Name: Alyssa P.
If I were to measure the snail height, width, and
diameter once a week for two months would I be able to see a difference
in their shell size in the time span of those two months? If not, how
long would it take to see a difference in their size?
It will depend on the species of snail, its age, and environmental conditions. This paper
documented growth of a marine snail, measured carefully with a 0.1 mm caliper over a period
of several months:
This page shows some pictures of regrowth of a damaged snail shell:
In sum, for most healthy snails, if you use a very small measuring device, probably yes.
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Update: June 2012