animals
grrlscientist | May 21, 2008tags: pets, insects, beetles, coleoptera, hercules beetle, neptune beetle
Male Hercules beetle, Dynastes hercules hercules,
from South America. This is a popular pet throughout Asia, especially in Japan.
Orphaned image.
What constitutes a pet? Different people keep pets for different reasons, although I'll guess that companionship is likely the top reason for keeping pets. While I do enjoy the companionship of my pets, I enjoy keeping interesting animals as pets, and that means that, in addition to the large variety of mammals, birds, fishes and the few reptiles, amphibians and…
edyong | May 21, 2008 The era of genetic sequencing has revealed as much about the ties that bind us to other animals as the differences that set us apart. Often, comparing the genomes of different species shows that large changes in body size, shape and form are not mirrored by similar changes at a genetic level. New adaptations typically come about through small changes that redeploy existing genes to different ends, rather than raw innovation.
Snakes are an exception. A new study by Todd Castoe and Zhi Jiang at the University of Colorado has shown that the lifestyle of serpents is so unique that some of…
voltagegate | May 19, 2008Well, not really. But I'm surprised that I've racked up over 66k views and 86 comments from this video of a peculiar lion roar at the Pittsburgh Zoo, so I thought I'd share it here.
I think someone could start a series of blog posts/videos called "Stupid Things People Say at Zoos". You could literally spend one day at any zoo and have enough material for months of blogging. I swear that guy you hear in the background shadowed us all day.
I've got some more videos I've been meaning to upload, including one of the red panda in the Atlanta Zoo, and another of a polar bear from the Pittsburgh…
edyong | May 17, 2008As far as humans are concerned, sexually-transmitted infections are things to avoid. But imagine if these infections didn't cause death and disease, but gave you superpowers instead. It may sound like a bizarre fantasy, but it's just part of life for aphids.
Aphids mostly reproduce without sex, giving rise to many all-female generations that are exact copies (clones) of their parents. They only have sex once in autumn, the only time when mothers give birth to males. Asexual reproduction makes sense for aphid mothers since they pass on all of their genes to their daughters. If they…
edyong | May 15, 2008Hi folks,
I'm working on a large feature and I want to break the back of it over the weekend. So as a ittle bit diversion, I wanted to share with you two awesome videos that I took last weekend of gibbons moving with characteristic and incredible agility at Thrigby Hall Wildlife Gardens in Suffolk. Gibbons were one of the highlights of David Attenborough's Life of Mammals, and I was utterly captivated by footage of them monkeyi... er.. apeing about in trees, swinging through the canopy at high speed. (There's a second video and some commentary after the jump)
This style of movement, known…
edyong | May 15, 2008Last year, I blogged about an ironic public health strategy - controlling malaria with mosquitoes. The mozzies in question are genetically engineered to be resistant to the malaria parasite, Plasmodium. The idea is that these GM-mosquitoes would mate with wild ones and spread their resistance genes through the natural population.
The approach seems promising but it relies crucially on the ability of the resistant males to successfully compete for the attentions of females in wild populations. The 1960s and 1970s witnessed several failed attempts to control malaria by swamping natural…
edyong | May 13, 2008Three-toed sloths have a reputation for being some of the sleepiest of all animals, largely due to a single study, which found that captive sloths snooze for 16 hours a day. That certainly seems like a sweet deal to me, but it seems that the sloth's somnolent reputation has been exaggerated.
A new study - the first ever to record brain activity in a wild sleeping animal - reveals that wild sloths are far less lethargic than their captive cousins. In their natural habitat, three-toed sloths sleep for only 9.6 hours a day, not much more than an average first-year university student.
Wild…
edyong | May 9, 2008
This week's New Scientist includes a short piece from me about conformist rats.
Until now, only humans and chimps were known to succumb to peer pressure, to the extent that we often ignore our own experiences based on the preferences of others. But a new study in brown rats shows that these rodents are similarly prone to following the Joneses. They can even be persuaded to choose a piece of food that they know makes them sick if they smell it on the breath of a 'demonstrator' rat.
Bennett Galef and Elaine Whiskin at McMaster University in Hamilton, Ontaria, Canada, trained rats to avoid…
edyong | May 8, 2008
A tenth of the planet's population occasionally suffers through devastating famines because small insects fear being bitten in the bum. That's the astonishing message from a new study of one of mankind's greatest pests - the desert locust.
Swarms can stretch for several hundred square kilometres and each of these harbours up to 80 million hungry sets of mandibles that eat their own body weight in food every day. These plagues are unpredictable but they only form when locust populations reach some sort of critical mass. Desert locusts are two insects for the price of one; at a crowded…
edyong | May 6, 2008Cuckoos are some of nature's most familiar conmen. Several species of this large family are murderous slackers, who shun their own parental responsibilities by deceiving other birds into caring for their chicks. In the process, they destroy the eggs of the unwitting adopted family to ensure that their own chick gets undivided attention. But this is not the only way that cuckoos fool other birds - they also mimic hawks.
