For this gyrodactylid-fish system, a longer period of host infection led to a higher chance of host recovery. The average time of host infection before recovery or death was between 6 and 14 days. turnbulli strain changed microhabitat preference over time, indicating microhabitat preference of gyrodactylids is host and time dependent. bullatarudis strains preferred the caudal and rostral regions respectively across different fish stocks however, the wild G. Finally, we quantified parasite virulence of three different strains as a function of host mortality and recovery across different fish stocks and sexes. By adapting a multi-state Markov model that extends the standard survival models, we improved previous estimates of survival probabilities. MethodsĪ rank-based multivariate Kruskal-Wallis test coupled with its post-hoc tests and graphical summaries were used to investigate the spatial and temporal parasite distribution of different gyrodactylid strains across different host populations. Here, we use more advanced statistics and a sophisticated mathematical model to investigate these questions based on empirical data to add to our understanding of this gyrodactylid-fish system. bullatarudis, on their fish host, Poecilia reticulata, but questions remain about parasite microhabitat preferences, host survival and parasite virulence over time.
Previous experimental studies have explored the infrapopulation dynamics of co-infecting ectoparasites, Gyrodactylus turnbulli and G. The current study focuses on the infection dynamics of a gyrodactylid-fish system. Mathematical modelling of host-parasite systems has seen tremendous developments and broad applications in theoretical and applied ecology.
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