By N B Davies; J R Krebs; Stuart A West
Typical choice, ecology and behavior -- trying out hypotheses in behavioural ecology -- monetary 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 family members conflicts -- Mating platforms -- intercourse allocation -- Social behaviours: altruism to spite -- Cooperation -- Altruism and clash within the social bugs -- verbal exchange and signs -- end
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Extra resources for An introduction to behavioural ecology
Are all monogamous, eat fruit and hold territories. Consequently, every time you add a new species of gibbon to a comparative study, you increase the extent to which these traits are correlated across species. g. gibbons are fruit eating specialists, but it is something else that they all do that favours monogamy). Phylogenies To solve the problem of species non-independence, it is necessary to take phylogenies into account. A phylogeny is a tree which shows the evolutionary relationships among species (Fig.
In a declining population, future offspring are worth more and slopes will be less than −1. The point of intersection of the curves relating the trade-off between current and future reproductive success, with the fitness isocline furthest from the origin, gives the optimal reproductive tactic (indicated by a solid dot). e. 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).
Indd 34 Larger animals need to eat more food and so, in general, we would expect them to have larger home ranges. Therefore, if we want to examine the influence of an ecological variable, such as diet, on home range size, we have to control for body weight as a confounding variable. When home range size is plotted against the total weight of the group that inhabits it, as expected the larger the group weight the larger the home range (Fig. 5). The influence of diet on home range size can be seen when the specialist feeders (insectivores, frugivores) are separated from the leaf eaters (folivores); the specialist feeders have larger home ranges for a given group weight.
An introduction to behavioural ecology by N B Davies; J R Krebs; Stuart A West