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Preprints

Filtering by Subject: Comparative and Evolutionary Physiology

Rapid-warming tolerance correlates with tolerance to slow warming but not growth at non-optimal temperatures in zebrafish

Eirik Ryvoll Åsheim, Anna H. Andreassen, Rachael Morgan, et al.

Published: 2020-05-08
Subjects: Comparative and Evolutionary Physiology, Life Sciences, Physiology

Global warming is predicted to increase both acute and prolonged thermal challenges for aquatic ectotherms. Severe short and medium-term thermal stress over hours to days may cause mortality, while longer sub-lethal thermal challenges may cause performance declines. The interrelationship between the responses to short, medium and longer thermal challenges is unresolved. We asked if the same [...]

The Evolutionary Ecology of Age at Natural Menopause: Implications for Public Health

Abigail Fraser, Elise Whitley, Cathy Johnman, et al.

Published: 2020-02-11
Subjects: Comparative and Evolutionary Physiology, Ecology and Evolutionary Biology, Life Sciences, Medicine and Health Sciences, Other Ecology and Evolutionary Biology, Other Medicine and Health Sciences, Other Social and Behavioral Sciences, Physiology, Social and Behavioral Sciences

Evolutionary perspectives on menopause have focused on explaining why early reproductive cessation in females has emerged and why it is rare throughout the animal kingdom, but less attention has been given to exploring patterns of diversity in age at natural menopause. In this paper, we aim to generate new hypotheses for understanding human patterns of diversity in this trait, defined as age at [...]

Aerobic scope protection reduces ectotherm growth under warming

Fredrik Jutfelt, Tommy Norin, Eirik Ryvoll Åsheim, et al.

Published: 2020-01-23
Subjects: Animal Sciences, Comparative and Evolutionary Physiology, Life Sciences, Physiology, Zoology

Temperature has a dramatic effect on the physiology of ectothermic animals, impacting most of their biology. When temperatures increase above optimal for an animal, their growth gradually decreases. The main mechanism behind this growth rate reduction is unknown. Here, we suggest the ‘aerobic scope protection’ hypothesis as a mechanistic explanation for the reduction in growth. After a meal, [...]

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