Production of Organic Fingerlings ofAfrican catfish (Clarias gariepinus)

  • B.O. Omitoyin University of Ibadan, Nigeria. ABSTRACT Organic fingerlings of C. gariepinus were produced using pituitary gland of fish to induce ovulation. Fry obtained were then raised to fingerlings using rotifers, a natural live food (Zooplankton) produced from aquaculture waste effluent. Final mean weight and survival of organically produced fingerlings were significantly lower (P<0.05) 0.35±0.14 g and 18.3±57.07% compared with those produced inorganically 0.70±0.0 g and 41.3±5.66% respectively.At the end of the first week of feeding it was observed that organically raised fry performed better than those raised on Artemia. This trend however changed between the second and third week with fry fed artemia performing better than those fed rotifers. This might be as a result of insufficient natural food for the organically raised fry which eventually led to cannibalism, reduced growth and lower survival. Over 95% of natural food fed to fry was B. calyciflorus anuraeiformis, B. c. calyciflorus and B. c. amphiceros produced from aquaculture effluent. Keywords: organic fingerlings, African Cat fish, pituitary gland, ovulation. Received: 10 June 2011 Accepted: 18 July 2011 Corresponding author: bam_omitoyin@yahoo.com 2 Hydrobiology and Fisheries Unit, Department of Zoology, University of Ibadan, Nigeria
  • A.A . Sowunmi University of Ibadan, Nigeria
  • S. A. Omitoyin Bowen University Iwo, Osun State
Keywords: organic fingerlings, African Cat fish, pituitary gland, ovulation

Abstract

Organic fingerlings of C. gariepinus were produced using pituitary gland of fish to induce ovulation. Fry obtained were then raised to fingerlings using rotifers, a natural live food (Zooplankton) produced from aquaculture waste effluent. Final mean weight and survival of organically produced fingerlings were significantly lower (P<0.05) 0.35±0.14 g and 18.3±57.07% compared with those produced inorganically 0.70±0.0 g and 41.3±5.66% respectively.At the end of the first week of feeding it was observed that organically raised fry performed better than those raised on Artemia. This trend however changed between the second and third week with fry fed artemia performing better than those fed rotifers. This might be as a result of insufficient natural food for the organically raised fry which eventually led to cannibalism, reduced growth and lower survival. Over 95% of natural food fed to fry was B. calyciflorus anuraeiformis, B. c. calyciflorus and B. c. amphiceros produced from aquaculture effluent.

Author Biographies

B.O. Omitoyin, University of Ibadan, Nigeria. ABSTRACT Organic fingerlings of C. gariepinus were produced using pituitary gland of fish to induce ovulation. Fry obtained were then raised to fingerlings using rotifers, a natural live food (Zooplankton) produced from aquaculture waste effluent. Final mean weight and survival of organically produced fingerlings were significantly lower (P<0.05) 0.35±0.14 g and 18.3±57.07% compared with those produced inorganically 0.70±0.0 g and 41.3±5.66% respectively.At the end of the first week of feeding it was observed that organically raised fry performed better than those raised on Artemia. This trend however changed between the second and third week with fry fed artemia performing better than those fed rotifers. This might be as a result of insufficient natural food for the organically raised fry which eventually led to cannibalism, reduced growth and lower survival. Over 95% of natural food fed to fry was B. calyciflorus anuraeiformis, B. c. calyciflorus and B. c. amphiceros produced from aquaculture effluent. Keywords: organic fingerlings, African Cat fish, pituitary gland, ovulation. Received: 10 June 2011 Accepted: 18 July 2011 Corresponding author: bam_omitoyin@yahoo.com 2 Hydrobiology and Fisheries Unit, Department of Zoology, University of Ibadan, Nigeria

Department of Wildlife & Fisheries Management

A.A . Sowunmi, University of Ibadan, Nigeria

Hydrobiology and Fisheries Unit, Department of Zoology

S. A. Omitoyin, Bowen University Iwo, Osun State

Department ofAnimal Science and Fisheries

Published
2011-05-24
Issue
Vol 3 (2011): Vol. 3
Section
Articles