The Common Carp (Cyprinus carpio L.) in Norway
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Abstract
Attempts have been made to introduce common carp (Cyprinus carpio L.) to at least 35 sites in Norway during the last 250 years up to 1992. At least twelve introductions occurred before 1930, but the populations were believed to be extinct in the sixties and seventies. However, natural reproduction has occurred in three of these populations during the last hundred years. Common carp have also been introduced during the last decades and is now found in about 30 lakes and ponds in southern Norway. The origin of most of the earlier introductions was Germany. Later introductions from Sweden are known and further spreading from Norwegian populations has occurred. Common carp and crucian carp (Carassius carassius) hybridize in the two lakes in Norway where they occur together.
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