Sibling aggression and brood reduction: a review

Morandini, Virginia; Ferrer, Miguel

doi:10.1080/03949370.2014.880161

Cited by 49 publications

(48 citation statements)

References 86 publications

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“…It is not possible in either study to eliminate the possibility that sex ratios changed through time for some very different reason, unrelated to either population density or age-composition of breeders. In addition, we only evaluated secondary, not primary sex ratio variation; therefore, we cannot determine mechanisms to achieve it (Bowers et al 2013;Morandini and Ferrer 2015). Only further studies will help to separate these confounding factors, including the possibility of facultative brood reduction affecting secondary sex ratio.…”

Section: Discussionmentioning

confidence: 99%

Skewed sex ratios in a newly established osprey population

et al. 2019

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Section: Discussionmentioning

confidence: 99%

Skewed sex ratios in a newly established osprey population

et al. 2019

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“…Sibling aggression over limited resources in nonhuman species is well documented (Salmon & Hehman, 2014). Studies on bird species show that in extreme cases, sibling rivalry may even result in siblicide through enforced starvation, physical aggression or eviction from the nest (Morandini & Ferrer, 2015). In humans, resource control theory (RCT; Hawley, 1999) suggests that asymmetries within a social group lead to social dominance and resource-directed agonistic behaviour is used for resource acquisition (Hawley, 1999).…”

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confidence: 99%

Trouble in the nest: Antecedents of sibling bullying victimization and perpetration.

Dantchev

Wolke

2019

Developmental Psychology

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“…Competition from nestmates over food is arguably one of the most important factors that influence young because competition for food often influences energy acquisition that is necessary for growth and development. Competition among nestmates is typical for species that raise offspring in broods, and the degree of competition can be a function of resource availability (Morandini & Ferrer, 2015), parent quality (Saino, Calza, & Moller, 1997;Smiseth, Ward, & Moore, 2007), and the number and characteristics of competing young (Godfray, 1995). In vertebrates, brood size can have strong consequences on some aspects of the offspring phenotype, such as body size and growth (Nilsson & Gardmark, 2001;Vitousek, Jenkins, Hubbard, Kaiser, & Safran, 2017).…”

Section: Introductionmentioning

confidence: 99%

Experimental brood enlargement differentially influences the magnitude of the corticosterone stress response in closely related, co‐occurring songbirds

et al. 2018

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Rearing environments can shape offspring phenotype across taxa, yet little is known about how brood size influences hypothalamic–pituitary axis functioning, whether its expression trades off with growth, and the degree to which these relationships vary between species. We evaluated how brood size influenced nestling physiological (glucocorticoids) and somatic traits (growth), and the extent to which their relationship differed between two closely related, sympatric songbirds when experiencing identical rearing environments. Specifically, we used a cross‐fostering approach to alter brood size and create an experimental gradient of nestmate competition, and then tested whether experimentally manipulated brood sizes resulted in nestlings with altered concentrations of corticosterone and whether corticosterone responses traded off with growth. Nestlings of both species experienced elevated concentrations of baseline and stressor‐induced corticosterone when raised in enlarged broods, relative to control and reduced broods, but neither measurement was found to trade off with growth or be linked to survival to fledging. In contrast, we found divergence in the magnitude of the corticosterone stress response between species across all brood treatments, with greater stressor‐induced corticosterone concentrations found in the Violet‐green Swallow (Tachycineta thalassina) relative to the closely related Tree Swallow (T. bicolor). Our study demonstrated that brood size can lead to changes in offspring corticosterone concentrations in swallows and that nestlings of sympatric species, even those that are closely related and ecologically similar, can diverge in their corticosterone stress response when experiencing identical rearing conditions. We conclude that corticosterone appears to play a key role for balancing energetic demands that arise in the face of nestmate competition in Tachycineta swallows and that elevated concentrations of corticosterone may enhance offspring survival during challenging environmental conditions, such as when brood competition is strong. A http://onlinelibrary.wiley.com/doi/10.1111/1365-2435.13116/suppinfo is available for this article.

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Sibling aggression and brood reduction: a review

Cited by 49 publications

References 86 publications

Skewed sex ratios in a newly established osprey population

Skewed sex ratios in a newly established osprey population

Trouble in the nest: Antecedents of sibling bullying victimization and perpetration.

Experimental brood enlargement differentially influences the magnitude of the corticosterone stress response in closely related, co‐occurring songbirds

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