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