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.