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- Title
Low pH Water Impairs the Tactile Sense of the Postlarvae of the Giant Freshwater Prawn Macrobrachium rosenbergii.
- Authors
Kawamura, Gunzo; Bagarinao, Teodora; Yong, Annita Seok Kian; Noor, Siti Narasidah; Lim, Leong-Seng
- 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.
- Subjects
MACROBRACHIUM rosenbergii; LARVAE; MICROPIPETTES; PH effect; MECHANORECEPTORS
- Publication
Tropical Life Sciences Research, 2018, Vol 29, Issue 1, p103
- ISSN
1985-3718
- Publication type
Article
- DOI
10.21315/tlsr2018.29.1.7