Presentation Details
| Transgenerational Stressor Regimes Drive Fear Generalization & Individual Differences Elizabeth Salmon1, Kerri Young1, Julianna Jordan1, Melusine Chevalier2, Andrew Sih1, Richard Szeligowski1. 1University of Califonrnia, Davis, Davis, California, USA.2University of Namur, Namur Belgium |
Abstract
Environmental change in the Anthropocene challenges animals with altered and novel risk regimes. However, few studies have tested for consistent individual differences across stressors, and whether these responses are correlated (Fear Generalization). In parallel, exposure to environmental stressors not only affects individuals in the present, but also their offspring through transgenerational plasticity (TGP). While TGP has been studied in the context of a single threat, effects of parental and developmental treatments on responses to multiple stressors remains sparse. Theory predicts that TGP could either increase responsiveness to disparate threats via bet hedging, or optimize response to a single threat. We tested these predictions using the freshwater snail Physa acuta by rearing F1 snails in either control water, elevated salinity or predator cues, and then reared offspring from each parental treatment in a full factorial design. We found that interactions between F1 and F2 developmental conditions led to differential responses to both stressors, altered repeatability, and induced fear generalization.
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