Otolith Chemistry and Life History of Antarctic Toothfish

AMD_USAPDC research measures trace elements and stable isotopes in otoliths from Antarctic toothfish. The dataset includes three distinct otolith collections spanning the last four decades in the Ross Sea. This project aims to quantify fish transport pathways and assess impacts from fishing and climate change.

Use Cases

• Analyze trace element concentrations in otoliths to reconstruct fish migration pathways.
• Compare stable isotope ratios across decades to infer changes in ocean conditions.
• Map otolith chemistry data spatially using GIS to assess population connectivity across the Ross Sea.
• Correlate otolith age and growth data with chemical signatures to model life history parameters.
• Test changes in life history parameters over time to attribute drivers to fishing pressure or climate change.

Strengths

• Otolith samples collected over four decades provide a multi-decadal time series.
• Three distinct otolith collections offer comparative analysis potential.
• Research combines otolith chemistry with GIS mapping for spatial analysis.

Limitations

• Sample size and row count are unknown.
• Specific column names and data structure are unspecified.
• Geographic coverage is limited to the Ross Sea region.

Provenance

Source

AMD_USAPDC via NASA Earthdata.

Collection Method

Otolith chemistry testing measuring trace elements and stable isotopes, combined with age and growth work and GIS mapping.

Time Range

Otolith collections span the last four decades.

Freshness

Data collection is projected through 2027.

Geography

Ross Sea, Antarctica.