Abstract

Present paper deals with the impact of a long photoperiod (18 h) per day for 45 days on steroid secreting interstitial cells during preparatory phase of a freshwater cat fish, Heteropnuestes fossilis (Bl.). Depending upon the histocytological structure and secretory status, interstitial cells have been grouped into four categories revealing their corresponding functional status.

Keywords:

Heteropneustes fossilis , photoperiods, preparatory phase of the reproductive cycle,

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