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Effect of thermal stress on the neurosecretory cells of the freshwater prawn, macrobrachium kistnensis (Tiwari)

Research paper by R. Nagabhushanam, M. M. Hanumante, Meena Mirajkar, G. K. Kulkarni

Indexed on: 01 Feb '79Published on: 01 Feb '79Published in: Hydrobiologia



Abstract

The brain and thoracic ganglion neurosecretory cells of the freshwater prawn, M. kistnensis displayed characteristic changes following 24 hr exposure to warm (31.0° ± 0.5°C) and cold (13.0° ±0.5°C) stress. ‘A’ and ‘B’ cells from the brain showed significant elevation in their nuclear diameters after warm and cold stress. Warm stress depressed whereas cold stress enhanced the neurosecretory material intensity of ‘A’ cells. However, the intensity of ‘B’ cells neurosecretory material remained unaltered following both treatments. On the contrary nuclear diameters of both ‘A’ and ‘B’ neurosecretory cell significantly decreased and an increment in neurosecretory material intensity was revealed in the thoracic ganglion of both warm and cold stressed prawns.