Salinity tolerance and sodium balance in the prawn Palaemonetes vulgaris (say) compared with P. pugio

Robert E. Knowlton, Richard H. Schoen

Research output: Contribution to journalArticle

Abstract

1. 1. Larvae (first zoeae) of Palaemonetes vulgaris are relatively stenohaline (optimum salinity = 20%.), adults euryhaline (96-hr LD50 values: 0.8 and 51%.). 2. 2. The concentration of blood sodium remains nearly constant over the salinity range 5-45%. 3. 3. Adult P. vulgaris are less tolerant of dilute (1-20%.) media than sympatric P. pugio but equally tolerant of higher salinities (35-45%.). Palaemonetes vulgaris maintains a slightly more constant and higher (average) sodium concentration in the blood than P. pugio. 4. 4. It is suggested that these differences contribute to habitat partitioning of these species and that they reflect the greater affinity of P. vulgaris for a euhaline milieu.

Original languageEnglish (US)
Pages (from-to)519-524
Number of pages6
JournalComparative Biochemistry and Physiology -- Part A: Physiology
Volume79
Issue number4
DOIs
StatePublished - 1984
Externally publishedYes

ASJC Scopus subject areas

  • Physiology

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