By N B Davies; J R Krebs; Stuart A West
Traditional 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 -- residing 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 -- communique and signs -- end
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Additional info for An introduction to behavioural ecology
6). Sexual dimorphism in tooth size Sexual dimorphism evolves from sexual competition Males often have larger teeth than females. , 1978). 0 Fig. 6 The degree of sexual dimorphism increases with the number of females per male in the breeding group. Each point is a different genus, some of which are indicated by name. From Clutton-Brock and Harvey (1977). 9 Aotus 1 2 3 4 5 6 7 Sex ratio in breeding group (No. indd 36 against predators. Alternatively, males may have larger teeth for competition with other males over access to females.
Com/ Holger Mette. (b) A small group of black and white colobus monkeys, which eat leaves in the forest. com/ Henk Bentlage. (c) A large group of gelada baboons, which feed on the ground on grass leaves and roots. com/ Guenter Guni. (b) (c) ecological variables on each trait. Thirdly, they used different genera as independent data points for analysis, rather than species, to reduce the problem of similarity through common ancestry. Some examples are now discussed to illustrate their approach. indd 34 Larger animals need to eat more food and so, in general, we would expect them to have larger home ranges.
1 1 10 100 1000 2500 Population group weight (kg) Fig. 5 Home range size plotted against the weight of the group that inhabits the home range for different genera of primates. The solid circles are folivores, through which there is a solid regression line. The open circles are specialist feeders (insectivores or frugivores) and the regression line through these points is dashed. Some of the genera are indicated by name. From Clutton-Brock and Harvey (1977). that fruit and insects are more widely dispersed than leaves, so specialist feeders need a larger foraging area in which to find enough food.