Browsing Open Access by Author "Schacht, Ryan"
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Patterning of Paternal Investment in Response to Socioecological Change
Schacht, Ryan; Davis, Helen E.; Kramer, Karen L. (2018-10-17)Human paternal investment, and that of many other species, is facultatively expressed and dependent on a diverse array of individual, social, and ecological conditions. Well-documented are the various ways in which men ... -
Sex ratios at birth vary with environmental harshness but not maternal condition
Schacht, Ryan; Tharp, Douglas; Smith, Ken R. (2019-06-21)The sex ratio at birth (SRB) may be patterned by maternal condition and/or environmental stressors. However, despite decades of research, empirical results from across the social and biological sciences are equivocal on ...