Pacific Salmon Explorer

Pacific Salmon Explorer

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Trends in Spawner Abundance

This assessment provides information on the trends in estimated spawner abundance over the long term (all years of data) and short term (most recent three generations) for the selected Conservation Unit(s). Linear trends are estimated on a natural log scale from smoothed spawner abundance time series.

Average spawner abundance per generation
Long-term trend (all years)
Short-term trend (most recent three generations)

Individual Conservation Units (32)

Anderson-Seton-Early Summer

Long-term trend: 46.5% change over all years

Bowron-Early Summer

Long-term trend: -88.7% change over all years

Chilko-Early Summer

Long-term trend: 517.5% change over all years

Chilko-Summer

Long-term trend: 104% change over all years

Chilliwack-Early Summer (cyclic)

Long-term trend: 8,058.4% change over all years

Cultus-Late

Long-term trend: -86.2% change over all years

Francois-Fraser-Summer

Long-term trend: 21.4% change over all years

Harrison River (river-type)

Long-term trend: 4,307.2% change over all years

Harrison-Downstream Migrating-Late

Long-term trend: 1,069.2% change over all years

Harrison-Upstream Migrating-Late

Long-term trend: -93.5% change over all years

Kamloops-Early Summer

Long-term trend: 613.8% change over all years

Lillooet-Harrison-Late

Long-term trend: -75.6% change over all years

Nadina-Francois-Early Summer

Long-term trend: 250.7% change over all years

Nahatlatch-Early Summer

Long-term trend: -6.8% change over all years

North Barriere-Early Summer (de novo)

Long-term trend: -71.5% change over all years

Pitt-Early Summer

Long-term trend: 100% change over all years

Quesnel-Summer (cyclic)

Long-term trend: 10.8% change over all years

Seton-Late (de novo)

Long-term trend: -91% change over all years

Shuswap-Early Summer (cyclic)

Long-term trend: -43.2% change over all years

Shuswap-Late (cyclic)

Long-term trend: -90.8% change over all years

Takla-Trembleur-Early Stuart (cyclic)

Long-term trend: -94.2% change over all years

Takla-Trembleur-Stuart-Summer (cyclic)

Long-term trend: 69.8% change over all years

Taseko-Early Summer

Long-term trend: -22% change over all years

Widgeon (river-type)

Long-term trend: -41% change over all years

Adams-Early Summer

Alouette-Early Summer

Coquitlam-Early Summer

Fraser-Early Summer

Kawkawa-Late

Momich-Early Summer

North Barriere-Early Summer

Seton-Summer