ArticleProceedings. Biological sciences2018
Prey productivity and predictability drive different axes of life-history variation in carnivorous marsupials.
Article in Proceedings. Biological sciences, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Marsupial position on life-history continua and the potential contribution of life-history traits to population growth.Proceedings. Biological sciences · 2023Article
- Resting disparity in quoll semelparity: examining the sex-linked behaviours of wild roaming northern quolls (Royal Society open science · 2023Article
- A chromosome-level genome of Antechinus flavipes provides a reference for an Australian marsupial genus with male death after mating.Molecular ecology resources · 2022Article
- A Chromosome-Level Genome of the Agile Gracile Mouse Opossum (Gracilinanus agilis).Genome biology and evolution · 2021Article
- Inbreeding depression in one of the last DFTD-free wild populations of Tasmanian devils.PeerJ · 2020Article
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Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Variation in life-history strategies has usually been characterized as a single fast-slow continuum of life-history variation, in which mean lifespan increases with age at maturity as reproductive output at each breeding event declines. Analyses of plants and animals suggest that strategies of reproductive timing can vary on an independent axis, with iteroparous species at one extreme and semelparous species at the other. Insectivorous marsupials in the Family Dasyuridae have an unusually wide range of life-history strategies on both purported axes. We test and confirm that reproductive output and degree of iteroparity are independent in females across species. Variation in reproductive output per episode is associated with mean annual rainfall, which predicts food availability. Position on the iteroparity-semelparity axis is not associated with annual rainfall, but species in regions of unpredictable rainfall have longer maximum lifespans, more potential reproductive events per year, and longer breeding seasons. We suggest that these two axes of life-history variation arise because reproductive output is limited by overall food availability, and selection for high offspring survival favours concentrated breeding in seasonal environments. Longer lifespans are favoured when reproductive opportunities are dispersed over longer periods in environments with less predictable food schedules.
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