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Feeds for catfish (Clarias batrachus Linn.) fry

Programme for the Development of Pond Management Techniques and Disease Control

Year of publication 1981

Pages P.14

Author Samran Dhamrongrat and Prasit Kasesunchi;Fisheries and Aquaculture Management Division

Product type Project

Edition 1

Synopsis (short abstract) Bioled rice bran, Moina sp., boiled tilapia flesh, fresh chub mackerel viscera and fresh pig blood were tested as feeds for raising fry of pla duk dan (Clarias batrachus). The fry, averaging 0.233 to 0.316 g, were reared in pottery water jars containing 5 l of water that was exchanged every two days. The feeds were applied at the rate of 5% of the body weight of the fry/day. At the end of the 65 day trials the best growth gains, ranging from 0.51 to 0.82 grams/fish, were attained with the Moin a, tilapia and mackerel feeds. Average weight gains with the rice bran and pig blood feeds were 0.35 and 0.38 grams/fish, respectively. Survival was relatively high in all cases, ranging from 71 to 92%. The highest net production in each trial was with mackerel feed, being the equivalent of 10.6 kg/m3 in trial No.1 and 6.5 kg/m3 in trial No.2; the corresponding values for tilapia feed were 8.1 and 6.0 kg/m3 while net production on Moina feed in trial No.1 only was 9.9 kg/m3. Reasons to account for differences in growth and production results for the same treatment, between trials, were not evident.

Cite this content as:

Dhamrongrat, S.; Kasesunchi, P. 1981. Feeds for catfish (Clarias batrachus Linn.) fry. Bangkok (Thailand). 14 p.

Language English

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    Due to the difficulties of Tilapia culture in Africa, particularly, those resulting from overproduction and consequent stunting in growth, attention was focused on another African fish group, which included the large size African catfish, Clarias gariepinus (Burchell, 1882). For pond culture of this species initial attempts were made at the end of sixties and beginning of seventies. The main delimitation of pond culture of it was the inadequate supply of seed at that time (Hogendoorn, 1979). I n the past two decades, methods of fish seed production, intensive and pond rearing of Clarias gariepinus were developed. These studies were made mainly in Central African Republic, the Netherlands and Israel (Viveen et al., 1986). Moreover, necessary taxonomical and biological examination of the African catfish group were carried out in the same period, which revealed that Clarias lazera and Clarias gariepinus so long considered as two separate species, were same and hence they came under the s ame scientific name Clarias gariepinus (Burchell, 1822) (Janssen, 1987). Outside its natural habitat the species is cultured in cooling water of power stations in the Netherlands and also in hot springs in Hungary. The species was also introduced in Thailand, and China. At the end of 1989 the African catfish was introduced in Bangladesh from Thailand by the Ministry of Fisheries and Livestock, Government of Bangladesh. The African catfish (it is known as African magur in Bangladesh) is simil ar to a few Asian catfish species as Clarias batrachus and Clarias macrocephalus. The main distinguishing feature of the species is the shape of occipital process of skull (Figure 1).
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