Showing posts with label ants. Show all posts
Showing posts with label ants. Show all posts

Wednesday, December 3, 2014

Bullet Ant Inspired Experiments at La Selva Biological Station (Video)

Check out this video about a bullet ant experiment performed right at our very own La Selva Biological Station. La Selva, run by the Organization for Tropical Studies, is the home of many of our research sites.

The video has some cool shots of bullet ants, the old growth and late-stage secondary forests we are working in for the herp project, and offers a cool example of what visiting graduate students might do in a visiting course with OTS.

If you're interested in the liquid/solid protein confusion on the part of the bullet ants, here is the publication referenced in the video. InsideScience.org did an explanatory piece that's not behind a paywall.

Tuesday, December 2, 2014

Stung by a Bullet Ant! All About 'Paraponera clavata' And Why They Are Scary

Well, it was likely to happen. If most of my work here is bushwhacking through the jungle, brushing up against trees and walking slowly and poking around with a stick, I was bound to tick something off. And tick it off I did!

The sting of the bullet ant, Paraponera clavata, is rated as the most painful hymenopterid sting on the planet (more than a factor of 10 more painful than your average wasp sting, according to the Schmidt sting pain index. It contains a neurotoxic peptide named for the genus, poneratoxin, which blocks the voltage-gated sodium ion channels in the muscle and causes slow and extremely painful slow muscle contractions.

I must either have gotten a glancing or light sting (or stung by a sister species?), because what I experienced was not incapacitating; it peaked at an 8/10 on the pain scale. The pain lasted a little over 2 hours, subsided for about an hour, and returned again in a very painful way for about 90 minutes. The surge-and-subside pattern of pain persisted into the night, but didn't interrupt my sleep. The sting site was numb and inflamed on the day, and twinged throughout the next day. I still have a mental twinge response whenever I see a bullet ant crawling around!

And crawl around they do. They generally nest at the base of large trees (the riskiest place to tick them off), but they forage far and wide, including into places that seem like they should be safe (near other ant nests, swamps, streams, bare earth, etc).

These guys are pretty cool, and I'm definitely researching them a bit more on the side. Here's a short video that I took of one doing something with some kind of nematode:

Harvesting the nematode? Being parasitized by nematode? I need better footage and a parasitic entomologist, please!

Additional videos of the infamous bullet ant glove ritual:


Saturday, November 22, 2014

Fun Fact: The Term For Ant Forage Is...

In my preparation for an upcoming entry on bullet ants and their habits, I've discovered something amazing:

Harkening back to pirates, many articles on ant foraging refer to foraged resources as... ant "booty."
Teehee!
The Blueberry Hunters (7932669124)