324 
GENERAL INDEX 
Page 
herring, Atlantic - 243 
Pacific 227-320 
age, determination of . 280 
biology 242-291 
condition, seasonal 284-289 
depletion ...1 315 
fishery, description of 230 
gill net 232 
history of 234 
seine 230 
growth rate 282 
head lengths - 267 
localization 233 
mature, occurrence of 244 
size of 245 
range 244 
rays 262-267 
anal 264 
dorsal 262 
spawning 272-280 
statistics 303-315 
analysis of fluctuations. 305 
treatment of 305 
vertebrae, counts of.. 248-262 
comparisons of 248-258 
differences of 258-262 
reliability of 248 
year classes, dominant 294-303 
effect of 299 
occurrence of 298 
relationship of areas - 301 
young, occurrence of 244 
size of — 244 
toothed 162, 163 
Hexagenia bilineata — 199 
Hildebrand, Samuel F.: Review of experiments on artifi- 
cial culture of diamond-back terrapin 25-70 
Hiodon alosoides 162 
tergisus 163 
hog sucker 186 
Hoosier cat 179 
horned dace 201 
horny-head minnow 201 
humilis, Lepomis 203 
Hybognathus nuchalis 201 
Hybopsis hyostomus 202 
kentuckiensis 202 
storerianus 202 
hyostomus, Hybopsis 202 
Hypentelium nigricans 186 
Iehthyomyzon concolor — 214 
Ictalurus anguilla 177 
furcatus 174 
punctatus 175 
Ictiobus : 187 
cyprinella 188 
bubalus 188 
urus — 188 
incisor, Lepomis , 202 
inconstans, Eucalia 214 
interrupta, Morone.. 206 
jack salmon 206 
jejunus, Notropis 200 
Jonny darter 206 
Keokuk Dam 87-139 
description of 92 
destruction of fish 109 
diversion of fish 107 
effect on river 112 
Keokuk Dam— Continued. Page 
injury of fish 109 
locks 95 
fish capture, effect on 101 
fish movement, effect on 99 
fish passage, effect on 99 
obstruction of fish 91 
powerhouse... 96 
Keokuk, Lake (see Lake Keokuk) 115 
kentuckiensis, Hybopsis 202 
king salmon 9 
Labidesthes sicculus 214 
Lake Keokuk 115 
area 116 
commercial fisheries 127 
creation of 115 
current in 118 
depth of 116 
fish fauna of, changes in 133 
fish food in 121 
abundance 126 
plankton 118 
spawning grounds 125 
temperature of 117 
turbidity of 117 
lake lawyer 160 
Lake Pepin 127 
fisheries, commercial.. 127 
fish fauna, changes in 133 
lake sturgeon 150 
Lampsilis anodontides 156 
largemouth black bass 203 
largemouth buffalofish 187 
lawyer 214 
lake 160 
Lepisosteidse 155-160 
Lepisosteus osseus 157 
platostomus 158 
Lepomis cyanellus 203 
humilis 203 
incisor 202 
Leptops olivaris 179 
long-nosed gar 157 
Lota maculosa 214 
lucius, Esox 214 
lutrensis, Notropis 201 
maculosa, Lota 214 
Malaelemmys, centrata centrata 27 
centrata concentrata 27 
pileata littoralis 27 
pileata maerospilota 27 
pileatapileata 27 
melanops, Minytrema 186 
Micropterus dolomieu 203 
salmoides 202 
Minnows: 
blackhead 201 
blunt nose.. 201 
bullhead 201 
chub, river 202 
Storer’s 202 
golden shiner 201 
horned dace 201 
horny-head 202 
redfin 201 
river chub 202 
silvery minnow. 201 
stone roller 201 
Storer’s chub 202 
straw-colored 201 
sucker-mouthed 202 
