and other large carnivores
were never completely extirpated. In addition, the researchers traced elk deaths in the high-wolf area to wolves, which also supports the major role wolves have in this trophic cascade. "Our study findings strongly bolster the use of conservation an...
Killer dinosaurs turned vegetarian
... to represent an intermediate stage between deadly carnivores
and later, plant-eating therizinosaurs. Falcarius is anatomically more primitive than the Chinese therizinosaurs. The therizinosaurs are maniraptorans. Birds evolved from maniraptorans, a group that includes sharp-clawed meat-eaters such as Utahrap...
Why are coyotes getting more aggressive?
.... Fearful of being hunted and trapped, these large carnivores
have typically stayed in wooded areas and away from humans. But now that coyotes have started foraging in suburban areas, more research is needed to find out why and how to prevent potential conflicts with people. Curtis and his colleagues are launch...
Researchers find new giant amphibian fossils in Africa
... Nature , describe the first and oldest amphibious carnivores
from the Republic of Niger in West Africa. "This the first evidence of carnivores
in this area," says McGill paleontologist, and co-author, Hans Larsson. "This find is particularly i...
Wolves gone, western ecosystems suffer
...at www.cof.orst.edu/wolves "The ranges of large carnivores
are continuing to collapse around the world," the ...the lower 48 states, although populations of these carnivores
have been increasing in recent years. Growing evidence points to the importance of conserving these...
Endurance running may be key to evolution of human body form
...estors to compete for food with speedy four-legged carnivores
and greatly shaping the distinctive human body for...der for our direct ancestors to compete with other carnivores
for access to the protein needed to grow the big brains that we enjoy today." Protein and fat der...