Effects of experimental malaria infection on self-maintenance behavior in house sparrows


SOCIETY FOR INTEGRATIVE AND COMPARATIVE BIOLOGY
2021 VIRTUAL ANNUAL MEETING (VAM)
January 3 – Febuary 28, 2021

Meeting Abstract


P24-7  Sat Jan 2  Effects of experimental malaria infection on self-maintenance behavior in house sparrows Couvillion, KE*; Kelly, TR; Lattin, CR; Louisiana State University; Louisiana State University; Louisiana State University kcouvi8@lsu.edu

Climate change is expected to intensify the transmission rate of avian malaria, threatening future populations and biodiversity of songbirds worldwide. The relationship between infection status and behavior currently relies heavily upon observational studies, so it is difficult to predict the extent to which increased Plasmodium incidence may affect songbird behaviors required for food acquisition and self-maintenance. In this experiment, we inoculated wild-caught house sparrows (Passer domesticus) with either a naturally occurring malaria species (Plasmodium) or a “sham” control inoculation (donor blood not infected with Plasmodium). Behavior was quantified from 90 min video recordings of sparrows, after a 30 min habituation period, on day -5 (5 days before inoculation) and days 2, 6, 9, and 13 days post-inoculation. Observers were blind to bird treatment (infected n=9, resisted infection n=5, sham n=6). We quantified activity (number of flights and hops), feeding duration, and preening duration of all individuals. We predicted that only the successfully infected birds would show decreased behavior in all three categories. Preliminary data from pre-inoculated and day 2 post-inoculation videos demonstrated that successfully infected house sparrows exhibited no change in general activity levels, increased overall time spent preening, and decreased time spent feeding as the experiment progressed (in contrast to controls). We detected no behavioral changes in exposed-but-uninfected (resistant) birds. These results suggest that successful malaria infection may affect feeding and self-maintenance behavior mere days after malaria exposure.

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