| Autor: |
Dobrović, Ana, Bielen, Ana, Vukelić, Mara, Pavić, Dora, Hudina, Sandra |
| Přispěvatelé: |
Jelaska, Sven D. |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
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| Popis: |
Both strong immune system and fast growth rate are important determinants of invasion success of a species and their dispersal rate in a novel environment. Since effective immune function may be costly, increased investment in immune response would limit the individual's resources available for growth, leading to a trade-off between these traits in an invader. The aim of this study was to examine the energetic costs of mounting an immune response caused by infection by crayfish plague pathogen (Aphanomyces astaci strain Psl) on growth and mortality of individually kept juvenile marbled crayfish under laboratory conditions. Firstly, we conducted an infection trial using four different spore concentrations of A. astaci (7500, 15000, 20000, 30000 spores/ml) to determine the mortality of infected individuals during four weeks following the infection. We recorded mortality of 78% in individuals infected with concentration of 30000 spores/ml and no mortality at lower concentrations. Based on these results, we selected two concentrations (7500 and 15000 spores/ml) to test if repeated exposure to A. astaci leads to change in growth compared to non-infected individuals (control group). At least two repeated infections were conducted in four-week intervals using selected concentrations. Within these intervals we continuously recorded mortality of individuals and measured length and weight of control group and infected groups before succeeding infections. Significantly lower length and weight increments of repeatedly infected individuals compared to control group were observed. We discuss our findings in the context of potential long-term effects of trade-offs between chronic and acute activation of the immune system and growth on the invasive success of non-indigenous crayfish species in novel environment. This research was funded by Croatian Science Foundation Installation Grant (HRZZ UIP-2017-05- 1720). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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