Incorporating effects of age on energy dynamics predicts nonlinear maternal allocation patterns in iteroparous animals.
Incorporating effects of age on energy dynamics predicts nonlinear maternal allocation patterns in iteroparous animals.
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DOI:
10.1098/rspb.2021.1884
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发表时间:
2022-02-23
期刊:
影响因子:
--
通讯作者:
English S
中科院分区:
文献类型:
--
作者:
Barreaux AMG;Higginson AD;Bonsall MB;English S
Iteroparous parents face a trade-off between allocating current resources to reproduction versus maximizing survival to produce further offspring. Parental allocation varies across age and follows a hump-shaped pattern across diverse taxa, including mammals, birds and invertebrates. This nonlinear allocation pattern lacks a general theoretical explanation, potentially because most studies focus on offspring number rather than quality and do not incorporate uncertainty or age-dependence in energy intake or costs. Here, we develop a life-history model of maternal allocation in iteroparous animals. We identify the optimal allocation strategy in response to stochasticity when energetic costs, feeding success, energy intake and environmentally driven mortality risk are age-dependent. As a case study, we use tsetse, a viviparous insect that produces one offspring per reproductive attempt and relies on an uncertain food supply of vertebrate blood. Diverse scenarios generate a hump-shaped allocation when energetic costs and energy intake increase with age and also when energy intake decreases and energetic costs increase or decrease. Feeding success and environmentally driven mortality risk have little influence on age-dependence in allocation. We conclude that ubiquitous evidence for age-dependence in these influential traits can explain the prevalence of nonlinear maternal allocation across diverse taxonomic groups.
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影响因子:
5.2
作者:
Barks, Patrick M.;Laird, Robert A.
通讯作者:
Laird, Robert A.
影响因子:
2.9
作者:
CLUTTONBROCK, TH
通讯作者:
CLUTTONBROCK, TH
影响因子:
4.8
作者:
EMLEN, JM
通讯作者:
EMLEN, JM
DOI:
10.1098/rspb.2014.0311
发表时间:
2014-06-22
期刊:
Proceedings. Biological sciences
影响因子:
--
作者:
Burton T;Metcalfe NB
通讯作者:
Metcalfe NB
DOI:
10.1111/j.1558-5646.2010.01198.x
发表时间:
2011-05
期刊:
Evolution; international journal of organic evolution
影响因子:
--
作者:
Fischer B;Dieckmann U;Taborsky B
通讯作者:
Taborsky B