Chenik Lake - Cook Inlet Aquaculture Association, Kenai, Alaska

RESULTS AND DISCUSSION
Limnological Conditions
Limnological conditions are a key component in understanding Shell Lake productivity and
rearing conditions in this monitoring study. Water chemistry and zooplankton were conducted 3
times in 2006. In 2007, water chemistry and zooplankton samples were collected 4 times. In
2008, water chemistry and zooplankton samples were collected 5 times. In 2009, water
chemistry and zooplankton data were collected 5 times. A summary of limnological conditions
is listed in Table 1. ADF&G provided the analysis for limnological conditions.
Table 1 – Average open water season water quality characteristics of Shell Lake
AVERAGE WATER QUALITY - 1 METER
TP TFP FRP TKN NH3+NH4 NO2+NO3 RSi Org C Chla Phaeo EZD Sp. Cond pH Alk Turb Color Ca Mg Fe Secchi
Year (ug/l) (ug/l) (ug/l) (ug/l) (ug/l) (ug/l) TN:TP (ug/l) (ug/l) (ug/l) (ug/l) Sta (m) (umhos/cm) (SU) (mg/l) (NTU) (Pt) (mg/l) (mg/l) (ug/l) Sta (meters)
2006 11.2 4.3 3.7 302.7 16.1 559.2 170 :1 4,202 749 1.39 0.46 A 6.0 32 5.6 10.1 0.4 22 4.3 0.5 85 A 4.0
2007 7.6 4.2 3.7 253.7 12.5 480.8 213 :1 4,205 484 0.99 0.36 A 7.5 37 6.7 15.3 0.5 11 4.8 0.7 44 A 5.1
2008 14.0 11.3 2.4 233.2 13.4 417.4 103 :1 3,875 220 0.79 0.50 A 8.3 31 6.7 13.1 0.6 20 3.9 0.8 62 A 4.1
2009 12.1 8.1 1.3 222.0 8.1 393.8 113 :1 3,778 241 1.03 0.45 A 7.8 35 6.5 12.8 0.6 15 4.4 1.0 51 A 4.3
AVERAGE WATER QUALITY - HYPOLIMNION
TP TFP FRP TKN NH3+NH4 NO2+NO3 RSi Org C Chla Phaeo EZD Sp. Cond pH Alk Turb Color Ca Mg Fe Secchi
Year (ug/l) (ug/l) (ug/l) (ug/l) (ug/l) (ug/l) TN:TP (ug/l) (ug/l) (ug/l) (ug/l) Sta (m) (umhos/cm) (SU) (mg/l) (NTU) (Pt) (mg/l) (mg/l) (ug/l) Sta (meters)
2006 7.6 4.2 3.7 253.7 12.5 480.8 213 :1 4,205 484 0.99 0.36 B 7.5 37 6.7 15.3 0.5 11 4.8 0.7 44 B 5.1
2007 11.2 4.3 3.7 302.7 16.1 559.2 170 :1 4,202 749 1.39 0.46 B 6.0 32 5.6 10.1 0.4 22 4.3 0.5 85 B 4.0
2008 8.7 6.2 2.3 210.1 10.2 467.1 172 :1 3,929 175 0.54 0.49 B 7.4 31 6.5 12.7 0.5 20 4.0 0.9 61 B 4.4
2009 9.4 5.9 1.6 204.6 9.6 480.4 162 :1 3,928 141 0.41 0.41 B 7.6 31 6.1 11.6 0.5 21 4.1 0.6 74 B 4.1
EZD and Secchi provided by CIAA.
Open water season only.
Table 2 – Seasonal Mean Zooplankton Density and Biomass of Shell Lake
Density
Biomass
Seasonal Mean Seasonal Weighted Mean
Year (No/m2) (mg/m2)
2006 147,436 440
2007 281,941 791
2008 132,824 533
2009 231,291 621
Environmental Conditions
During the 2006 adult sockeye migration environmental conditions were monitored from 15 July
to 21 August. Due to a delay in delivery of environmental apparatus, data was not recorded for
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