Affiliation:
1. Zoological Institute of the Russian Academy of Sciences, Universitetskaya Emb. 1, 199034 St. Petersburg, Russia
2. Pavlov First Saint Petersburg State Medical University, Russian Ministry of Health, Lev Tolstoy Str. 6–8, 197022 St. Petersburg, Russia
Abstract
To determine the difference in stress response between two chromosomal forms of a common vole, the “arvalis” and “obscurus”, the behavior of adult (6–12 months) lab-born vole males were evaluated in a forced swim test. During the test, they were carefully placed into glass cylinders (d=12 cm, h=20 cm) filled with water (h=15 cm, 24±1°C) and remained there for up to 6 min. Their behavioral patterns were video recorded and continuously monitored (Ethograph, ver. 2.7, RITEC, Russia) to document the duration of swimming and paddling (orientation), floating (immobility) and climbing (escape). Two series of experiments were performed, in May 2016 and June 2017, with independent groups: “arvalis” (N=9 each year) and “obscurus” (N=9 and 22 each year, respectively). The «arvalis» and «obscurus» significantly differed in their responses to the stress test. Over 35% of obscurus males (2 of 9 in 2016 and 9 of 22 in 2017) failed to complete the test, within 3 min these animals had to be rescued to prevent drowning (significant differences from “arvalis” according to Fisher's exact test). “Arvalis” voles displayed higher duration of escape attempts (F(1.14)=3.5; P=0.08 – for first; F(1.20)=15.6; P<0.001 – for second series of experiment), shorter duration of swimming and paddling (significantly in the first series – F(1.14)=14.3; P<0.005), and shorter duration of immobility (significantly in the second series – (F(1.20)=6.1; P<0.001). The results suggest that two chromosomal forms of common vole have major differences in stress response behavior. In the forced swim test, the “arvalis” voles are displaying higher endurance, associated with active escape behavior, when compared to “obscurus” animals. Further studies need to address their responses to other stress paradigms and to water environment, in general. The latter may play a major role in vole migration when they meet water barriers in their natural environment.
Publisher
Zoological Institute of the Russian Academy of Sciences
Subject
Insect Science,Animal Science and Zoology,Aquatic Science,Ecology, Evolution, Behavior and Systematics
Reference55 articles.
1. Aubrecht T.G., Weil Z.M. and Nelson R.J. 2014. Melatonin treatment during early life interacts with restraint to alter neuronal morphology and provoke depressive-like responses. Behavioural Brain Research, 263: 90–97. https://doi.org/10.1016/j.bbr.2014.01.025
2. Baskevich M.I., Potapov S.G., Okulova N.M., Sapelnikov S.F., Vlasov A.A., Oparin M.L., Mironova T.A. and Avilova E.A. 2009. To distribution and variability of sibling species of Microtus arvalis (Rodentia, Arvicolinae) in Central Black Earth Region based on chromosome and molecular-genetic data. Zoologicheskiy zhurnal, 88(4): 473–487. [In Russian].
3. Baskevich M.I., Mironova T.A., Cherepanova E.V. and Krivonogov D.M. 2016. New data on chromosomal variability, distribution of sibling species, and hybridization of 46-chromosomal forms of Microtus arvalis sensu lato (Rodentia, Arvicolinae) in the Upper Volga basin. Biology Bulletin, 43(9): 1281–1291. https://doi.org/10.1134/s1062359016110042
4. Baskevich M.I., Khlyap L.A., Mironova T.A., Bogdanov A.S., Malygin V.M., Gadzhiyev A.H., Litvinova E.M. and Sapelnikov S. F. 2018. Role of genetic approaches in studying of areal borders of cryptic species and forms of grey volens in Eastern Europe. Materials of the International Conference: Topical issues of biogeography (9–12 October 2018, Saint Petersburg). Publishing House of Saint Petersburg State University, Saint Petersburg: 36–38. [In Russian].
5. Bohdal T., Navrátil J. and Sedláček F. 2016. Small terrestrial mammals living along streams acting as natural landscape barriers. Ekológia (Bratislava), 35(2): 191–204. https://doi.org/10.1515/eko-2016-0015
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