Phenotypes of Two Generations of Sporobolus airoides Seedlings Derived from Acroptilon repens-invaded and Non-invaded Grass Populations

Individuals within populations vary enormously in mortality risk and longevity, but the causes of this variation remain poorly understood. A potentially important and phylogenetically widespread source of such variation is maternal age at breeding, which typically has negative effects on offspring longevity. Here, we show that paternal age can affect offspring longevity as strongly as maternal age does, and that breeding age effects can interact over two generations in both matrilines and patrilines. We manipulated maternal and paternal ages at breeding over two generations in the neriid fly Telostylinus angusticollis. To determine whether breeding age effects can be modulated by the environment, we also manipulated larval diet and male competitive environment in the first generation. We found separate and interactive effects of parental and grandparental ages at breeding on descendants’ mortality rate and lifespan in both matrilines and patrilines. These breeding age effects were not modulated by grandparental larval diet quality or competitive environment. Our findings suggest that variation in maternal and paternal ages at breeding could contribute substantially to intra-population variation in mortality and longevity.

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Slee, Two Generations of Edinburgh Folk; MacDougall, ‘Hard work, ye ken’: Midlothian Women Farmworkers; MacDougall, Hoggie's Angels: Tattie Howkers Remember; MacDougall, Mungo Mackay and the Green Table; MacKenzie, A Mallaig Boyhood; MacLean, Your Father and I; Gray, Timber!; McVeigh, ‘Looking After the Bairns’: A Childhood in East Lothian

The Scottish Historical Review ◽

10.3366/shr.2002.81.1.120 ◽

2002 ◽

Vol 81 (1) ◽

pp. 120-124

Author(s):

William Kenefick

Keyword(s):

Hard Work ◽

Two Generations

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ANALYSIS OF ABDOMINAL TYPHOID INCIDENCE IN THE SOUTH REGION OF THE KYRGYZ REPUBLIC

Natural resources of the Earth and environmental protection ◽

10.26787/nydha-2713-203x-2020-1-10-11-12-43-48 ◽

2020 ◽

pp. 43-48

Author(s):

Zakirova J.S. ◽

Nadirbekova R.A. ◽

Zholdoshev S.T.

Keyword(s):

Drinking Water ◽

Typhoid Fever ◽

Risk Groups ◽

The Body ◽

Kyrgyz Republic ◽

Radiation Factor ◽

High Quality ◽

Two Generations ◽

Immunological Deficiency

The article analyze the long-term morbidity, spread of typhoid fever in the southern regions of the Kyrgyz republic, and remains a permanent epidemic focus in the Jalal-Abad region, where against the low availability of the population to high-quality drinking water, an additional factor on the body for more than two generations and radiation factor, which we confirmed by the spread among the inhabitants of Mailuu-Suu of nosological forms of the syndrome of immunological deficiency, as a predictor of risk groups for infectious diseases, including typhoid fever.

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