Food restriction decreases thermoregulation in the silky starling<i>Sturnus sericeus</i>(Aves: Passeriformes)

Mao, Liyao; Xu, Jieheng; Shi, Lei; Zheng, Wenshu; Liu, J.-S.

doi:10.1080/24750263.2019.1665114

Cited by 7 publications

(2 citation statements)

References 59 publications

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“…Food restriction experiments on birds, conducted over longer periods and within the thermoneutral zone, have also found a decrease in BMR, in line with our results ( Mao et al, 2019 ; Zhang et al, 2018 ). However, these studies reported a paralleled decrease in BMR and body mass, suggesting the two traits are intrinsically related and thus vary in concert, rather than exhibiting independent strategic modulation.…”

Section: Discussionsupporting

confidence: 91%

Individual response in body mass and basal metabolism to the risks of predation and starvation in passerines

Broggi

Nilsson

2023

Journal of Experimental Biology

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Wintering energy management in small passerines has focused on the adaptive regulation of daily acquisition of energy reserves within a starvation-predation trade-off framework. However, the possibility that the energetic cost of living i.e. basal metabolic rate (BMR) is being modulated as part of the management energy strategy has been largely neglected. Here we addressed this possibility by experimentally exposing captive great tits (Parus major) during winter, to two consecutive treatments of increased starvation and predation risk for each individual bird. Body mass and BMR were measured prior to and after each week-long treatment. We predicted that birds should be lighter but with a higher metabolic capacity (higher BMR) as a response to increased predation risk, and that birds should increase internal reserves while reducing their cost of living (lower BMR) when exposed to increased starvation risk. Wintering great tits kept a constant body mass independently of a week-long predation or starvation treatment. However, great tits reduced the cost of living (lower BMR) when exposed to the starvation treatment, while BMR remained unaffected by the predation treatment. Energy management in wintering small birds partly relies on BMR regulation, which challenges the current theoretical framework based on body mass regulation.

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Section: Discussionsupporting

confidence: 91%

Individual response in body mass and basal metabolism to the risks of predation and starvation in passerines

Broggi

Nilsson

2023

Journal of Experimental Biology

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“…Recent studies have found that early-life environmental stressors might impair mitochondrial function (Gyllenhammer et al, 2020;Zitkovsky et al, 2021). For example food restriction was shown to decrease basal metabolic rate in adult chinese bulbul (Pycnonotus sinensis) and silky starlings (Sturnus sericeus), and to decrease levels of mitochondrial state 4 respiration in the liver for both species (Mao et al, 2019;Zhang et al, 2018). Yet, the impact of early-life conditions on mitochondrial function and the long-lasting effects remain poorly understood.…”

Section: Introductionmentioning

confidence: 99%

Early-life environmental effects on mitochondrial aerobic metabolism: an experimental brood size manipulation in wild great tits

Cossin-Sevrin

Stier

Hukkanen

et al. 2023

Preprint

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Parental care (including postnatal provisioning) is a major component of the offspring early-life environment. In avian species, the number of chicks in the nest and subsequent sibling competition for food are known to affect chick growth, leading in some cases to long-lasting effects for the offspring. Because of its central role in converting energy, variation in the offspring mitochondrial metabolism could be an important pathway underlying variation in growth patterns. Here, we performed a brood size manipulation in great tits (Parus major) to unravel its impact on offspring mitochondrial metabolism and reactive oxygen species (ROS) production in red blood cells. We investigated the effects of brood size on chicks growth and survival, and tested for long-lasting effects on juvenile mitochondrial metabolism and phenotype. As expected, chicks raised in reduced broods had a higher body mass compared to enlarged and control groups. However, mitochondrial metabolism and ROS production were not significantly affected by the treatment either at chick or juvenile stages. Chicks in very small broods were smaller in size and had higher mitochondrial metabolic rates. The nest of rearing has a significant effect on nestling mitochondrial metabolism, yet variation in mitochondrial metabolism at the early-life stages are not associated with survival chances. The contribution of the rearing environment in determining offspring mitochondrial metabolism emphasizes the plasticity of mitochondrial metabolism in changing environments. Further studies would be needed to closely investigate what are the major environmental cues affecting the offspring mitochondrial metabolism during the growth period.

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Seasonal acclimatization and temperature acclimation in small passerine birds is achieved via metabolic adjustments

XuanYuan

Chen

et al. 2023

Avian Research

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Food restriction decreases thermoregulation in the silky starlingSturnus sericeus(Aves: Passeriformes)

Cited by 7 publications

References 59 publications

Individual response in body mass and basal metabolism to the risks of predation and starvation in passerines

Individual response in body mass and basal metabolism to the risks of predation and starvation in passerines

Early-life environmental effects on mitochondrial aerobic metabolism: an experimental brood size manipulation in wild great tits

Seasonal acclimatization and temperature acclimation in small passerine birds is achieved via metabolic adjustments

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