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Free Content Osmoregulation in Two Species of Palaemonetes (Crustacea: Decapoda) from Florida

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Individuals of the fresh-water shrimp Palaemonetes paludosus were held in the laboratory at a variety of salinities, after which blood samples were taken and the osmotic concentration determined by the freezing-point depression method of Gross (1954). Specimens of Palaemonetes intermedius from high salinity were held at low salinity and vice-versa prior to blood sampling and determination of osmotic concentration. Results indicate that Palaemonetes intermedius is able to regulate over a wide range of salinities while regulation in P. paludosus breaks down at salinities in excess of 20‰.

Document Type: Research Article

Publication date: January 1, 1964

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