International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2015, Volume : 3, Issue : 5
First page : (73) Last page : (81)
Article doi: http://dx.doi.org/10.18782/2320-7051.2114
Role of Cortisol and its Effect on Male freshwater fish Notopterus notopterus (Pallas) during four Reproductive phases
D.S. Shankar1*, Aarti Sharma2 and R.S. Kulkarni3
1Central Institute of Educational Technology, NCERT, New Delhi
2Regional Institute of Education, Ajmer, Rajasthan
3Gulbarga University, Gulbarga, Karnataka
*Corresponding Author E-mail: dssrie@gmail.com
Abstract
In the present study serum cortisol level was estimated by radioimmunoassay (RIA) method in thefreshwater fish Notopterus notopterus in a single day and also during four reproductive phases. The results indicates that during morning hours 8.30 am (15.75 ± 0.383) cortisol level is low while afternoon 13.30pm (21.08 ± 0.71) and evening 20.30pm (25.50 ± 0.76) hours serum cortisol level is higher. The fish N.notopterus, fed in the morning hours and metabolic activity increases during afternoon and evening hours probably resulting in the increase of serum cortisol level. The reproductive phases were categorized based on the morphology of the gonads observed during different periods. The cortisol estimation during four phases of the reproductive phases indicates that in control fish cortisol level increases during preparatory pre-spawning and spawning. The cortisol administration during preparatory pre-spawning and spawning phases may be because of energy requirements for spermatogenesis and spermiation activities. The cortisol administration during four reproductive phases and estimation of serum cortisol level a day after administration indicate that during preparatory and pre-spawning phases serum cortisol decreases’ from that of control. The decrease in serum cortisol indicates its utilization for energy release needed for reproductive activity.
Key words: Notopterus notopterus, cortisol, hormone, reproductive phases
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Shankar, D.S., Sharma, A. and Kulkarni, R.S., Role of Cortisol and its Effect on Male freshwater fish Notopterus notopterus (Pallas) during four Reproductive phases, Int. J. Pure App. Biosci. 3 (5): 73-81 (2015). doi: 10.18782/2320-7051.2114
