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Behavior of Narceus americanus (Diplopoda) on Slopes and Its Ecological Significance

Robert V. O'Neill
The American Midland Naturalist
Vol. 77, No. 2 (Apr., 1967), pp. 535-539
DOI: 10.2307/2423363
Stable URL: http://www.jstor.org/stable/2423363
Page Count: 5
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Behavior of Narceus americanus (Diplopoda) on Slopes and Its Ecological Significance
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Abstract

Laboratory experiments confirmed field observations that Narceus americanus will respond to the moisture of its feeding substrate, decayed wood in logs, by moving uphill when the water content exceeds 70% and downhill when it is drier. Natural drainage patterns make logs on the upper slopes dry relative to those on lower slopes. The reversal of reaction may operate to bring the animals into contact with the presumed optimum feeding and substrate conditions.

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