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The Barnacle, Balanus subalbidus, as a salinity bioindicator in the Oligohaline Estuarine Zone

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Abstract

The distribution and size of the barnacle Balanus subalbidus were studies along salinity gradients in coastal Louisiana and Mississippi. It was common in gradient estuaries occurring in salinities ranging from near fresh water to 16 ppt. It was the dominant barnacle species in the oligohaline zone, but at salinities above 6 ppt its relative abundance decreased and it was replaced by B. improvicus and B. eburneus. Its low-salinity limit corresponded to the boundary between the oligohaline and fresh water estuarine salinity zones and there was a high negative correlation between size (basal rostral-carinal diameter) and salinity. Its size and distribution could be used to determine prevailing salinity at a site because of its abundance and uniform distribution in oligohaline areas.

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Authors and Affiliations

  1. Department of Biological Sciences, University of New Orleans, 70122, New Orleans, Louisiana, USA

    Michael A. Poirrier & Mickel Ray Partridge

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  1. Michael A. Poirrier
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  2. Mickel Ray Partridge
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Poirrier, M.A., Partridge, M.R. The Barnacle, Balanus subalbidus, as a salinity bioindicator in the Oligohaline Estuarine Zone. Estuaries 2, 204–206 (1979). https://doi.org/10.2307/1351738

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  • DOI: https://doi.org/10.2307/1351738

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