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‘Personality traits’ are behavioural differences between individuals that are stable within individuals. Different combinations of personality traits can correlate with fitness variation but the mechanisms remain unclear. There is the suggestion that personality reflects variation in physiology. For example, ‘fast’ (bold, active, fast exploring) individuals are predicted to maintain a higher metabolic...
To investigate the ecological significance of personality, researchers generally measure behavioural traits in captivity. Whether behaviour in captivity is analogous to behaviour in the wild, however, is seldom tested. We compared individual behaviour between captivity and the wild in blue tits, Cyanistes caeruleus. Over two winters, 125 blue tits were briefly brought into captivity to measure exploratory...
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