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The evolution of life histories
There are provided novel mercapto- or alkylthio-substituted oxo-terpenoids having 10 carbon atoms in the terpenoid skeleton. These novel compounds may be acyclic monocyclic or bicyclic. The novel
Unrepeatable repeatabilities: a common mistake
TLDR
The correct calculation of repeatability is outlined, a common mistake is pointed out, how the incorrectly calculated value relates to repeatable values is shown, and a method for checking published values and calculating approximate repeatability values from the F ratio is provided.
Warmer springs lead to mistimed reproduction in great tits (Parus major)
TLDR
This work believes that this is the first documented case of an adaptive response being hampered because a changing abiotic factor affects the environment in which a reproductive decision is made differently from the environments in which selection occurs.
Climate change and population declines in a long-distance migratory bird
TLDR
In a comparison of nine Dutch populations, it is found that populations have declined by about 90% over the past two decades in areas where the food for provisioning nestlings peaks early in the season and the birds are currently mistimed.
Manipulative Signals in Family Conflict? On the Function of Maternal Yolk Hormones in Birds
TLDR
It is suggested that for a full understanding of the evolution of hormone‐mediated maternal effects, it is essential to study both fitness consequences and physiological mechanisms and constraints from the perspective of all family members.
SPERM COMPETITION GAMES: A GENERAL MODEL FOR PRECOPULATORY MALE–MALE COMPETITION
TLDR
A general model of sperm allocation is developed that allows us to examine the effect of all forms of precopulatory competition on sperm allocation patterns and predicts that sperm allocation decreases if either the “mate‐competition loading,”a, or the number of males competing for each mating, M, increases.
The evolutionary outcome of sexual conflict
  • C. M. Lessells
  • Psychology, Biology
    Philosophical Transactions of the Royal Society B…
  • 28 February 2006
TLDR
Comparing two groups of traits—those related to parental investment and to mating—over which there is sexual conflict, but which have to date been explored by largely separate research traditions suggests that sexual conflict over PI, particularly over PI per offspring, leads less frequently to the evolution of manipulative behaviour, and rarely to the emergence of harmful behaviour.
Parentally biased favouritism: why should parents specialize in caring for different offspring?
  • C. M. Lessells
  • Psychology
    Philosophical transactions of the Royal Society…
  • 29 March 2002
TLDR
This paper uses mathematical models to investigate which ideas can, in theory, explain parentally biased favouritism, and which can be explained by parent-offspring conflict or sexual conflict.
The costs of egg production and incubation in great tits (Parus major)
TLDR
This is the first time that the costs of egg production and incubation have been estimated using such a complete fitness measure, including, as this measure does, the local survival to the following year of both the female and her offspring.
Female blue tits adjust parental effort to manipulated male UV attractiveness
TLDR
It is concluded that blue tit females use male UV coloration as an indicator of expected offspring fitness and adjust their investment accordingly, while males reduce parental feeding rates and this reduces the skeletal growth of offspring.
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