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Lecture 3

BIO318 Lecture 3 (Sept 16).docx

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Department
Biology
Course
BIO318Y5
Professor
Sanja Hinic- Frlog
Semester
Winter

Description
BIO318 Lecture 3 - Migration paths of purple martins o Why do they migrate?  No food in the north  Freeze to death  Mating problems? • They actually mate in the north during the spring when there’s also a boom of insects being hatched  Daylight was getting shorter or temperature was dropping • Proximate and ultimate hypothesis  Ultimate: How flying south can be related to fitness  Proximate: referring to the mechanisms such as day length, temperature or other mechanisms the bird respond to o Ultimate and proximate hypotheses are on different levels and should not be argued against as it could be both right - Animal behaviour on ultimate and proximate questions o Proximate and ultimate hypotheses are not alternatives o Function and evolution are related to ultimate questions o Development and causation are rel
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