Posted on 08/24/2006 6:57:50 AM PDT by presidio9
The icecap may not be the only thing shrinking in the Arctic. The genitals of polar bears in east Greenland are apparently dwindling in size due to industrial pollutants.
Scientists report this shrinkage could, in the worst case scenario, endanger polar bears there and elsewhere by spoiling their love lives and causing their numbers to peter out.
In fact, all marine mammals could get affected by these pollutants, "especially the Arctic fox, killer whale and pilot whales," wildlife veterinarian and toxicologist Christian Sonne at the National Environmental Research Institute of Denmark in Roskilde told LiveScience. These animals bodies also carry extremely high levels of these contaminants.
Polar bears from northernmost Norway, western Russia and east Greenland are among the most polluted animals in the Arctic, as they feast on ringed seals and bearded seals. The blubber of these seals accumulates high levels of organic pollutants loaded with halogens such as chlorine. These organohalogens can act like hormones.
Sonne and his colleagues looked at formaldehyde-preserved genitals from 55 male and 44 female east Greenland polar bears, collected from 1999 to 2002 by about 30 polar bear subsistence hunters regulated by the Greenland government.
Harrowing expedition
The researchers experienced harrowing times on their expeditions with dog sleds into the wilds of Greenland to study polar bears.
"One evening a bear came just next to us in the night when we were doing the toilette," Sonne recalled. "They shot and it ran." Another time, "we almost had to eat the dogs as we ran out of food and seals. It was cold sleeping in -50 degrees C [-58 Fahrenheit] in five weeks with no heater."
The adult polar bear testicles the researchers examined were on average roughly three inches across and 1.8 ounces in weight, although they could dramatically enlarge during the height of sexual activity from January to July. Their bacula, or penis bones, were on average nearly seven inches long.
The scientists found the higher the level of organohalogens in polar bear, the smaller testicle and baculum size and weight likely were. Ovary size and weight decreased as organohalogen levels rose as well.
Slow to mate
Polar bears have among the lowest reproductive rates for terrestrial mammals. The scientists say reducing polar bear penis size would make sex less successful, upsetting naturally slow-to-grow polar bear numbers. Testicle and ovary shrinkage would upset polar bear reproduction too.
Future research should examine the effects of low levels of organohalogen contamination, Sonne said. "How long do we have to go down in exposure levels to obtain no-effect levels? Is it possible at all?" he explained.
Sonne and his colleagues reported their findings online Aug. 16 via the journal Environmental Science & Technology.
OK..... who exactly is taking these measurements and how?
Maybe it's just the cold.
Well that is some mighty cold water the bears swim in.
Like a frightened turtle, Jerry!
That's just...nutty! ;-)
I know its early, but that could be the Headline of the day.
CHECK EM FOR STEROIDS!!! Them bears is doping!!
Computer modeling? Polar bear porn?
But that's the point. Anybody who has ever watched Seinfeld should know that Global Warming ought to counteract shrinkage.
|
|
They do swim in really cold water, y'know... |
"Do women know about "shrinkage?"
Only took 9 posts. Good job, DFW.
Beat me by 35 seconds!
Maybe they're just shy.
PLOAR BEARS = DEMOCRATS
Pretty calm bears, I'd say.
Must have gotten them drunk first.
Are the polar bears having a difficult time "bringing it"? Getting it up? There is probably a pill they can take but..... they have no opposable thumbs. Bearproof bottles.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.
