Animal Science

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Animal Science

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What is Animal Science?

DEF: the study of the biology of animals that are under the control of mankind (usually domestic animals)

Breeding

Care

Feeding

Management

Products

Processing

Marketing

Behavior

Welfare

Nutrition

Genetics

Biotechnology

Reproduction

Agribusiness

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A Brief History of Animals

4.5

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A Brief History of Animals

What was the first form of life? (as far as we can tell at the moment)

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A Brief History of Animals

The oldest traces of life date back:

3.4 to 3.5 billion years.

Blue-green algae and bacteria.

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Flash forward a few Billion years…

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Vertebrates

DEF: Animals that have a back bone. (vertebrae)

Can you name any animals that don’t have backbones?

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Vertebrates

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Triassic and Jurassic periods 180-135 million years ago

1st there were only dinosaurs, mammal-like reptiles, and sea creatures.

When dinosaurs were most abundant, the first birds and very small mammals were seen.

Archaeopteryx = ancestors of modern birds

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Triassic and Jurassic periods 180-135 million years ago

Why were there birds and very small mammals when dinosaurs were the most large and numerous? Wouldn’t the dinos take up all the space and food?

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Cretaceous period 135 to 70 million years ago

Dinosaurs and marine reptiles reached their period of greatest abundance then…Disappeared.

The reason for their demise is still debated by scientists.

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Coelacanth: (cee-lo-can’t) “A living fossil”

Ancient fish

Were here more than 400 million years ago!

Still around now, but critically endangered