Nuyakuk, and Karluk systems rank highest in the values in sockeye salmon lakes of southwest- 

 total dissolved solids, and those of the Igushik ern Alaska. 



and Snake systems rank lowest. Usually the Several investigators have used total dis- 



values for the three characteristics were similar solved solids to predict lake productivity (cf . 



in all of the lakes of a system. The concentra- Larkin and Northcote, 1958 ; Rawson, 1942, 



tions of total dissolved solids in other deep-water 1961 ) . A comparison of this characteristic with 



lakes in the Northern Hemisphere (reported by measures of lake productivity is made later. 

 Hutchinson, 1957) are generally higher than 



Table 2. — Months and depths of sampling and numbers of determinations of temperature and various chemical char- 

 acteristics of sockeye salmon nursery lakes of southwestern Alaska, 1961-62 



Determinations made Determinations made 



Month Total Min- Month Total Min- 



of Depth Tem- di»- erai of Depth Tern- dis- eral 



sam- sam- O2 pera- Alka- solved ana- sam- sam- Oi pera- Alka- solved ana- 



System and lake pling pled ture Unity pH solids lysis System and lake pling pled Hire Unity pH solids lysis 



MAINLAND PENINSULA XI Vo. \o. Vn. So. So. So. 



SYSTEMS M. No. No. No. No. No. No. SYSTEMS 



Igushik system Alagnak (Branch) 



AroankaLake.-- Aug. 0-26 2 24 2 2 system 



UalikLake Aug. 0-26 2 36 4 4 2 2 Kukaklek Lake . July-Aug. 20 8 17 7 8 4 8 



Snake system Nonvianuk Lake Jul y-Aug. 25 9 20 9 9 4 8 



Lake Nuna- Naknek system 



vaugaluk Aug. 0-46 16 4 4 2 2 Coville Lake June-Oct. 26 163 286 149 160 10 14 



Wood system Grosvenor Lake. . June-Oct. 46 198 663 178 178 10 16 



Lake Aleknagik.. June-Oct. 0-46 34 192 62 62 10 10 Naknek Lake. ._ June-May 36 260 742 264 266 14 19 



LakeNerka June-Oct. 0-46 172 1,915 176 176 14 14 Brooks Lake June-May 36 249 676 248 249 16 20 



Lake Beverley.-- June-Oct. 0-46 21 194 26 26 8 8 Ugashik system 



LakeKulik June-Oct. 0-45 26 221 26 26 8 8 Lower Ugashik 



Little Togiak Lake..-- Aug. 26 18 7 7 6 14 



Lake June-Oct. 0-45 34 225 30 30 7 7 Chignik system 



Nuyakuk (Tikchik) Chignik Lake. -_ June-Oct. 30 61 64 16 15 



jygtem Black Lake June-Oct. 4.5 43 41 11 12 



Tikchik Lake-.- Aug, 0-30 1 30 4 4 2 2 Karluk system 



Nuyakuk Lake-- Aug. 0-30 -- 2 2 Karluk Lake June-Oct. 46 214 557 227 222 16 15 



Lake Chauekuk- 



tuli Aug. 0-45 1 48 4 4 2 2 



KTichak system 



Iliamna Lake... June-Oct. 0-45 74 3,164 45 46 37 37 



Lake Clark June-Oct. 0-45 ... 227 8 8 4 4 



Table 3. — Chemical analyses of water from sockeye salmx>n nursery lakes of southwestern Alaska, 1961-62 



Total Ni- 



dis- Total Po- Mag- trate Mo- 

 solved pH alka- Sodi- tas- nesi- nitro- Man- Cal- Cop- Stron- Alumi- lyb- 

 System and lake solids Unity um sium um gen Silica Iron ganese cium Boron per tium num denum 



MAINLAND 



SYSTEMS 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.P.p.m. 



Igushik system 



Amanka Lake-.. 21.5 7.30 10.84 0.55<0.20 0.76 0.075 4.3 010 002 5 10 007 0003 06 005 0015 



UahkLake 17.6 7.13 10.60 .80 .35 .70 020 2.1 Oil 001 3 95 Oil .0004 08 003 0014 



Snake system 



Lake Nuna- 

 vaugaluk 18.0 7.16 10,42 .56 <.30 .66 .120 2.1 010 001 4 90 007 0003 07 003<.O001 



Wood system 



Lake Aleknagik-- 30.5 7.15 12,51 .63 .35 .95 .111 2.6 006 001 4 95 008 0003 07 004 0004 



LakeNerka 20.7 7.14 11.99 .46 .37 .87 .167 2.2 Oil 001 4 68 015 0003 06 005 0013 



Lake Beverley--- 24.0 7.21 11.90 .80 <.33 .80 .160 2.8 008 .001 4 23 012 0003 07 006 0004 



LakeKulik 25.3 7.11 12.46 .68 .33 .68 ,173 3.0 009 001 4 65 005 0003 08 004 0015 



Little Togiak 



Lake 36.0 7,29 18.69 .76 .50 1.33 .160 3.3 .006 001 7 23 013 0002 10 004 0006 



Nuyakuk (Tikchik) 

 system 



TikchikLake 42,0 7,34 22.46 .55 <.70 2.12 .090 6.4 010 001 7 70 010 0004 09 005 trace 



Nuyakuk Lake-- 36.5 7.30 22.99 .40 Trace 1.55 .110 6.4 007 trace 8 40 017 0004 10 005<.O001 



Lake Chauekuk- 



tuU 50,0 7.29 29.46 .40 Trace 2.60 .135 6,4 005 trace 1100 .009 0004 10 003 0003 



Kvichak system 

 lUamna Lake-.-. 26.3 7.26 13.96 .83 .60 ,83 .068 4.5 OU < 003 5 11 022 0004 06 010 0016 



LakeClark 32.0 7.28 19.59 .80 1.28 1.03 .113 8.6 026 001 6.75 .030 0006 .09 .017 .0028 



412 



U.S. FISH AND WILDLIFE SERVICE 



