660 likes | 813 Views
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.
E N D
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
Jeff Ziegler’s $5,000 Blue Gill 1 out of 38 fish released in Lake Arthur!!!!
Paddlefish Feeding Video