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Demographic and hormonal evidence for menopause in wild chimpanzees

https://doi.org/10.1126/science.add5473

Wood, Brian M; Negrey, Jacob D; Brown, Janine L; Deschner, Tobias; Thompson, Melissa Emery; Gunter, Sholly; Mitani, John C; Watts, David P; Langergraber, Kevin E (October 2023, Science)

Among mammals, post-reproductive life spans are currently documented only in humans and a few species of toothed whales. Here we show that a post-reproductive life span exists among wild chimpanzees in the Ngogo community of Kibale National Park, Uganda. Post-reproductive representation was 0.195, indicating that a female who reached adulthood could expect to live about one-fifth of her adult life in a post-reproductive state, around half as long as human hunter-gatherers. Post-reproductive females exhibited hormonal signatures of menopause, including sharply increasing gonadotropins after age 50. We discuss whether post-reproductive life spans in wild chimpanzees occur only rarely, as a short-term response to favorable ecological conditions, or instead are an evolved species-typical trait as well as the implications of these alternatives for our understanding of the evolution of post-reproductive life spans.
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Catalytic Deuteration of C(sp ² )–H Bonds of Substituted (Hetero)arenes in a Pt(II) CNN-Pincer Complex/2,2,2-Trifluoroethanol- d ₁ System: Effect of Substituents on the Reaction Rate and Selectivity

https://doi.org/10.1021/acs.organomet.0c00652

Kramer, Morgan; Watts, David; Vedernikov, Andrei N. (November 2020, Organometallics)
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Consecutive C–H and O ₂ Activation at a Pt(II) Center To Produce Pt(IV) Aryls

https://doi.org/10.1021/acs.organomet.8b00662

Watts, David; Zavalij, Peter Y.; Vedernikov, Andrei N. (November 2018, Organometallics)

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Circum‐Arctic distribution of chemical anti‐herbivore compounds suggests biome‐wide trade‐off in defence strategies in Arctic shrubs

https://doi.org/10.1111/ecog.06166

Lindén, Elin; te Beest, Mariska; Abreu, Ilka N.; Moritz, Thomas; Sundqvist, Maja K.; Barrio, Isabel C.; Boike, Julia; Bryant, John P.; Bråthen, Kari Anne; Buchwal, Agata; et al (June 2022, Ecography)

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