A Mammalian Example of Semelparity

  title={A Mammalian Example of Semelparity},
  author={Richard S. W. Braithwaite and Anthony K. Lee},
  journal={The American Naturalist},
  pages={151 - 155}
Boom and bust: a review of the physiology of the marsupial genus Antechinus
The high degree of life history synchrony and the cascade of endocrine-driven physiological events that result in male death are unusual physiological characteristics for mammals.
Eimeria taggarti N. Sp., a Novel Coccidian (Apicomplexa: Eimeriorina) in the Prostate of an Antechinus flavipes
Bayesian phylogenetic analysis based on 18S rDNA gene sequences revealed that the novel coccidian clusters with reptile-host coccidians, forming an ancestral basal lineage of the eimeriid clade.
Breeding biology and growth in a new, threatened carnivorous marsupial
There was a marked difference in A. argentus numbers between years and sites, and it is hypothesised that the disparate capture rates between sites may be at least in part linked to the effects of fire on vegetation.
Sperm competition drives the evolution of suicidal reproduction in mammals
It is shown that as marsupial predators in Australia, South America, and Papua New Guinea diversified into higher latitudes, seasonal predictability in abundance of their arthropod prey increased in multiple habitats, and precopulatory sexual selection by females favored the evolution of suicidal reproduction in mammals.
Semelparity and Factors Affecting the Reproductive Activity of the Brazilian Slender Opossum (Marmosops paulensis) in Southeastern Brazil
It is suggested that fruit availability controlled the length of breeding activity in M. paulensis, and it could play a role in the occurrence of semelparity in this species, however, semelParity may occur only due to phylogenetic constraints, whereas food supply works as a selective force maintaining this trait.
Size breeds success: multiple paternity, multivariate selection and male semelparity in a small marsupial, Antechinus stuartii
Investigation of selection in male brown antechinus, Antechinus stuartii, and paternity success in 119 males is found to be related most strongly to body mass and scrotal size, thus providing support for both hypotheses for the evolution of semelparity.
A chromosome‐level genome of Antechinus flavipes provides a reference for an Australian marsupial genus with male death after mating
The chromosome‐level A. flavipes genome provides a steppingstone to understanding an enigmatic life‐history strategy and a resource to assist the conservation of antechinuses.
Reproductive Suicide: Similar Mechanisms of Aging in C. elegans and Pacific Salmon
It is argued that mechanisms of senescence operative in reproductive death exist in a less catastrophic form in iteroparous organisms, particularly those that involve costly resource reallocation, and exhibit endocrine-regulated plasticity.


Corticosteroid levels and male mortality in Antechinus stuartii
Examining populations with simple, easily determined age structure, which also show abrupt changes in numbers, is begun.
An ecological study of Antechinus stuartii (Marsupialia) in a south-east Queensland rain forest
  • D. Wood
  • Environmental Science, Biology
  • 1970
Mortality had a greater influence on population size than reproduction, and late sexual maturity and stereotyped reproductive pattern seem to preclude cyclical changes in population density.
Environmental Certainty, Trophic Level, and Resource Availability in Life History Evolution
This work uses well-studied examples from the literature to identify causal mechanisms in the evolution of many well-known organisms and suggests the density of the population in relation to resources, the trophic and successional position of the Population, and predictability of mortality patterns all appear to be important determinants of adaptive strategies.
Optimal Reproductive Effort in Fluctuating Environments
When the life history functions B (E) and P (E)-fecundity and postbreeding survival-are subject to environmentally induced fluctuations, one of two patterns is selected for: If the functions are
Pattern in Life History and the Environment
  • G. I. Murphy
  • Environmental Science
    The American Naturalist
  • 1968
The possibility that iteroparity may be an evolutionary response to uncertain survival from zygote to first maturity is examined in a competition model and a genetic model and suggests the approach may contribute to understanding the dynamics of evolution.
Gonadal Activity in the Marsupial Mouse, Antechinus Bellus, with Notes on Other Species of the Genus (Marsupialia: Dasyuridae)
The fragments of information gathered to date on the genus Ante-chinus in Australia all give supporting evidence that from the tropics to southernmost Australia these small dasyurids are winter
An Altitudinal Survey of Reproduction in Peromyscus Maniculatus
pools, and a few are known to have deposited 2 sets of eggs in a single season. The number of toads in the breeding population appears to he limited by a density dependent factor or factors. A place
Selection for Optimal Life Histories: The Effects of Age Structure
It is shown that an optimal life history maximizes for each age class the expected fecundity at that age plus the sum of all future expected parameters, which suggests that related species, with similar ecologies, may have very different life histories, the differences resulting from historical accidents that have trapped each on a different adaptive peak.