A Mechanism of Extreme Growth and Reliable Signaling in Sexually Selected Ornaments and Weapons

Emlen, Douglas J.; Warren, Ian A.; Johns, Annika; Dworkin, Ian; Lavine, Laura Corley

doi:10.1126/science.1224286

Cited by 454Animal Behavior and ReproductionEvolutionary Psychology and Human BehaviorMorphological variations and asymmetry

A Mechanism of Extreme Growth and Reliable Signaling in Sexually Selected Ornaments and Weapons

Emlen, Douglas J., Warren, Ian A., Johns, Annika, Dworkin, Ian, Lavine, Laura Corley·2012·Science

DOI 10.1126/science.1224286

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Abstract

Truthful Embellishments: Exaggerated ornaments such as beetle horns, deer antlers, and extreme tail lengths in birds are typically assumed to be subject to sexual selection because they signal the quality of an individual's breeding status—but how? Emlen et al. (p. 860 , published online 26 July) present a general mechanistic model for the evolution of exaggerated traits, proposing that sensitivity to the insulin response pathway can explain variation among individuals. The exaggerated size of such ornaments and their increased variability between individuals are a result of sexual selection for traits that are honest signals of the fitness of the individual.

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Our results focus entirely on the costs associated with locomotion; numerous other costs related to sexual selection may be incurred, and for peacocks these may lie in the development of the trait and in its display rather than the inherent cost of moving around with the trait.
“It is important to stress that our results focus entirely on the costs associated with locomotion, there are of course numerous other costs related to sexual selection that may be incurred, indeed for peacocks these may lie in the development of the trait and in its display4344 rather than the inherent cost of moving around with the trait.”
From The peacock train does not handicap cursorial locomotor performance (2016) · cites this paper as [43]

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Authors: Emlen, D. J., Warren, I. A., Johns, A., Dworkin, I., & Lavine, L. C.
Affiliations: University of Montana (US)
Washington State University (US)
Michigan State University (US)
Corresponding author: Emlen, Douglas J.
ORCID: Emlen, Douglas J.
Warren, Ian A.
Dworkin, Ian
Lavine, Laura Corley
Venue: Science
Publisher: American Association for the Advancement of Science (AAAS)
Published: 2012-08-17
Volume: 337
Issue: 6096
Pages: 860-864
ISSN: 0036-8075 (ISSN-L)
1095-9203
DOI: 10.1126/science.1224286
OpenAlex: W1966661268
Cited by: 454
References: 84
Citations by year: 2026: 15 · 2025: 22 · 2024: 15 · 2023: 28 · 2022: 40 · 2021: 37 · 2020: 30 · 2019: 39 · 2018: 31 · 2017: 28 · 2016: 49 · 2015: 37 · 2014: 44 · 2013: 30 · 2012: 8
FWCI: 39.01
Type: journal article
Language: en
Open access: closed
Locations: Science (publishedVersion)
PubMed (publishedVersion)
Topics: Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Behavior and Reproduction
Social Sciences › Psychology › Experimental and Cognitive Psychology › Evolutionary Psychology and Human Behavior
Physical Sciences › Mathematics › Geometry and Topology › Morphological variations and asymmetry
Keywords: sexual selection, weapons, insulin/IGF-1 signaling, condition-dependent signaling, male quality, growth mechanism, interindividual variability
MeSH terms: Animals, Coleoptera, Horns, Insulin, Male, Molecular Sequence Data, Receptor, Insulin, Somatomedins, Signal Transduction, Mating Preference, Animal, Gene Knockdown Techniques

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A Mechanism of Extreme Growth and Reliable Signaling in Sexually Selected Ornaments and Weapons

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