Pennsylvania Fish Species 160 Native to PA Study of fish biology: Ichthyology
General Classification Spiny-rayed fish Hard, sometimes sharp spines in dorsal fin Ex. Yellow Perch
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 Characteristics Ectothermic: temperature of surroundings affects internal temperature and functions Temperature of water is the main determinant of what species you will find in a given body of water 3 main groups: Cold water-< 70 degrees F Cool water-- > 60 <80 degrees F Warm water-- > 80 degrees F
General Characteristics Some of the temperature ranges may overlap Water temperature and dissolved oxygen are related Higher water temperature, Lower DO Lower water temperature, Higher DO
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