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Gray Whales Adults 40-45 feet long; 40 tons Calves 15 feet long Spyhop Drawing by Morris Grover
Gray Whale Blows Blow released at 200mph Heart-shaped Blow
Blow Holes 2 blow holes 1 blow hole Baleen Whale Toothed Whale
Whale Lice 200,000 on their body
Barnacles Barnacles (200-400lbs) and Barnacle Scar
Feeding Depress tongue Lift Tongue Blonde Baleen
Rostrum and Baleen Baleen and Tongue
Gray Whale Food Items Mysids Krill Amphipods Opportunistic Feeders
Feeding Skimming Bottom Feeding-Left Tail Fluke
Dorsal Fins vs. Dorsal Humps Humpback Dorsal Fins Gray Whale Dorsal Humps
Identify Individuals by Dorsal Hump and Sometimes Tail Fluke
Behaviors Breach Kelping
Spyhop
Friendly Whales Found in San Ignacio Lagoon, Baja Cal. Mexico
What are you looking at?
 
Ecological Interrelationships Between Resident Gray Whales and Mysid Shrimp
What is a summer resident gray whale? ,[object Object],[object Object]
Why do resident gray whales come to Oregon in the summer? ,[object Object],[object Object],[object Object],Porcelain Crab Larvae Mysid Shrimp Amphipod
Feeding Behaviors of Gray Whales Skim Feeding on Crab Larvae Mysid Feeding-notice left fluke is in the air so the whale is on its right side above bottom. Each feeding behavior is unique for the type of prey the gray whale is targeting. Feeding on mysids in a Bullwhip Kelp bed-looks like a shark fin.
Mysid Swarms Seen on Fish Finders   ( Red Band above the Black Bottom)  Swarm 8 foot thick and continuous Sharking- indicative of mysid feeding seen in areas with thick echogram traces of mysids and shallow waters 20-35 feet deep
How do We Know What They Eat? ,[object Object],[object Object],[object Object],Whale Fecal Material A dream come true!
What is in Whale Fecal Material? What is in Whale Fecal Material? Mysid with Telson Statocyst Neomysis  telson to Left Holmesimysis  to right
What are Mysid Shrimp and How are they Different from Krill? ,[object Object],Mysid Krill Brown or transparent, slim, stalked eyes and found in near shore habitats Krill are orange, stocky, eyes not on stalks and found in offshore habitats
Why are Mysids so Important?   ,[object Object],[object Object],[object Object],Females brooding young have a higher lipid value
What have I learned about mysid shrimp? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Mysid Sexes
How do you sample population dynamics information of mysids? Put down plankton net Put down underwater camera Determine density with acrylic cube Use of an acoustic sensor
Determining Density and Nearest Neighbor Distances (NND) Mysids NND can be from ½ body length to 2 body lengths Acrylic Cube
Determining Mysid Thickness with a Fish Finder
What Do We Know About the Life History of Mysids? Female  Holmesimysis  with brood pouch of 32 eggs-Stage 1 Mysids undergo 3 stages while in the brood pouch. To the right is:  Stage  1-the Egg Stage
Mysid Larval Stages, Stage 2 and Stage 3 Female with 19 Stage 2 larva or “ Torpedo stage ”   Late Stage 2, eyes pigmented Stage 3 Molted Larva have eyes on stalks -also called the  “Cookie Monster Stage”
Problems Facing Gray Whales Natural Problems 1. Changes in Prey Biomass ie. El Nino 2. Attacks by Orcas ie. 1/3 Calves killed each year Man-made Problems 1. Boat Hits 2. Entanglement in Fishing Gear 3. Shot or Harpooned 4. Noise Levels ie. Shell Offshore Inc., 190dB problem 5. Toxins ie. Stinky Whales
What Happens to Gray Whales in Years with Poor Mysid Biomass? 2005 was a poor year for mysids and  2006 was an excellent year for mysids 2006 2005
