Effect of Rearing Periods on the Production of Hybrid Catfish (Clarias gariepinus x Heterobranchus longiflis) Fingerlings

  • F. O. NWADUKWE African Regional Aquaculture Centre, Aluu, Port Harcourt, Nigeria, Department of Animal and Environmental Biology, University of Port Harcount, Nigeria.
  • I. G. NAWA African Regional Aquaculture Centre, Aluu, Port Harcourt, Nigeria, Department of Fisheries, Rivers State University of Sceince and Technology, Port Harcourt, Nigeria.
Keywords: Clarias gariepinus, Heterobranchus longifilis, F1 hybrid.

Abstract



Fingerling production of hybrid catfish (Clarias gariepinus x Heterobanchus longifilis) was investigated over three rearing periods of 3 weeks, 4 weeks and 5 weeks in fertilized earthen ponds during the rainy season. At harvest, fingerling mean weight was directly related to length of rearing period, while survival rate and production were inversely related to rearing duration. Statistical analysis showed that rearing duration was highly significant in survival rate (P < 0.05) and fingerling mean weight (P > 0.05). Size differentiation was observed in all the harvests.

Journal of Aquatic Sciences Volume 15, April 2000, pp. 23-26

KEY WORDS:

Clarias gariepinus, Heterobranchus longifilis, F1 hybrid.
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eISSN: 0189-8779