Table 5
Factors considered during the boruta regression tree analysis of larval crashes and mortality. Significant predictors as identified by the boruta algorithm are listed in order of importance from top to bottom. Terms retained as significant in the general linear model. *** indicates statistical significance at p<0.001 and ** at p<0.01 in the associated logit linear model. Full results are provided in Table S2.
| Possible predictors of hatchery crashes | Significant predictors of: | ||
|---|---|---|---|
| Broodstock related factors | Larvae related factors | Hatchery crashes | Mortality in surviving batches |
| Hatchery | Frequency larval cleaning (days) | Temperature larval tank | Broodstock density*** |
| Year of production | Temperature larval tank (°C) | Broodstock origin | Temperature conditioning [endpoint]*** |
| Broodstock origin | Salinity (ppt) larvae | Broodstock density | Hatchery |
| Broodstock release number | Larval density at stocking (ind/ml) | Week number larval release | Frequency broodstock cleaning |
| Quarantine applied | Larval feed delivery frequency | Broodstock release number | Salinity (ppt) larvae*** |
| Frequency broodstock cleaning | Proportion larval feed diatom | Duration of conditioning | Conditioning salinity (ppt) |
| Broodstock density at larval release | Larval setup | Larval feed delivery frequency | Broodstock origin |
| In/Out of season | Grading undertaken | Proportion broodstock feed diatom | Algal paste used in broodstock feeding** |
| Duration of conditioning (days) | Week number larval release | Algal paste used in broodstock feeding | Week number larval release |
| Conditioning Photoperiod (min light per day) | Number larvae in release (x1000) | Temperature conditioning [endpoint] | Frequency larval cleaning |
| Temperature conditioning (°C) [endpoint] | In/Out of season | Temperature larval tank (°C) | |
| Conditioning Salinity (ppt) | Duration collection to larval release (days) | ||
| Use air pumps broodstock | Quarantine applied | ||
| Algal paste used in broodstock feeding | |||
| Feed delivery frequency broodstock | |||
| Proportion broodstock feed diatom | |||
| Duration collection to larval release (days) | |||
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