A1 Journal article (refereed)
Hydraulic Habitat Structure Impacts Risk of Trematode Infection (2022)

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

JYU authors or editors

Publication details

All authors or editors: Mikheev, V. N.; Pasternak, A. F.; Taskinen, J.

Journal or series: Journal of Ichthyology

ISSN: 0032-9452

eISSN: 1555-6425

Publication year: 2022

Publication date: 28/12/2022

Volume: 62

Issue number: 6

Pages range: 1190-1195

Publisher: Nauka/Interperiodika

Publication country: Russian Federation

Publication language: English

DOI: https://doi.org/10.1134/S0032945222060170

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/85337

Additional information: Also published in Russian: Voprosy Ikhtiologii, 2022, Vol. 62, No. 6, pp. 783–788.

Abstract

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.

Keywords: fish diseases; infections; parasites; trematoda; environmental factors; habitat; flowing waters; flow rate; rainbow trout

Free keywords: yearlings of Oncorhynchus mykiss; trematode Diplostomum pseudospathaceum; cercariae; stream flow rate; habitat heterogeneity

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2022

JUFO rating: 1