* ICLARM is now known as WorldFish Center

Naga - The *ICLARM Quarterly
Vol. 23, No. 1 (January - March 2000)

Network of Tropical Aquaculture Fisheries Professionals (NTAFP) Section

Aquabyte (Aquaculture Section of NTAFP)

River-based Artificial Propagation of the African Catfish Clarias gariepinus: an Option for the Small Fish Farmer
H. Charo and W. Oirere

A cheap method of propagating the African catfish, Clarias gariepinus, by incubating the fertilized eggs in a cage placed directly in a flowing river is described. Hatching ranged between 39 and 70%. This is not significantly different from the commonly used water recirculating flow through system. The economic advantages of the river hatching method are discussed with special emphasis on the rural fish farmers.

H. Charo and W. Oirere are from the KMFRI-Sangoro Research Centre, P.O. Box 136, Pap-Onditi, Kenya.

Bioconversion Efficiency and Growth in the White Shrimp, Penaeus indicus (Milne Edwards), Fed with Decomposed Mangrove Leaves
S. Athithan and V. Ramadhas

Food conversion efficiency and growth in the white shrimp Penaeus indicus fed with decomposed mangrove leaves of Avicennia marina and A. officinalis were monitored under laboratory conditions. It was observed that test animals fed with the decomposed leaves of A. marina had higher assimilation efficiency (87.96%), gross growth efficiency (10.82%), net growth efficiency (12.3%) and relative growth rate (0.0603 g/day) than those fed with A. officinalis. The relatively higher growth registered in the animals fed with decomposed leaves of A. marina was attributed to its high calorific and protein content.

S. Athithan and V. Ramadhas are from the Fisheries College and Research Institute, Tuticorin - 628 008, India. 

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