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Marine Mammals
Marine mammals ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Other Interesting characteristics ,[object Object],[object Object],[object Object]
Where Do they live? ,[object Object],[object Object],[object Object],[object Object],[object Object]
How Do they survive? ,[object Object],[object Object],[object Object],[object Object]
Three Categories of Marine Mammals ,[object Object],[object Object],[object Object]
Carnivora ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Carnivora ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
Figure 9.09b
California Sea Lion
Harems Stellar Sea Lions in “A” are the largest of the eared seals with males nearly 1 ton! In “B” a harem of California Sea Lions on Santa Barbara Island in S.Cal.  The larger Elephant Seals are in the top of the picture.
“ I am the Walrus”
Sirenia ,[object Object],[object Object]
Sirenia (Sea Cows) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Slow, injured by boats
Figure 9.13
Cetacea ,[object Object],[object Object],[object Object],[object Object]
Cetacea
 
Cetacea ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Cetacea ,[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],Cetacea Suborder  Mysticeti
Figure 9.19b
Cetaceans swim  with strong tail and flukes Key facts (differ between species): average life span: 10 to 50 years  gestation: 10 to 17 months  calving: can occur every 2 to 5 years, one calf at a time  size: "typical" dolphins are about two m long and weigh 100 kg
What Is The Difference Between  A Dolphin And A Porpoise? ,[object Object],[object Object],[object Object],[object Object]
Dolphins ,[object Object],[object Object],[object Object],[object Object]
Porpoises ,[object Object],[object Object],[object Object],[object Object]
 
 
Why are dolphins affected by tuna fisheries? Yellow-fin tuna often school beneath large herds of spotted dolphins in the eastern Pacific Ocean. They both are feeding on surface-dwelling squids, mackerel and flying fish.  When fishing nets are set beneath the dolphins to surround the tuna, dolphins and other by-catch also get tangled in the nets and die.  Public pressure surrounding this controversial issue has prompted a 97 percent reduction of dolphin by-catch in the last seven years. Dolphins are only affected by the yellow-fin tuna fishery. Albacore tuna do not associate with dolphins.
Net tough on dolphins! Since 1990 the 3 top tuna packers agreed to not buy tuna from dolphin killing suppliers This net has now been changed so that dolphins are not harmed by US fisherman.
Drift net tough on dolphins!
Two other fishing style “nets”
The Mermaid Cares Chicken of the Sea ®  implemented "The Mermaid Cares" dolphin-safe policy in April 1990 and is among the industry's leaders in implementing programs to prevent accidental dolphin mortality. All tuna purchased, processed and sold by Chicken of the Sea is dolphin-safe... period! There is no flexibility in our policy. All the suppliers of our raw tuna and all suppliers of finished goods must be 100% dolphin-safe. None of the tuna we purchase is caught in association with dolphins. Our commitment to help solve the dolphin mortality problem has been long-standing, and we at Chicken of the Sea can truly say, "The Mermaid Cares".
Dolphin Echolocation
Blue Whale Anatomy
A dolphin giving “live” birth Viviparous = Live Birth
"Walking Dinosaur" fossil Found in 1994 in Pakistan from around 49 million years ago – It’s a whale of a tale!
Figure 9.31
Table 9.02
Strandings ,[object Object],[object Object],[object Object]
 
Which whales eat only large zooplankton? Which whale eats invertebrates near the ocean floor? Which whale eats large squid? Which whales eat pelagic fishes?
Figure 9.27a Beluga Whale A white Arctic whale  with a conspicuous  melon to focus the  outgoing sound waves.
Whale Behavior Sperm whales surrounding an injured member  of a pod
Whale Behavior Spying Behavior of Killer Whales
Dolphin Behavior Dolphins  seen carrying an injured Dolphin  to the surface to breathe.

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Marine Mammals

  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.  
  • 12. Harems Stellar Sea Lions in “A” are the largest of the eared seals with males nearly 1 ton! In “B” a harem of California Sea Lions on Santa Barbara Island in S.Cal. The larger Elephant Seals are in the top of the picture.
  • 13. “ I am the Walrus”
  • 14.
  • 15.
  • 17.
  • 19.  
  • 20.
  • 21.
  • 22.
  • 24. Cetaceans swim with strong tail and flukes Key facts (differ between species): average life span: 10 to 50 years gestation: 10 to 17 months calving: can occur every 2 to 5 years, one calf at a time size: "typical" dolphins are about two m long and weigh 100 kg
  • 25.
  • 26.
  • 27.
  • 28.  
  • 29.  
  • 30. Why are dolphins affected by tuna fisheries? Yellow-fin tuna often school beneath large herds of spotted dolphins in the eastern Pacific Ocean. They both are feeding on surface-dwelling squids, mackerel and flying fish. When fishing nets are set beneath the dolphins to surround the tuna, dolphins and other by-catch also get tangled in the nets and die. Public pressure surrounding this controversial issue has prompted a 97 percent reduction of dolphin by-catch in the last seven years. Dolphins are only affected by the yellow-fin tuna fishery. Albacore tuna do not associate with dolphins.
  • 31. Net tough on dolphins! Since 1990 the 3 top tuna packers agreed to not buy tuna from dolphin killing suppliers This net has now been changed so that dolphins are not harmed by US fisherman.
  • 32. Drift net tough on dolphins!
  • 33. Two other fishing style “nets”
  • 34. The Mermaid Cares Chicken of the Sea ® implemented "The Mermaid Cares" dolphin-safe policy in April 1990 and is among the industry's leaders in implementing programs to prevent accidental dolphin mortality. All tuna purchased, processed and sold by Chicken of the Sea is dolphin-safe... period! There is no flexibility in our policy. All the suppliers of our raw tuna and all suppliers of finished goods must be 100% dolphin-safe. None of the tuna we purchase is caught in association with dolphins. Our commitment to help solve the dolphin mortality problem has been long-standing, and we at Chicken of the Sea can truly say, "The Mermaid Cares".
  • 37. A dolphin giving “live” birth Viviparous = Live Birth
  • 38. "Walking Dinosaur" fossil Found in 1994 in Pakistan from around 49 million years ago – It’s a whale of a tale!
  • 41.
  • 42.  
  • 43. Which whales eat only large zooplankton? Which whale eats invertebrates near the ocean floor? Which whale eats large squid? Which whales eat pelagic fishes?
  • 44. Figure 9.27a Beluga Whale A white Arctic whale with a conspicuous melon to focus the outgoing sound waves.
  • 45. Whale Behavior Sperm whales surrounding an injured member of a pod
  • 46. Whale Behavior Spying Behavior of Killer Whales
  • 47. Dolphin Behavior Dolphins seen carrying an injured Dolphin to the surface to breathe.