Header

UZH-Logo

Maintenance Infos

Population Density and Temperature Influence the Return on Maternal Investment in Wild House Mice


Gerber, Nina; Auclair, Yannick; König, Barbara; Lindholm, Anna K (2021). Population Density and Temperature Influence the Return on Maternal Investment in Wild House Mice. Frontiers in Ecology and Evolution, 8:602359.

Abstract

In mammals, reproduction is influenced by sexual competition, temperature and food availability and these factors might be crucial already during early life. Favorable early life environment and high maternal investment are expected to improve survival and reproduction. For example, in mammals, maternal investment via lactation predicts offspring growth. As body mass is often associated with fitness consequences, females have the potential to influence offspring fitness through their level of investment, which might interact with effects of population density and temperature. Here, we investigate the relationship between house mouse (<jats:italic>Mus musculus domesticus</jats:italic>) pup body mass at day 13 (used as approximation for weaning mass) and individual reproductive parameters, as well as longevity, under natural variation in population density and temperature (as approximation for season). Further, we assessed the extent to which mothers influence the body mass of their offspring until weaning. To do so, we analyzed life data of 384 house mice from a free-living wild commensal population that was not food limited. The mother’s contribution accounted for 49% of the variance in pup body mass. Further, we found a complex effect of population density, temperature and maternal investment on life-history traits related to fitness: shorter longevity with increasing pup body mass at day 13, delayed first reproduction of heavier pups when raised at warmer temperatures, and increased lifetime reproductive success for heavier pups at high densities. Our study shows that the effects of maternal investment are not independent of the effects of the environment. It thus highlights the importance of considering ecological conditions in combination with maternal effects to unravel the complexity of pup body mass on fitness measures.

Abstract

In mammals, reproduction is influenced by sexual competition, temperature and food availability and these factors might be crucial already during early life. Favorable early life environment and high maternal investment are expected to improve survival and reproduction. For example, in mammals, maternal investment via lactation predicts offspring growth. As body mass is often associated with fitness consequences, females have the potential to influence offspring fitness through their level of investment, which might interact with effects of population density and temperature. Here, we investigate the relationship between house mouse (<jats:italic>Mus musculus domesticus</jats:italic>) pup body mass at day 13 (used as approximation for weaning mass) and individual reproductive parameters, as well as longevity, under natural variation in population density and temperature (as approximation for season). Further, we assessed the extent to which mothers influence the body mass of their offspring until weaning. To do so, we analyzed life data of 384 house mice from a free-living wild commensal population that was not food limited. The mother’s contribution accounted for 49% of the variance in pup body mass. Further, we found a complex effect of population density, temperature and maternal investment on life-history traits related to fitness: shorter longevity with increasing pup body mass at day 13, delayed first reproduction of heavier pups when raised at warmer temperatures, and increased lifetime reproductive success for heavier pups at high densities. Our study shows that the effects of maternal investment are not independent of the effects of the environment. It thus highlights the importance of considering ecological conditions in combination with maternal effects to unravel the complexity of pup body mass on fitness measures.

Statistics

Citations

Dimensions.ai Metrics

Altmetrics

Downloads

31 downloads since deposited on 02 Feb 2021
31 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Evolutionary Biology and Environmental Studies
Dewey Decimal Classification:570 Life sciences; biology
590 Animals (Zoology)
Language:English
Date:2 February 2021
Deposited On:02 Feb 2021 10:01
Last Modified:02 Feb 2021 10:01
Publisher:Frontiers Research Foundation
ISSN:2296-701X
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.3389/fevo.2020.602359
Project Information:
  • : FunderSNSF
  • : Grant ID31003A-120444
  • : Project TitleMaternal selection in a population of wild house mice
  • : FunderSNSF
  • : Grant ID31003A_176114
  • : Project TitleCauses and consequences of social interactions in free-living female house mice (Mus musculus domesticus)
  • : FunderClaraz Foundation
  • : Grant ID
  • : Project Title
  • : FunderPromotor Stiftung
  • : Grant ID
  • : Project Title
  • : FunderBaugarten Stiftung
  • : Grant ID
  • : Project Title
  • : FunderJulius Klaus Stiftung
  • : Grant ID
  • : Project Title

Download

Gold Open Access

Download PDF  'Population Density and Temperature Influence the Return on Maternal Investment in Wild House Mice'.
Preview
Content: Published Version
Filetype: PDF
Size: 1MB
View at publisher
Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)