Low pH water impairs the tactile sense of the postlarvae of the giant freshwater prawn Macrobrachium rosenbergii

Gunzo Kawamura, and Teodora Bagarinao, and Annita Seok Kian Yong, and Siti Narasidah Noor, and Leong-Seng Lim, (2018) Low pH water impairs the tactile sense of the postlarvae of the giant freshwater prawn Macrobrachium rosenbergii. Tropical Life Sciences Research, 29 (1). pp. 103-112. ISSN 0128-4541

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Abstract

The effect of low pH on the tactile sense of Macrobrachium rosenbergii postlarvae was determined in the laboratory by means of two behavioural assays: shelter (netting) occupancy and jumping response to touch stimuli (taps) by a glass micropipette. The postlarvae were acclimated to pH 4, pH 5, pH 6 and pH 7.5 (control) in 45 L aquaria 5–7 d before the experiments. Shelter occupancy decreased with pH and was significantly lower at pH 4 and pH 5 than at pH 6 and in the control. The jumping response instantly followed a tap 93–98% of the time in the control, pH 6 and pH 5 treatments. However, the postlarvae showed significantly lower jumping response (65%) at pH 4, indicating an impaired tactile sense. Low pH 4–5 probably degrades the chitin of the sensory setae and inhibits the surface mechanoreceptors of the prawn postlarvae.

Item Type: Article
Uncontrolled Keywords: Mechanoreceptor, Touch Stimulus, Escape Jumping, Shadow Photography
Subjects: T Technology > TR Photography
Depositing User: MR OTHMAN HJ RAWI
Date Deposited: 24 Jun 2019 00:30
Last Modified: 24 Jun 2019 00:30
URI: http://eprints.ums.edu.my/id/eprint/22290

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