1. Reproduction in: Amphibians Reptiles Turtles Snakes lizards
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Reproduction in:
Amphibians
Reptiles
Turtles
Snakes
lizards
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2. Amphibians and Reptiles
1. Most frogs and toads mate in the water with eggs being fertilized and released to attach to vegetation.
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3.                                                                                
FROG MATING
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4. Anurans = mating season for amphibians Rainfall can induce mating.
Amphibians reproduce sexually
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5. Eggs hatch into tadpoles that breathe through external gills which go through metamorphosis to become a land dwelling adult.
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6. Salamander Eggs are unpigmented
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7. Turtles mating
                              
Males get aggressive, they lock their feet in the rear of her shell, flip over and will mate for a couple of hours. She will sometimes drag him around.
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8. Turtles are oviparous.
a. They lay eggs and deposit them in a nest cavity in the soil for them to hatch later.
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9. Turtles usually lay eggs in warmer months
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10. b. Incubation time varies from 30 days for soft-shelled turtles to 18 months for land tortoises (average is 60 – 90 days, depending on soil temperature).
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12. Snakes may lay eggs from 30 – 85 days after mating.
a. Eggs incubate for 40 – 90 days before hatching.
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13. b. Ovoviviparous snakes retain eggs in their body until they are hatched in 90 – 150 days.
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14. Egg Laying Snakes All pythons Kingsnakes Milksnakes Rat snakes
Corn snakes
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17. A group of eggs that will hatch together
CLUTCH
A group of eggs that will hatch together
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18. Female pythons and King Cobras are 2 of only a few groups of reptiles to care for her eggs after oviposition.
A female will coil around her eggs until they hatch, protecting the eggs and providing temperature regulation, as well.
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19. c. Some snakes are live-bearing snakes with baby snakes receiving nourishment during development from mother
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20. Live birth of snake
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21. MOST SNAKE SPECIES THAT LIVE IN COLDER AREAS ARE LIVE BEARING
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22. Live bearing snakes All boas All vipers Garter snakes
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23. Most snakes mate once a year
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24. Hemipenes of male snake
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25. Snakes mating. It may take him days to get her attention.
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26. Lizards
MOST are egg layers.
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27. Egg Layers Iguanas Water dragons Geckos Veiled chameleons
Panther chameleons
Monitors
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28. Livebearers Solomon Island skink Blue-tongue skink
Shingle-backed skink
Jackson's chameleon
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29. a. Smaller sizes hatch in 30 days or less (anoles, geckos)
b. Large sizes take as long as 120 days (monitor lizard)
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30. Crocodilians lay hard-shelled eggs and deposit in soil nest for air incubation of about 90 days.
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31. All crocodilians guard their nests.
Crocodilians also assist the hatchlings as they emerge from their nests, and will guard them for a while after hatching.
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34. Did you know that the sex of a crocodile is determined by the temperature of the eggs during incubation?
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35. Lizards reach sexual maturity based on size, more than chronological age. Small lizards may become reproductively active at 1-2 years of age, while larger lizards may be 3-4 years old
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36. Males have 2 copulatory organs called hemipenes, one on each side of the base of the tail.  Either one of the two hemipenes may be used for internal fertilization.
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37. Urination does not occur through the hemipenes.
The tissue is not erectile either.
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40. Female lizards have paired ovaries and oviducts. Ovaries vary in size.
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41. The oviducts possess both an albumin-secreting function and a shell-secreting function. There is no true uterus. The oviducts connect to and open directly into the cloaca through papillae.
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42. GRAVID= fertilized female lizard
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