Connected on 2009-11-19 15:30:00
from Hayward, CA, US
- 2:52 pm
- Bugscope Teamyo
- 2:58 pm
- 3:03 pm
- 3:13 pm
- 3:19 pm
- Bugscope TeamHello!
- Bugscope TeamStill setting up.
- Bugscope TeamThis is Scott as well.
- TeacherHey there! This is Michele at CSU! We will be starting in about 15 minutes. COOLIO images!!! WOW!!!!
- 3:24 pm
- Bugscope Teamum guess what this is
- Bugscope Teamwelcome back to bugscope
- 3:30 pm
- 3:36 pm
- 3:43 pm
- Bugscope Teamwe are ready to roll
- TeacherWE are readfy to start. The images keep jumping.
- Bugscope Teamscott is finding a cool preset, then we'll unlock it for you
- Bugscope Teamok, you should see controls now
- Bugscope Teamthis is a spider, the fangs, the simple eyes, of course setae all over
- Bugscope Teamspiders have the ability to jettison (autotomize) their limbs if they sense venom from a bite in one of them
- 3:49 pm
- Bugscope Teambut that is not what happened to that spider
- Bugscope Teamthis is the back edge of a fly's wing
- Bugscope Teamdown below (above, actually) is the surface of another wing, OOF
- Bugscope Teama lot of the samples have mold on them, not a big surprise
- Bugscope Teamplease feel free to ask us any questions
- Bugscope Teamthe tiny hairs are microsetae
- TeacherWhat is a microsetae?
- Bugscope Teamlarger hairs are called setae, or trichae, or bristles or spines
- Bugscope TeamI think of microsetae as hair-like, but they are not sensory
- TeacherWhat do they do?
- Bugscope Teamsome of the terms are used interchangeably
- Bugscope Teamthey may help give the wing lift, just as scales may
- 3:54 pm
- Bugscope Teamyou find scales on moths, butterflies, skippers, silverfish, mosquitoes, and some weevils
- Bugscope Teamscales seem to be like tiny feathers and may have a similar function, but some entomologists consider their purpose to be getting out of spider webs
- Bugscope TeamI should say also that scales form color patterns in wings, for example
- Bugscope Teamscales form structural colors as well as pigment colors
- Bugscope TeamOOF
- TeacherOOF? You ok?
- Bugscope Teamthe ridges are close enough to each other to interfere with light refracted from them
- Bugscope TeamOOF means out of focus, and it looks like you are fine
- Bugscope Teamyou are good at this
- Bugscope Teambut try another preset if you wish
- Bugscope Teamthis is the tip of the spider fang
- TeacherThis is a student
- Bugscope Teamand you can see one of the poison pores
- TeacherWhy aren't our questions coming up?
- Teacheron the left side?
Bugscope Teamthey will if we do this
- Teacherperfect
- Teacherthanks
Bugscope Teamoften when things are flying fast and furious, the kids won't look to the left
- Bugscope Teamwhat we have found is that few people use it
- TeacherWhich one is the poison pore?
Bugscope Teamalmost in the ceneter
- 3:59 pm
- Bugscope Teamcenter
- Bugscope Teamnow you can see how the spider holds its prey to it as it bites
- Teacher Will you navigate for us and show us where on this insect this fang is?
- Bugscope Teamcool, scott will navigate, i can help answer questions
- Bugscope Teamspiders inject venom into their prey; it dissolves the internal organs; and they suck it all back up like a milkshake
- TeacherWhat is juju?
Bugscope Teamjuju is our term for dirt, grim, junk, stuff we are not sure what it is, but it's not part of the insect
- Bugscope Teamsee the fangs now?
- TeacherYes thank you?
- Bugscope Teamyou can see two or three eyes
- Bugscope Teamthe fangs go sideways, and they are at the end of the chelicers, or chelicerae
- TeacherWhy can you see the juju?
Bugscope Teamwell, insects have lots of dirt on them, and that juju shows up in the scope just as well as the insects body parts do
- Bugscope Teamit is hard to see all of that with the palps in the way
- TeacherCould you take us back to the juju?
- Bugscope Teamall of the chelicers
- Bugscope Teamso right here in the center -- that is probably venom that dripped out of the fang and dried
- Bugscope Teamyou can see the slit that is the poison pore
- Bugscope Teamof course there was a mold spore on that as well
- 4:04 pm
- Bugscope Teamhead of the praying mantis
- Teacherwhat is its purpose?
- Bugscope Teamit eats other insects
- Teacherdoes it bite?
Bugscope Teamoh yes, the female praying mantis actually bites the male's head off at some point
- Bugscope Teamyou bet
- Bugscope Teamand eats it
- Bugscope Teamthey use those seriously spiked forearms to hold their prey while they eat it
- Teacheris that a big eyeball
Bugscope Teamit's called a compound eye, and yes it's huge isn't it! it's made up of thousands of individual facets, called ommatidia
- Teacherhow does it see?
- Bugscope Teamyes it has good peripheral vision
- Teacherwhat is this?
- Bugscope Teamif you had compound eyes you would be extra sensitive to motion
- Bugscope Teamthat is one of the forearms of the p.m.
- Teacherhow does it function?
