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Title: Interrenal responses to high ambient temperature in soft-shelled turtle, Lissemys punctata punctata
Authors: Ray, Prajna Paramita
Maiti, B R
Keywords: Interrenal response;Lissemys puctata punctata;Nuclear hypertrophy;Temperature;Turtle
Issue Date: Aug-2003
Publisher: NISCAIR-CSIR, India
Abstract: An exposure to ambient temperature of 25°C had no perceptible effect on interrenal function but further increase of temperature to 35°C caused nuclear hypertrophy with increase of nuclear diameter. RNA concentration, acid phosphatase, and alkaline phosphatase activities, accompanied by quantitative depletions of cholesterol (free esterified and total) and ascorbic acid levels in the interrenal gland of the soft -shelled turtle Lissemys  p. punctata. Similar manifestations of , stimulation, except in the nucleus, were marked after exposure to 38°C, but the degree of response in respect of esterified and free cholestrol levels was higher at 38°C than at 35°C. Moreover, withdrawal of 38°C temperature and subsequently maintaining at 25°C for 15 days showed reverse manifestations to those of 35°C/38°C, leading to a tendency towards normalcy. It is suggested that high a ambient temperature of 35°C significantly stimulates interrenal function of Lissemys turtles, but further increase of 38°C does not cause further overall stimulation, and withdrawal of higher temperature (38°C) shows a tendency towards normalcy. It is also suggested that (a) high ambient temperature causes thermal stress, (b) it is reversible and (c) it acts on interrenal activity presumably via CRF-ACTH-axis in turtles.
Page(s): 880-884
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.41(08) [August 2003]

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