Abstract：
:Long-term monitoring of host-parasite interactions is important for understanding the consequences of infection on host fitness and population dynamics. In an eight-year survey of the loggerhead sea turtle (Caretta caretta) population nesting in Cabo Verde, we determined the spatiotemporal variation of Ozobranchus margoi, a sanguivorous leech best known as a vector for sea turtle fibropapilloma virus. We quantified O. margoi association with turtles' δ15N and δ13C stable isotopes to identify where infection occurs. We then measured the influence of infection on reproduction and offspring fitness. We found that parasite prevalence has increased from 10% of the population in 2010, to 33% in 2017. Stable isotope analysis of host skin samples suggests transmission occurs within the host's feeding grounds. Interestingly, we found a significant interaction between individual size and infection on the reproductive success of turtles. Specifically, small, infected females produced fewer offspring of poorer condition, while in contrast, large, infected turtles produced greater clutch sizes and larger offspring. We interpret this interaction as evidence, upon infection, for a size-dependent shift in reproductive strategy from bet hedging to terminal investment, altering population dynamics. This link between infection and reproduction underscores the importance of using long-term monitoring to quantify the impact of disease dynamics over time.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Lockley EC,Fouda L,Correia SM,Taxonera A,Nash LN,Fairweather K,Reischig T,Durão J,Dinis H,Roque SM,Lomba JP,Dos Passos L,Cameron SJK,Stiebens VA,Eizaguirre Cdoi
10.1038/s41598-020-75498-4subject
Has Abstractpub_date
2020-10-29 00:00:00pages
18569issue
1issn
2045-2322pii
10.1038/s41598-020-75498-4journal_volume
10pub_type
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