Reptile Reptile Reproduction & Reproduction &
DiseasesDiseasesBy Mr. “It’s a boy” ChapmanBy Mr. “It’s a boy” Chapman
Reproduction MethodsReproduction Methods
OviparousOviparous – egg layers – egg layers
ViviparousViviparous – live birth – live birth
OvoviviparousOvoviviparous – eggs stay inside of – eggs stay inside of mother until they are ready to hatch, mother until they are ready to hatch, then the eggs hatch inside of the then the eggs hatch inside of the mother and babies come out like live mother and babies come out like live birth.birth.
TurtlesTurtles
Turtles are oviparous (lay eggs that Turtles are oviparous (lay eggs that hatch later)hatch later)
Female turtles lay eggs in a nest that Female turtles lay eggs in a nest that they dig (usually in the soil or sand).they dig (usually in the soil or sand).
The females leave after laying eggs, The females leave after laying eggs, no parental careno parental care
Turtle EggsTurtle Eggs
Eggs vary in size and Eggs vary in size and amount.amount.
Turtles EggsTurtles Eggs:: - Avg. 50 eggs- Avg. 50 eggs - soft and hard shells- soft and hard shells - avg. 60 day - avg. 60 day
incubationincubation Soft shell 30 daySoft shell 30 day Hard shell 18 monthsHard shell 18 months
Turtle MatingTurtle Mating
Males plastron are usually concaved, Males plastron are usually concaved, so the male can climb on the back of so the male can climb on the back of the female.the female.
Males uses his claws on the front Males uses his claws on the front limbs to grasp the front edge of the limbs to grasp the front edge of the females carapace.females carapace.
SnakesSnakes
Snakes may be oviparous, Snakes may be oviparous, ovoviviparous, or viviparous.ovoviviparous, or viviparous.
Most snakes are oviparousMost snakes are oviparousSnakes lay there eggs under rocks, Snakes lay there eggs under rocks,
hollow logs, in the ground, or hollow logs, in the ground, or anywhere warm.anywhere warm.
Snakes also do not provide parental Snakes also do not provide parental care.care.
MatingMating The male and The male and
female will wrap female will wrap around each other around each other until their cloacae until their cloacae are together.are together.
Females may hold Females may hold the sperm for the sperm for months until they months until they fertilize the egg.fertilize the egg.
IncubationIncubationThe temperature of the environment The temperature of the environment
controls how fast the babies develop.controls how fast the babies develop.Egg layersEgg layers::- 30-50 days after mating- 30-50 days after mating- lay 5 to 60 eggs- lay 5 to 60 eggsLive bearingLive bearing::- 90 to 150 days- 90 to 150 days- 10 to 100 babies- 10 to 100 babies
Snakes BabiesSnakes Babies
Snakes get out of Snakes get out of their eggs using a their eggs using a tooth on their tooth on their snout to slice the snout to slice the egg open called?egg open called?
Egg ToothEgg Tooth
LizardsLizards
Lizards are also OV, OVOV, and VIVI, Lizards are also OV, OVOV, and VIVI, but most are OV.but most are OV.
Lizards lay eggs in holes dug in the Lizards lay eggs in holes dug in the soil.soil.
DimorphismDimorphism – –Definite difference you can see Definite difference you can see
between the male and females.between the male and females.
MatingMating
Males attract females by displaying Males attract females by displaying bright body colors, engage in bright body colors, engage in bobbing or body movements to bobbing or body movements to attract the female.attract the female.
Once accepted by a female the male Once accepted by a female the male will grasp and bite the female’s neck will grasp and bite the female’s neck to hold her down.to hold her down.
Females may hold or store sperm for Females may hold or store sperm for long periods before fertilization.long periods before fertilization.
Lizard IncubationLizard Incubation
Small lizardsSmall lizards (geckos and anoles): (geckos and anoles): - 30 days- 30 days - lay 1-2 eggs- lay 1-2 eggs
Large LizardsLarge Lizards (monitors) (monitors) - 120 days- 120 days - 50 eggs- 50 eggs
Lizards also have an egg toothLizards also have an egg tooth
CrocodiliansCrocodilians
Crocodilians are only oviparousCrocodilians are only oviparousCrocodilians court females like Crocodilians court females like
lizards, but they mate in the water.lizards, but they mate in the water.
Females build nest out of water Females build nest out of water
Eggs are laid in nest and then Eggs are laid in nest and then covered up by the mother.covered up by the mother.
Parental CareParental Care Female show Female show
amazing parental amazing parental care.care.
The female will not The female will not eat during this eat during this time.time.
IncubationIncubation
All crocodilians lay All crocodilians lay hard shell eggshard shell eggs
AlligatorsAlligators:: - lay 20-30 eggs- lay 20-30 eggs CrocsCrocs:: - lay 60-100 eggs- lay 60-100 eggs GharialsGharials:: - lay 40 eggs- lay 40 eggs
The amount of The amount of eggs laid depends eggs laid depends on the age and size on the age and size of the female.of the female.