Table 3. — Chemical analyses of water from sockeye salmon nursery lakes of southwestern Alaska, 1 961-62 — Continued 



Total Ni- 



dia- Total Po- Mag- trate 



solved pH alka- Sodi- tas- nesi- nitro- 



System and lake solids Unity um sium um gen Silica 



Man- Cal- Cop- 



Iron ganese cium Boron per 



Mo- 



Stron-Alumi- lyb- 

 tium num denum 



PENINSULA 



SYSTEMS 

 Alagnak (Branch) 

 system 



Kukaklek Lake.. 



Nonvianuk Lake. 

 Naknek system 



Coville Lake 



Grosvenor Lake. 



Naknek Lake '. . 



P.p.m. 



23 

 32 5 



51 6 

 53 5 

 139 5 



P.p.-m. P.p.m. P.p.m. P.p.m. P.p.m. P.p.m. P.p.m. P.p.m. P.p.m. P.p.m. P.p.m. P.p.m. P.p.m. P.p.m. 



7.00 8.88 

 7,21 10.54 



7.13 25 28 

 7 24 25 42 



4.02 

 3,25 



3.18 

 2 98 



1 23 

 .90 



1 15 

 1 12 



018 

 .017 



7 35 28 54 10.40 1 



.46 

 47 

 16 



1 21 < 014 

 1 89 < 014 

 4 16 .087 



1.1 

 4.1 



9 

 7 7 

 9 3 



040 



052 

 040 

 040 



3 29 



5 33 



7 79 



6 90 

 18 16 



003 

 003 

 .008 



Iliuk Arm 7.27 28 61 



Brooks Lake 



Ugashik system 



Lower Ugashik 



Lake 



Chignik system 



Chignik Lake.. 



Black Lake 



74 8 7 31 26.78 4 30 



22 4 7 23 14 57 7.13 



041 



.01 8 88 004 



80 1 28 .019 



7 65 21 31 

 7 44 21 53 



35 

 07 



1 31 

 1 43 



026 

 014 



12 9 

 12 6 



Karluk system 

 Karluk Lake 



42.9 7 25 25 22 3.32 .26 1.47 036 



024 

 016 



042 



002 7 43 

 002 10 36 



.027 

 042 



0006 

 0009 



07 

 12 



007 

 010 



0011 

 0001 



' Excluding Iliuk Arm. Iliuk Arm is considered separately because of the large amount of suspended glacial material. 



Table 4. — Ranking of sockeye salmon nursery lakes of south- 

 western Alaska according to total dissolved solids, total 

 alkalinity, and pH, 1961-62 



Lake 



Total 

 dissolved Total 

 System solids alkalinity 



Table 5. — Mean equivalent proportions of the three major 

 cations — sodium, calcium, and magnesium — in water 

 samples from sockeye salmon lakes of southivestern Alaska, 

 June to September 1961-62 



pH 



System and lake 



Sodium Magnesium Calcium 



Naknek •. Naknek 



Brooks Naknek 



Black Chignik 



Chignik Chignik 



Grosvenor Naknek 



Coville Naknek 



ChauekuktuH Nuyakuk 



Karluk Karl uk 



Tikchik. . _ Nuyakuk 



Nuyakuk _ Nuyakuk 



Little Togiak Wood 



Nonvi anuk Alagnak 



Clark Kvichak 



Aleknagik Wood 



Iliamna Kvichak 



Kulik Wood 



Beverley Wood 



Kukaklek Alagnak 



Lower Ugashik Ugashik 



Amanka Igushik 



Nerka... Wood 



Nunavaugaluk Snake 



Ualik Igushik 



1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



11 



12 



13 



14 



16 



16 



17 



18 



19 



20 



21 



22 



23 



2 



3 



9 



10 



4 



5 



1 



6 



8 



7 



12 



20 



11 



16 



14 



16 



18 



23 



13 



19 



17 



22 



21 



3 



5 



2 



1 



13 



20 



8 



12 



4 



6 



8 



15 



10 



18 



11 



22 



15 



23 



14 



7 



19 



17 



20 



MAINLAND SYSTEMS 



Igushik system 



Amanka Lake 



Ualik Lake 



7 

 12 



Snake system 



Lake Nunavaugaluk. 



Wood system 



Lake Aleknagik 



Lake Nerka 



Lake Beverley 



Lake Kulik 



Little Togiak Lake... 



18 

 20 



17 



Percent 



75 

 68 



Nuyakuk (Tikchik) system 



Tikchik Lake 



Nuyakuk Lake 



Lake ChauekuktuH 



Kvichak system 



Iliamna Lake 



Lake Clark 



^ Excludinif North Arm and Iliuk Arm. 

 Equivalent Proportions of Sodium, Calcium, and Magnesium 



Lakes of the Mainland Systems clearly differ 

 from those of the Peninsula Systems in the pro- 

 portion (based on number of equivalents per 

 million)' of each of the three principal cations 

 — sodium, calcium, and magnesium. To deter- 



PENINSULA SYSTEMS 



Alagnak (Branch) system 



Kukaklek Lake 



Nonvianuk Lake 



Naknek system 



Coville Lake 



Grosvenor Lake 



Naknek Lake 



Brooks Lake 



" Equivalents per million are determined by multiplying the parts per 

 million by the reciprocals of combining weights of the appropriate 

 ions. The combining weight of an ion equals the atomic weight of the 

 ion divided by its ionic charge. 



Ugashik system 



Lower Ugashik Lake. 



Chignik system 



Chignik Lake 



Black Lake 



Karluk system 



Karluk Lake 



SOCKEYE SALMON IN MAJOR RIVER SYSTEMS IN SOUTHWESTERN ALASKA 



4i;^ 



