The ontogenetic shift in thermoregulatory behaviour of newt larvae: testing the "enemy-free temperatures" hypothesis

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The ontogenetic shift in thermoregulatory behaviour of newt larvae: testing the "enemy-free temperatures" hypothesis

Popis výsledku v původním jazyce

We examined whether the shift in preferred body temperatures (Tps) of newt larvae (Triturus alpestris) increases the Tps deviation of the most vulnerable stages from the Tps range of their main predator, dragonfly larvae (Aeshna cyanea) ? the "predator-free temperatures" hypothesis. Analyses of thermoregulatory behaviour in the laboratory thermal gradient revealed that freshly hatched newt larvae maintained lower body temperatures than larvae in later stages, whose Tps largely fell into the Tps range ofdragonfly larvae. With respect to the thermal quality of natural habitat, the anti-predator effectiveness of the Tps shift decreased during development. Water temperatures in natural habitats were located largely below the preferred body temperature range of both newt and dragonfly larvae, which limits their potential thermal niche partitioning. We conclude that other factors than predator avoidance drive the ontogenetic Tps shift in our model system.

Název v anglickém jazyce

The ontogenetic shift in thermoregulatory behaviour of newt larvae: testing the "enemy-free temperatures" hypothesis

Popis výsledku anglicky

We examined whether the shift in preferred body temperatures (Tps) of newt larvae (Triturus alpestris) increases the Tps deviation of the most vulnerable stages from the Tps range of their main predator, dragonfly larvae (Aeshna cyanea) ? the "predator-free temperatures" hypothesis. Analyses of thermoregulatory behaviour in the laboratory thermal gradient revealed that freshly hatched newt larvae maintained lower body temperatures than larvae in later stages, whose Tps largely fell into the Tps range ofdragonfly larvae. With respect to the thermal quality of natural habitat, the anti-predator effectiveness of the Tps shift decreased during development. Water temperatures in natural habitats were located largely below the preferred body temperature range of both newt and dragonfly larvae, which limits their potential thermal niche partitioning. We conclude that other factors than predator avoidance drive the ontogenetic Tps shift in our model system.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EG - Zoologie

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2009

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Zoology

ISSN

0952-8369

e-ISSN

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Svazek periodika

279

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

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Kód UT WoS článku

000269743600009

EID výsledku v databázi Scopus

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