next message in archive
no next message in thread
previous message in archive
Index of Subjects
On 4/27/2012 9:08 AM, V.Kirkwood xplornet.ca wrote:
> Would it have anything to do with the soil being so wet that they can't
> breathe, so they come up for air?
* that's what's been said on NatureNS, but if that's the case, why do
they move so far across pavement? Why not just emerge a bit from the
burrow and breathe from the exposed section of the body, rather than
wandering away from the safety of the hole?
Simple googling doesn't bring up an obvious answer - the one study near
the top of the search covered an area of 1 square metre. There's real
difficulties in imagining informative experiments or observations, since
surface movement by the smaller species can only be observed over
pavement, which isn't natural, and any experimental setup will take
years to settle into a natural-like conditions. Also it's hard to
imagine how one would mark Earthworms in order to achieve individual
recognition in vegetated cover.
The thing we thought of last night, at least on unnatural pavement,
would be to have a patch of lawn in a big paved area, and an overhead
camera taking pictures once every 15 seconds or so to follow the
movement of individuals away from the lawn, and to see if they circle
back to their homes or are just lost.
fred
------------------------------------------------------------
Frederick W. Schueler & Aleta Karstad
Bishops Mills Natural History Centre - http://pinicola.ca/bmnhc.htm
Mudpuppy Night in Oxford Mills - http://pinicola.ca/mudpup1.htm
Daily Paintings - http://karstaddailypaintings.blogspot.com/
South Nation Basin Art & Science Book
http://pinicola.ca/books/SNR_book.htm
RR#2 Bishops Mills, Ontario, Canada K0G 1T0
on the Smiths Falls Limestone Plain 44* 52'N 75* 42'W
(613)258-3107 <bckcdb at istar.ca> http://pinicola.ca/
------------------------------------------------------------
------------------------------------------------------------
--
You received this message because you are subscribed to the Google
Groups "NatureList" group.
To post to this group, send email to naturelist@googlegroups.com.
To unsubscribe from this group, send email to
naturelist+unsubscribe@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/naturelist?hl=en.
--
fred
------------------------------------------------------------
Frederick W. Schueler & Aleta Karstad
Bishops Mills Natural History Centre - http://pinicola.ca/bmnhc.htm
Mudpuppy Night in Oxford Mills - http://pinicola.ca/mudpup1.htm
Daily Paintings - http://karstaddailypaintings.blogspot.com/
South Nation Basin Art & Science Book
http://pinicola.ca/books/SNR_book.htm
RR#2 Bishops Mills, Ontario, Canada K0G 1T0
on the Smiths Falls Limestone Plain 44* 52'N 75* 42'W
(613)258-3107 <bckcdb at istar.ca> http://pinicola.ca/
------------------------------------------------------------
------------------------------------------------------------
next message in archive
no next message in thread
previous message in archive
Index of Subjects