Osmotic and cell volume regulation in the goby,Gillichthys mirabilis

✍ Scribed by Loretz, Christopher A.

• Book ID: 102890200
• Publisher: John Wiley and Sons
• Year: 1979
• Tongue: English
• Weight: 558 KB
• Volume: 210
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1402100206

✦ Synopsis

Abstract

The gobiid teleost Gillichthys mirabilis acclimated successfully to external environments ranging from 100% seawater to freshwater. Plasma composition and cell volume are regulated in both hypo‐ and hyperosmotic environments. Significant declines in plasma electrolyte concentrations and increase in intracellular hydration were observed only in freshwater‐acclimated fish. Cell volume regulation in hypoosmotic media appears to result from the loss of intracellular solutes. Hypophysectomy seriously impaired regulation of plasma composition and cell volume in dilute external environments, a finding consistent with the known role of prolactin in promoting freshwater survival of teleosts.