Abstract
The lethal salinity limits (LC50 and mean survival times) of two populations of barbel, Barbus callensis, were determined. Conditions in Lake Ichkeul, Tunisia, are lethal for the fish in summer; this explains their seasonal migrations into Oued Sejnane and the other tributaries. Tolerance increased between 1984 and 1985 from LC50 = 15.6 to LC50 = 17.2 in a population from Oued Mejerdah; this may be connected with the dissolution of rock salt in the new Sidi Salem reservoir.
Published Version
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