Techniques and hatchery procedures in induced spawning of the European common carp, Cyprinus carpio and the Chinese carps Ctenopharyngodon idella, Hypophthalmichthys molitrix and Aristichthys nobilis in Transkei Techniques and hatchery procedures in induced spawning of the European common carp, Cyprinus carpio and the Chinese carps Ctenopharyngodon idella, Hypophthalmichthys molitrix and Aristichthys nobilis in Transkei Posted in .