151] 



ILLINOIS BIOLOGICAL MONOGRAPHS 



151 



River Systems 12 



Roccus chrysops 56 



Rudd, European 51 



Salmo fario 29 



irideus 28 



sebago 28 



Salmon, California 28 



Chinook 28 



Land-locked 28 



Salmonidae 26 



Salvelinus fontinalis 29 



Scardinius erythropthalmus 51 



Schilbeodes exilis 42 



gyrinus 42 



miurus 42 



Sciaenidae 57 



Sculpin 57 



Semotilus alromaculatus. 36 



Serranidae 56 



Sheepshead 57 



Shiner 39 



Common 39 



Golden 37 



Silversides, Brook 45 



Adult 91 



Breeding Habits 64 



Description 62 



Development 66 



Enemies 84 



Food 82 



Summary 92 



Young 67 



Growth of 71 



Migration 73 



Siluridae 40 



Stickleback, Brook 45 



Stizostedion canadense griseum 52 



mtreum 51 



Stone-roller 32, 34 



Sucker, Chub 31 



Common 32 



Hog-nosed 32 



Sunfish 48 



Blue-spotted 47 



Green 47 



McKay's 48 



Orange-spotted 48 



Top-water 45 



Trout, Brook 29 



Brown 29 



German 29 



Great Lake 29 



Rainbow 28 



Umbra limi 42 



Umbridae 42 



Whitefish 26 



