Oparaku Nkiruka Francisca , B.O. Mgbenka

National Centre for Energy Research and Development, Zoology Department, University of Nigeria, Nsukka, Nigeria
Author    Correspondence author
International Journal of Aquaculture, 2013, Vol. 3, No. 21   doi: 10.5376/ija.2013.03.0021
Received: 09 Jun., 2013    Accepted: 27 Jun., 2013    Published: 09 Jul., 2013

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Francisca, 2013, Production of Clarias Gariepinus Fingerlings in Recirculating Systems, International Journal of Aquaculture, Vol.3, No.21 117-125 (doi: 10.5376/ija.2013. 03.0021)

Fingerling productions using recirculating system of fish pond, powered with electricity and solar panelsas power sources were carried out. Plumbing work was carried out for installation of pipes and accessories that helped in water circulation inside and outside the pond and treatment tank. Oxygen pump with air stones was installed and air stones placed in each pond to aerate the ponds continuously. The dimensions of treatment tank which was constructed with concrete were (3.4×1×1.5) m. There were four compartments in the water treatment tank each measuring (1×0.6×1.25) m. Procurements of biofilters that were arranged inside the treatment tank in the following order; bioblocks, biobrush, Maifan stones, coral sand, ceramic ring, activated charcoal and UV light. The results of the microbial analysis of the recirculating system water samples were (2.2×10³±200) cfu/mL, (6.8×10³±10) cfu/mL and (1.8×10³±10)cfu/mL for solar powered pump water, electric powered pump water, and UV treated waste water (outlet water) respectively. Oxygen values were 9.4±1.6, 6.2±0.20, 5.7±0.20, 7.2±0.15 for inlet, solar powered fish pond, electric powered fish pond and UV treated water respectively; dissolved oxygen was between 5.7 mg/L to 9.4 mg/L. Survival % was high for both systems.

Recirculating system; Clarias gariepinus; Power sources