Slide 2 Pennsylvania Fish Species 160 Native to PA Study of fish biology: Ichthyology Slide 3 General Classification Spiny-rayed fish Hard, sometimes sharp spines in dorsal fin Ex. Yellow Perch Slide 4 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 Slide 5 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-- > 6080 degrees F Slide 6 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 Slide 7 Channel Catfish Slide 8 Channel Cat Slide 9 Northern Hogsucker Slide 10 Slide 11 Muskellunge Slide 12 MUSKY Slide 13 Brook Trout Slide 14 Slide 15 Brown Trout Slide 16 Brown Trout Slide 17 Rainbow Trout Slide 18 Rainbow Trout Slide 19 Pumpkinseed Sunfish Slide 20 Pumpkinseed Slide 21 Bluegill Slide 22 Bluegill Slide 23 Black Crappie Slide 24 Crappie Slide 25 Largemouth Bass Slide 26 Slide 27 Slide 28 Yellow Perch Slide 29 Slide 30 Walleye Slide 31 Slide 32 Striped Bass ( Temperate Bass Family ) Slide 33 Striped Bass Slide 34 Carp Slide 35 Slide 36 Creek Chub Slide 37 Creek Chub Slide 38 Bluntnose Minnow Slide 39 Slide 40 American Eel Slide 41 American Eel Slide 42 Paddlefish Slide 43 Slide 44 Fish Adaptations: Scales Hard, sometimes colorful, overlapping plates Provides protection from predators and disease/ infection Slide 45 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 Slide 46 Shark: Placoid Scales Slide 47 Skate: Placoid Scales Slide 48 Ray: Placoid Scales Slide 49 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 Slide 50 Longnose Gar: Ganoid Scales Garpike Slide 51 Sturgeon: Ganoid Scales Slide 52 Paddlefish: Ganoid Scales Slide 53 4 Types of Scales 3. Ctenoid: overlapping, allow great maneuverability as fish bends Grows with fish, found in spiny rayed fish Slide 54 Ctenoid Scales Slide 55 4 Types of Scales 4. Cycloid: same as ctenoid functions Smooth margin, soft-rayed fish Grows with fish Slide 56 Cycloid Scales: Catfish Slide 57 REVIEW Compete back of note sheet Give different examples for the top 2 2 minutes!!!! GO!!!