Risk assessment based on indirect predation cues: revisiting fine-grained variation
| dc.contributor.author | McCoy, Michael W. | |
| dc.contributor.author | Wheat, Stefan K. | |
| dc.contributor.author | Warkentin, Karen M. | |
| dc.contributor.author | Vonesh, James R. | |
| dc.date.accessioned | 2016-04-01T15:03:46Z | |
| dc.date.available | 2016-04-01T15:03:46Z | |
| dc.date.issued | 2015-10 | |
| dc.description.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. | en_US |
| dc.description.sponsorship | ECU Open Access Publishing Support Fund; National Science Foundation Grant Numbers: 0716923, 0717220 | en_US |
| dc.identifier.doi | 10.1002/ece3.1552 | |
| dc.identifier.uri | http://hdl.handle.net/10342/5218 | |
| dc.language.iso | en_US | en_US |
| dc.relation.uri | http://onlinelibrary.wiley.com/doi/10.1002/ece3.1552/full | en_US |
| dc.subject | Inducible defense | en_US |
| dc.subject | Phenotypic plasticity | en_US |
| dc.subject | Predation | en_US |
| dc.subject | Tadpole | en_US |
| dc.title | Risk assessment based on indirect predation cues: revisiting fine-grained variation | en_US |
| dc.type | Article | en_US |
| ecu.journal.issue | 20 | en_US |
| ecu.journal.name | Ecology and Evolution | en_US |
| ecu.journal.pages | 4523-4528 | en_US |
| ecu.journal.volume | 5 | en_US |
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