Model Comparing Years of Continual Upwelling and Sporadic Upwelling 2005 and 2010 - weak winds  2003, 2004, 2006, 2007, 2008, 2009 - strong winds
Changes in Prey Biomass Problems with 2005 and 2010 Gray Whales ,[object Object],[object Object],[object Object],[object Object]
Body Condition varies with changes in Biomass Depression in Profile Straight Profile Good Body Condition seen in 2006 Poor Body Condition seen in 2005
They can become undernourished due to lack of food supplies Whales are sensitive to changes in their environment as seen by the scapula protruding
Orca Attacks Transient Orcas kill seals, sea lions and whales Tooth rakes on tail fluke or neck
Orcas Attack Star Star’s fluke in 1999 Star’s fluke in 2006 Evidence of an orca attack with tooth rakes on ventral and dorsal flukes
Orcas Attack mom Matrix Slasher and calf Nifer
Boat Propeller Cuts on Residents Cutter Rambolina Zebra Stripe rdh Zebra Stripe-left dorsal hump Zebra Stripe-rdh Football
Scarback Our most famous resident got hit by a harpoon Hit by exploding harpoon between  1985-1987 Whale lice
Scarback’s Tail Flukes changing with age-she’s turning gray New Discovery
Entanglement in Crab Pot Lines Humpback entangled in crab pot line
They can get lesions over their body due to toxins in the water or a depressed immune system Gray Whales with Toxins
Identification of Individual Gray Whales by Dorsal Hump Region Eagle Eye was born in 1994 to Snake Eyes and is a male  Rare Flukeage Poopage Eagle Eye
White Whales and Dark Whales Chunky Ghost 8-Ball
Spike named for spikey dorsal hump and knuckles Ridgeback named for long ridge-like dorsal hump
Vinnie -A young whale named for the V-shaped dorsal hump and nn on neck
Morisa named for  Morse Code-Dot and Dash
Milky Way  -Scarback’s 2004 calf that returned as a 5-year old
2002 LDH RDH Stretch named for stretch-mark like horizontal lines and stretching/breaching out of the water 2004
Patches named for barnacle patches on body
U-Fish  Notice the U and Fish on each side of the dorsal hump
Dotsee Trio
Am I Dotsee or Trio
Valentine Notice the white heart and smooth dorsal hump-been here since 2003
Comet Notice the long white comet tail in front of the dorsal hump, c on the knuckles and how she blows underwater
Shamrock
Arrow  Notice the white arrow on the left dorsal hump and he’s a lefty
Pointer Notice pointed dorsal hump and killer whale tooth rakes and bite marks
New Discovery-Gray Whale DD Bubble Net Feeding
Dotty Meteor Winky How would you distinguish these individual whales?
Oregon’s Resident Whales Courting   Fluking In Synchrony Courting Behavior, late summer, female on left
.  Olivia P. Dorsi- a very promiscious young female
Oh No it’s two Pink Floyds-only 6 feet long, hot pink and prehensile
Curious Oregon Gray Whales
Resident gray whale Localities Whale Cove Cape Foulweather Boiler Bay Eagle Eye heading towards Depoe Bay
My Zodiac with  my dog and first mate, Kida
Close Encounters of the Whale Kind
Kida and the Whales
Good Bye From Ribbon
Good Bye From Snowflake
Good Bye From Stretch
Good Bye From Wishbone
20 (2.16 0 Mean Number of Juveniles/Female in August (n=75) 33 (1.59 0 Mean Number of Eggs/Female in August (n=67) 21 (1.29 19 (1.58) Mean Number of Juveniles/Female in May (n=85) 25 (4.32 22 (4.34) Mean Number of Eggs/Female in May (n=52)     Mysids 0% 80% Percent of Whales in Poor Condition 90% 19% Percent of Time in Mysid Feeding 95% 20% Percent of Time of Whales in Residency 37 15 Number of Resident Whales 77 38 Days Observing 462 228 Observing Hours     Resident Whales 2006 2005  

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OMSI Science Pub - Gray Whales

  • 1.  
