Trade-Offs

Lemaître, Jean‐François; Cheynel, Louise; Douhard, Mathieu; Ronget, Victor; Gaillard, Jean‐Michel

doi:10.1016/b978-0-12-801238-3.11443-6

Cited by 3 publications

(6 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both the disposable soma (13) and antagonistic pleiotropy (14) theories of aging predict that allocation to reproduction early in life should be favored by selection at the cost of faster demographic senescence (the age-related decline in survival probability and reproduction). Such early-late life trade-offs have been found in various mammals and birds (15), but results are mixed overall (16). Aging studies have used a variety of metrics to measure allocation to reproduction during early life, such as age at first reproduction and number of offspring produced or reared up to a certain age (15).…”

mentioning

confidence: 99%

Sons accelerate maternal aging in a wild mammal

Douhard

Festa-Bianchet

Pelletier

2020

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

View full text Add to dashboard Cite

Aging, or senescence, is a progressive deterioration of physiological function with age. It leads to age-related declines in reproduction (reproductive senescence) and survival (actuarial senescence) in most organisms. However, senescence patterns can be highly variable across species, populations, and individuals, and the reasons for such variations remain poorly understood. Evolutionary theories predict that increases in reproductive effort in early life should be associated with accelerated senescence, but empirical tests have yielded mixed results. Although in sexually size-dimorphic species offspring of the larger sex (typically males) commonly require more parental resources, these sex differences are not currently incorporated into evolutionary theories of aging. Here, we show that female reproductive senescence varies with both the number and sex ratio of offspring weaned during early life, using data from a long-term study of bighorn sheep. For a given number of offspring, females that weaned more sons than daughters when aged between 2 and 7 y experienced faster senescence in offspring survival in old age. By contrast, analyses of actuarial senescence showed no cost of early-life reproduction. Our results unite two important topics in evolutionary biology: life history and sex allocation. Offspring sex ratio may help explain among-individual variation in senescence rates in other species, including humans.

show abstract

mentioning

confidence: 99%

Sons accelerate maternal aging in a wild mammal

Douhard

Festa-Bianchet

Pelletier

2020

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

View full text Add to dashboard Cite

show abstract

“…As we discussed, such lack of evidence may well reflect limitations in the measurement of self‐maintenance or in the data available so far in livestock to assess costs of high productivity on fitness‐related traits. However, it becomes increasingly clear that the resource allocation framework narrowly defined in terms of energy and nutrient supply and expenditure is insufficient to explain trade‐offs so that a more complete picture requires the integration of time constraints (Lemaître et al, 2020) and alternative physiological causes (Harshman & Zera, 2007; Leroi, 2001; Ricklefs & Wilkelski, 2002; Speakman, 2008; Zera & Harshman, 2001). Besides, evolutionary biologists and physiologists are converging towards a shared understanding of the molecular pathways underlying trade‐offs (Flatt & Heyland, 2011; Mauro & Ghalambor, 2020; Ng’oma et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…Most obviously, time must be limiting and time constraints remain independently of the amount and quality of resources available (Lemaître et al, 2020), leading to the existence of potential limits in the rate at which animal bodies metabolize and process energy (Hammond & Diamond, 1997). Animals selected for high productivity may increase their time spent foraging but such increase is inevitably limited.…”

Section: Box 1 Glossarymentioning

confidence: 99%

Section: Tr Ade-offs Defined In the Energy Allo C Ati On Fr Ame Workmentioning

confidence: 99%

“…Accordingly, several studies performed in the wild have revealed negative associations between the allocation to growth or reproduction and the subsequent survival or reproductive performance (Hamel et al, 2010; Lemaître et al, 2015). However, trade‐offs are far from being consistently detected and positive associations are commonly reported (Lemaître et al, 2015, 2020). Van Noordwijk and de Jong (1986) proposed that energy allocation trade‐offs should only occur when individual variation in resource allocation is larger than the variation in resource acquisition (a model called the ‘Y model’).…”

Section: Trade‐offs Defined In the Energy Allocation Frameworkmentioning

confidence: 99%

See 2 more Smart Citations

How much energetic trade‐offs limit selection? Insights from livestock and related laboratory model species

Douhard

Gilbert

et al. 2021

Evolutionary Applications

Self Cite

View full text Add to dashboard Cite

Trade-offs between life history traits are expected to occur due to the limited amount of resources that organisms can obtain and share among biological functions, but are of least concern for selection responses in nutrientrich or benign environments. In domestic animals, selection limits have not yet been reached despite strong selection for higher meat, milk or egg yields. Yet, negative genetic correlations between productivity traits and health or fertility traits have often been reported, supporting the view that trade-offs do occur in the context of nonlimiting resources. The importance of allocation mechanisms in limiting genetic changes can thus be questioned when animals are mostly constrained by their time to acquire and process energy rather than by feed availability. Selection for high productivity traits early in life should promote a fast metabolism with less energy allocated to self-maintenance (contributing to soma preservation and repair). Consequently, the capacity to breed shortly after an intensive period of production or to remain healthy should be compromised. We assessed those predictions in mammalian and avian livestock and related laboratory model species. First, we surveyed studies that compared energy allocation to maintenance between breeds or lines of contrasting productivity but found little support for the occurrence of an energy allocation tradeoff. Second, selection experiments for lower feed intake per unit of product (i.e. higher feed efficiency) generally resulted in reduced allocation to maintenance, but this did not entail fitness costs in terms of survival or future reproduction. These findings indicate that the consequences of a particular selection in domestic animals are much more difficult to predict than one could anticipate from the energy allocation framework alone. Future developments to predict the contribution of time constraints and tradeoffs to selection limits will be insightful to breed livestock in increasingly challenging environments.This is an open access article under the terms of the Creat ive Commo ns Attri bution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

show abstract

Scaling species interactions: implications for community ecology and biological scaling theory

Glazier

2023

Academia Biology

View full text Add to dashboard Cite

Background: Various biological properties of organisms relate to body size, often in regular quantifiable ways. Traditionally, these biological scaling relationships have been explained in terms of internal physical constraints, but recently external ecological factors have gained increasing attention. A major goal of my review is to expand a currently developing ecological perspective of biological scaling (allometry) to include species (biotic) interactions, with a major emphasis on predation, herbivory, and parasitism. Results: I review evidence for two major kinds of interspecific body-size scaling patterns: (1) negative relationships of predator species richness and body-size range with prey body size and (2) positive relationships of parasite/herbivore species richness and body-size range with host body size. I argue that these patterns can provide new insights into the structure/function of ecological communities (including latitudinal and trophic-level gradients in biotic interactions) and various biological scaling patterns at the organism, population, community, and ecosystem levels. I further argue that exploration of the body-size scaling of other kinds of biotic interactions (e.g., competition, mutualism, commensalism, and amensalism) would also be worthwhile. Conclusion: The major findings of this review provide further foundation for a "mortality theory of ecology" and a comprehensive theory of allometry that embraces both internal physical and external ecological factors, both currently under development. Body-size scaling of biotic interactions has not only important implications for the development of synthetic theory bridging community ecology and biological scaling, but also practical applications for understanding the effects of human exploitation and climate change on living systems.

show abstract

Trade-Offs

Cited by 3 publications

References 46 publications

Sons accelerate maternal aging in a wild mammal

Sons accelerate maternal aging in a wild mammal

How much energetic trade‐offs limit selection? Insights from livestock and related laboratory model species

Scaling species interactions: implications for community ecology and biological scaling theory

Contact Info

Product

Resources

About