General Classification
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General Classification Soft-rayed fish Dorsal fin is without hard spines Usually have only 1 dorsal fin Adipose fin: small, fatty fin near caudal fin Ex. Trout
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General Classification. Soft-rayed fish Dorsal fin is without hard spines Usually have only 1 dorsal fin Adipose fin: small, fatty fin near caudal fin Ex. Trout. General Classification. Spiny-rayed fish Hard, sometimes sharp spines in dorsal fin Ex. Yellow Perch. - PowerPoint PPT Presentation
Transcript of General Classification
General Classification Soft-rayed fish Dorsal fin is without hard spines Usually have only 1 dorsal fin Adipose fin: small, fatty fin near caudal fin Ex. Trout
General Classification Spiny-rayed fish Hard, sometimes sharp spines in dorsal fin Ex. Yellow Perch
Pennsylvania Fish Species 160 Native to PA Study of fish biology:
Ichthyology
General Characteristics
Ectothermic: temperature of surroundings affects internal temperature and functions
What ONE factor determines which species can survive in a certain body of water?
TEMPERATURE!!!!!
3 Main Temperature Groups:Cold water-< 70 degrees F
(TROUT)Cool water-- > 60 <80 degrees F
(Walleye, Muskellunge)Warm water-- > 80 degrees F(Channel Catfish, Largemouth Bass)
General Characteristics Water temperature and dissolved
oxygen are related Higher water temperature, Lower DO Lower water temperature, Higher DO
Channel Catfish
Channel Cat
Northern Hogsucker
Northern Hogsucker
Muskellunge
MUSKIE
Brook Trout
Brook Trout
Brown Trout
Brown Trout
Rainbow Trout
Rainbow Trout
Pumpkinseed Sunfish
Pumpkinseed
Bluegill
Bluegill
Jeff Ziegler’s $5,000 Blue Gill
1 out of 38 fish released in Lake Arthur!!!!
Black Crappie
Crappie
Largemouth Bass
Largemouth Bass
Yellow Perch
Yellow Perch
PaddlefishFeeding Video
Paddlefish
Walleye
Walleye
Striped Bass (Temperate Bass Family)
Striped Bass
Carp
Carp
Spillway Linesville
Carp Spillway
Creek Chub
Creek Chub
Bluntnose Minnow
Bluntnose Minnow
American Eel
American Eel
Fish Adaptations: Scales Hard, sometimes colorful, overlapping
plates Provides protection from predators and
disease/ infection
4 Types of Scales 1. Placoid: rectangular base, under the
skin, spines project to the surface of the skin
New scales are added, do not grow with the fish
Examples: sharks, skates, rays
Shark: Placoid Scales
Skate: Placoid Scales
Ray: Placoid Scales
4 Types of Scales 2. Ganoid: rhombus shape, connected by
peg and socket joints Do not grow with fish, new ones are added Examples: Gar, Paddlefish, Sturgeon
Longnose Gar: Ganoid Scales
Garpike
Sturgeon: Ganoid Scales
Paddlefish: Ganoid Scales
4 Types of Scales 3. Ctenoid: overlapping, allow great
maneuverability as fish bends Grows with fish, found in spiny rayed fish
Ctenoid Scales
4 Types of Scales 4. Cycloid: same as ctenoid functions Smooth margin, soft-rayed fish Grows with fish
Cycloid Scales: Catfish
REVIEWComplete back of note sheetGive different fish examples for
the top 2
2 minutes!!!! GO!!!
