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Exaggerated sexual swellings in female non-human primates are reliable signals of female fertility and body condition

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Exaggerated sexual swellings in female non-human primates are reliable signals of female fertility and body condition. / Street, Sally; Cross, Catharine Penelope; Brown, Gillian Ruth.

In: Animal Behaviour, Vol. 112, 02.2016, p. 203–212.

Research output: Contribution to journalArticle

Harvard

Street, S, Cross, CP & Brown, GR 2016, 'Exaggerated sexual swellings in female non-human primates are reliable signals of female fertility and body condition' Animal Behaviour, vol. 112, pp. 203–212. https://doi.org/10.1016/j.anbehav.2015.11.023

APA

Street, S., Cross, C. P., & Brown, G. R. (2016). Exaggerated sexual swellings in female non-human primates are reliable signals of female fertility and body condition. Animal Behaviour, 112, 203–212. https://doi.org/10.1016/j.anbehav.2015.11.023

Vancouver

Street S, Cross CP, Brown GR. Exaggerated sexual swellings in female non-human primates are reliable signals of female fertility and body condition. Animal Behaviour. 2016 Feb;112:203–212. https://doi.org/10.1016/j.anbehav.2015.11.023

Author

Street, Sally ; Cross, Catharine Penelope ; Brown, Gillian Ruth. / Exaggerated sexual swellings in female non-human primates are reliable signals of female fertility and body condition. In: Animal Behaviour. 2016 ; Vol. 112. pp. 203–212.

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@article{78a3d05ea0564284a050f549947faf6f,
title = "Exaggerated sexual swellings in female non-human primates are reliable signals of female fertility and body condition",
abstract = "In some species of Old World monkeys and apes, females exhibit exaggerated swellings of the anogenital region that vary in size across the ovarian cycle. Exaggerated swellings are typically largest around the time of ovulation, and swelling size has been reported to correlate positively with female quality, supporting the hypothesis that exaggerated swellings are honest signals of both female fecundity and quality. However, the relationship between swelling size and timing of ovulation is weak in some studies, and the relationship between swelling size and female quality has also not been consistently reported. Here, we collated empirical studies that have reported either i) swelling size and estimated timing of ovulation (N=26), or ii) swelling size and measures of individual quality (N=7), to assess the strength of these relationships using meta-analytic methods. Our analyses confirmed that the period of maximal swelling size is closely associated with the most fertile period of the ovarian cycle and that a large proportion of ovulations occur during the maximal swelling period. A small, positive effect size was also found for the relationship between swelling size and body condition. In contrast, the relationships with age and social rank were not significant. Swelling size, therefore, potentially signals both female condition and timing of the fertile phase. Males are likely to benefit from allocating mating effort according to swelling size, while females with large swellings potentially benefit from exerting control over matings in species where female control is compromised by male mating strategies.",
keywords = "Ornament, Graded signal, Ovulation, Reliable indicator, Quality",
author = "Sally Street and Cross, {Catharine Penelope} and Brown, {Gillian Ruth}",
year = "2016",
month = "2",
doi = "10.1016/j.anbehav.2015.11.023",
language = "English",
volume = "112",
pages = "203–212",
journal = "Animal Behaviour",
issn = "0003-3472",
publisher = "ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - Exaggerated sexual swellings in female non-human primates are reliable signals of female fertility and body condition

AU - Street, Sally

AU - Cross, Catharine Penelope

AU - Brown, Gillian Ruth

PY - 2016/2

Y1 - 2016/2

N2 - In some species of Old World monkeys and apes, females exhibit exaggerated swellings of the anogenital region that vary in size across the ovarian cycle. Exaggerated swellings are typically largest around the time of ovulation, and swelling size has been reported to correlate positively with female quality, supporting the hypothesis that exaggerated swellings are honest signals of both female fecundity and quality. However, the relationship between swelling size and timing of ovulation is weak in some studies, and the relationship between swelling size and female quality has also not been consistently reported. Here, we collated empirical studies that have reported either i) swelling size and estimated timing of ovulation (N=26), or ii) swelling size and measures of individual quality (N=7), to assess the strength of these relationships using meta-analytic methods. Our analyses confirmed that the period of maximal swelling size is closely associated with the most fertile period of the ovarian cycle and that a large proportion of ovulations occur during the maximal swelling period. A small, positive effect size was also found for the relationship between swelling size and body condition. In contrast, the relationships with age and social rank were not significant. Swelling size, therefore, potentially signals both female condition and timing of the fertile phase. Males are likely to benefit from allocating mating effort according to swelling size, while females with large swellings potentially benefit from exerting control over matings in species where female control is compromised by male mating strategies.

AB - In some species of Old World monkeys and apes, females exhibit exaggerated swellings of the anogenital region that vary in size across the ovarian cycle. Exaggerated swellings are typically largest around the time of ovulation, and swelling size has been reported to correlate positively with female quality, supporting the hypothesis that exaggerated swellings are honest signals of both female fecundity and quality. However, the relationship between swelling size and timing of ovulation is weak in some studies, and the relationship between swelling size and female quality has also not been consistently reported. Here, we collated empirical studies that have reported either i) swelling size and estimated timing of ovulation (N=26), or ii) swelling size and measures of individual quality (N=7), to assess the strength of these relationships using meta-analytic methods. Our analyses confirmed that the period of maximal swelling size is closely associated with the most fertile period of the ovarian cycle and that a large proportion of ovulations occur during the maximal swelling period. A small, positive effect size was also found for the relationship between swelling size and body condition. In contrast, the relationships with age and social rank were not significant. Swelling size, therefore, potentially signals both female condition and timing of the fertile phase. Males are likely to benefit from allocating mating effort according to swelling size, while females with large swellings potentially benefit from exerting control over matings in species where female control is compromised by male mating strategies.

KW - Ornament

KW - Graded signal

KW - Ovulation

KW - Reliable indicator

KW - Quality

U2 - 10.1016/j.anbehav.2015.11.023

DO - 10.1016/j.anbehav.2015.11.023

M3 - Article

VL - 112

SP - 203

EP - 212

JO - Animal Behaviour

T2 - Animal Behaviour

JF - Animal Behaviour

SN - 0003-3472

ER -

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