PSY395H5 Chapter Notes - Chapter 1: Gamete, Ernest Starling, Combined Oral Contraceptive Pill
Document Summary
Behavioral endocrinology: study of interaction between hormones & behaviour: bi-directional (hormones affect behaviour, behaviour affects hormones) Recognized as a discipline in middle of 20th century (hormones & behaviour, 1948) Testes testosterone sexual behavior, territoriality, hibernation, migration: outside body, in cavity. Castration manipulation of endocrine system: better to eat/easier to control. Eunuchs: castrated males watched over females: before puberty: no effect on behaviour/appearance, after puberty: short, long arms, no sexual behavior, secondary sex characteristics affected (no beards, voice does not develop) Castrati: males castrated so they can perform in opera. Results: substance produced by testes travel through blood and affects behavior: product of testes necessary for cockerel (immature male chicken) to develop into normal adult rooster. Rooster mate with hens, fight, crow, large, distinct plumage. Capons (castrated male chicken; before adulthood tender meat: not the same behavioural/physical characteristics as roosters, no mating, not aggressive, back down, don"t crow. Experiment: 6 cockerels, 3 groups (2 in each group)
