Antarctic Gastropod Toxicity Bioassays for Fuel and Dispersant Exposure

Antarctic bioassay data showing the response of the microgastropod Skenella palludinoides to Special Antarctic Blend diesel and Ardrox 6120 dispersant. The dataset contains results from Water Accommodated Fractions (WAF), Chemically Enhanced WAF (CEWAF), and dispersant-only treatments, with mortality curves and LC50 values calculated from experiments lasting up to 35 days. Data was collected by AU_AADC and last updated in May 2014.

Use Cases

• Modeling dose-response mortality curves based on the described concentration series (100% to 0.1%).
• Comparing toxicity of physically versus chemically dispersed fuels based on WAF and CEWAF treatments.
• Assessing the independent toxicity of chemical dispersants based on the dispersant-only control experiments.
• Studying the effects of hydrocarbon exposure under simulated Antarctic summer conditions (0°C, 18h light).

Strengths

• Experimental design includes five replicates per concentration and five filtered seawater controls.
• Methods detail specific preparation ratios (e.g., 1:25 fuel to seawater for WAF) and mixing protocols for reproducibility.
• Test concentrations were chosen to quantify mortality curves and allow statistical calculation of LC50 values.

Limitations

• Last updated 2014-05-31 23:59:59.999000; freshness should be verified.
• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

AU_AADC via nasa_earthdata

Collection Method

Laboratory bioassays following adapted methods from Singer et al. (2000), Barron and Ka’aihue (2003), and Brown et al. (2017).

Time Range

Experiments ran for 35 days (WAF/CEWAF) and 15 days (dispersant only).

Freshness

Last updated 2014-05-31 23:59:59.999000

Geography

Antarctic marine environment (simulated).