Effects of pH Variations on Growth and Haematological Parameters of Pangasianodon hypophthalmus (Sauvage, 1878)
R. S. Sravani
Department of Fisheries Resource Management, College of Fishery Science, Andhra Pradesh Fisheries University, Muthukur, SPSR Nellore District, Andhra Pradesh, India.
A. Balasubramanian *
Department of Fisheries Resource Management, College of Fishery Science, Andhra Pradesh Fisheries University, Muthukur, SPSR Nellore District, Andhra Pradesh, India.
T. Suguna
Department of Fisheries Resource Management, College of Fishery Science, Andhra Pradesh Fisheries University, Muthukur, SPSR Nellore District, Andhra Pradesh, India.
R.R. Anupama
Department of Aquatic Environment Management, College of Fishery Science, Andhra Pradesh Fisheries University, Muthukur, SPSR Nellore District, Andhra Pradesh, India.
Mohana Swapna Narra
Department of Fisheries Resource Management, College of Fishery Science, Andhra Pradesh Fisheries University, Muthukur, SPSR Nellore District, Andhra Pradesh, India.
M. Rajani
Department of Fisheries Economics and Statistics, College of Fishery Science, Andhra Pradesh Fisheries University, Muthukur, SPSR Nellore District, Andhra Pradesh, India.
Ch. Lavanya
Department of Aquatic Animal Health Management, College of Fishery Science, Andhra Pradesh Fisheries University, Muthukur, SPSR Nellore District, Andhra Pradesh, India.
*Author to whom correspondence should be addressed.
Abstract
An experiment was carried out with an aim of enhancing culture of Pangasianodon hypophthalmus. Juveniles with an average length of 13.35±0.14 cm and 17.52±0.16 g of body weight were subjected to various pH levels of 7.5 (Control), 6, 9 and 9.5 to determine their growth and hematological changes. The control group exhibited the highest growth in both length (14.70±1.04 cm) and weight (21.12±2.67 g), while the lowest length (13.87 ± 0.43 cm) and weight (18.92 ± 1.11 g) in pH 9.5. The highest (1.24 ± 0.15) and lowest (0.56 ± 0.15) value of SGR was noticed in control and pH 9.5 respectively. The highest value of PER (3.79 ± 0.38) was observed in control and the lowest (1.66 ± 0.31) in pH 9.5. The highest (2.59 ± 0.47) and lowest (1.11 ± 0.16) value of FCR observed in pH 9.5 and control respectively. The highest count (26.80 ± 1.01 (103/µl)) of TLC was observed in pH 9.5 and the least (22.26 ± 0.53 (103/µl)) in control. The highest count (2.47 ± 0.15 (106/µl)) of TEC was observed in control and the least (1.97 ± 0.23 (106/µl)) in pH 9.5. The highest value (9.42 ± 0.14 g/dL) of Hb was observed in control and the least (9.5 with 5.77 ± 0.56 g/dL) in pH 9.5. The highest value (29.06 ± 0.46%) of Ht was observed in control and the least (22.41 ± 2.11%) in pH 9.5. The highest value (124.93 ± 9.99 fL) of MCV was observed in pH 9 and the lowest (114.45 ± 11.98 fL) in pH 9.5. The highest value (32.42 ± 0.76 g/dL) of MCHC was observed in control and the lowest (25.73 ± 0.87 g/dL) in the pH 9.5. The study revealed that P.hypophthalmus juveniles showed significant difference (p < 0.05) between the control and treatments. Study inferred that alterations in the growth and haematological parameters were occurred at higher pH levels compared to lower pH levels.
Keywords: Growth, haematology, Pangasianodon hypophthalmus, pH