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Hypothesis:
Growth lines
on limpets = ‘raised ridges’ Thus a means
of comparing ages of periwinkles L sitkana – no L. scutulata maybe |
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Maybe in L
scutulata |
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Here it
looks like Littorina scutulata may have significant info where growth lines
and aging are accessible – note the differences in spacing on the larger
periwinkle to left towards it’s base |
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Close look at
L Sitkana – negative
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Smallest
sized to right at around 1 mm
Probably can’t count the ‘ridge lines’ to get age—the largest one above has fewer but wider spaced ridges – but predict it will give relative age of the sub-adults (along with size) |
Smallest seen
Note ridge
lines
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Those are full grown adults |
Created by LG on APR/23/2005
Last updated on Saturday, April 23, 2005