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Ontogenetic colour change of a sexual ornament in males of a damselfly: female mimicry, crypsis or both?

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Abstract

Female mimicry by males is a widespread phenomenon in several taxa and may be involved in aggression avoidance or facilitated access to resources. In early developmental stages, female mimicry may be a mechanism involved in signalling sexual immaturity or, when coupled with strategies related to visual camouflage, may be involved in the avoidance of male-male agonistic interactions. Here, we addressed whether the delayed colour maturation of a sexual ornament in males of Mnesarete pudica damselflies might be a case of crypsis, female mimicry or both. We analysed how conspecifics and predators perceive the pigmented wings of juvenile males by contrasting the wing spectra against a savannah background and the wings of both juvenile and sexually mature males and females. Our results based on the modelled visual system of conspecifics and predators suggest that the colour maturation of juvenile males may function as both crypsis and female mimicry. We discuss whether these results related to age- and sexual-dichromatism might be a mechanism to avoid unwanted intraspecific interactions or to avoid territorial and aggressive males. We conclude that the female mimicry and crypsis in juvenile males of M. pudica are mechanisms involved in avoidance of predators and unwanted intraspecific interactions, and the signalling of sexual maturity.

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Acknowledgements

RRC thanks Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for a scholarship funding (Proc. 147742/2018-8 and Proc. 130346/2020-9). RGF thanks CNPq (Proc. 307836/2019-3) for financial support. EMT thanks INCT/INEO (Brazil), FAPEMAT (Process: 0273976/2017) and the Government of the State of Mato Grosso.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico

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Correspondence to Rhainer Guillermo-Ferreira.

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Communicated by: José Eduardo Serrão

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Cezário, R.R., Therézio, E.M., Marletta, A. et al. Ontogenetic colour change of a sexual ornament in males of a damselfly: female mimicry, crypsis or both?. Sci Nat 109, 2 (2022). https://doi.org/10.1007/s00114-021-01775-5

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  • DOI: https://doi.org/10.1007/s00114-021-01775-5

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