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    Risk assessment based on indirect predation cues: revisiting fine-grained variation

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    Author
    McCoy, Michael W.; Wheat, Stefan K.; Warkentin, Karen M.; Vonesh, James R.
    Abstract
    To adaptively express inducible defenses, prey must gauge risk based on indirect cues of predation. However, the information contained in indirect cues that enable prey to fine-tune their phenotypes to variation in risk is still unclear. In aquatic systems, research has focused on cue concentration as the key variable driving threat-sensitive responses to risk. However, while risk is measured as individuals killed per time, cue concentration may vary with either the number or biomass killed. Alternatively, fine-grained variation in cue, that is, frequency of cue pulses irrespective of concentration, may provide a more reliable signal of risk. Here, we present results from laboratory experiments that examine the relationship between red-eyed treefrog tadpole growth and total cue, cue per pulse, and cue pulse frequency. We also reanalyze an earlier study that examined the effect of fine-grained variation in predator cues on wood frog tadpole growth. Both studies show growth declines with increasing cue pulse frequency, even though individual pulses in high-frequency treatments contained very little cue. This result suggests that counter to earlier conclusions, tadpoles are using fine-grained variation in cue arising from the number of predation events to assess and respond to predation risk, as predicted by consumer–resource theory.
    URI
    http://hdl.handle.net/10342/5218
    Subject
     Inducible defense; Phenotypic plasticity; Predation; Tadpole 
    Date
    2015-10
    Citation:
    APA:
    McCoy, Michael W., & Wheat, Stefan K., & Warkentin, Karen M., & Vonesh, James R.. (October 2015). Risk assessment based on indirect predation cues: revisiting fine-grained variation. Ecology and Evolution, (5:20), p.4523-4528. Retrieved from http://hdl.handle.net/10342/5218

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    MLA:
    McCoy, Michael W., and Wheat, Stefan K., and Warkentin, Karen M., and Vonesh, James R.. "Risk assessment based on indirect predation cues: revisiting fine-grained variation". Ecology and Evolution. 5:20. (4523-4528.), October 2015. March 04, 2021. http://hdl.handle.net/10342/5218.
    Chicago:
    McCoy, Michael W. and Wheat, Stefan K. and Warkentin, Karen M. and Vonesh, James R., "Risk assessment based on indirect predation cues: revisiting fine-grained variation," Ecology and Evolution 5, no. 20 (October 2015), http://hdl.handle.net/10342/5218 (accessed March 04, 2021).
    AMA:
    McCoy, Michael W., Wheat, Stefan K., Warkentin, Karen M., Vonesh, James R.. Risk assessment based on indirect predation cues: revisiting fine-grained variation. Ecology and Evolution. October 2015; 5(20) 4523-4528. http://hdl.handle.net/10342/5218. Accessed March 04, 2021.
    Collections
    • 2015-2016 Open Access Publishing Fund
    • Biology
    • Open Access Fund
    • Open Access Publishing Support Fund

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