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Observations on a High-Level Population of Limpets

J. R. Lewis
Journal of Animal Ecology
Vol. 23, No. 1 (May, 1954), pp. 85-100
DOI: 10.2307/1661
Stable URL: http://www.jstor.org/stable/1661
Page Count: 17
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Observations on a High-Level Population of Limpets
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Abstract

1. The level which limpets reach in the upper shore is shown to be dependent upon the exposure and the aspect of a locality. The presence of algal food does not in itself lead to the occupation of higher levels. 2. Seasonal variation in the amount of sunlight experinced on a particular situation leads to: (a) the death or downward movement of limpets from very high levels in spring and summer; (b) a return upward movement of limpets in autumn and winter. 3. There is some evidence of an upward trend in the movement of young individuals. 4. Considerable variation exists in the frequency with which individual limpets move to new positions on a barnacle-free surface.

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