Worms biology

  • Thread starter username
  • Start date
  • #1
username
226
2
Here is a strange question :/
Worms wriggle up to the grounds surface when it is raining how do they know this or even what direction to go in?
 

Answers and Replies

  • #2
Phobos
Staff Emeritus
Science Advisor
Gold Member
1,954
6
I could only speculate (not having read much about worms), but it seems that there are many ways to tell (without sight, that is).

(1) The water they are fleeing is flowing (percolating) downward through the soil and filling up pore spaces. The water table rises upwards. They need only move away from the rising subsurface flood. Eventually, the hit surface.

(2) They can move against the flow of water (go up against the downward flowing water).

(3) They can move toward the looser soil (deeper soil tends to be more tightly packed).

(4) Following a temperature gradient?

(5) Following an air concentration gradient?

(6) Limited memory?

(7) Luck? (i.e., you just don't see the poor chaps that wriggle downward instead of upwards)
 
  • #3
username
226
2
They can move toward the looser soil (deeper soil tends to be more tightly packed)

I think it is probably just that, I don't imagine they have much in the way of intelligence or senses, but how do/could they reproduce ?
 

Suggested for: Worms biology

  • Last Post
Replies
15
Views
957
  • Last Post
Replies
32
Views
687
  • Last Post
Replies
4
Views
417
  • Last Post
Replies
1
Views
306
  • Last Post
Replies
1
Views
548
Replies
12
Views
1K
Replies
10
Views
951
  • Last Post
Replies
10
Views
1K
  • Last Post
Replies
1
Views
833
Replies
18
Views
2K
Top