Pharaoh's Ant

This past week I received a small sample of ants in need of identification. They were tiny enough that when I attempted to mount them on paper points, the tip of a needle I was holding flicked one into oblivion, and half an hour on my hands and knees were to no avail. Despite this loss, I identified them as a tramp ant species, possibly originating in Egypt (but no one is certain) known as Pharaoh's ant (Monomorium pharaonis).

They were collected from an apartment building in the Vancouver area, where apparently a great number of apartments (hundreds) have been hosting them. Despite their minute size (total length barely 2 mm), they can either weakly sting or bite (technically the 'sting' is non-functional). That they can do one of these I can personally attest too as the mattress I was sleeping on in Borneo was infested with the little darlings. They were just big enough that you could feel them walking over you at night (many of them), and when you rolled over on them, they let you know they found that disagreeable.

Despite the fact that this species is tropical to sub-tropical, it has spread to higher latitudes, living in buildings with central heat. This species has colonies with multiple queens (something we myrmecologists call polygynous) and if the colony is stressed (e.g., someone tries to poison or otherwise harass and attempt to remove them), the colony fragments into many smaller colonies, each with one or more queens. Thus, if just one apartment tenant tries to deal with them, they quickly fragment and spread throughout the building. Having said that, they are likely to do that anyway.

Pharaoh's ant is now found throughout the world. When I checked on "The Authority," that is, the person who first described them, I found it was Linnaeus (a Swede) in 1758. They have been travelling for quite awhile.

Photo Credits: Me

Carnivorous Robots....Really

Technology is advancing in so many directions all at once that I am beginning to suspect we will see some truly startling advances once someone begins to put differing lines together.

The You Tube video above arises from the work of James Auger and Jimmy Loizeau in the UK. Their work is a fusion of art and science that challenges how we use and view the common desiderata of life. In the video above, we have a clock that powers itself from captured flies. A microbial (i.e., bacterial) fuel cell converts the digested bodies of flies into electrical power that runs the clock and fly catching apparatus. Apparently 8 flies will run this for about 12 days.

The Microbial Fuel Cell is a very simple but fascinating device. One could IMAGINE that it might work, but actually getting one to work is quite remarkable. It uses electrons released/transfered by bacteria as they metabolize food. Along with acids (protons) that diffuse over to the cathode, a functional fuel cell is created.

A Microbial Fuel Cell (Logan et al. 2006).

Now if they could only put this together with an ant robot (Click Here), we might have something truly terrifying.

Sources:

You Tube Video Header From: http://www.auger-loizeau.com/index.php?id=13

Microbial Fuel Cell diagram. Logan, B. E., B. Hamelers, R. Rozendal, U. Schröder, J. Keller, S. Freguia, P. Aelterman, W. Verstraete, and K. Rabaey. 2006. Microbial fuel cells: Methodology and technology. Environ. Sci. Technol. 40:5181-5192.

Uncle Milton Passes Away but not Before the Ant-Farm goes into Space

"That's something I'd never do. I'd never step on an ant. Put three of my kids through college."

That quote from Milton Levine, co-creator with his brother-in-law, of the class ant-farm, was taken from an interview with NPR radio. Milton died last week, at the age of 97, in California.

Milton came up with the idea for the ant-farm after watching some pavement ants one day. he brought the classic ant-farm to the market in 1956 and, over the years, has sold over 20 million.

You can still buy the classic Uncle Milton Ant-Farm, as shown above, at a number of on-line retailers. In recent years, however, another design has become more popular. These are an illuminated farm in which the soil/sand has been replaced with a florescent gel. The gel apparently, isn't just a digging medium, but contains some food and water for the ants. I'll have to buy one and try it out.

An ant-farm has even gone into space. A project designed by high school students from Syracuse, New York, sent 17 harvester ants into space on the shuttle Columbia in 2003. The purpose was to study how they tunnel in a micro-gravity environment. While their data was downloaded each day during the project, the ants would never return alive. They were lost when the Columbia disintegrated during re-entry on Feb 1, 2003.

I've always wondered why the choice of ants for these farms was almost always harvester ants (Pogonomyrmex spp.). Apparently their large size reduced the number of escapees, a characteristic some parents probably valued greatly. The problem with this species, however, is their painful sting. It is much worse than the southern fire ant (Solenopsis invicta).

