Translator Disclaimer
1 May 2011 Osmoregulation in Hypogean Populations of the Freshwater Amphipod, Gammarus pulex (L.)
Author Affiliations +
Abstract

The freshwater amphipod Gammarus pulex is widely distributed in freshwater streams and rivers of Europe. This amphipod also has isolated hypogean populations, which are transparent in appearance, suggestive of adaptation to their cave environment. Since cave habitats are often food limited, physiological adaptations have been observed that reduce the energy expenditure of cave organisms. Osmoregulation is an energetically expensive mechanism that allows gammarids to survive in fresh water. This study tested the hypothesis that differences in osmoregulation existed between hypogean and epigean populations of G. pulex. The osmoregulatory parameters measured were haemolymph cation concentrations, water and sodium fluxes and gill Na /K -ATPase activity. The hypogean G. pulex had significantly lower haemolymph sodium and potassium concentrations, but had a significantly higher haemolymph ammonium concentration than the epigean G. pulex. The low food availability in the hypogean environment was considered to be the underlying cause for these differences in haemolymph ion concentrations.

Steven J. Brooks and Chris Lloyd Mills "Osmoregulation in Hypogean Populations of the Freshwater Amphipod, Gammarus pulex (L.)," Journal of Crustacean Biology 31(2), 332-338, (1 May 2011). https://doi.org/10.1651/10-3336.1
Received: 5 May 2010; Accepted: 1 August 2010; Published: 1 May 2011
JOURNAL ARTICLE
7 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top