Effect of 20-OH ecdysone and methyl farnesoate on histomorphology of the Y-organ during late intermoult and postmoult stages in the freshwater crab Travancoriana schirnerae Bott, 1969 (Crustacea: Gecarcinucidae)

Abstract This study investigated the effects of 20-OH ecdysone (20E) and methyl farnesoate (MF) administration on histomorphology of the Y-organ (YO) during late intermoult (C3 and C4) and early postmoult stages in the edible freshwater crab Travancoriana schirnerae Bott, 1969, widely distributed in the wetlands of Wayanad, Kerala, India. Histomorphological analyses of the 20E and MF administered crabs revealed that both 20E and MF were effective in inducing significant changes in YO during the late intermoult (P