Effect of Thiourea on Migratory Activity of Climbing Perch Anabas testudineus and Food Consumption
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The effect of thiourea (exposure to 0.05% solution) on the migratory activity of the climbing perch Anabas testudineus has been studied. It is established that thiourea simultaneously affects two components of the migratory behavior of climbing perch: rheoreaction and frequency of jumps out of water. Thiourea stimulates (by 27%) movement of specimens against the current and increases (by 31%) the frequency of jumps out of water. The effect of the substance is manifested on the fifth day of exposure, while specimens almost completely stop feeding on the twelfth day. Starvation caused by thiourea may play a crucial role in the effect of thiourea on the migratory activity of climbing perch.
Keywords:climbing perch Anabas testudineus migrations rheoreaction jumps food consumption thiourea
We are grateful to the personnel of the Coastal Department of the Russian-Vietnamese Tropical Research and Technological Center, in particular Tran Duc Dien for assistance in collecting the material, M.M. Sharova (Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences) for assistance in processing the material, A.O. Kasumyan (Moscow State University), and V.V. Kostin, and D.D. Zvorykin (Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences) for valuable comments on the manuscript.
The study was supported by the Program of Fundamental Investigations of the Presidium of the Russian Academy of Sciences “Biodiversity of Natural Ecosystems and Biological Resources of Russia” and the “Russian-Vietnamese Tropical Research and Technological Center” (program Ecolan 3.2).
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