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Latest Population ecology Stories

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2010-03-29 10:15:00

The American bee population continues to decline, leaving experts wondering why. According to U.S. Department of Agriculture statistics, the number of beehives decreased for the third consecutive year in 2009. The beehive numbers fell by 29-percent last year, following declines of 36-percent in 2008 and 32-percent in 2007. Scientists in other countries have noticed similar results and have taken to calling the results "colony collapse disorder." David Mendes, president of the American...

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2010-03-01 15:39:37

Challenges evidence that global warming was the cause Scientists broadly agree that global warming may threaten the survival of many plant and animal species; but global warming did not kill the Monteverde golden toad, an often cited example of climate-triggered extinction, says a new study. The toad vanished from Costa Rica's Pacific coastal-mountain cloud forest in the late 1980s, the apparent victim of a pathogen outbreak that has wiped out dozens of other amphibians in the Americas. Many...

2010-02-22 15:16:00

NORTH HOLLYWOOD, Calif., Feb. 22 /PRNewswire-USNewswire/ -- Actors and Others for Animals, a Los Angeles based animal welfare organization dedicated to ending the pet overpopulation problem, will provide spay/neuter surgeries for 400 cats of Los Angeles County residents free of charge as part of the 16th Annual Spay Day. Spay Day is an annual campaign of The Humane Society of the United States and Humane Society International to inspire people to save animals' lives by spaying or...

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2009-11-20 07:40:00

Most countries throughout the world participate in the $40-million-per-year culinary trade of frog legs in some way, with 75 percent of frog legs consumed in France, Belgium and the United States. Scientists at the Smithsonian Institution and colleagues have found that this trade is a potential carrier of pathogens deadly to amphibians. The team's findings are published in the scientific journal Frontiers in Ecology, Thursday, Nov. 19. Amphibians are rapidly declining worldwide. More than...

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2009-10-03 09:44:55

Diversity of fish in East African lakes points to mechanism for evolution of sex chromosomes Biologists have genetically mapped the sex chromosomes of several species of cichlid fish from Lake Malawi, East Africa, and identified a mechanism by which new sex chromosomes may evolve. In research published in this week's issue of the journal Science, biologists Thomas Kocher, Reade Roberts and Jennifer Ser of the University of Maryland describe the genetic basis for two co-existing systems of...

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2009-09-23 07:08:03

Sometimes to see something properly, you have to stand farther back. This is true of Chuck Close portraits where a patchwork of many small faces changes into one giant face as you back away. It may also be true of the frogs of Central America, where the pattern of extinctions emerges clearly only at a certain spatial scale. Everyone knows that frogs are in trouble and that some species have disappeared, but a recent analysis of Central American frog surveys shows the situation is worse than...

2009-07-23 09:32:15

In the animal kingdom, everything is not as it seems. Individuals of the same species can look very different from each other - what biologists term 'polymorphism.' Sometimes the number of distinct visible forms - 'exuberant polymorphisms' -- in a single animal population can reach double figures. But why?Scientists at the University of York have developed computer models that may help to explain how this level of variation arises and persists. Their research is reported in the latest issue...

2009-07-08 15:22:00

LOS ANGELES, July 8 /PRNewswire/ -- Social Compassion in Legislation (SCIL), a California-based nonprofit organization focused on reducing pet overpopulation through legislation, today reported that the total number of euthanasia of cats and dogs entering California municipal shelters increased 14.6 percent statewide - from 378,445 to 433,512 -between 2004 to 2008 based on recently released figures from the California Department of Public Health (CDPH). In addition, the total yearly number of...

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2009-06-05 14:10:00

Experts warned Congress on Thursday that a mysterious fungus attacking America's bats represents the most serious threat to wildlife in a century and could spread nationwide within years. The condition, known as white-nose syndrome, gets its name from the white fungus speckled amongst the bats, reports the Associated Press. Experts told two House subcommittees on Thursday about discovering caves where bats had been decimated by the disease. "One cave there was turned into a morgue, with bats...

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2009-05-02 11:20:00

A fungus, which has reportedly already killed an estimated 500,000 bats, is causing the U.S. Forest Service to close thousands of caves and former mines in national forests in 33 states in an attempt to control the problem. The problem was first noticed in New York and after two years had spread to caves in both Virginia and West Virginia. 99% of the bats infected have died. While there is no reason to believe the fungus poses a threat to humans, bats have been dying at a startling rate from...