Juvenile Salmon and Oceanographic Data from Gulf of Alaska Trawls, 2001-2004

SCIOPS collected juvenile salmon, pelagic fish, zooplankton, and oceanographic data from Tucker trawls, CTD, and ADCP units in the coastal Gulf of Alaska. Sampling occurred from July 2001 to November 2004 across four research cruises. The survey covered transects from nearshore to beyond the 200m continental shelf break.

Use Cases

• Analyze juvenile salmon catch data in relation to CTD-derived water temperature and salinity profiles.
• Model pelagic fish distribution using ADCP current velocity and direction measurements.
• Correlate zooplankton abundance from vertical plankton tows with juvenile salmon presence data.
• Map survey transects and sampling locations to identify spatial patterns in coastal Gulf of Alaska ecosystems.

Strengths

• Data collection spanned over three years from 2001 to 2004.
• Sampling covered a defined geographic area from nearshore to beyond the 200m shelf break.
• Integrated biological (salmon, fish, zooplankton) and physical (CTD, ADCP) oceanographic data.

Limitations

• Sample size and row count are unknown.
• Data is temporally stale, with the last update in November 2004.
• Specific column names and data structure are unspecified.

Provenance

Source

SCIOPS, via NASA Earthdata.

Collection Method

Surface towing of a rope trawl, Tucker trawl (1-m2 net), and vertical deployment of a WP-2 plankton sampler to 100m depth, with simultaneous CTD and ADCP observations.

Time Range

17 July 2001 to 12 November 2004.

Freshness

Data collection ended in 2004; no update frequency specified.

Geography

Coastal waters of the Gulf of Alaska, along transects from nearshore across the continental shelf to oceanic waters.