Animal Reproduction PP Part 1

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Watching animals, paint, color change strips

Heat detection

Ways to detect heat

Slide 13

Pedometers- ‘foot’-meters

Necklaces measure steps per hour…more activity usually means estrus

Transmits to a computer graphs data

Ways to detect heat

Slide 14

Pedometers at UNH Organic Dairy

Ways to detect heat

Slide 15

Let the bull do it. He can smell exactly when the cow is ready but…

Ways to detect heat

Would you want to be in the field with this guy?

Slide 16

Controlling Reproduction

Which method would you use?

Groups are farms. Each uses a different method.

What are the pros and cons of each method?

Would you use this method? Why or why not?

Which method would you prefer? Why?

Slide 17

Controlling Reproduction

Cost

Watching-$48/day

Paint- $.50 each application per cow

Color Break Strips- $1.55 each

Pedometer set-up-$40-$100 per cow

Bull-cheaper than 1 cow

How much management is needed?

How good does it work? (Efficacy)

Slide 18

Controlling Reproduction

You’ve detected estrus. Now comes the fun part.

Slide 19

Placental Animals

We know how placental mammals work, right?

Slide 20

Non- Placental Animals

Reptiles

Birds

Fish

Marsupials

Monotremes

Slide 21

Reptiles

Have a CLOACA.

a common orifice where feces, urine, and reproductive functions occur

The male fertilizes the eggs inside the female and she lays them to hatch.

The yolk inside the egg provides nutrients like a placenta.

Slide 22

Reptiles

Young are independent upon hatching. No parental care.

Except Crocodiles

Slide 23

Reptiles

Some reptiles keep the eggs inside and give birth to live babies.

Some snakes and lizards do this but they still don’t care for the young.

Slide 24

Birds