The resemblance between cuckoos and hawks (particularly sparrowhawks) has been noted for millennia. Both birds have long bodies, wings and tails and their paler, striped…
voltagegate | May 6, 2008Do we have something against David Attenborough in this country? First his narration for Planet Earth was overdubbed by Sigourney Weaver, and now I've heard that Life in Cold Blood is not even going to be televised in the States.
I got this email from Herpdigest this morning:
Animal Planet just emailed me.
"Life in Cold Blood" will not be airing May 7 or 14.
They do not know of any new dates.
Sounds like they are dumping it. Won't be seen in U.S. And the only way to see it is to buy the DVD if they do produce one.
Lame. At least Herpdigest is offering the book though:
Or you can buy the book…
edyong | May 3, 2008I'm away for the weekend so I thought that I'd repost an article from the old Wordpress blog. This is actually the first ever article I wrote for Not Exactly Rocket Science and I've updated it slightly to take more recent findings into account. I'm considering doing these reposts every Saturday, but let me know whether you're keen on the idea.
Cancer cells are, for all intents and purposes, immortal. Having broken free of the rules and strictures that govern other cells, they are free to grow and divide as they please. In a short space of time, a lone cancer cell can form a mass of identical…
edyong | May 1, 2008 Ultraviolet (UV) radiation lies beyond the violet end of the rainbow. Our eyes aren't equipped to see it and its presence only becomes visually apparent when enough of it hits our skin and causes a painful, red patch - a sunburn. But not all animals have eyes that are so ill-equipped. The females of the jumping spider Phintella vittata not only see UV light, they also find it sexy.
UV light may be invisible to us but many animals can see it and use it to communicate. Sometimes, this is deliberate, as in the case of blue tits using UV patches to seduce females. It can also be inadvertent…
voltagegate | April 24, 2008Ed has a great review of a recent paper in Nature presenting new research that describes just how extensive the damage done by the mountain pine beetle in British Columbia. The culprit of the outbreak is most likely climate change since sudden drops in temperature common in northern areas like BC have historically been a check on the beetle's population; in recent years, the winters have been less intense and the beetle populations have benefited from the extension.
It immediately reminded me of the extinction-themed AAAS session I attended and blogged about last year, where ecologist Jim…
edyong | April 23, 2008In the story of climate change, humans and the carbon dioxide we pump into the atmosphere are the villains of the piece. Now, it seems that we have an accomplice and a most unexpected one at that. It lives in the pine forests of North America and even though it measures just 5 millimetres in length, it is turning these woods from carbon sinks into carbon sources. It's the mountain pine beetle.
The beetle bores into pine trees and feeds from nutrient-carrying vessels called phloem. It also lays its eggs there. Once a beetle has colonised a pine, it pumps out pheromones that attract others,…
voltagegate | April 21, 2008A comparison of carbon/oxygen isotope ratios from the tooth enamel of two early proboscideans, Moeritherium and Barytherium to other animals of the same era (circa 37 mya) revealed to researchers the possibility of a ancient, semi-aquatic animal, linking the speculated split of dugong and elephant from a common ancestor. "The scientists" (as the article begins; that's some lead) said that they have:
...substantial evidence to suggest that modern elephants do have ancient relatives which lived primarily in water. The next steps are to conduct similar analyses on other elephant ancestors to…
grrlscientist | April 21, 2008tags: raccoon, Procyon lotor, Image of the Day
Central Park raccoon, Procyon lotor.
Image: Bob Levy, author of Club George [larger].
Bob Levy writes:
It's a little known fact but an incontrovertible one. Having had the opportunity to closely study the Central Park Raccoon population it did not take me long to discover that it is common for them to greatly exaggerate their exploits and accomplishments. In this image I was able to capture one typical example. Tsk, tsk. What a fibber. I was there. It was half that size.
voltagegate | April 8, 2008It has been claimed in the past that birdfeeders were bad for the environment, and now a couple of researchers are looking into published literature on whether or not birdfeeders significantly disrupt the ecology and future evolution of birds.
The PR from SD is basically highlights of the researchers' survey, including indications that birds may get "trapped" in inhospitable areas by the surplus of food or that birdfeeders can disrupt a bird's natural breeding/feeding cycle throughout the year.
This review seems to be a jumping off point for more research:
"Changing the natural dynamics of…
voltagegate | April 7, 2008When I was traveling around the country for media conferences in college, the very first thing I did upon arrival was find the aquarium, the zoo and the natural history museum, find how to get there via public transportation and go. I've been living in Atlanta for about a month now, and I haven't done any of the above.
Why? I blame money, mostly. The Georgia Aquarium, which is supposedly beautiful and engaging, is also exquisitely expensive. So is the zoo. And the art and natural history museums. We were casually planning on taking a trip to the aquarium yesterday, but including parking fees…