POGOe: Healthy Ager Life History Project

Natural history , life history , and

We report on basic natural history, life history, and diet of Priapella chamulae (Poeciliidae) from Arroyo Tres, a small creek in Tabasco, southern México. The tertiary (adult) sex ratio was heavily female-skewed, female P. chamulae produced medium-sized offspring (~2.3 mg), one clutch at a time (i.e., showed no superfetation), and relied predominantly on yolk for embryo provisioning (Matrotrop...

Myocardial infarction in a teen-ager.

Acknowledgements The extract from the MINAP database was provided through the MINAP Academic Group following peer review of our research proposal. We acknowledge all the hospitals in England and Wales for their contribution of data to MINAP. We gratefully acknowledge the funder of this research work, the Sir Halley Stewart Trust. There are no competing interests and the authors have nothing to ...

It's All Life History

different stages in the life cycle and to evolve specialised forms to go with them. This strategy is widely used — from the adult mayfly whose sole task it is to find a mate, to the ever-hungry caterpillar — and involves often dramatic bodily transformations between stages. Before the term 'life history' was even coined, such metamorphoses — like the tadpole turning into a frog illustrated on t...

Stress and life history

In his book on behavioural endocrinology, Randy Nelson describes 'stress' as a 'notoriously ethereal concept'. Yet, despite this lack of clarity, studies of the consequences of stress across different time scales, life history stages, taxa and levels of biological enquiry form a large part of modern biology and biomedicine. Organisms need to recognise and respond to environmental challenges. Be...

Healthy life years (HeaLYs)