ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] In adults, growth lines are the outer edges of growth layers within the shell. The cyclic nature of these layers has been studied by Barker2, who concluded that the five orders of layers represented growth cycles with periods of approximately 6 h, 24 h, 15 days, 6 months and 1 yr. He suggested that ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/217683a0
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