Developing demographic toxicity data: optimizing effort for predicting population outcomes.

摘要: Mounting evidence suggests that population endpoints in risk assessment are far more accurate than static assessments. Complete demographic toxicity data based on full life tables eminently useful predicting outcomes many applications because they capture both lethal and sublethal effects; however, developing these is extremely costly. In this study we investigated the efficiency of partial cycle tests as a substitute for cycles parameterizing models. Life table were developed three species Daphniids, Ceriodaphnia dubia, Daphnia magna, D. pulex, weekly throughout span species. Population growth rates (λ) series other parameters generated from complete compared to those calculated cumulative weeks order determine minimum number needed generate an projection. Results showed C. dubia λ values at >4 (44.4% cycle) not significantly different (9 weeks) each For >7 (70% (10 weeks). Furthermore, cutoff points same parameters, with no clear pattern emerging. Our results indicate can be used lieu tables. However, implications differences need further.