Improvements in the large scale artificial propagation of the sharptooth catfish, Clarias gariepinus (Burchell), in South Africa

Author: L. Polling, B.C.W. van der Waal & H.J. Schoonbee
Year: 1987
Issue: 4
Volume: 17
Page: 176 - 180

Induced spawning procedures developed under local conditions in the Transvaal for the sharptooth catfish, Clarias gariepinus, using a combination of the chorionic gonadotrophin Chorulon with pituitary gland homogenate from the European common carp, Cyprinus carpio, or from C. gariepinus donors, are described. Egg-hatching procedures in which the glutinosity of the fertilized eggs of C. gariepinus are first neutralized using a full-cream powdered milk solution and then hatched in funnels, are compared with a method in which the eggs are directly transferred to nylon screens in trout-hatching trays after fertilization. The hatching trays proved superior and the advantages of this method are discussed

Keywords: chorionic gonadotropin, Clarias gariepinus, Induced spawning of fish, pituitary hormones, trout-hatching trays
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