Histological Changes in the Vital Organs of Labeo rohita Acclimated to Increased Temperatures and Exposed to Critical Temperatures

The present research study describes histological aberrations in the vital organs namely, kidney, liver and gill of Labeo rohita advanced fingerlings acclimated at 26 (Control), 31, 33 and 360C for 30 days, and those exposed to the Critical Thermal Maxima (CTMax) (40.63 ± 0.170C) and Critical Thermal Minima (CTMin) (13.73 ± 0.07 0C) (temperature increased or decreased at the rate of 0.30C/min from 260C). Fish acclimated at 26, 31 and 33oC showed normal histoarchitecture. However, fish acclimated at 36oC and those exposed to CTMax and CTMin showed damaged gill lamellae, hepatic hypertrophy and renal hyperplasia. Our report on histopathological aberrations in the important organs at higher acclimation temperatures (360C) and during acute thermal changes (CTMax and CTMin) will help to monitor health and proper management of L. rohita culture during climate change scenario.