Growth rates of Tilapia esculenta Graham and Tilapia zillii (Gervais) under cultivation in ponds at Nyegezi, Tanzania.
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Date
1973
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Aquaculture in Tanzania is still on a subsistence level and most of the ponds are maintained as a part time job. The ponds are too small, shallow and over crowded with stunted tilapia spp. In the present paper the results of experi mentsconducted in ponds at Nyegezi with T. esculenta and T. zillii are presented. This was part of an overall project of developing techniques of fish culture with Tilapia under the limitted existing conditions at Nyegezi. In a mono -species culture experiment with Tilapia zilli~, in nihe month's time an average size of 172.8 mm/ 115.0 g was attained. In another experiment with T. zillii and T. ~ lenpain thirteen month's time, T. zillii attained an average size of 180.2 rom/ 106.6 g and T. escu1enta 193.6 mm/118.8 g. In another experiment with intensive feeding schedule an average si.ze of 179.3 mm/ 126.6 g was attained by T. zillii and 191.0 rom/ 125.0 g by T. esoulenta, in four month's time.Publisher or University
Freshwater Fisheries Institute