Amphibian history notes

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Amphibian history notes

  1. 1. AmphibiansBy Mr. “Frogs are Cool” Chapman
  2. 2. History History indicates that lobe-finned fish were ancestors of amphibians.
  3. 3. History So what would these lobe-finned fish do when the ponds dried up? (think about the lung fish)
  4. 4. History They would use their strong lobe-fins to move to another pond or wet area. Now they can move from pond to pond, and they also have a lung like organ that can take oxygen out of the air.
  5. 5. History
  6. 6. Classification  Kingdom: Animalia  Phylum: Chordata  Class: Amphibia
  7. 7. Amphibian There are about 4,000 species of amphibians. Most living amphibians are in 3 orders.
  8. 8. Orders Gymnophiona: Caecilians  (naked snakes) 170 species only in tropics
  9. 9. Amphibians Gymnophiona: Caecilians  (naked snakes) 170 species only in tropics Caudata: Newts and salamanders  350 species
  10. 10. Amphibians Gymnophiona: Caecilians  (naked snakes) 170 species only in tropics Caudata: Newts and salamanders  350 species Anura: Frogs and Toads  3,500 species
  11. 11. CharacteristicsAmphibians are characterized by....... 1. Naked skin (no scales) 2. Three chambered heart 3. Usually a larval stage that is distinct from the adult stage of development. 4. Cold-blooded 5. Moist skin 6. Semi-Permeable skin through which Semi-P they exchange most of their gases
  12. 12. Amphibians Amphibians also have glands in their skin that produces toxic substances. Some toxics can be deadly to predators and humans.
  13. 13.  This is Zetek’s frog, another highly endangered species. Some have more yellow and orange than this one. Why do some frogs have bright color pattern? Aposomatic Coloration (warning colors).
  14. 14. Amphibians Amphibians have never been able to completely leave the water (or at least moist environments). 1. They must return to the water to breed 2. They have to keep their skin moist.
  15. 15. Tongues Tongues of amphibian vary considerably. Some amphibian have no tongues.  Ex. Caecilians
  16. 16. Tongues Tongues of amphibian vary considerably. Some amphibian have no tongues.  Ex. Caecilians Some amphibians have a very long tongue with sticky tips.  Ex. Most toads
  17. 17. Tongues Tongues of amphibian vary considerably. Some amphibian have no tongues.  Ex. Caecilians Some amphibians have a very long tongue with sticky tips.  Ex. Most toads Amphibian tongues in between
  18. 18. Amphibian Feeding Amphibians catch prey by using?  Their tongue  Mouth
  19. 19. Feeding Amphibians catch prey by using?  Their tongue  Mouth Once in there mouth, amphibians crush their prey with their jaws and swallow it whole. Amphibians do not have teeth
  20. 20. Feeding How do amphibians push the food down their throat? Amphibians use their eyes to push the food down their throat.
  21. 21. What is Food Amphibians will eat; Insects Spiders Fish Other frogs Small mammals Overall, amphibians will eat anything they can fit into their mouth.
  22. 22. Where They Live Amphibians are mostly found? Wetlands, swamps, or in moist areas.
  23. 23. Where They Live Amphibians are mostly found? Wetlands, swamps, or in moist areas. Why do amphibians have to stay moist? If their skin dries up they will die.
  24. 24. Skin Amphibians skin is considered to be semi-permeable. Semi-permeable means liquids and gases can pass through their skin, but not solids. If amphibians are in a dry environment, there is nothing to stop water from moving out of their body.
  25. 25. Skin But what happens when they are in water that has toxic chemicals in it? The toxins get absorbed into their body with the water and they die. Amphibians are considered to be Bio-Indicators
  26. 26. Bio-Indicators Bio-Indicator – is an organism that indicates whether or not an area is healthy. Amphibians are widely used to figure out how healthy wetlands are. Example: If a pond has lots of frogs, you would know the water is clean and free of toxins.
  27. 27. Reproduction Methods Oviparous – egg layers Viviparous – live birth Ovoviviparous – eggs hatch in side mother and the young live in her until maturity.

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