Predator Avoidance Hypothesis of Sleep
This evolutionary hypothesis proposes that sleep is an adaptive behavior for protection against predators. The theory suggests that sleep patterns evolved to keep organisms inactive and concealed during times of increased vulnerability, such as in darkness, thereby reducing the risk of harm. However, the evidence for this is complex and inconclusive, as comparative research has not found a clear, consistent relationship between a species' predation risk and its sleep duration.
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Ch.4 States of Consciousness - Psychology @ OpenStax
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OpenStax Psychology (2nd ed.) Textbook
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Energy Conservation Hypothesis of Sleep
Predator Avoidance Hypothesis of Sleep
Species-Specific Sleep Patterns as Evolutionary Adaptations
A species of small, diurnal rodent lives in an environment with many nocturnal predators. This rodent spends most of the night sleeping in a deep, hidden burrow. From the perspective of sleep as an adaptive function, what is the most compelling explanation for this behavior?
A species of small mammal lives in an environment with numerous daytime predators and scarce food resources. This animal spends most of the daylight hours inactive and asleep in a hidden burrow, becoming active to forage for food only during the night. From an evolutionary perspective, what is the most likely primary adaptive advantage of this specific sleep-wake cycle?
Niche adaptation
Body restoration
Energy Conservation Hypothesis of Sleep
Predator Avoidance Hypothesis of Sleep
Memory Consolidation During Sleep
Analyzing the Consequences of Sleep Deprivation
Learn After
The predator avoidance hypothesis suggests that sleep is an adaptive behavior to remain inactive and hidden from predators. However, research shows that some animals facing high predation risk, like the little brown bat, sleep for very long periods (up to 20 hours a day), while others in similar high-risk environments, like the giraffe, sleep for very short periods (less than 2 hours a day). Which statement provides the best analysis of this conflicting evidence?
A comparative study of various mammal species reveals that animals with a high risk of being hunted do not consistently sleep less than animals with a low risk of being hunted. What is the most significant implication of this finding for the theory that sleep evolved primarily as a protective strategy against danger?