Age and serotonin effects on locomotion in marine trematode cercariae
- Authors: Tolstenkov O.O.1, Prokofiev V.V.2, Pleskacheva M.V.3, Gustafsson M.K.4, Zhukovskaya M.I.5
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Affiliations:
- A. N. Severtsov Institute of Ecology and Evolution
- Pskov State University
- Lomonosov Moscow State University
- Department of Biosciences
- Sechenov Institute of Evolutionary Physiology and Biochemistry
- Issue: Vol 53, No 2 (2017)
- Pages: 135-142
- Section: Comparative and Ontogenic Physiology
- URL: https://journals.rcsi.science/0022-0930/article/view/159230
- DOI: https://doi.org/10.1134/S1234567817020069
- ID: 159230
Cite item
Abstract
The effect of serotonin solutions on the locomotor activity of cercariae with different swimming patterns, Cryptocotyle lingua and Himasthla elongate, was investigated during their lifespan using motion track analysis and a frame-by-frame count of behavioral elements. Serotonin caused a noticeable alteration of several locomotion parameters in both species studied, while the activity per se decreased significantly with age. In intermittently swimming C. lingua cercariae, serotonin induced an increase in the frequency of active swimming phases (spurts) without significant changes in the duration and velocity of the spurts themselves. In continuously swimming H. elongata cercariae, serotonin increased the number of stops during the first hour after the emission from the host mollusk under a constant average swimming velocity. Immunocytochemical visualization of serotonin revealed a decline in its level with age (time after emission) and different dynamics of this process in neurons located in the tail and body of C. lingua cercariae. The data are interpreted in the light of the modulatory role of serotonin known for other animals.
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About the authors
O. O. Tolstenkov
A. N. Severtsov Institute of Ecology and Evolution
Author for correspondence.
Email: otolo@mail.ru
Russian Federation, Moscow
V. V. Prokofiev
Pskov State University
Email: otolo@mail.ru
Russian Federation, Pskov
M. V. Pleskacheva
Lomonosov Moscow State University
Email: otolo@mail.ru
Russian Federation, Moscow
M. K. S. Gustafsson
Department of Biosciences
Email: otolo@mail.ru
Finland, Turku
M. I. Zhukovskaya
Sechenov Institute of Evolutionary Physiology and Biochemistry
Email: otolo@mail.ru
Russian Federation, St. Petersburg