Ultrastructural Alterations in the Gills of Labeo rohita Fingerlings Exposed to Thermal Extremes. (11th March 2013)

• Record Type: Journal Article
• Authors: Das, T.; Sahu, N. P.; Chakraborty, S. K.; Chatterjee, N.; Mohammed, M. S.; Dalvi, R. S.; Baruah, K.; Pal, A. K.
• Is Part Of: Anatomia, histologia, embryologia. Volume 43:Number 1(2014:Feb.)
• Page Start: 75
• Page End: 80
• Publication Date: 2013-03-11
• Subjects: Anatomy, Comparative -- Periodicals; Veterinary anatomy -- Periodicals; Veterinary histology -- Periodicals; Veterinary embryology -- Periodicals; 636.089
• DOI: 10.1111/ahe.12039
• Languages: English
• ISSNs: 0340-2096

Abstract

<abstract abstract-type="main" id="ahe12039-abs-0001"> <title>Summary</title> <p>This study aimed to determine the cellular alterations in the gill of <italic>Labeo rohita</italic> exposed to lethal temperature maxima (LT_M_ax) and lethal temperature minima (LT_M_in) by means of transmission electron microscopy (TEM). Acclimation of advanced fingerlings of <italic>L. rohita</italic> was carried out at 26°C for 30 days. Acclimated fish were subjected to a constant rate of increase or decrease in temperature (0.3°C/min) until the LT_M_ax and LT_M_in values were reached. Dissected gills were processed for TEM, both at the end of acclimation period at ambient temperature (26°C) and at lethal temperatures. Results indicated that at ambient temperature, the gill tissues appeared normal. However, significant changes were observed at lethal temperatures. The gill tissues at lethal temperature maxima showed severely damaged lamellae, with more vacuolated space. At lethal temperature minima, gill tissues showed increased density of mitochondria. Our <italic>prima‐facie</italic> report indicated that <italic>L. rohita</italic> exposed to lethal temperatures exhibited marked ultrastructural changes in the gills.</p> </abstract>