Incl 



ex 



Achlya sp., 201 



Age anci sexual maturity, 96 



Aging fish, 85 



origin of scale method, 5 

 Aggregating, of fishes, 230 

 Aldrich, A. D., 244 

 Aldrin, 148 

 Algae, 



as a basic food, 170 



control of, 172 



dangerous forms of, 171 



nuisance fomis of, 171 



toxic substance from, 171 

 Allen, K. R., 118, 208 

 American Fisheries Society, 



meetings of, 4 

 Anahaena, 171 

 Angler relationships, 



with commercial fishermen at Reelfoot 

 L, 199 

 Angling, public interest in, 251 

 Annuli, 



close spacing of, 87 



false, 87 



overlapping, 87 



skipped, 87 

 Annulus, 



summer ring, 85 



true, false, 85 



winter ring, 85 

 Aphanizomenon, 171 



■fios-aquae, 176 

 Arrowhead Lake (Illinois), 65 

 Artificial fluctuation of water levels, 155 



drawdown to crowd fish, 155 



efiFects on fishes and other vertebrates, 

 159 



effects on invertebrates, 159 



effects on lake bottom, 158 



natural cycle of levels in Illinois River, 

 156-157 



on TVA lakes, 157 

 reflooding after drawdown, 155 

 types of drawdowns, 161 

 Au Sable River (Mich.), 208 



Baccius, G., 



carp-raising techniques, 2 

 Bachman, Dr. John, 



hatchery operation before 1865, 3 

 Balance, 125 



definition of Nicholson, 125 



definition of Swingle, 125 



harvestable-sized fish, 126 



sustained yield requirement of, 126 



untenable as applied to pond fish, 127 

 Ball, R. C, 64, 69, 106, 108, 118, 165 

 Ball, R. C. and Ford, J. R., 106 

 Ball, R. C. and Tait, H. D., 110 

 Barometric pressure, 242 

 Barnes, Clifford (U. of Wash.), 237 

 Barney, R. L., 



aging fish from scales, 5 

 Barney, R. L. and Canfield, H. L., 6, 104 

 Barnickol, P. G. and Campbell, R., 190 

 Bass, alone, 



comparative population size of, 107 



method of stocking of, 107 

 Bass-bluegill combination, 



drawbacks of, 104 



in Illinois, 106 



in North Central States, 104 



in Northern United States and Canada, 

 106 



in Southeast, 104 



not recommended in New York and 

 Montana, 106 



rates of stocking, 105 



stocking with adults, 105 



stocking intermediate-size lakes, 106 



theoretical basis for, 104 



271 



