Use of the pituitary glands of the sharptooth catfish Clarias gariepinus in the induced spawning of the European common carp Cyprinus carpio and the Chinese grass carp Ctenopharyngodon idella Use of the pituitary glands of the sharptooth catfish Clarias gariepinus in the induced spawning of the European common carp Cyprinus carpio and the Chinese grass carp Ctenopharyngodon idella Posted in .