These posts provides variety of information on African catfish, Clarias gariepinus. The artificial reproduction of the species is addressed including the sexing of broodstock, extraction of the pituitary gland, hormonal injection, ovulation, stripping, egg fertilization, and incubation. The nursing of catfish fry is covered. Also, the natural spawning is included. The farming systems of African catfish is covered.
Nov 03 2012
Credit: Worawut Koedprang (Thailand) Description: Worawut Koedprang and Abdel Rahman El Gamal African catfish (Clarias sp.) is considered a key farmed species in Thailand. The hybrid catfish (Clarias macrocephalus – female X Clarias gariepinus – male) has been favored for aquaculture because of it high growth rate compared to parent species. While Clarias macrocephalus (left photo) is native to Southeast …
Permanent link to this article: https://fishconsult.org/?p=6945
Oct 17 2012
Photo credit: Grace Charway (Ghana) Information source: Ismael Radwan (Egypt) Description: Abdel Rahman El Gamal The two photos show an innovative incubator for the eggs of African catfish (Clarias gariepinus). As shown in one of the two photos, the incubator (about 50×70 cm) is screened from the bottom and for …
Permanent link to this article: https://fishconsult.org/?p=6352
Jul 05 2012
Credit: Charles Ibinga Maganga (Gabon) Clarias gariepinus, récoltés par les femmes dans la vallée du Ntem à Minvoul (ville rurale, au nord du Gabon). Ces silures (poissons-chats) sont péchés avec des pièges à poissons (panier conique fait à l’aide des roseaux pour les eaux peu profondes) lors des périodes de remontée d’eau, en début des …
Permanent link to this article: https://fishconsult.org/?p=4149
Jun 04 2012
Credit: Alain Murekambanze (Burundi) Source: fishconsult.org The movie has been developed and owned by Kunagura Ubworozi (Burundi). This 27-minute movie includes the handling of African catfish broodstock, checking the sexual maturation, extraction of pituitary gland, adminstration of the pituitary gland extract, and the ovulation of female broodstock. The movie also presents the sacrificing of catfish …
Permanent link to this article: https://fishconsult.org/?p=3705
Apr 07 2012
Credit for the clip: Samuel Simon Zigizo (South Sudan) – Description: Abdel Rahman El Gamal This video shows the stripping of a female of African catfish, Clarias gariepinus. This practice takes place in artificial reproduction of the species and should be followed by artificial fertilization using testes taken from a sacrificed male. We are able to see …
Permanent link to this article: https://fishconsult.org/?p=3272
Mar 17 2012
Credit for the video: Emmanuel Ohene Marfo (Ghana) Description: Abdel Rahman El Gamal Such as the case with silurid fishes, it is almost impossible to hand strip the sperm from the male of African catfish, Clarias gariepinus. Therefore and as seen in this video, testes of a sacrificed male are used for the artificial fertilization of catfish eggs. Testes …
Permanent link to this article: https://fishconsult.org/?p=3023
Mar 10 2012
This project proposal has been developed by a working group who participated in Fish Culture Development training course in 2011 under the supervision of Dr. Abdel Rahman El Gamal. The main focus of this project proposal is cage farming of Nile tilapia (Oreochromis niloticus), and African catfish (Clarias sp.) in Lake Chad. The document included the …
Permanent link to this article: https://fishconsult.org/?p=2866
Dec 26 2011
The video shows the injection of an African catfish (Clarias gariepinus) female. You may notice the small-medium size of female broodstock, the place of injection (dorsal part) and covering fish eyes as a means of calming. Anesthesia may be required especially in larger broodstock. Note: the credit of these video clips goes to colleagues who …
Permanent link to this article: https://fishconsult.org/?p=2154
Nov 06 2011
The photo shows egg stripping which is a phase of the induced reproduction of African catfish (Clarias gariepinus). This female has been induced for spawning using the pituitary gland extract. The photo shows the egg stripping after the ovulation. Note how eggs are free flowing without clumps or blood. Eggs are obtained through stripping using soft …
Permanent link to this article: https://fishconsult.org/?p=1195
Nov 06 2011
Unlike many fish species, the sperm can only be obtained by sacrificing a male of African catfish (Clarias gariepinus). Testis is dissected and cut into small pieces whereas the milt used in egg fertilization will be obtained through pressing pieces of the testis out. Note: We decided not to watermark the photos in order not to upset …
Permanent link to this article: https://fishconsult.org/?p=1187
