ISSN:
1432-136X
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary The extracellular and intracellular fluid volumes of pondwater acclimatedLigumia subrostrata are equal (3.9 ml/g dry tissue). Total blood solute is 47 mOsm and is composed primarily of Na (19.1 mM), Cl (10.6 mM), HCO3 (12.7 mM), Ca (4.3 mM), and K (0.5 mM). Major intracellular solutes are K (14.0 mM), Na (7.0 mM) and Cl (2.4 mM).L. subrostrata continuously exposed to deionized water at 20°C exhibit a maximum decrease of 23% in extracellular fluid total solute within 30 days. The maximum [Na] and [Cl] losses are 40% and 76% respectively, while [Ca] and [HCO3] increase by 44% and 37% respectively. No apparent change in extracellular [K] occurs. Intracellular [Na] decreases 53% and [Cl] decreases 79%, but [K] declines only 15%. Intracellular fluid volume, extracellular fluid volume, and total body water decrease 17%, 31%, and 22% respectively. Inulin clearance is 0.41 ml/g dry tissue·h for pondwater acclimated mussels and declines to 0.24 ml/g dry tissue·h during salt depletion. When salt depleted mussels are returned to solutions containing Na or Cl, they experience a net uptake of salt. The accumulated ions are about equally distributed in the extra- and intracellular compartments.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00691672
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