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<p>Glass frogs (Centrolenidae) have been proposed as valuable model systems for studying the evolutionary ecology of reproductive behavior in vertebrates. Yet, little is known about how consistent mating patterns can be maintained across years and generations within a population, which is critical for understanding how sexual selection shapes and maintains species-specific traits. We analyzed capture–recapture data and records of reproductive behavior from a population of the glass frog <i>Espadarana prosoblepon</i> in the Central Andes of Colombia, collected over four sampling periods between December 2013 and June 2024. In all periods, male mating probability was positively associated with chorus tenure, the number of nights a male remained active in its territory, but unrelated to body size. Moreover, no assortative mating by body size was detected between amplectant males and females. These findings provide multi-year evidence of sexual selection acting on <i>E. prosoblepon</i>, mediated by male–male competition through endurance rivalry and potentially influenced by passive female choice. More broadly, our results illustrate how mating systems may remain stable over time while still being sensitive to ecological or experimental disturbances (in one period males were experimentally translocated for studying homing), offering insights into the dynamics of sexual selection in species with prolonged breeding periods.</p>

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Male mating success in the glass frog Espadarana prosoblepon is driven by chorus tenure across years

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • Sofía Acosta-Cruz,
  • Paula Navarro-Salcedo,
  • Leonardo Cifuentes-Serna,
  • María Camila Basto-Riascos,
  • Jhulyana López-Caro,
  • Daniela Gómez-Murcia,
  • María del Mar Bedoya-Ospina,
  • Luisa F. Arcila-Pérez,
  • Fernando Vargas-Salinas

摘要

Glass frogs (Centrolenidae) have been proposed as valuable model systems for studying the evolutionary ecology of reproductive behavior in vertebrates. Yet, little is known about how consistent mating patterns can be maintained across years and generations within a population, which is critical for understanding how sexual selection shapes and maintains species-specific traits. We analyzed capture–recapture data and records of reproductive behavior from a population of the glass frog Espadarana prosoblepon in the Central Andes of Colombia, collected over four sampling periods between December 2013 and June 2024. In all periods, male mating probability was positively associated with chorus tenure, the number of nights a male remained active in its territory, but unrelated to body size. Moreover, no assortative mating by body size was detected between amplectant males and females. These findings provide multi-year evidence of sexual selection acting on E. prosoblepon, mediated by male–male competition through endurance rivalry and potentially influenced by passive female choice. More broadly, our results illustrate how mating systems may remain stable over time while still being sensitive to ecological or experimental disturbances (in one period males were experimentally translocated for studying homing), offering insights into the dynamics of sexual selection in species with prolonged breeding periods.