December 10th and 11th, I had the absolute pleasure of attending my first scientific conference while in grad school – the SINNERS (Social Insects iN the North-East RegionS) meet up, for social insect entomologists in the NE US. The conference was hosted by the Powell lab at George Washington University, and was a rollicking good time – the sort of party only social insect people can put on, you get me?
This was my first time at a conference like this, so I gave a little lightning talk about my burgeoning social spider project (yeah, social spider. You heard me). It was really well received, and people had great questions even though I strayed from the ‘insects’ part on the conference name a tad (SANNERS – social arthropods – doesn’t have as nice a ring, I guess). I thought I’d give you a really small taste of just a few of the amazing presentations given at the conference that really excited me.
Ant-mimicking rove beetles – Dr. Joseph Parker from Columbia University
Dr. Joseph Parker gave a talk entitled “Evolution and development of rove beetle myrmecophiles” (you can read more about this here, in a paper he published). Myrmecophile literally just means ‘myrmeco’ – ant – and ‘phile’ – loving; basically, species other than ants that capitalize on the structure of the ant society. In the case of these beetles, many live within ant colonies, receiving food and protection from the ants they mimic. However, ants are obviously not a huge fan of these thieves, and thus the beetles have to do their best to chemically and morphologically mimic the ants of the colony they are infiltrating – which some beetle species have done really well.
You can see a picture on the left of the incredible mimicry in form that these beetles undergo in order to be able to pass as ants (to ants!) and thus live in ant colonies. Dr. Parker’s talk mentioned how the benefits of successful ant-mimicry led to multiple independent evolutions of the behavior, and how novel glands had even been developed in particular beetle species to ‘control’ the host species. In particular, he mentioned an ‘adoption’ secretion which causes the ants to pick up the beetle, carry it into the colony, and deposit it in the brood (egg) chamber for it to feast on the baby ants. Other beetles are also able to use the ant alarm pheromone and pass other chemical ‘tests’ required when living in a hostile ant colony.
Snap and Trap Jaw Ants – Dr. Fredrick Larabee
— Joshua Gibson (@DrStrangeAnt) December 10, 2016
The above video is of Plectroctena mandibularis, an African snapping ant; it was posted by @DrStrangeAnt to Twitter on December 10th, and gives you an idea of how fast and powerful these ants’ jaws are.
Dr. Fredrick Larabee, from the National Museum of Natural History, gave a great talk entitled “Kinematics and Functional Morphology of the Snapping Ant, Mystrium camillae”. We got to see amazing, up-close videos of the snapping jaws of different ant species – the Mystrium and the Mymoteras. The Mymoteras video was particularly incredible – it was taken at 1 million frames per second, in order to be fast enough to capture the snapping jaw. It’s one of (if not the) fastest animal movement on the planet. Mystrium is less impressive, with the video taken at “only” 1 thousand frames per second. The muscle that it takes to power movement that fast is incredible; sections of the ants’ heads show about 90% of the head is made of muscle in Mystrium. Different trap/snap jaw ants use different mechanisms to make their jaws shut, but all of them are lightning fast!
There were other incredible presentations given on thermal tolerance in army ants and how they regulate the temperature of their brood for optimal rearing conditions on the road (army ants are nomadic), math that showed the way ants find the optimal position for making living bridges of their own bodies, and even preliminary thermal imaging results that show how honey bees manage cases of honey bee fever in their colonies.
All in all, the conference was AMAZING and I can’t wait to go again. A huge thanks to the Powell lab for organizing everything this year. What do you think makes for a good conference? Let me know, in the comments!