Tanimu et al
Greener Journal of Biological Sciences Vol. 3 (3), pp. 090-098, April 2013.
© 2013 Authors
Manuscript Number: 121912338
A Comparative Study on Physico-Chemical Characteristics and Phytoplankton Abundance between a Concrete and an Earthen Fish Pond in A.B.U., Zaria, Nigeria
*Tanimu Y., Amlabu W.E. and Akanta A. A.
Department of Biological Sciences, Ahmadu Bello University, Zaria, Nigeria.
*Corresponding Author’s Email: yahuzatanimu @ gmail.com.
Fish culture is a cheap source of animal protein for many households in Nigeria and water quality is a crucial factor in fisheries. The abundance of phytoplankton and physico-chemical parameters of two fishponds in the Department of Biological Sciences, Ahmadu Bello University, Zaria, Nigeria was studied fortnightly from the month of May to July 2011. The range value (means S.E) for physico-chemical characteristics observed are; Water temperature in pond A ranged from 250C to 30.80C (28.06 1.96OC), pond B ranged from 25OC to 32.2OC (28.78 1.71OC). Electrical conductivity in pond A ranged from 0-22 us/cm (118.50 97.72) and pond B 0 to 169 us cm -1(80.20 73.67). Total Dissolved solids, pond A ranged from 0 to 112 ppm (57.25 49.25) and pond B 0 to 87 ppm (40.83 36.86). pH in pond A ranged from 5.86 to 9.11 (7.86 0.88) while pond B ranged from 4.10 to 8.46 (7.32 1.30). Hardness of water in pond A ranged from 48 to 88 mg/L (67.58 13.64) while pond B ranged from 40 to 80 mg/L (55.00 11.33). Alkalinity ranged from 10 to 22mg/L (13.42 3.78 in pond A and 3 to 22 mg/L (7.00 5.64) in pond B. Dissolved Oxygen (DO) ranged from 6. 50 60 10. 90 mg/L (8.39 1.44) in pond A and 7. 50 to 8.80 mg/L (8. 25 0.39) in pond B. Biochemical oxygen (BOD) ranged from 1.00 to 8.00 mg/L (3.85 2.36) in pond A and 0.05 to 3.70mg/L (1.56 1.09) in pond B. Phosphate-Phosphorus (PO4-P) ranged from 1.60 to 2.50 mg/L (2.16 0.34) in pond A and 1.52 to 2.50mg/L (1.97 0.35) in pond B. Nitrate-Nitrogen (NO¬3¬ – N) ranged from 1 to 33 mg/l (10.50 9.58) in pond A and 1 to 7 mg/l (3.33 2.10) in pond B. Physico-chemical parameters showed significant difference across the sampling period (p <0.05) while few others did not show significant difference (P > 0.05). The order of Magnitude in the number of individuals per litre of phytoplankton in the two ponds (A & B) are chlorophyta > cyanophyta > Bacillaciophyta. The three algal divisions observed did not vary statistically significantly between the two ponds (P>0.05). The observed statistically significant relationship between phytoplankton and physico-chemical parameters indicates that the abundance of phytoplankton is dependent on the physico-chemical parameters of the water bodies and vice versa. The results of this study show that the water in pond B is cleaner than pond A.
Keywords: Phytoplanktonic algae, Fishponds and Water quality.