Table A1
Linear models developed to predict standard length of zooplankton from total lengths. These models were applied to subset of samples where total length was measured instead of standard length. In some cases, the taxa were present in such low abundance, especially in Lake Superior, to be impractical to locate even 30 individuals to develop such models. For these instances, we either used the best applicable model available, regardless of lake, or made no effort to apply a correction because the taxa were present in very low numbers in our data set of length measurements. The Note column shows those decisions. For example, we had a single Harpacticoid measured incorrectly, so we assumed the correct length was 0.8 that of the incorrect measurement.
Lake | Family or genus | Intercept | Slope | N | R2 | Note |
---|---|---|---|---|---|---|
Geneva | Acanthocyclops | 0.063 | 0.763 | 70 | 0.98 | |
Bosmina | No effort; only 8 measured during study. | |||||
Calanoid copepodite | −0.034 | 0.905 | 60 | 0.92 | ||
Cyclopoid copepodite | −0.008 | 0.827 | 60 | 0.83 | ||
Cyclops | −0.067 | 0.894 | 70 | 0.95 | ||
Daphnia | −0.023 | 0.691 | 60 | 0.94 | ||
Eudiaptomus | 0.029 | 0.859 | 60 | 0.91 | ||
Leptodiaptomus | Lake Geneva Eudiaptomus | |||||
Nauplii | 0.15 | 0.720 | 60 | 0.77 | ||
Superior | Acanthocyclops | Lake Geneva Acanthocyclops | ||||
Cyclopoid copepodite | Lake Geneva Cyclopoid copepodite | |||||
Cyclops | Lake Geneva Cyclops | |||||
Daphnia | Lake Geneva Daphnia | |||||
Diacyclops | 0.011 | 0.772 | 40 | 0.81 | ||
Diaptomus | −0.053 | 0.870 | 40 | 0.92 | ||
Epischura | −0.050 | 0.850 | 30 | 0.85 | ||
Harpacticoid | 0.000 | 0.80 | Assumed correct length was 0.8 of incorrect measurement. | |||
Leptodiaptomus | −0.144 | 0.921 | 40 | 0.92 | ||
Limnocalanus | 0.042 | 0.822 | 40 | 0.97 | ||
Mesocyclops | Lake Geneva cyclops | |||||
Senecella | 0.073 | 0.76 | 40 | 0.84 | ||
Nauplii | Not measured in Superior |
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