Data from: Digit ratio predicts the number of lifetime recruits in female collared flycatchers

Gergely Nagy, Laszlo Zsolt Garamszegi, Gergely Hegyi, Márton Herényi, Miklós Laczi, Balázs Rosivall, Eszter Szöllősi & János Török
The early environment in which an organism grows can have long-lasting impact on both its phenotype and fitness. However, assessing this environment comprehensively is a formidable task. The relative length of the second to the fourth digit (2D:4D) is a broadly studied skeletal trait that is fixed for life during ontogeny. 2D:4D has been shown to indicate various early effects including the perinatal steroid milieu in both humans and non-human animals. However, the fitness relevance...
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