Ryan Schacht on Muck Rack

Ryan Schacht

As seen in: National Institutes of Health, Daily Mail, Wiley Online Library, ScienceDaily, The Conversation, The Epoch Times, Discover Magazine, The Citizen (South Africa), Inner Power
Anthropologist Assistant Professor East Carolina University
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Articles

In Utero Selection Echoes Across a Lifetime: Evidence From Historical Utah Populations

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By Tim A. Bruckner, Jason Bonham, Ryan Schacht
| Wiley Online Library Verified
1 Introduction An estimated 50%–70% of human conceptions do not survive to birth (Boklage 1990), and detected male fetal losses outnumber female losses by 9%–20% (Byrne and Warburton 1987; Ammon Avalos et al. 2012; Catalano et al. 2005a). Theory attributes this male-biased fetal loss in utero to mechanisms conserved by natural selection to spontaneously terminate gestations least likely to yield grandchildren (Wells 2000; Stearns 1987; Forbes 1997).
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The Secondary Sex Ratio and Male Mortality at Pre‐Reproductive Ages: A Test of Selection In Utero

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By Jason Bonham, Ryan Schacht, Ken Smith, Tim A. Bruckner
| Wiley Online Library Verified
Data Availability Statement The data that support the findings of this study are available from Utah Population Database. Restrictions apply to the availability of these data, which were used under license for this study. Data are available from https://uofuhealth.utah.edu/huntsman/utah-population-database with the permission of Utah Population Database.
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Was Cinderella just a fairy tale? Survival differences between stepchildren and their half-siblings

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By Ryan Schacht, Huong D. Meeks, Alison Fraser, Ken Smith
| royalsocietypublishing.org
Abstract The death of a parent, particularly the mother, is linked to a suite of negative outcomes across the life-course. Compounding concerns for child outcomes are expectations of poor treatment by step-parents after parental remarriage. Indeed, folk tales of step-parental abuse abound cross-culturally and are embedded into stories taught to children.
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