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Journal Article

Distribution of the Fiddler Crabs, Uca pugnax and Uca minax, in Relation to Salinity in Delaware Rivers

Kenneth G. Miller and Don Maurer
Chesapeake Science
Vol. 14, No. 3 (Sep., 1973), pp. 219-221
Stable URL: http://www.jstor.org/stable/1350613
Page Count: 3
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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.
Distribution of the Fiddler Crabs, Uca pugnax and Uca minax, in Relation to Salinity in Delaware Rivers
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Abstract

The distribution and abundance of the fiddler crabs, Uca pugnax and U. minax were determined in relation to salinity in three tidal tributaries of Delaware Bay, U. S. A. Only Uca pugnax was present in high salinity (21-29 ‰) while U. minax was present in lower salinities and even in fresh water. Their distributions overlapped along the salinity gradient and both species were equally abundant in salinities of 8-12 ‰. There was a statistically significant positive association between abundance and salinity for Uca pugnax and a negative association for U. minax.

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