Shankar D S, Kulkarni R S
Fish Endocrinology Research Unit, Department of Zoology, Gulbarga University, Gulbarga-585 106, India.
J Environ Biol. 2005 Oct;26(4):701-4.
The tissue cholesterol and serum cortisol changes during four reproductive phases has been studied in the freshwater fish Notopterus notopterus of male sex during four phases, preparatory (January - March), prespawning (April - May), spawning (August - September) and post spawning (November - December). The cholesterol content of the testis and liver increased during preparatory phase and maximum content of cholesterol was during spawning phase. The serum cortisol estimated by radioimmunoassay (RIA) technique which indicated that the level of the hormone was high during pre-spawning and spawning phases compared to other two phases. The increase in cholesterol during preparatory and spawning phases may be because of increase in cortisol synthesis needed for testicular growth and spermetogenesis during these phases. The gonadosomatic index (GSI) also increased during these phases.
已对雄性淡水鱼类印度长臀鲃在四个生殖阶段，即准备期（1月至3月）、产卵前期（4月至5月）、产卵期（8月至9月）和产卵后期（11月至12月）期间的组织胆固醇和血清皮质醇变化进行了研究。睾丸和肝脏中的胆固醇含量在准备期增加，且胆固醇含量在产卵期最高。通过放射免疫分析（RIA）技术测定的血清皮质醇表明，与其他两个阶段相比，该激素水平在产卵前期和产卵期较高。准备期和产卵期胆固醇增加可能是因为这两个阶段睾丸生长和精子发生所需的皮质醇合成增加。这些阶段的性腺指数（GSI）也有所增加。
