Table 5
Sensitivity of Lakes Geneva and Superior general additive models to decisions made on the handling of explanatory variable data. Variables that were included in the top-performing model (bold text) and alternatives explored have an associated approximate P-value whereas dashes indicate the variable was not included. Potential explanatory variables for explaining larval densities included bathymetric depths (Depth in m), Julian Day, edible zooplankton density (EZ, ind.L−1), and wind vectors (u = east-west, v = north-south). Wind speed (km/hr) was only used as an explanatory variable in one model (with wind vectors dropped). An NA is present when an explanatory variable was not used in the analysis, a hyphen is used when the explanatory variable was included in the analyses but was not selected in the top model.
| Lake | Model alternative | Depth | Julian day | EZ | u | v | Wind speed |
|---|---|---|---|---|---|---|---|
| Geneva | Top-performing model described in Materials and methods | <0.001 | 0.09 | – | – | <0.01 | NA |
| Wind vectors based on 1.33 days prior to sampling | <0.001 | 0.05 | – | – | <0.001 | NA | |
| Average wind speeds (including zeroes) | <0.001 | – | – | NA | NA | <0.01 | |
| Available zooplankton based on 200-μm mesh which necessitated dropping 1st event | <0.001 | – | – | <0.001 | – | NA | |
| Averaged across depth categories (shallow, middle, deep) | <0.001 | – | – | – | 0.04 | NA | |
| Superior | Top-performing model described in Materials and methods | <0.001 | – | – | 0.01 | – | NA |
| No borrowing of missing explanatory data | 0.02 | – | – | 0.05 | – | NA | |
| Wind vectors based on 1.33 days prior to sampling | <0.001 | – | – | 0.01 | – | NA | |
| Wind vectors based on 0.33 days prior to sampling | <0.001 | – | – | 0.02 | – | NA | |
| Available zooplankton based on 200-μm mesh | <0.001 | – | – | 0.01 | – | NA | |
| Averaged across depth categories (shallow, middle, deep) | 0.04 | – | – | – | - | NA |
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.