Table 6: Correlations involving fish. Correlation p-values (one-tailed) for correlations between the two variables shown in each row. Transformed data used for p-values were the first-differenced time series used when one or both of the time series were autocorrelated. Empty cells indicate that the time series of neither variable was auto-correlated. Pearson’s correlation coefficient (r) values are shown for the untransformed data. Correlations are based on May-October averages for each of nine years (2005-2013), except for Mysis biomass, which was averaged over June-October. All comparisons to age-0 sockeye survival had the 2010 data point removed because of evidence for both an initial acute and then persistent chronic influence of the Testalinden event on anomalously low fry survival in that year (see text for details). River discharge is the cumulative annual discharge from May 1st to the end of October and is used as a proxy for cumulative inflow to the lake.

Row First correlation variable Second correlation variable Pearson's r p (Untrans-formed data) p (Trans-formed data)
Potential bottom up correlations - - - - -
1 Total zooplankton biomass Age-0 nerkid November weight 0.28 0.23 0.21 ns
2 Total zooplankton biomass Age-0 nerkid Von Bertalanffy W -0.04 0.46 0.10 ns
3 Total zooplankton biomass Age-0 nerkid Von Bertalanffy K 0.11 0.39 0.27 ns
4 Total zooplankton biomass Age-0 nerkid survival 0.80 0.01 - sig
5 Daphnia biomass Age-0 nerkid survival 0.76 0.01 - sig
6 Epischura biomass Age-0 nerkid survival 0.80 0.01 - sig
7 Mysis biomass Age-0 nerkid Von Bertalanffy W -0.18 0.32 - ns
8 Mysis biomass Age-0 nerkid Von Bertalanffy K -0.11 0.39
- ns
9 Mysis biomass Age-0 nerkid survival 0.32 0.22 ns
Potential top-down correlations - - - - -
10 Age-0 nerkid density Von Bertalanffy W -0.60 0.04 - sig
11 Age-0 nerkid density Von Bertalanffy K 0.37 0.16 - ns
12 Age-0 nerkid density Age-0 nerkid November weight -0.53 0.07 - ns
13 Age-0 nerkid biomass Age-0 nerkid November weight -0.38 0.16 - ns
14 All limnetic fish biomass Age-0 nerkid November weight -0.34 0.19 - ns
15 Age-0 nerkid density Age-0 nerkid survival -0.51 0.10 - ns
16 Age-0 nerkid biomass Age-0 nerkid survival -0.41 0.16 - ns
17 All limnetic fish biomass Age-0 nerkid survival -0.35 0.19 - ns
18 Age-0 nerkid density Total zooplankton biomass -0.08 0.42 0.14 ns
19 Age-0 nerkid biomass Total zooplankton biomass 0.09 0.41 0.15 ns
20 All limnetic fish biomass Total zooplankton biomass -0.11 0.39 0.21 ns
21 Age-0 nerkid density Mysis biomass 0.12 0.37 - ns
22 Age-0 nerkid biomass Mysis biomass -0.06 0.44 - ns
23 All limnetic fish biomass Mysis biomass 0.00 0.5 - ns