Related Experiment Video
Updated: Aug 18, 2026

Healthy Brain-pituitary Slices for Electrophysiological Investigations of Pituitary Cells in Teleost Fish
Published on: August 16, 2018
Hyperosmotic acclimation in the leech, Hirudo medicinalis L.: energy metabolism, osmotic, ionic and volume regulation
1Institut für Tierphysiologie, Freie Universität Berlin, F.R.G.
Abstract:
1. Acclimation of Hirudo medicinalis L. to hyperosmotic medium (12/1000 salinity) is characterized by changes in energy metabolism. A transient succinate fermentation is followed by malate accumulation in the tissue from the control level of 41.4 +/- 7.6 to 82.8 +/- 15.4 mumol/g dry weight after 9 days. 2. Initial osmotic water loss of 40% is restored in the intravasal space by isosmotic volume regulation after 9 days, but restoration is incomplete in the tissue even after 6 weeks of acclimation. 3. Elevation of SCCA anions in the blood is a mechanism of chloride hyporegulation.
Related Concept Videos
Tonicity in Animals
Osmoregulation in Fishes
What Are Osmoregulation and Excretion?
Tonicity in Animals
Regulation of Water Intake
Physiology of the Genitourinary System II: Tubular Reabsorption and Secretion

