As a first time employee for BIO, I’ve learned a great deal and had many first time experiences over the past two weeks. From learning how to tissue sample to my first time writing a blog, almost everything has been new and exciting.
My name is Josh and I’m a second year student working predominately under BIO’s resident arachnologist. The project I’m currently working on is maintaining and inventorying his two fluid lockers which are where most, if not all, of BIO’s arachnids are archived. Unlike many insects which can be pinned and stored in dry lockers, spiders need to be preserved in ethanol – hence the name, fluid locker. Over time, this ethanol evaporates and leaks through small gaps between the container and lid, meaning that if left unchecked, the spiders can dry out and become damaged. This is where I come in; I’ve been tasked with adding ethanol to the depleted containers and in the process, I get to see some very neat spiders. Once the ethanol has been added, I tape the seal using stretchy tape called “Parafilm” which acts as a barrier that inhibits evaporation, meaning that this routine maintenance needs to be done less often.
The second part of my job is assisting the collections department with any tasks that need completed. I usually spend the first hour or so in the collections department tearing legs off of arthropods. This is called tissue sampling – a part of the specimen (usually a leg) is removed for future DNA barcode analysis. Some of the specimens are no larger than a tack making some of the legs very difficult to remove. Trying to retrieve a single leg without damaging the specimen is like a strange version of the board game, “Operation”. To add another dimension of difficulty to tissue sampling, there are certain legs you can and cannot remove for certain groups of organisms. For example, on flies, moths, and beetles, the ideal leg to take is the middle right leg. On spiders, you can take any leg but those from the first set which are used for copulation. On caterpillars, you can take any of the “true legs” but not the prolegs which although aren’t regarded as legs, closely resemble the caterpillars true legs. The challenge of it all and the fact that I get to see tons of interesting insects and spiders makes tissue sampling really enjoyable.
Although the office work is great, I’ve really enjoyed being out in the field over the past two weeks. I was part of an ongoing program that involves BIO staff heading to the rare Charitable Research Reserve every Thursday to service our malaise and pitfall traps. If you’re ever walking through and see a tent-like structure with a bottle attached to its front, that’s a malaise trap. Flying insects fly upwards towards the white part of the tent and ultimately get trapped in a bottle of ethanol which we take back to BIO and analyze. Hidden on the floor surrounding the malaise trap, are three pitfall traps. Land bound insects unknowingly walk into our traps, fall into the jar of ethanol, and can’t get back out again. Both times I’ve been out the weather has been great and here’s hoping it stays so.
More to come soon!