Summary
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1.
The electrolyte concentration and water content of plasma and muscle have been measured during adaptation to fresh water, after transfer from 300% sea water.
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2.
The process of adaptation can be divided into three phases.
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A.
The first hour after transfer are characterized by a rapid loss of electrolytes from plasma and muscle, and a decrease of water content in plasma, and increase in the water content of the muscle.
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B.
The period 1 to 48 hours after transfer is characterized by a reduced loss of electrolytes, together with further increase of water in muscle.
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C.
The period beginning 48 hours after transfer is characterized by an increase of electrolytes in plasma and muscle, together with decrease of water content in muscle, until equilibrium is reached.
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3.
Changes in “Chloride space” and electrolyte distribution in muscle were also observed.
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Lotan, R. Osmoregulation during adaptation to fresh water in the euryhaline teleostAphanius dispar rüppell (Cyprinodontidae, pisces). J. Comp. Physiol. 87, 339–349 (1973). https://doi.org/10.1007/BF00695268
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DOI: https://doi.org/10.1007/BF00695268