Evolutionary explanations of sleep
- Created by: hannah kingham
- Created on: 07-03-16 09:25
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- Evolutionary Explanations
- This approach focuses on ecological niches
- Ecological niche- the role a species plays in it environment
- Environment- whether they are aquatic or terrestrial and whether they are nocturnal or diurnal
- Predator or prey- e.g. prey animals are often herbivores and are more vulnerable to predators especially when asleep.
- Sleep site- sleep in a burrow or a more exposed location
- Size- large animal tend to sleep less than smaller animals
- Ecological niche- the role a species plays in it environment
- Ecological factors
- Predator
- Meddis (prey status)
- sleep keeps prey animals safe at times when normal activities are impossible
- e.g day dwelling animals cant look for food at night so stay out of harms way by sleeping
- Meddis (prey status)
- Hiberation
- Webb
- use the analogy of hibernation to explain sleep
- animals e.g. bears hibernate to conserve energy at times when hunting is impossible
- Sleep is a time of relative inactivity so animals can use this to conserve energy resources
- important for small animals who tend to have higher metabolic rates so need more sleep to conserve energy
- use the analogy of hibernation to explain sleep
- Webb
- Predator
- This approach focuses on ecological niches
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