Animal Reproduction PP Part 2

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Slide 1

Marsupials

Babies are born alive but not fully developed.

The baby crawls into the pouch to drink milk and grow until more developed.

Slide 2

Marsupials

Slide 3

Monotremes

AKA…FREAKS OF NATURE!!!

Slide 4

Monotremes

1) Lay Eggs

2) Eggs hatch and young drink milk that comes out of pores…

3) Young are raised by the mother

Slide 5

Monotremes

What is a baby echidna called?

Slide 6

Porcupines

Um, how exactly do porcupines reproduce?

It seems a little dangerous…

Slide 7

Porcupines

Female porcupines (porcupettes) are only fertile 8-12 hours a YEAR!

Males will fight over females and get stuck with quills. If you see a pile of quills in the woods, it’s probably from a porcupine fight.

If she likes the male, she will flip up her tail where there are no quills and he can mate with her (very carefully).

Slide 8

Porcupine facts

The don’t shoot out quills, but they do have 30,000 of them and they grow back in about a month.

Porcupines are the 3rd largest rodent in the world.

They LOVE salt. They will chew on anything that has the slightest amount of salt on it, like the wheelbarrow handle you were touching.

Slide 9

Population control

Use the table on the next slide to calculate the number of babies one female will produce in the assigned number of years.

Mouse- 1 year

Dog/Cat- 3 years

Horse- 4 years

Elephant- 30 years

Tiger- 9 years

Tick- 2 years

Slide 10

How many babies?

Slide 11

Population control

What natural factors help control animal populations?

Food sources

Space/habitat

Predators/ Competitors

Hunting

Relocating

Birth Control

What are some artificial factors?

Slide 12

Population control

Questions:

What does limiting factor mean?

What are some factors that influence a population?