EFFECT OF SUBLETHAL CONCENTRATION OF ARTIFICIAL SEAWATER ON OXYGEN UPTAKE AND OPERCULAR FREQUENCY IN AN INDIAN MAJOR CARP, LABEO ROHITA (HAM.)
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Authors
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Keshav Kumar Jha
Department of Zoology, Jawaharlal Nehru College,
Pasighat- 791 103, India
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Tapan Kumar Ghosh
Ichthyology Research Laboratory, University Department of Zoology.
T. M Bhagalpur University, Bhagalpur- 812 007, India
Abstract
The present study reports the effect of artificial seawater on oxygen uptake and opercular frequency in an Indian major carp, Labeo rohita. Whereas a control fish of 7.34 g average body weight consumed 1.538 ml 0 2. h-\ the 24-h and 96-h exposed fish of the same body weight consumed 1.07 4 and 0.897 ml 0 2• h-\ respectively. The oxygen uptake per unit body weight under controlled condition was 0.219 ml. g-1
• h-\ whereas in 24-h and 96-h exposed fish, it was 0.152 and 0.124 ml. g-\ h-\ respectively. The change in opercular movement in 24-h exposed fish was 7 .67o/o higher, whereas in 96-h exposed fish, it was 22.43 o/o
higher as compared to the control one. All changes are highly significant (p <Â 0.001).
Keywords: Sublethal concentration, artificial seawater, oxygen uptake,
opercular frequency, Labeo rohita
