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Approach tovthe ptobletn. oss. 225-2 oo ae cea saa ene eae eee ee es 645 
Methodtof investigations: * 2025.2 a = sae a a er ee 2 2 646 
Natural! history of the whitefish’ 2-7 3.3 = eae a Se ee ee ee eS 649 
Sources of information! >=. = 2=- =-—- - 6. =. ea 2 a ee a ee eh ee 649 
Kinds.of whitefish ..~* 3-2 =51-. 82520 sto soe sete a Sen ee eee 650 
Deépths-at- which whitefish coun: 2-2. = eee Re = 650 
Areas of bottom frequented iby. whitefish =— — === =~ ea ee ee 652 
Migrations: > 027 3 50h oe = ee ee eee 653 
Local habits of whitefish 255 23402 = eee ee eae ee a een eee 654 
Whitefish areas of Greatakessoo2 <8 22 re oat ee ead = Soe 2 eae 655 
Effect of propagation upon whitefish production in Great Lakes_______--------------------- 660 
Annual catch and plant in Michigan and Canadian waters__--------------------------- 660 
Discussion of average catch and plant for certain areas_____--------------------------- 666 
Canadian and) Michipan waters of Lake'Superior= 2-25. — 2-2 ee 666 
Canadian and) Michipan waters or ake Muton= = 22-9 Sin ae ee ee 668 
Canndian*waters ofake Brie‘and! Lake'Ontanoss— 9 2 eee) oe ee 669 
Restrietediareds of Lake Michipan — £24 obo oS bck- =e} eee oe eee 671 
Production-compared withantensity of plants22.- 26s. 2. ae oa ae ee 673 
Conclustous/esito effect of prapagation = S2— on ae ea ee a me re ee 673 
Effect of legislative enactment on whitefish production ___--------------------------------- 676 
Syblerarteve afore sll PSO NS i= eee ee Se Ae ee ee ee Se Se ee ee eit ee 68r 
Measures recommended as means of increasing whitefish production in the Great Lakes________ 682 
SBD L0 priray po Wy a a ee a ee 683 
644 
