How do fish capture their food? John Postlethwait, Bill Cresko, Mark Currey University of Oregon.

How do fish capture their food?

John Postlethwait, Bill Cresko, Mark CurreyUniversity of Oregon

Monday1. Ways that fish catch food.2. Mouth bones.3. Let’s catch some fish.4. Fish mouth bones.

Outline

Tuesday5. Modeling fish feeding.6. What fish did we catch?7. An experiment: Different mouth shapes

Feeding diversity

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Dusky farmerfish

Dusky farmerfish movie

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W. Jim Cooper

Dusky farmerfish.

How does it catch food?

Dusky farmerfish.

How does it catch food?

It rams into its food with an open mouth!

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http://www.akwarium.gdynia.pl/galeria/Rybymorskietropikalne/images/Chromis-viridis.jpg

Blue Green Chromis

Blue green Chromis movie

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W. Jim Cooper

How does it catch food?

Blue green Chromis movie

How does it catch food?

Blue green Chromis movie

It sucks food into its mouth.

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http://i72.photobucket.com/albums/i177/funnyhahalol/MMs/AAAHeaderpic2400.jpg

Eat an M&M like you were a ram-feeding farmerfish

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Eat an M&M like you were a suction-feeding chromis

Bones make the mouth

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What animal is this?

Bones make the mouth

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Chew an M&M and feel how your jaw moves.

Different animals have different shaped mouths.

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Different animals have different shaped mouths.

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http://www.turbosquid.com/FullPreview/Index.cfm/ID/265158

Different animals have different shaped mouths.

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

http://www.turbosquid.com/FullPreview/Index.cfm/ID/265158

QuickTime™ and aTIFF (Uncompressed) decompressor

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http://www.turbosquid.com/FullPreview/Index.cfm/ID/265158

Different animals have different shaped mouths.

QuickTime™ and aTIFF (Uncompressed) decompressor

are needed to see this picture.

http://www.turbosquid.com/FullPreview/Index.cfm/ID/265158

Different animals have different shaped mouths.

QuickTime™ and aTIFF (Uncompressed) decompressor

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http://www.turbosquid.com/FullPreview/Index.cfm/ID/265158

Different animals have different shaped mouths.

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http://www.turbosquid.com/FullPreview/Index.cfm/ID/265158

Why do different animals have different shaped mouths?

Because of what they eat

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Why do different animals have different shaped mouths?

Because of what they eat

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QuickTime™ and aTIFF (Uncompressed) decompressor

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http://www.turbosquid.com/FullPreview/Index.cfm/ID/265158

Why do different animals have different shaped mouths?

Because of what they eat

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Let’s catch some fish and see what their mouths are like.

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WHAT DO THEY EAT IN THE LAKE?

Monday• Ways that fish catch food.• Mouth bones.1. Let’s catch some fish.2. Fish mouth bones.

Outline

Tuesday5. Modeling fish feeding.6. What fish did we catch?7. An experiment: Different mouth shapes

Jaw levers and links

A

B

DE

F

G

C

H

1

7

2

3

5

6

4

Jaw levers and links

A

B

D’

E

F

O

1

2

2

34

3 3 5

5

6

6

4

7

71 G

C

2

4

Jaw lever cut outs

D4

3

D’ is an ecological variant of D. Problem: How does shape of this one bone affect function?

Muscles attach to point 5 and pull to the right to open the mouth.Problem: Where is the best place to place a muscle to close the mouth?