Survival to reproductive cessation drives variation in post-reproductive lifespan

Beate Proske, Oskar Burger, Daniel Levitis

Research output: Contribution to conference without publisher/journalConference abstract for conferenceResearch

Abstract

How many post-reproductive individuals are found in a population depends on how many individuals survive to reproductive cessation and how long they live thereafter. Post-reproductive Representation (PrR), a measure of post-reproductive lifespan intended for interspecific comparisons, allows a close examination, via decomposition, of the relative importance of survival to and life-expectancy after cessation. We show that the survival portion of PrR, rather than the life-expectancy portion, is the primary driver of variation in PrR. Variation in survival to reproductive cessation explains the majority of variation in PrR among a group of small cohorts of rotifers, and among several historical Swedish cohorts. We emphasize that women are distinct from other primates in the proportion reaching reproductive cessation, but not in the proportion of adult life-expectancy that is post-reproductive. Research on the evolution of post-reproductive lifespan should take into account the primary importance of survival to reproductive cessation, rather than focusing on the length of life thereafter.
Original languageEnglish
Publication date2014
Publication statusPublished - 2014

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Rotifera
Primates
degradation

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abstract = "How many post-reproductive individuals are found in a population depends on how many individuals survive to reproductive cessation and how long they live thereafter. Post-reproductive Representation (PrR), a measure of post-reproductive lifespan intended for interspecific comparisons, allows a close examination, via decomposition, of the relative importance of survival to and life-expectancy after cessation. We show that the survival portion of PrR, rather than the life-expectancy portion, is the primary driver of variation in PrR. Variation in survival to reproductive cessation explains the majority of variation in PrR among a group of small cohorts of rotifers, and among several historical Swedish cohorts. We emphasize that women are distinct from other primates in the proportion reaching reproductive cessation, but not in the proportion of adult life-expectancy that is post-reproductive. Research on the evolution of post-reproductive lifespan should take into account the primary importance of survival to reproductive cessation, rather than focusing on the length of life thereafter.",
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Survival to reproductive cessation drives variation in post-reproductive lifespan. / Proske, Beate; Burger, Oskar; Levitis, Daniel.

2014.

Research output: Contribution to conference without publisher/journalConference abstract for conferenceResearch

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T1 - Survival to reproductive cessation drives variation in post-reproductive lifespan

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AU - Burger, Oskar

AU - Levitis, Daniel

PY - 2014

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AB - How many post-reproductive individuals are found in a population depends on how many individuals survive to reproductive cessation and how long they live thereafter. Post-reproductive Representation (PrR), a measure of post-reproductive lifespan intended for interspecific comparisons, allows a close examination, via decomposition, of the relative importance of survival to and life-expectancy after cessation. We show that the survival portion of PrR, rather than the life-expectancy portion, is the primary driver of variation in PrR. Variation in survival to reproductive cessation explains the majority of variation in PrR among a group of small cohorts of rotifers, and among several historical Swedish cohorts. We emphasize that women are distinct from other primates in the proportion reaching reproductive cessation, but not in the proportion of adult life-expectancy that is post-reproductive. Research on the evolution of post-reproductive lifespan should take into account the primary importance of survival to reproductive cessation, rather than focusing on the length of life thereafter.

M3 - Conference abstract for conference

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