Hydraulic Habitat Structure Impacts Risk of Trematode Infection
Mikheev, V. N., Pasternak, A. F., & Taskinen, J. (2022). Hydraulic Habitat Structure Impacts Risk of Trematode Infection. Journal of Ichthyology, 62(6), 1190-1195. https://doi.org/10.1134/S0032945222060170
Published inJournal of Ichthyology
© 2022 the Authors
Variability in infection rates of trematodes Diplostomum pseudospathaceum in 0+ rainbow trout Oncorhynchus mykiss under different hydraulic regimes was studied in the experimental setup with regulated flow rates and environmental heterogeneity. The average infection rate in the conditions of the current was 1.5 times less than that in the stagnant water. An increase of the flow rate from 3.2 to 11.3 cm/s did not result in lower infection rates, while the interindividual variability in the infection rate (coefficient of variation) tended to increase along with changing the still-water conditions (20%) to the high flow rate environments (40%) within the experiment. A decrease in the average infection rate and an increase in the variability within the heterogenous flow of water could indicate the fact that some fish effectively avoid infection. It may be caused by redistribution of cercariae suspended in the water column across microhabitats with different flow rates together with fish behavior which allows them to choose sites with low parasite concentration. ...
ISSN Search the Publication Forum0032-9452
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Additional information about fundingThe study was carried out with a financial support of the Russian Foundation for Basic Research (project 20-04-00239, data processing and analysis) and the Russian Science Foundation (project 19-14-00015-P, article writing) and within the State Task FMWE-2021-0007.
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