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Conservation and Ecology of Marine Reptiles MARE 494 Dr. Turner Summer 2007

Conservation and Ecology of Marine Reptiles MARE 494 Dr. Turner Summer 2007. Locomotion. Sea turtles depart functionally & morphologically from other turtles Locomotion & locomotor adaptations most unique characters Large size, hypertrophied phalanges, distinctive locomotion patterns.

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Conservation and Ecology of Marine Reptiles MARE 494 Dr. Turner Summer 2007

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  1. Conservation and Ecology of Marine Reptiles MARE 494 Dr. Turner Summer 2007

  2. Locomotion Sea turtles depart functionally & morphologically from other turtles Locomotion & locomotor adaptations most unique characters Large size, hypertrophied phalanges, distinctive locomotion patterns

  3. Locomotion Due to rigid carapace – all propulsion from limbs Terrestrial & Freshwater turtles alternate limb movements Marine – use both forelimbs simultaneously

  4. Locomotion

  5. Locomotion

  6. Terrestrial Locomotion Most hatchlings crawl by synchronous movement of diagonally opposite limbs As increase in mass – locomotion becomes taxonomically dichotomous

  7. Terrestrial Locomotion Most hatchlings crawl by synchronous movement of diagonally opposite limbs Cheloniid Pattern

  8. Terrestrial Locomotion Most hatchlings crawl by synchronous movement of diagonally opposite limbs DermochelidPattern

  9. Terrestrial Locomotion As increase in mass – locomotion becomes taxonomically dichotomous Loggerhead, hawksbill, & Ridleys retain Cheloniid pattern Green/black & flatback switch to Dermochelid pattern

  10. Aquatic Locomotion Already reviewed marine turtle anatomical adaptations Use life-based mechanisms for producing thrust Flippers serve as wings & paddles

  11. Aquatic Adaptations Modification of pectoral appendage from typical foot to modified flipper

  12. Popular Mechanics Use forelimbs to provide thrust – synchronous flipper sweeps causes body to rock through + & - angles of attack Lift-based mechanisms – apparatus act like wings to generate lift Drag-based locomotion - generate thrust by rowing or paddling

  13. Popular Mechanics Comparison of FW & Marine

  14. Hyper-Hypo “I'm hypoglycemic and hyperactive. I'm a hyper hypo. That's why I wear a helmet.” – Phillip the hyper-hypo Long-distance migrations accomplished during a hyperactive swimming frenzy & post-frenzy period Large portion anaerobic – unable to hold head at surface while swimming in rough conditions

  15. Frenzy!

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