Effect of Light on Animals

What kind of behaviour can light trigger in animals?

Rhymical
Many animals are seasonal breeders. What does this do to the activity of their reproductive organs?

They become active at certain times of the year
Animals who have lots of babies tend to be long-day / short-day breeders?

Long-day
Give an example of a long-day breeder
- Rabbits
- Birds
Animals with a longer-gestation (pregnancy) eg red deer have a short-day breeding cycle. Mating occurs in autumn, triggered by the _______ photoperoids and young are born in the summer?

decreasing
What is the biological significance of light triggering mating behavious in animals?
- Several months of plentiful food and mild temperatures
- Offspring grow and become strong before winter
Day length also triggers behaviour such as...?
- Hibernation
- Migration
What is biological significance of light triggering hibernation / migration in animals?

The animal can survive winter when conditions in Britain would be severe and food is scarce

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Card Set

Effect of Light on Animals

Description

Higher Biology - Unit Three - Effect of Light on Animals

Updated

2012-04-14T09:14:52Z

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