  • 2. Gray Whales Adults 40-45 feet long; 40 tons Calves 15 feet long Spyhop Drawing by Morris Grover
  • 3. Gray Whale Blows Blow released at 200mph Heart-shaped Blow
  • 4. Blow Holes 2 blow holes 1 blow hole Baleen Whale Toothed Whale
  • 5. Whale Lice 200,000 on their body
  • 7. Feeding Depress tongue Lift Tongue Blonde Baleen
  • 8. Rostrum and Baleen Baleen and Tongue
  • 9. Gray Whale Food Items Mysids Krill Amphipods Opportunistic Feeders
  • 10. Feeding Skimming Bottom Feeding-Left Tail Fluke
  • 11. Dorsal Fins vs. Dorsal Humps Humpback Dorsal Fins Gray Whale Dorsal Humps
  • 12. Identify Individuals by Dorsal Hump and Sometimes Tail Fluke
  • 15. Friendly Whales Found in San Ignacio Lagoon, Baja Cal. Mexico
  • 16. What are you looking at?
  • 17.  
  • 18. Ecological Interrelationships Between Resident Gray Whales and Mysid Shrimp
  • 19.
  • 20.
  • 21. Feeding Behaviors of Gray Whales Skim Feeding on Crab Larvae Mysid Feeding-notice left fluke is in the air so the whale is on its right side above bottom. Each feeding behavior is unique for the type of prey the gray whale is targeting. Feeding on mysids in a Bullwhip Kelp bed-looks like a shark fin.
  • 22. Mysid Swarms Seen on Fish Finders ( Red Band above the Black Bottom) Swarm 8 foot thick and continuous Sharking- indicative of mysid feeding seen in areas with thick echogram traces of mysids and shallow waters 20-35 feet deep
  • 23.
  • 24. What is in Whale Fecal Material? What is in Whale Fecal Material? Mysid with Telson Statocyst Neomysis telson to Left Holmesimysis to right
  • 25.
  • 26.
  • 27.
  • 29. How do you sample population dynamics information of mysids? Put down plankton net Put down underwater camera Determine density with acrylic cube Use of an acoustic sensor
  • 30. Determining Density and Nearest Neighbor Distances (NND) Mysids NND can be from ½ body length to 2 body lengths Acrylic Cube
  • 31. Determining Mysid Thickness with a Fish Finder
  • 32. What Do We Know About the Life History of Mysids? Female Holmesimysis with brood pouch of 32 eggs-Stage 1 Mysids undergo 3 stages while in the brood pouch. To the right is: Stage 1-the Egg Stage
  • 33. Mysid Larval Stages, Stage 2 and Stage 3 Female with 19 Stage 2 larva or “ Torpedo stage ” Late Stage 2, eyes pigmented Stage 3 Molted Larva have eyes on stalks -also called the “Cookie Monster Stage”
  • 34. Problems Facing Gray Whales Natural Problems 1. Changes in Prey Biomass ie. El Nino 2. Attacks by Orcas ie. 1/3 Calves killed each year Man-made Problems 1. Boat Hits 2. Entanglement in Fishing Gear 3. Shot or Harpooned 4. Noise Levels ie. Shell Offshore Inc., 190dB problem 5. Toxins ie. Stinky Whales
  • 35. What Happens to Gray Whales in Years with Poor Mysid Biomass? 2005 was a poor year for mysids and 2006 was an excellent year for mysids 2006 2005
  • 36. Model Comparing Years of Continual Upwelling and Sporadic Upwelling 2005 and 2010 - weak winds 2003, 2004, 2006, 2007, 2008, 2009 - strong winds
  • 37.
