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Bigger Insects

I want a two foot long dragonfly.
  (+1)
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Selective breeding with dogs and cats has produced myriad shapes, sizes, colours etc. Genetic engineering aside, I was wondering if it would be possible to create larger and larger insects by picking out the biggest ones at each generation.

Humongous dragonflies existed in prehistoric times, so supporting the exoskeleton appears not to be a problem, at least up to a certain size.

I think they would make lovely pets.

sild, Nov 22 2002

Hasbro's BIO Bugs http://media.hasbro...ease.cfm?release=62
or convince Hasbro to keep advancing these until one can fly [krelnik]

A message from a thread entitled: "Re: Why there no big insect? Help!" news://News.CIS.DFN...@corp.supernews.com
it's in 'sci.bio.entomology.misc'. [krelnik, Oct 04 2004, last modified Oct 21 2004]

The New Zealand Weta http://weta.boarsnest.net/
Currently the world's largest insect. [DrBob, Oct 04 2004, last modified Oct 21 2004]

Macropanesthia rhinoceros http://www.qmuseum....ages/cockroach2.jpg
[UnaBubba, Oct 04 2004]

[link]






       eventually they could be trained and used for transportation. the breeding program should start in Australia, the bugs already have a head start.
rbl, Nov 22 2002
  

       a 12 ft spider would make a great all terrain vehicle, and carry several passengers with ease. actually, it would be a living tow truck too.
rbl, Nov 22 2002
  

       "Just pop in your patent HB time machine."   

       Cool. Made of shiny leather!
bristolz, Nov 22 2002
  

       Want bigger insects? Come to New York.
snarfyguy, Nov 22 2002
  

       I thought insects had a mass-to-surface area limit beyond which they wouldn't be able to intake enough oxygen.
bookworm, Nov 22 2002
  

       [bookworm] - you've nailed it. I just found out that oxygen levels were much much higher at the times of the big dragonflies. Rich enough to cause fire to rip through forests all the time, even when it was raining really heavily - wow!   

       And there were scorpions a metre long. Oh well, it was a nice thought.
sild, Nov 26 2002
  

       Starship Troopers acommin !
skinflaps, Nov 26 2002
  

       Fortunately Macropanesthia rhinoceros can't fly. They are pretty big, though.   

       Ask [bliss] about the spiders we have here.
UnaBubba, Nov 26 2002
  

       I thought that insects couldn't function beyond a certain size due to sturctural weaknesses of their exoskeleton. (Which is why everything 'big' these days has an endoskeleton?)
Jinbish, Nov 26 2002
  

       That was the received wisdom when I were a lad.
angel, Nov 26 2002
  

       Then how did these prehistoric behemuths do it? Gravity hasn't changed, though the extreme prehistoric humidity may have provided a bit of support. As [bookworm]'s already pointed out, the limiting factor is oxygen, not structural.
sild, Nov 26 2002
  

       I agree. I'm merely confirming for [Jinbish] that the alternative explanation, however incorrect, is somewhat widespread.
angel, Nov 26 2002
  

       I still say that the dinosaur killing meteor, hit the earth at a tangent to its spin and slowed it down just enough so that the big critters couldn't stay up anymore. The gravity did change.   

       The only big things we have here are squids, ohhh and we have the giant east coast earthworm too I think that grows damn big, I remember finding one on a school camp as long as my arm.
Gulherme, Nov 30 2002
  

       Bugs have blood don't they? Have them where a lung machien hooked up to a O2 tank. Or just have them as museum exibits.
my-nep, Oct 18 2003
  
      
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