Last night, I happened to catch the replay of an interview on CBC Radio from 1997, with the Canadian distributor for Uncle Milton ant-farms. He didn't seem as particular about the ant species and was offering 0.5 - 0.75 cents per ant to prospective ant-ranglers (I think his ad for ant-ranglers prompted the interview). Seems when people buy these farms they like them to come with ants. I don't know if the job still stands but it could be a fairly lucrative way to spend the summer.

Photo Credit: NPR Radio

http://www.npr.org/2011/01/26/133249612/Uncle-Milton-Ant-Farm-Co-Inventor-Dies-At-97

Croatian Basketball Ants...Oh...and Brad Pitt

Today I received a very interesting ticket to a basketball game held recently in Zagreb, Croatia. It came from a good friend of mine, Glen Chilton (now living in Townsville, Australia), with whom I chased termites in New Orleans a few years back. Glen was in Croatia to chase a particular and peculiar small freshwater fish known as a Dace, previously described as extinct. The purpose of the chase was for a book he is working on. The basketball game was another matter entirely, and Glen thought that it mattered in a particular way to me.

At first glance, as Glen noticed in his letter, the team mascot looks like a bee. Yes, but look at what it is standing upon. In fact, it isn't a bee, but rather an ant. Why would a basketball team choose ants as their team mascot?

I'm thinking they know Greek mythology.

According to Ovid's Metamorphosis, the Island of Aegina was devastated by a plague (caused by Zeus's wife Hera in some accounts) that resulted in the death of all but the family of King Aeacus. The King pleaded to Zeus to help his kingdom. Zeus, in fickle Greek god fashion, answers the call by transforming the ants nesting in an oak tree, just outside the palace window, into an army of young soldiers. We don't learn where the women of the island might have come from but apparently whoever first created this story was unaware that the ants in question would have almost certainly all have been female. In any event, these became know as the Myrmidons, a self-sacrificing, aggressive and ruthless army that would come to be led by Achilles of Illiad fame.

And who played Achilles in the 2004 movie Troy? Brad Pitt! Brad was the leader of the ant army, and descendant of the ants himself.

So why would a basketball team have ants as their mascot? Well, who wouldn`t want to associate a team with the most competitive, aggressive team players on the planet, ants! It was common in England in the 1800s to call gangs of thugs Myrmidons, so it is nice to see ants rehabilitated into a more normative team activity.

Photo credits:

Scanned copy of ticket-Me

Movie Poster from Wikipedia (Troy (film))

Nature vs Nurture

Trust is the central theme in the comedy movie series that started with Meet the Parents. In the sequel, Meet the Fockers, Jack the father-in-law steals a DNA sample from Greg to secretly test for a suspected hidden paternity.

But what if you could test for much more?

Garcia and others (2010) have recently published a study in which they found that the incidence in which one partner in a relationship cheats on the other, more than doubles when the cheating partner has a particular copy of a gene encoding for the dopamine receptor DRD4 (specifically having a form of the gene in which there are more than 7 repeats of a particular sequence in one section of the gene). And were are not talking about guppies here, were are talking about people.

Table 1. Percentage who report an extra-relationship sexual experience by DRD4 genotype (7R+ vs 7R-) (from Garcia and others. 2010).

This dopamine receptor has been turning up in all sorts of interesting behavioral studies. One other form has been associated with political liberalism as an adult, and yet another with Attention Deficit Hyperactivity Disorder.

Intriguing is the well established relationship between dopamine and two hormones (oxytocin and vasopressin). Oxytocin has long been called the "cuddle hormone" because seems to be involved in romantic love, while vasopressin has been labelled as the 'divorce gene,' because a particular receptor type has been linked to problems with pair-bonding (i.e., monogamy).

Perhaps the take home message here is that the old 'O GOD' (i.e., one gene, one disorder) idea is dead, as most biologists have known for a long time. Yes, human behavior is strongly influenced by genes, but it is an interaction of many genes that matter. Research is just beginning to untangle this and any interest in predicting behavior based on what is known now would be less reliable than the already completely unreliable lie detector.

Still, I wonder how the report of the DRD4 infidelity paper will be received. Will there be yet another sequel to Meet the Parents in which Jack has Greg tested for his DRD4 receptor sub-type. I did a quick search to see if any genetics companies were offering a test for DRD4. It seems not yet, but I'll bet it won't be long.

Reference

Garcia JR, et al. 2010. Associations between dopamine D4 receptor gene variation and both infidelity and sexual promiscuity. PLoS ONE 5(11): e14162.