Bugscope Teamthe praying mantis ambushes its prey, and it grasps it with those badboy forearms, holds it tight while it chews into it
- Bugscope Teampraying mantises are also known to kill and eat small birds, frogs, snakes, etc. they are pretty cool
- Bugscope Teamambush bugs have something like this as well, but they have piercing mouthparts
- Bugscope Teamso they usually kind of hang out, sit still, but they are ready to pounce
- Teacherhow does it kill its prey
Bugscope Teamit bites and tears
- Bugscope Teamhere's a cool pic of a mantis feeding on another insect, using those forearms
- 4:10 pm
- Bugscope Teami'm going to zoo in on the compund eye
- Bugscope Teamsee the individual facets? those are called ommatidia, and they each have a lens in them
- Bugscope Teamso the compound eye is made up of thousands of individual lens's and that really helps the mantis' vision
- Bugscope Teamit is hard to see the facets of the compound eye on a praying mantis, or a roach or cricket or grasshopper
- Bugscope Teamthis is the tip of one of the spider's arms/legs
- Bugscope Teamyou can see some web there
- Bugscope Teamnice job with focus! you are getting good at this
- Bugscope Teamyou can tweak the focus and it will be better -- focus is up or down, so if it gets worse go the other way
- TeacherIs this web or hairs?
- Teacherexplain mighty one
- Bugscope Teamof course you figured it out nicely
- Bugscope Teamheh
- Teacherwe are not worthy
Bugscope Teamyou are doing great!
- Bugscope Teami think this is web, right scott?
- Teachernew student here by the way
- Bugscope TeamI believe this is web, in part because it is so, apparently, flexible
- Bugscope Teamcheck out the scale bar in the lower left, if you click on it it'll tell you more detail about what you are seeing
- 4:15 pm
- Bugscope Teamhairs or setae, or more likely fungal hyphae are not so flexible
- Bugscope Teamand then of course, 1 um means 1 micron, which is equal to one millionth of a meter
- Bugscope Teamthe spider web, or silk, may not always be sticky. sometimes it is not
- Bugscope Teamspiders can recycle their web by eating it
- Bugscope Teamthis is so cool, here
- Teacherwhat does tenent mean?
Bugscope Teamit comes from spanish, tener, to hold, so in this case these setae are holders, they hold onto things. these are the tiny pads that help insects to climb walls and such, the tenent setae use a force called the van der waals force
- Bugscope Teamthose are the little sticky setae that some insects use to help hold onto glass, or the ceiling, for example
- Teacherwhere are we on the spider now?
- Bugscope Teamthe tenent setae are part of a pad called the pulvillus
- Bugscope Teamthis is a fly claw
- Bugscope Teamnow we see what we see on many insects -- the actual claws
- Bugscope Teamthere is a tendon inside the tarsi -- the terminal segments of the limb -- that pulls or loosens to close/open the claw
- Bugscope Teamthe tendon is called an unguitractor, in case you wondered
- Bugscope Teamah cool, these are salt crystals
- Bugscope Team8000x, very cool
- 4:20 pm
- Bugscope Teamthis scope can actually magnify up to 800,000x. but for this sample, it's betst to view at 40x-40,000x
- Bugscope Teamit is NaCl, but it seems also to have had an anticaking agent added to it that causes it to form those cool shapes
- Bugscope Teamif you lclick on the micron bar in the lower left corner you can call up the 'scope parameters
- Bugscope Teamwe are at a large working distance, so it might be hard to get good focus at a high mag
- Bugscope Teamclick, that is
- Bugscope Teamspider eyes
- Teacheris the eye covered in hair?
- Bugscope Teamnote that insects and other arthropods have lots and lots of what looks like hair, and what we have been calling setae
- Teachernew student
- Bugscope Teamhi, welcome to bugscope
- Bugscope Teamyeah, zoom out to get a better look at the whole insect
- Bugscope Teamthis is an antler
- Teacheris this from a moth?
- Bugscope Teamnot sure
- Bugscope Teamtry going west, there ya go, keep going... this is the praying mantis
- Bugscope Teamso that was the close up of a praying matis antler, from atop it's head
- Bugscope Teamprobably used to sense its environment, find food, etc.
- 4:25 pm
- Bugscope Teamso this is the praying mantis forearm, used to grasp prey when it feeds
- Bugscope Teampraying mantis are exclusively predatory insects, they feed on other insects, and in some cases other animals like birds and mice
- Bugscope Teamof corse all insects have an exoskeleton, that is a hard outer shell
- Bugscope Teamthe exoskeleton holds in all the guts and stuff
- Bugscope Teamah, this is cool, this is a moth scale
- Bugscope Teammoth scales have these holes in between the ribs, that helps to keep the weight down of the scale
- Bugscope Teamusually the holes are bigger, this is an unusual scale i think?
- TeacherHow do they use their scales?
- Bugscope Teamyeah this is an unusual scale, grey or brown
- Bugscope Teamone thing that scales are very good for is escaping from spider webs
- Bugscope Teamthe insect can shed its scales and slip out
- Bugscope Teamit can shed the scales that get stuck to the web, that is
- 4:30 pm
- Bugscope Teamscales also form color patterns that help species recognize each other
- Bugscope Teamand the colors may be from pigments, but they may also be due to the ridges
- Bugscope Teamand this is the compound eye of the moth
- TeacherWe are at the end of our session, see you next week, thanks alot...Nick
Bugscope Teamyou did great, thank you!
- Bugscope Teamthe preset has drifted a bit, that chuck is probably just juju. if you want to see the mold spore i think that is north from here
- Bugscope TeamThank You!
- Bugscope Teamnice session everyone, we are done, goodbye!
