Multimodal sexual signals are not precise indicators of fertility in female Kinda baboons.

Autor: Petersdorf M; Department of Anthropology, New York University, 25 Waverly Pl., New York, NY 10003, United States. Electronic address: megan.petersdorf@nyu.edu., Weyher AH; Department of Anthropology, University of Massachusetts Amherst, 240 Hicks Way, Amherst, MA 01003, United States., Heistermann M; Endocrinology Laboratory, German Primate Center, Leibniz Institute for Primate Research, Kellnerweg 4, Göttingen 37077, Germany. Electronic address: mheistermann@dpz.eu., Gunson JL; Department of Anthropology, New York University, 25 Waverly Pl., New York, NY 10003, United States. Electronic address: jessica.gunson@nyu.edu., Govaerts A; Department of Conservation Ecology and Entomology, Stellenbosch University, Private Bag X1, Matieland, 7602 Stellenbosch, South Africa., Siame S; Kasanka National Park, P.O. Box 850073, Serenje, Zambia., Mustill RL; Department of Anthropology, New York University, 25 Waverly Pl., New York, NY 10003, United States; Department of Anthropology, Columbia University, 1200 Amsterdam Ave, Schermerhorn Extension, New York, NY 10027, United States. Electronic address: rlmustill@tamu.edu., Hillegas ME; Department of Anthropology, New York University, 25 Waverly Pl., New York, NY 10003, United States. Electronic address: mhillegas@gwu.edu., Winters S; School of Biological Sciences, University of Bristol, Life Sciences Building, 24 Tyndall Avenue, Bristol BS8 1TQ, United Kingdom. Electronic address: sandra.winters@helsinki.fi., Dubuc C; Department of Anthropology, New York University, 25 Waverly Pl., New York, NY 10003, United States., Higham JP; Department of Anthropology, New York University, 25 Waverly Pl., New York, NY 10003, United States. Electronic address: jhigham@nyu.edu.
Jazyk: angličtina
Zdroj: Hormones and behavior [Horm Behav] 2024 Sep; Vol. 165, pp. 105632. Date of Electronic Publication: 2024 Sep 07.
DOI: 10.1016/j.yhbeh.2024.105632
Abstrakt: Female fertility signals are found across taxa, and the precision of such signals may be influenced by the relative strength of different sexual selection mechanisms. Among primates, more precise signals may be found in species with stronger direct male-male competition and indirect female mate choice, and less precise signals in species with stronger indirect male-male competition (e.g. sperm competition) and direct female mate choice. We tested this hypothesis in a wild population of Kinda baboons in Zambia, combining data on female signals with reproductive hormones (estrogen and progesterone metabolites) and intra- and inter-cycle fertility. We predicted that Kinda baboons will exhibit less precise fertility signals than other baboon species, as they experience weaker direct and stronger indirect male-male competition. The frequency of copulation calls and proceptive behavior did not vary with hormones or intra- or inter-cycle fertility in almost all models. Sexual swelling size was predicted by the ratio of estrogen to progesterone metabolites, and was largest in the fertile phase, but differences in size across days were small. Additionally, there was variability in the timing of ovulation relative to the day of sexual swelling detumescence across cycles and swelling size did not vary with inter-cycle fertility. Our results suggest that female Kinda baboon sexual swellings are less precise indicators of fertility compared to other baboon species, while signals in other modalities do not reflect variation in intra- and inter-cycle fertility. Female Kinda baboon sexual signals may have evolved as a strategy to reduce male monopolizability, allowing for more female control over reproduction by direct mate choice.
Competing Interests: Declaration of competing interest None.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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