By N B Davies; J R Krebs; Stuart A West
Typical choice, ecology and behavior -- checking out hypotheses in behavioural ecology -- financial judgements and the person -- Predators as opposed to prey: evolutionary hands races -- Competing for assets -- dwelling in teams -- Sexual choice, sperm pageant and sexual clash -- Parental care and relatives conflicts -- Mating platforms -- intercourse allocation -- Social behaviours: altruism to spite -- Cooperation -- Altruism and clash within the social bugs -- conversation and signs -- end
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Extra resources for An introduction to behavioural ecology
Iteroparity, or repeated breeding). When the curve is concave (b), it is best to allocate all resources to current reproduction, even at the expense of own survival (semelparity, or ‘big bang’ suicidal reproduction). If maximal future reproductive success is greater than maximal current reproductive success in case (b), then the optimal tactic is to not breed and save all resources for the future. (b) Expectation of future reproductive success (a) Current reproductive effort Fig. d. 50 full costs free eggs free chicks Treatment Fig.
10). There may be genetic variation in both the elevation of the line (the trait value) and its slope (the way the trait value changes in response to the environment). Recent studies of the earlier breeding of songbirds in response to climate change provide a good example of phenotypic plasticity. They also show how useful it is to study both proximate and ultimate explanations of behaviour together, hand in hand. 11a). The main changes have been from the mid 1970s, since when there has been a marked increase in spring temperatures (Fig.
However, female survival was affected; full costs females had the lowest survival to the next breeding season, while free chicks females survived the best, with free eggs females having intermediate survival. These results, therefore, support the first hypothesis; there is a trade-off between increased reproductive effort and adult survival. When female fitness was calculated, full costs females had lower fitness than control females (who were left to raise the clutch size they initially chose; Fig.
An introduction to behavioural ecology by N B Davies; J R Krebs; Stuart A West