So what did we learn? A few salient points: High frequencies didn't really travel far into the body and were dissipated in more peripheral joints. Lower frequencies travelled further.
-
Prikaži ovu nit
-
But many joints were actually tuned to vibrations of certain frequencies. This wasn't apparent from previous measurements in which the weight of the animals was supported and the joints mechanically 'isolated'
1 reply 0 proslijeđenih tweetova 7 korisnika označava da im se sviđaPrikaži ovu nit -
So basically while the sensors themselves aren't particularly tuned, the body gives the joints tuning. Tuning arises from the body's mass and mechanics rather than from sensor characteristics.
1 reply 1 proslijeđeni tweet 9 korisnika označava da im se sviđaPrikaži ovu nit -
Which would mean that as the spider changed the body, its weight, its posture, its position on the web it could change its own mechanosensory tuning!
1 reply 0 proslijeđenih tweetova 8 korisnika označava da im se sviđaPrikaži ovu nit -
So we tested this. What happens when the spider puts on weight? After eating? Or becoming gravid?
1 reply 0 proslijeđenih tweetova 5 korisnika označava da im se sviđaPrikaži ovu nit -
Turns out almost nothing happens to the tuning!!! Joint tuning is super-robust to body weight changes, so a hungry and a full spider can sense that courting male just as well as each other.
1 reply 0 proslijeđenih tweetova 7 korisnika označava da im se sviđaPrikaži ovu nit -
And if they decide to eat him, that's a decision they made and likely not a sensory mistake!https://academic.oup.com/beheco/article-abstract/9/1/33/239370 …
1 reply 0 proslijeđenih tweetova 7 korisnika označava da im se sviđaPrikaži ovu nit -
But posture, on the other hand, changes everything! Tuning at all the joints changes! Here's an example below...what happens in the crouching posture is tuning shifts up in frequency...pic.twitter.com/LTNFTKdPNz
4 proslijeđena tweeta 17 korisnika označava da im se sviđaPrikaži ovu nit -
This shift may allow female to ignore low frequency vibrations, typically found in male courtship and in large prey items and to concentrate on smaller prey items. So basically females may be deployin this posture when they're hungry.
1 reply 0 proslijeđenih tweetova 8 korisnika označava da im se sviđaPrikaži ovu nit -
Paying more 'attention' to small prey on the web! Or perhaps when winds blow and the whole web shakes. They may use this posture to prevent their mechanosensory system from being desensitized by overstimulation!
1 reply 0 proslijeđenih tweetova 6 korisnika označava da im se sviđaPrikaži ovu nit
So essentially we show that female black widow spiders can use posture to change the tuning of their mechanosensory system and can use it to direct attention to different signal components!
Čini se da učitavanje traje već neko vrijeme.
Twitter je možda preopterećen ili ima kratkotrajnih poteškoća u radu. Pokušajte ponovno ili potražite dodatne informacije u odjeljku Status Twittera.