Episode Details

We deep dive into the complex mechanisms of sex determination in birds, focusing on how environmental and physiological factors influence sex ratios.

Resources:

• Aslam, M. A., et al. (2014). Effect of corticosterone and hen body mass on primary sex ratio in laying hen (Gallus gallus), using unincubated eggs. Biology of Reproduction, 90(4).

• Curry, J., et al. (2023). Dietary fat supplements influence weight gain and egg production, but not offspring sex ratios in Japanese quail, Coturnix coturnix japonica. Journal of Avian Biology, 2023(5-6), e03081.

• Dorr, B. S., et al. (2014). Geographic segregation and evidence of density‐dependent changes in sex ratios in an abundant colonial waterbird. Integrative Zoology, 9(5), 570-582.

• Emam, A. M., et al. (2024). Is the sex ratio of Japanese quail offspring equal?. Tropical Animal Health and Production, 56(8), 384.

• Müller, W., et al. (2002). Sex differences in yolk hormones depend on maternal social status in Leghorn chickens (Gallus gallus domesticus). Proceedings of the Royal Society B: Biological Sciences, 269(1506), 2249.

• Pike, T. W., & Petrie, M. (2003). Potential mechanisms of avian sex manipulation. Biological reviews, 78(4), 553-574.

• Pike, T. W., & Petrie, M. (2005). Maternal body condition and plasma hormones affect offspring sex ratio in peafowl. Animal behaviour, 70(4), 745-751.

• Pinson, S. E., et al. (2015). Timing matters: corticosterone injections 4 h before ovulation bias sex ratios towards females in chickens. Journal of Comparative Physiology B, 185(5), 539-546.

• Sibiya, M. D., et al. (2025). Data integration reveals that a statewide corridor initiative maintains greater wild turkey relative abundance and occupancy. Landscape Ecology, 41(1), 6.

• Ulrey, E. E., et al. (2025). Female biased offspring sex ratios of eastern wild turkeys across the southeastern United States. Journal of Avian Biology, 2025(5), e03515.

• Wooten, M. T., et al. (2021). Effect of nutritional variance of energy and crude protein on sex ratio and development of W-36 parent offspring.

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