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Zoology and wildlife conservation

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Abstracts » Zoology and wildlife conservation

Middle-aged mothers live longer

Article Abstract:

Research suggests that women who have children in middle-age live to an older age than those who have children when young. Historical records have been used to show that a significant number of women who were older mothers live longer than those who were younger mothers. Evidence suggests that the human lifespan is extending through natural selection. Further research is required to establish genetic variations in relation to reproduction and age-related disease.

Author: Fretts, Ruth C., Peris, Thomas, Alpert, Laura
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
Middle age, Genetic aspects, Motherhood, Delivery (Childbirth), Childbirth in middle age

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Highly fecund mothers sacrifice offspring survival to maximize fitness

Article Abstract:

The causal consequences of offspring size in a wild population of Atlantic salmon are considered. It is suggested that maximization of maternal fitness by sacrificing offspring survival could be a general phenomenon among extremely fecund organisms.

Author: Einum, Sigurd, Fleming, Ian A.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
Animal ecology

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Maternal age and traits in offspring

Article Abstract:

A new study investigates the age of first pregnancy in mice and how varying levels of maternal steroid hormones influence the growth and sexual maturation of their offspring.

Author: Wang, Ming-Hseng, vom Saal, Frederick S.
Publisher: Macmillan Publishing Ltd.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2000
Maternal age

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