Natural Selection
Updated: 3/13/2020
Natural Selection
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Storyboard Text

  • Natural Selection of Salamanders
  • Hello! My name is Sal, short for Salvador. I am a brown salamander for The Creek. Coming to you live!
  • Step 1: Overproduction of Offspring
  • We overproduce because not all of our young will survive. Some of them will get eaten by predators or get squished by a rock. Salamanders can lay up to 450 eggs at a time!
  • Step 2: Genetic Variation
  • Salamanders can come in all colors. Some have smooth, brightly colored skin, while others are more spiny and neutral.
  • Most of the salamander population are around six inches long. However, the Japanese giant salamander can grow up to six feet long.
  • Lots of salamanders have glands that produce a poisonous or gross-tasting substance.
  • Step 3: Selection
  • Salamanders' bright colors warn potential predators of their poison. Other animals will leave them alone because they look inedible. Here's Sulfur Sam with the latest on the desert.
  • Step 4: Adaptation
  • Thanks Sal! Salamanders almost universally live near a source of water. However, where I live, there's only water for a limited amount of time every year. During the rainy season I bulk up and find a real cutie to mate with. When the thunder stops rolling, I roll into bed and into my burrow again for the next 9 months. Back to you, Sal.
  • Conclusion
  • This has been The Creek! Thanks for watching, and tune in next time for turtles.
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