Life history theory has become a prominent framework in the evolutionary social sciences,
and the concept of trade-offs, the cornerstone of life history theory in studies on non-human …

For the most part solutions to farm animal welfare issues, such as piglet mortality, are likely
to lie within the scientific disciplines of environmental design and genetic selection, however …

A shift from the traditional perspective that maternal stress is invariably costly has instigated
recent interest into its adaptive role in offspring sex allocation. Stress generated by social …

Failure to balance daily energy expenditure (DEE) with energy intake can have an impact on
survival and reproduction, and therefore on the persistence of populations. Here we study …

Recent research has found empirical evidence in support of the Trivers-Willard Hypothesis
that offspring sex allocation is correlated with maternal investment. Tammar wallabies …

To investigate flexibility in vocal signaling by rodent pups, we examined whether olfactory
stimuli influence characteristics of pup calls and how these calls may be affected by sex and …

Across animal taxa, reproductive success is generally more variable and more strongly
dependent upon body condition for males than for females; in such cases, parents able to …

Females in a variety of taxa adjust offspring sex ratios to prevailing ecological conditions.
However, little is known about whether conditions experienced during a female's early …

Brood sex ratios (BSRs) have often been found to be nonrandom in respect of parental and
environmental quality, and many hypotheses suggest that nonrandom sex ratios can be …

Individuals must trade‐off between energetically costly activities to maximize their fitness.
However, the underlying physiological mechanism remains elusive. Oxidative stress, the …