Juvenile Atlantic Salmon Densities in Nova Scotian Rivers

Electrofishing surveys track juvenile Atlantic salmon population densities in rivers of Nova Scotia flowing into the Gulf of St. Lawrence. Fixed-site sampling has been conducted most consistently since the mid-1980s, with data on species counts and distribution. Densities are derived from successive removal or catch-per-unit-effort sampling calibrated to habitat area.

Use Cases

• Model juvenile salmon densities from species counts and habitat area data to assess population trends.
• Analyze spatial distribution patterns of salmon across rivers using geospatial point data.
• Investigate long-term changes in species counts from the mid-1980s to present for conservation planning.

Strengths

• Long-term monitoring with consistent fixed-site sampling since the mid-1980s.
• Data includes multiple ecological parameters: species counts, distribution, and spatial points.
• Data is provided in multiple accessible formats including CSV and ESRI REST.

Limitations

• Specific sample sizes, row counts, and column definitions are not provided in the input.
• Sampling intensity varies among years and rivers, which may affect temporal and spatial comparability.
• The absence of raw column names limits precise understanding of the data structure.

Provenance

Source

Fisheries and Oceans Canada

Collection Method

Electrofishing surveys using successive removal or catch-per-unit-effort sampling.

Time Range

Mid-1980s to present

Freshness

null

Geography

Rivers in Nova Scotia flowing into the Gulf of St. Lawrence (SFA 18A, 18B)