2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/05/2017 | 10:15 AM - 10:30 AM | PLASTICITY IN TIMING OF HYDROLOGIC SPAWNING CUES FOR THE FOOTHILL YELLOW-LEGGED FROG (RANA BOYLII) UNDER MEDITERRANEAN CLIMATE EXTREMES IN SIERRA NEVADA RIVERS | 302B
PLASTICITY IN TIMING OF HYDROLOGIC SPAWNING CUES FOR THE FOOTHILL YELLOW-LEGGED FROG (RANA BOYLII) UNDER MEDITERRANEAN CLIMATE EXTREMES IN SIERRA NEVADA RIVERS
Rana boylii (Foothill Yellow-legged Frog) requires specific hydrologic cues to start spawning (oviposition). These hydrologic cues are similar across a wide geographic range, despite inter-annual variability in runoff timing inherent to a Mediterranean climate. For R. boylii, plasticity in spawning timing may be viewed as a predictable response to consistent hydrologic cues, such as flow timing, rate of receding spring snowmelt-runoff, and increasing water temperature. We show data demonstrating differences in inter-annual spawning timing in R. boylii between wet and dry years, including some of the earliest and latest oviposition documented in the Sierra Nevada. R. boylii shows high plasticity in timing of oviposition (in days) inter-annually, yet oviposition remains strongly correlated with the rate of the natural spring snowmelt recession in the Sierra Nevada and the minimum average weekly water temperature. A summary of over 10 years of spawning data for R. boylii across California shows the range in timing can vary by four months, from early March to early July. Better understanding of the hydrologic cues used by a lotic indicator species may help improve flow management efforts to mimic naturally functioning flow regimes.
- C02 Fish and Other Aquatic Vertebrates
- C12 Conservation Ecology
- C14 Hydroecology
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Presenters/Authors
Ryan Peek
(), University of California, Davis, rapeek@ucdavis.edu;
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Sarah Yarnell
(), University of California, Davis, smyarnell@ucdavis.edu;
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