individual development. parent offspring conflict long-lived species (e.g. wandering albatross)...
Post on 19-Dec-2015
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Parent offspring conflict
• Long-lived species (e.g. Wandering albatross)
• Short-lived species (e.g. Black-capped chickadee)
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Allocation of resources to offspring reduced unchanged
When handicapped
Interspecific brood parasitism in the cuckoo (Cuculus canorus)
•may remove one of the host’s eggs•may consume the host’s eggs•may break the host’s eggs•lays eggs in the afternoon•lays eggs in less than 10 second•eggshell pattern similar to host’s
•may remove the host’s eggs•may remove the host’s offspring•matures rapidly•successful in begging
Adult Offspring
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Sexual imprinting in zebra finches
Bengalese finch parents
Zebra finch male
Bengalese finch female Zebra finch female
Sexual imprinting
Acquisition phaseWhen? Till 30-40 days of ageResult: social preference formed
Consolidation phaseWhen? First courting attemptsResult: social preference linked
to sexual behaviour
Sexual imprinting in the whooping crane
Tex, the only female whooping craneat the International Crane Foundationbreeding area in 1982, has beenhand-reared and therefore had im-printed on humans. She rejected themate provided to her, but could beenticed to lay eggs (artificially fertil-ized) by “dancing”with humans. Shepreferred Caucasian men of average size with dark hair.