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Evolution Of Tigers

"Panthera Tigris"

Characteristics

Environment

Natural Selection

Sexual Selection

Ancestors

Divergent Evolution

Bengal Tiger

Genetic Drift

  • Live in South Asia
  • Grasslands and savannas
  • Light colored
  • Short fur

Artificial Selection

Convergent Evolution

  • Female leaves scent trail
  • Attracts male
  • Courting rituals

1. More Stripes

  • More stripes to better blend in when stalking prey
  • Stripe patten
  • Large padded paws
  • Claws
  • Whiskers
  • Large, sharp teeth
  • Long Tail
  • Long hind legs
  • Tropical Rainforests
  • Evergreen Forests
  • Tall Grasslands
  • Mangrove Swamps
  • Savannas
  • Temperate Forests
  • Snow
  • occurred through bottle neck effect
  • poaching lowered population

Tigers selected in favor of must of had:

  • More stripes
  • Longer claws and hind legs
  • More flexible spine
  • Longer tails
  • Zebra's and Tigers developed stripes
  • different pressures led to same result
  • White tigers
  • haven't been seen in the wild since the 1950's
  • some live in captivity

2. Longer Claws and Hind Legs

  • Longer claws can dig further into prey
  • Longer hind legs allows for more jumping distance

Miacids

Locations

  • Lived 50 million years ago
  • 15 million years after the mass extinction of dinosaurs
  • Carnivorous

Pseudaelurus

  • Lived 23.5 million years ago
  • very similar to Proailurus
  • slightly larger
  • had 8 more teeth than cats today

3. More Flexible Spine

  • Flexibility in spine allows for faster running
  • more efficient hunting

4. Longer Tails

  • Balance
  • Momentum
  • Communication
  • Flexible spine

Subspecies

Flehmen Reaction

Courting Ritual

  • male roars and moans
  • if female responds, mating takes place
  • do a dance of smelling, purring and rubbing

South China Tiger

  • Live in South China
  • Evergreen Forests
  • Dark colored coat
  • Short fur

Bengal

South China

Proailurus

  • First known cat
  • lived about 36.5 million years ago
  • small
  • weighed twenty pounds
  • short legs, long body
  • retractable claws

Amur

Sumatran

Malayan

Indochinese

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