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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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http://www.turbosquid.com/FullPreview/Index.cfm/ID/238272
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Chew an M&M and feel how your jaw moves.
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
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
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
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
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
are needed to see this picture.
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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http://www.turbosquid.com/FullPreview/Index.cfm/ID/265158
Why do different animals have different shaped mouths?
Because of what they eat
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
QuickTime™ and aTIFF (Uncompressed) decompressor
are needed to see this picture.
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?
