2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/24/2018 | 3:00 PM - 3:15 PM | WHY ADULT MAYFLIES GET SMALLER AS TEMPERATURE WARMS | 420 B
WHY ADULT MAYFLIES GET SMALLER AS TEMPERATURE WARMS
We reared three species of mayflies from egg hatch to adult at 10 constant temperatures ranging from ~12–34C. For each species, male and female adult size and development time declined significantly with warming as per the Temperature Size Rule (TSR). Analysis of these and other life history traits across this experimental temperature gradient support several hypotheses (H’s) regarding TSR in mayflies. H1 – that the TSR response is due to the rate of larval development increasing faster per degree C than the rate of larval growth. H2 and H3 - that the accelerated development is caused by either development starting at a smaller larval size warm (H2) and/or warming temperature stimulating the expression of genes associated with juvenile hormone degradation and ecdysone production (H3). H4 - that female adults get proportionately smaller than males with a rise in temperature because females cannot ingest/process sufficient energy to simultaneously produce both body and reproductive tissue. H5 - that fecundity decreases more than female mass in response to warming because reduced egg production allows more energy to be directed to the structural growth needed for successful metamorphosis, flight, mating, and oviposition.
- Life History
- Population
- Evo-eco Dynamics
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Presenters/Authors
Bernard Sweeney
(), Stroud Water Research Center, sweeney@stroudcenter.org;
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David Funk
(), Stroud Water Research Centrer, dfunk@stoudcenter.org;
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David Buchwalter
(), North Carolina State University, david_buchwalter@ncsu.edu;
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John Jackson
(), Stroud Water Research Center, jkjackson@stroudcenter.org;
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