Connected on 2014-09-15 09:00:00 from Middlesex County, New Jersey, United States
- Bugscope Team sample for today's session is pumping down
- Bugscope Team good morning, Hui!
- Bugscope Team in a few minutes we'
- Bugscope Team ll be doing setup for today's session, which starts at 9 our time, on about 53 minutes.
- Bugscope Team now you can see the sample in a CCD view, inside the specimen chamber
- Bugscope Team soon I will turn on the electron beam, make some adjustments, and start collecting presets for this morning's session
- Bugscope Team don't need help
- Bugscope Team hi vanessa!
- Guest I am joining so my 4th grade class can experience this event. We have one scheduled for Oct 24. I'm not really sure how this works. works ddule
- Bugscope Team Vanessa if today's school has forgotten us, you may be the Supreme Rulers today. I'
- Bugscope Team ll call them.
- Bugscope Team Vanessa for the moment I have given you control of the microscope. You should now be able to click on any of the presets, on the lefthand screen, and the 'scope will drive to that position on the stub.
- Bugscope Team the most ethical way you can kill the insects is to stick them in the freezer. this will make them fall asleep and they will die without knowing it
- Bugscope Team it is all typed -- otherwise we cannot be sure who would speak, and from where, nor whether anyone could hear us.
- Bugscope Team people often collect insects they find dead. fresh dead is much better than dumping them out of a lampshade, however.
- Guest Can we actually talk to you? Or is it all typed? My students are facing the ethical dilemma of killing the insects to send to you. Might we discuss that and how this interfaces with science? w the t ma of
Bugscope Team In terms of affecting the number of insects in the wild, for most species of insects their reproduction rate is so high that you killing a few of them for this viewing will in no way impact their population at all. So if you were worrying about that it isn't
Bugscope Team a problem
- Bugscope Team as Cate says, we often freeze insects we find in the house.'
- Bugscope Team you can set it up so that each student, or pairs of students, are at a computer, for example if you have access to computer lab.
- Bugscope Team this is the head of a cranefly -- one of those flies that looks like a giant mosquito.
- Guest If I click on a preset on the left, do we ask questions about the species?
Bugscope Team if you click on the preset, the 'scope will drive to that place; it will then be on the central screen. usually people are more interested in knowing what parts they are looking at, not so much what species it is. we may not know the genus and species.
Bugscope Team In most cases, identifying an insect to species requires an expert in that group of insects; there are just so many species, its too much for one person to know
- Bugscope Team you can see salt granules around its head.
- Bugscope Team the giant cranefly is Tipula abdominalis
- Bugscope Team this is one of the Tipula species...
- Guest A student wants to know where its eyes are
Bugscope Team The large light gray circle is one of its compound eyes. If you zoom in on it you should be able to see that it is composed of many facets called Ommatidia
- Bugscope Team we can see that the compound eye, of which there are two, has maybe 300 ommatidia
- Bugscope Team some flying insects also have what are called simple eyes, or ocelli, on the top of their head, and usually there are three
- Guest What is the benefit to faceted eyes?
Bugscope Team one advantage is that the individual ommatidia -- the facets -- update very quickly, which is important in the insect world, in which movement occurs very quickly
- Bugscope Team also, compound eyes allow the insect to see more of what is around them at one time.
- Guest I am losing some of your text and can't seem to scroll down to read it. Do you know what I'm doing wrong? g
Bugscope Team it likely has to do with the setting of your screen resolution
Bugscope Team that of the screen I am using now is 2560 x 1600
- Guest I'll look into that for next time.
- Guest We recognize the faceted eyes. Can you explain a little more about what we're looking at?
Bugscope Team this is the head of an ant, and we can see its antennae; there is a difference in ant antennae compared to wasp antennae in that first joint.
Bugscope Team You can also see its mandibles -- its jaws -- at the bottom of the image.
Bugscope Team sticking out of its jaws are feelers, called palps, that it uses to taste its prospective food
- Bugscope Team the faceted eyes are very small -- they have few ommatidia, few facets
Bugscope Team it's a clue, telling us that the eyes may not be as important in this species.
Bugscope Team Since most ant species are subterranean, they often do not use their vision much and instead rely on chemical senses to navigate their environment and communicate
- Guest Students want to know of the cranefly is also called the bandit fly or the mosquito hawk.
Bugscope Team cranefly is the same as the mosquito hawk. I am not sure with the bandit fly
Bugscope Team I've never heard bandit fly before, but if I had to guess I would say it probably refers to robber flies, predatory flies in the family asilidae
- Guest Thank you. We need to go, but I am going to try to resolve my screen issue before our session in October
Bugscope Team No problem :) happy to help
- Bugscope Team super cool. Thank you, Vanessa! We look forward to seeing you in October!
- Bugscope Team Hui please let us know if you would like to try driving. Our school may not connect today>
- Bugscope Team Hui I have given you control.
- Guest What is the difference?
Bugscope Team Ant antennae are geniculate - meaning that they have a single movable joint or "elbow". In wasp antennae, the antennae are straight and do not have elbows
Bugscope Team ants have a long segment called a scape, which we see now, that is not jointed.
Bugscope Team Correct me if I am wrong, but I believe wasps antennae also have scapes, but they are much smaller and thus do not allow for geniculate antennae
Bugscope Team I found something on the web that says that wasps generally do not have elbowed antennae, except for thread-waisted wasps; the other main difference is the petioles -- the little bead-like body segments
Bugscope Team I believe that in antennae, only the scape and pedicel have muscle attachment and are capable of movement. the last segments, the flagellomeres, are actually pseudosegments and do not have muscle attachments that allow for individual movements of each segment. Hence in order for geniculate antennae to evolve, the scape would have to elongate. But I checked and wasps do also have scapes, they are just relatively shorter, very similar in length to the other segments
Bugscope Team Thank you, Josh!
Bugscope Team No problem. This is a great refresher activity for me :)
- Bugscope Team Hui I think we're going to close down. We plan to be back on Tuesday morning.
- Bugscope Team wednesday right?
- Bugscope Team Duh sorry yes Wednesday morning, a bit early.
- Bugscope Team Alright, shame they didn't show up but at least Vanessa got something out of it. Later dudes
- Bugscope Team I'm going to shut down. I'll wipe out everyone who is still logged in.
- Bugscope Team Thank you, Josh!
- Bugscope Team Thank you, Daniel!