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Predators, for instance, can amplify or dilute parasite effects on their hosts. Likewise, exposure to parasites or predators at one life stage can have long\u2010term consequences on individual performance and survival, which can influence population and disease dynamics. To understand how predators affect amphibian parasite infections across life stages, we manipulated exposure of northern leopard frog (<jats:italic>Rana pipiens<\/jats:italic>) tadpoles to three predators (crayfish [<jats:italic>Orconectes rusticus<\/jats:italic>], bluegill [<jats:italic>Lepomis macrochirus<\/jats:italic>], or mosquitofish [<jats:italic>Gambusia affinis<\/jats:italic>]) and to trematode parasites (<jats:italic>Echinostoma<\/jats:italic>spp.) in mesocosms and followed juveniles in outdoor terrestrial enclosures through overwintering. Parasites and predators both had strong impacts on metamorphosis with bluegill and parasites individually reducing metamorph survival. However, when fish were present, the negative effects of parasites on survival was not apparent, likely because fish altered community composition via increased algal food resources. Bluegill also reduced snail abundance, which could explain reduced abundance of parasites in surviving metamorphs. Bluegill and parasite exposure increased mass at metamorphosis, which increased metamorph jumping, swimming, and feeding performance, suggesting that larger frogs would experience better terrestrial survival. Effects on size at metamorphosis persisted in the terrestrial environment but did not influence overwintering survival. Based on our results, we constructed stage\u2010structured population models to evaluate the lethal and sublethal effects of bluegill and parasites on population dynamics. Our models suggested that positive effects of bluegill and parasites on body size may have greater effects on population growth than the direct effects of mortality. This study illustrates how predators can alter the outcome of parasitic infections and highlights the need for long\u2010term experiments that investigate how changes in host\u2013parasite systems alter population dynamics. We show that some predators reduce parasite effects and have indirect positive effects on surviving individuals potentially increasing host population persistence.<\/jats:p>","DOI":"10.1002\/ece3.9512","type":"journal-article","created":{"date-parts":[[2022,11,16]],"date-time":"2022-11-16T05:53:54Z","timestamp":1668578034000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Can predators stabilize host\u2013parasite interactions? 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