Presentation Details
| The effects of thermal stress on reproductive success and fitness Dariana M Gomez , Kasey Fowler-Finn. Saint Louis University, Saint Louis, MO, USA |
Abstract
The thermal environment experienced across the life cycle affects nearly every aspect of reproduction in insects, with important fitness consequences. The impact on mating behavior and reproductive output, however, is highly sensitive to the timing of exposure to different thermal conditions. Here, we exposed insects to thermal stress at different life stages and measured the resulting mating rates and survival in Enchenopa binotata treehoppers. We collected early instar juveniles from the field, maintained them at 23ºC on potted host plants in the laboratory, and exposed them as late-stage juveniles or early-stage adults to three days of cold stress (18ºC), hot stress (28ºC) or no stress. We then ran mating trials across temperatures found naturally in the field (18ºC to 42ºC). The no stress group was more likely to mate compared to the cold stress group as juveniles. We also found variation in survival across groups. Next, we will look at fertility and fecundity to model how thermal stress affects population dynamics. Overall, the carryover effects we observed could have important implications for population resilience to changing global thermal conditions.
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.
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