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Socioeconomic status and sex ratio in the contemporary Hungarian population [PDF]
Evolutionary Human SciencesAccording to the Trivers–Willard hypothesis (TWH), when the mother's condition around conception influences the future reproductive success of male and female offspring differently, the adjustment of offspring sex ratio (SR) to maternal condition will ...
Fanni Sarkadi +2 more
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Heredity, 2002 Sex ratio theory attempts to explain variation at all levels (species, population, individual, brood) in the proportion of offspring that are male (the sex ratio). In many cases this work has been extremely successful, providing qualitative and even quantitative explanations of sex ratio variation.
West, Stuart A +2 more
openaire +7 more sources
Current Biology, 2017 Jennions et al. introduce the different kinds of sex ratio and their biology.
Jennions, Michael D. +3 more
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Does the Mother or Father Determine the Offspring Sex Ratio? Investigating the Relationship between Maternal Digit Ratio and Offspring Sex Ratio. [PDF]
PLoS ONE, 2015 In mammals, high parental testosterone levels present around the time of conception are thought to skew offspring sex ratio toward sons. The second to fourth digit ratio (digit ratio) is now widely accepted as a negative correlate of prenatal ...
Tae Beom Kim +4 more
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Comparison of the effect of sex ratio on the Partridge Alectoris chukar performance, which was bred under standard conditions in Nineveh [PDF]
مجلة جامعة كركوك للعلوم الزراعية, 2021 The research was carried out in the Livestock Research Division / Nineveh Research Department to study the effect of four different treatments of Sex ratio male: female (1: 1, 1: 2, 1: 3 and 1: 4), using 477 birds at production age, for 10 weeks on the ...
Firas Ibrahim +2 more
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eLife, 2022 Preference for sons and smaller families and, in the case of China, a one-child policy, have contributed to missing girl births in India and China over the last few decades due to sex-selective abortions.
Catherine Meh, Prabhat Jha
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Parasite stress predicts offspring sex ratio. [PDF]
PLoS ONE, 2012 In this study, I predict that the global variation of offspring sex ratio might be influenced in part by the level of parasite stress. From an energetic standpoint, higher gestational costs of producing a male offspring could decrease male births in a ...
Madhukar Shivajirao Dama
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Social Sciences, 2023 Researchers have long puzzled over suicidal behavior. In this paper, we posit that when people are unable to attract mates given unfavorable sex ratios, suicide rates increase. Sex ratio, the proportion of males in a population, is linked to a variety of
Kristin Snopkowski, Hallie Turner
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Mate limitation and sex ratio evolution [PDF]
Royal Society Open Science, 2018 Sex ratio evolution has been one of the most successful areas of evolutionary theory. Pioneered by Düsing and Fisher under panmixia, and later extended by Hamilton to cover local mate competition (LMC), these models often assume, either implicitly or ...
Jussi Lehtonen, Lisa E. Schwanz
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Widespread sex ratio polymorphism in Caenorhabditis nematodes
Royal Society Open Science, 2023 Although equal sex ratio is ubiquitous and represents an equilibrium in evolutionary theory, biased sex ratios are predicted for certain local conditions. Cases of sex ratio bias have been mostly reported for single species, but little is known about its
Yun Huang +7 more
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