Latest Population ecology Stories

2010-05-24 08:26:19

In nature, ultraviolet radiation from sunlight is not the amphibian killer scientists once suspected. Naturally occurring murky water and females who choose to lay their eggs in the shade keep embryos of one of the nation's most UV-sensitive amphibian species out of harm's way most of the time, new research shows. Less than 2 percent of the embryos of the long-toed salamander received lethal doses of UV across 22 breeding sites across nearly 8 square miles (20 square kilometers) in Washington...

2010-05-14 08:42:17

According to a new study by a Quebec research team, there are strong correlations between dog breeds' typical personalities, how long they live, and how much food they eat. Through domestication, humans unwittingly initiated an artificial selection experiment on personality. We know that breeders selected individual dogs for reproduction based not only on physical appearance but also on specific behavioral traits - such as activity, aggressiveness, and docility - to shape each breed to a...

2010-04-26 13:45:00

WASHINGTON, April 26 /PRNewswire-USNewswire/ -- In 1978, a joint congressional resolution established Asian/Pacific American Heritage Week. The first 10 days of May were chosen to coincide with two important milestones in Asian/Pacific American history: the arrival in the United States of the first Japanese immigrants (May 7, 1843) and contributions of Chinese workers to the building of the transcontinental railroad, completed on May 10, 1869. In 1992, Congress expanded the observance to a...

2010-04-08 13:02:00

Californians for Population Stabilization will participate in Earth Day events Santa Barbara - Saturday, April 17 in Alameda Park San Diego - Sunday, April 18 in Balboa Park SANTA BARBARA, Calif., April 8 /PRNewswire-USNewswire/ -- Forty years have passed since the first Earth Day, but the primary issue--an ever-increasing human population making demands on a finite supply of natural resources--remains the same. That is the message from Californians for Population Stabilization (CAPS), a...

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...

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...

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...

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...

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...

Word of the Day
  • A beast of burden; also, a beast in general.
'Jument' ultimately comes from the Latin 'jugum,' yoke.