  • 38. Body Condition varies with changes in Biomass Depression in Profile Straight Profile Good Body Condition seen in 2006 Poor Body Condition seen in 2005
  • 39. They can become undernourished due to lack of food supplies Whales are sensitive to changes in their environment as seen by the scapula protruding
  • 40. Orca Attacks Transient Orcas kill seals, sea lions and whales Tooth rakes on tail fluke or neck
  • 41. Orcas Attack Star Star’s fluke in 1999 Star’s fluke in 2006 Evidence of an orca attack with tooth rakes on ventral and dorsal flukes
  • 42. Orcas Attack mom Matrix Slasher and calf Nifer
  • 43. Boat Propeller Cuts on Residents Cutter Rambolina Zebra Stripe rdh Zebra Stripe-left dorsal hump Zebra Stripe-rdh Football
  • 44. Scarback Our most famous resident got hit by a harpoon Hit by exploding harpoon between 1985-1987 Whale lice
  • 45. Scarback’s Tail Flukes changing with age-she’s turning gray New Discovery
  • 46. Entanglement in Crab Pot Lines Humpback entangled in crab pot line
  • 47. They can get lesions over their body due to toxins in the water or a depressed immune system Gray Whales with Toxins
  • 48. Identification of Individual Gray Whales by Dorsal Hump Region Eagle Eye was born in 1994 to Snake Eyes and is a male Rare Flukeage Poopage Eagle Eye
  • 49. White Whales and Dark Whales Chunky Ghost 8-Ball
  • 50. Spike named for spikey dorsal hump and knuckles Ridgeback named for long ridge-like dorsal hump
  • 51. Vinnie -A young whale named for the V-shaped dorsal hump and nn on neck
  • 52. Morisa named for Morse Code-Dot and Dash
  • 53. Milky Way -Scarback’s 2004 calf that returned as a 5-year old
  • 54. 2002 LDH RDH Stretch named for stretch-mark like horizontal lines and stretching/breaching out of the water 2004
  • 55. Patches named for barnacle patches on body
  • 56. U-Fish Notice the U and Fish on each side of the dorsal hump
  • 58. Am I Dotsee or Trio
  • 59. Valentine Notice the white heart and smooth dorsal hump-been here since 2003
  • 60. Comet Notice the long white comet tail in front of the dorsal hump, c on the knuckles and how she blows underwater
  • 62. Arrow Notice the white arrow on the left dorsal hump and he’s a lefty
  • 63. Pointer Notice pointed dorsal hump and killer whale tooth rakes and bite marks
  • 64. New Discovery-Gray Whale DD Bubble Net Feeding
  • 65. Dotty Meteor Winky How would you distinguish these individual whales?
  • 66. Oregon’s Resident Whales Courting Fluking In Synchrony Courting Behavior, late summer, female on left
  • 67. . Olivia P. Dorsi- a very promiscious young female
  • 68. Oh No it’s two Pink Floyds-only 6 feet long, hot pink and prehensile
  • 70. Resident gray whale Localities Whale Cove Cape Foulweather Boiler Bay Eagle Eye heading towards Depoe Bay
  • 71. My Zodiac with my dog and first mate, Kida
  • 72. Close Encounters of the Whale Kind
  • 73. Kida and the Whales
  • 74. Good Bye From Ribbon
  • 75. Good Bye From Snowflake
  • 76. Good Bye From Stretch
  • 77. Good Bye From Wishbone
  • 78. 20 (2.16 0 Mean Number of Juveniles/Female in August (n=75) 33 (1.59 0 Mean Number of Eggs/Female in August (n=67) 21 (1.29 19 (1.58) Mean Number of Juveniles/Female in May (n=85) 25 (4.32 22 (4.34) Mean Number of Eggs/Female in May (n=52)     Mysids 0% 80% Percent of Whales in Poor Condition 90% 19% Percent of Time in Mysid Feeding 95% 20% Percent of Time of Whales in Residency 37 15 Number of Resident Whales 77 38 Days Observing 462 228 Observing Hours     Resident Whales 2006 2005  

Notes de l'éditeur

  1. WW