Thermal dependence and individual variation in tonic immobility varies between sympatric amphibians
Copyright © 2021 Elsevier Ltd. All rights reserved..
Tonic immobility (TI) is an important antipredator response employed by prey in the last stages of a predation sequence. Evolution by natural selection assumes consistent individual variation (repeatability) in this trait. In ectotherms, which experience variable body temperatures, TI should be repeatable over a thermal gradient to be targeted by natural selection; however, information on thermal repeatability of this trait is missing. We examined thermal repeatability of TI in juveniles of two sympatric amphibians, smooth (Lissotriton vulgaris) and alpine (Ichthyosaura alpestris) newts. Both species showed disparate TI responses to body temperature variation (13-28 °C). While the proportion of TI response was repeatable in both taxa, it increased with body temperature in alpine newts but was temperature independent in smooth newts. Duration of TI decreased with body temperature in both taxa but was only repeatable in smooth newts. Our results suggest that a warming climate may affect population dynamics of sympatric ectotherms through asymmetry in thermal reaction norms for antipredator responses.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:97 |
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| Enthalten in: |
Journal of thermal biology - 97(2021) vom: 08. Apr., Seite 102896 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Baškiera, Senka [VerfasserIn] |
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| Links: |
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| Themen: |
Amphibian |
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| Anmerkungen: |
Date Completed 12.11.2021 Date Revised 12.11.2021 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.jtherbio.2021.102896 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM32418140X |
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| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2021 Elsevier Ltd. All rights reserved. | ||
| 520 | |a Tonic immobility (TI) is an important antipredator response employed by prey in the last stages of a predation sequence. Evolution by natural selection assumes consistent individual variation (repeatability) in this trait. In ectotherms, which experience variable body temperatures, TI should be repeatable over a thermal gradient to be targeted by natural selection; however, information on thermal repeatability of this trait is missing. We examined thermal repeatability of TI in juveniles of two sympatric amphibians, smooth (Lissotriton vulgaris) and alpine (Ichthyosaura alpestris) newts. Both species showed disparate TI responses to body temperature variation (13-28 °C). While the proportion of TI response was repeatable in both taxa, it increased with body temperature in alpine newts but was temperature independent in smooth newts. Duration of TI decreased with body temperature in both taxa but was only repeatable in smooth newts. Our results suggest that a warming climate may affect population dynamics of sympatric ectotherms through asymmetry in thermal reaction norms for antipredator responses | ||
| 650 | 4 | |a Journal Article | |
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| 650 | 4 | |a Antipredator response | |
| 650 | 4 | |a Death-feigning | |
| 650 | 4 | |a Individual variation | |
| 650 | 4 | |a Thanatosis | |
| 650 | 4 | |a Thermal reaction norm | |
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