Thermopreferential behavior of the Senegal bichir Polypterus senegalus (Polypteridae) under chronic visual deprivation

Kasumyan, A.O.; Zdanovich, V.V.; Sataeva, V.V.

Авторы: Kasumyan A.O., Zdanovich V.V., Sataeva V.V.
Журнал: Journal of Ichthyology
Том: 65
Номер: 1
Год издания: 2025
Издательство: Pleiades Publishing, Inc.
Местоположение издательства: New York, USA
Первая страница: 137
Последняя страница: 144
DOI: 10.1134/S0032945224700887
Аннотация: Abstract—The effect of chronic visual deprivation (eye lens removal, 3 months) on the thermopreferential behavior and preferred temperature in fish was studied for the first time on the example of the Senegal bichirPolypterus senegalus. In intact Senegal bichir, the thermopreferential range and mean preferred temperature are 32.0–35.0 and 33.8°C, whereas in visually deprived fish they are 26.0–35.0 and 30.2°C, respectively. Compared to intact individuals, the visually deprived fish are more mobile and make 10.3 times more travelsfrom compartment to compartment in the thermogradient tray, their total travel distance is 16.9 times longer, and the distance swum without change of direction is 1.6 times longer and takes 8.7 times less time. The rate of temperature change during movements in visually deprived fish is 14.9 times higher than in intact individuals.Changes in thermal preference and movement activity found in fish experiencing chronic visual deprivation indicate the presence of complex relations between thermoreception and the visual system.
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