How Do
Dolphins

Sleep?
www.dolphins-world.com
All
mammals
sleep

and dolphins are
no exception.
Dolphin’s brains, like ours, are divided into two hemispheres.

www.dolphins-world.com
Howeverdolphins sleep
While one brain hemisphere sleeps the other
maintains breathing duties, motor behaviors and
possibly...
When dolphins are in sleep mode

they often lay motionlessly at the water surface or at the bottom of
a pool, or they migh...
Researchers

theorize that some animals have developed this ability to help them detect
approaching predators or to period...
In captivity

dolphins seemingly enter a fully asleep
state where both eyes are closed.

In this case

respiration is auto...
Anesthetized dolphins

initially show a tail kick reflex

but it is not known if dolphins in the wild

reach this state.

E...
Scientists in California and Russia have discovered that dolphins,
including the killer whale mothers and calves do not sl...
Jerome Siegel,

a neurobiology researcher,

says the sleep patterns he and his colleagues observed in the babies are "just...
The Bottlenose Dolphin- by Stephen Leatherwood, Randall R. Reeve
The Dolphin in the Mirror: Exploring Dolphin Minds and Sa...
FIND US...
WWW.DOLPHINS-WORLD.COM
FACEBOOK.COM/BIOEXPEDITION
TWITTER.COM/BIOEXPEDITION
YOUTUBE.COM/BIOEXPEDITION
PINTEREST...
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How Do Dolphins Sleep?

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All mammals sleep, and dolphins are no exception. How do they do?

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How Do Dolphins Sleep?

  1. 1. How Do Dolphins Sleep? www.dolphins-world.com
  2. 2. All mammals sleep and dolphins are no exception.
  3. 3. Dolphin’s brains, like ours, are divided into two hemispheres. www.dolphins-world.com
  4. 4. Howeverdolphins sleep While one brain hemisphere sleeps the other maintains breathing duties, motor behaviors and possibly also some vigilance against predators. www.dolphins-world.com different than us.
  5. 5. When dolphins are in sleep mode they often lay motionlessly at the water surface or at the bottom of a pool, or they might swim slowly, sometimes with one eye closed, surfacing from time to time to breathe. Dolphins appear to sleep or rest many times throughout the day and night. www.dolphins-world.com
  6. 6. Researchers theorize that some animals have developed this ability to help them detect approaching predators or to periodically rise to the surface to breathe and monitor wave patterns, which keeps them from drowning. www.dolphins-world.com
  7. 7. In captivity dolphins seemingly enter a fully asleep state where both eyes are closed. In this case respiration is automatic; a tail kick reflex keeps the blowhole above the water if necessary. www.dolphins-world.com
  8. 8. Anesthetized dolphins initially show a tail kick reflex but it is not known if dolphins in the wild reach this state. Extensive research found new facts about how the brain of bottlenose dolphins works. www.dolphins-world.com
  9. 9. Scientists in California and Russia have discovered that dolphins, including the killer whale mothers and calves do not sleep during the first few months of the new baby's life. Calf dolphins www.dolphins-world.com
  10. 10. Jerome Siegel, a neurobiology researcher, says the sleep patterns he and his colleagues observed in the babies are "just the reverse" of all other mammals, which normally sleep the most after birth and gradually taper down to adult levels as they age. "This is a challenge for the idea that sleep is necessary for brain and body growth". www.dolphins-world.com
  11. 11. The Bottlenose Dolphin- by Stephen Leatherwood, Randall R. Reeve The Dolphin in the Mirror: Exploring Dolphin Minds and Saving Dolphin Lives - By Diana Reiss. Baby Dolphins Don't Sleep. UCLA Brain Research Institute. October 22, 2012. American Psychological Association. Monitoring animal sleep. Wikipedia Information www.dolphins-world.com
  12. 12. FIND US... WWW.DOLPHINS-WORLD.COM FACEBOOK.COM/BIOEXPEDITION TWITTER.COM/BIOEXPEDITION YOUTUBE.COM/BIOEXPEDITION PINTEREST.COM/BIOEXPEDITION BIOEXPEDITION.COM/ COPYRIGHT © 2013

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