PSF
Pacific Salmon Explorer
RegionsMethodsData LibraryAbout

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

Individual Conservation Units (67)

Anderson-Seton-Early Summer

Sockeye
Lake Sockeye
Long-term trend: 46.5% change over all years

Boundary Bay (Fall 4-1)

Chinook
Chinook
Long-term trend: 86% change over all years

Bowron-Early Summer

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

Chilko-Early Summer

Sockeye
Lake Sockeye
Long-term trend: 517.5% change over all years

Chilko-Summer

Sockeye
Lake Sockeye
Long-term trend: 104% change over all years

Chilliwack-Early Summer (cyclic)

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

Cultus-Late

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

Francois-Fraser-Summer

Sockeye
Lake Sockeye
Long-term trend: 21.4% change over all years

Fraser Canyon

Coho
Coho
Long-term trend: -78.1% change over all years

Fraser Canyon-Nahatlatch (Spring 5-2)

Chinook
Chinook
Long-term trend: -75% change over all years

Fraser River (odd)

Pink
Pink (odd)
Long-term trend: 834% change over all years

Harrison River (river-type)

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

Harrison-Downstream Migrating-Late

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

Harrison-Upstream Migrating-Late

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

Interior Fraser

Coho
Coho
Long-term trend: 50.6% change over all years

Kamloops-Early Summer

Sockeye
Lake Sockeye
Long-term trend: 613.8% change over all years

Lillooet-Harrison-Late

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

Lower Fraser

Chum
Chum
Long-term trend: -71.1% change over all years

Lower Fraser River (Fall 4-1)

Chinook
Chinook
Long-term trend: -5.7% change over all years

Lower Fraser River (Spring 5-2)

Chinook
Chinook
Long-term trend: 54.4% change over all years

Lower Fraser River (Summer 5-2)

Chinook
Chinook
Long-term trend: 45.6% change over all years

Lower Fraser River-Maria Slough (Summer 4-1)

Chinook
Chinook
Long-term trend: 266.4% change over all years

Lower Fraser River-Upper Pitt (Summer 5-2)

Chinook
Chinook
Long-term trend: -85.8% change over all years

Lower Thompson

Coho
Coho
Long-term trend: 71.7% change over all years

Lower Thompson River (Spring 4-2)

Chinook
Chinook
Long-term trend: 26.4% change over all years

Mid Fraser Summer

Steelhead
Steelhead
Long-term trend: -90.5% change over all years

Middle Fraser River (Spring 5-2)

Chinook
Chinook
Long-term trend: -65.9% change over all years

Middle Fraser River (Summer 5-2)

Chinook
Chinook
Long-term trend: -19.2% change over all years

Middle Fraser River-Portage (Fall 5-2)

Chinook
Chinook
Long-term trend: -69.3% change over all years

Nadina-Francois-Early Summer

Sockeye
Lake Sockeye
Long-term trend: 250.7% change over all years

Nahatlatch-Early Summer

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

North Barriere-Early Summer (de novo)

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

North Thompson

Coho
Coho
Long-term trend: -41.5% change over all years

North Thompson River (Spring 5-2)

Chinook
Chinook
Long-term trend: -86.8% change over all years

North Thompson River (Summer 5-2)

Chinook
Chinook
Long-term trend: -49.5% change over all years

Pitt-Early Summer

Sockeye
Lake Sockeye
Long-term trend: 100% change over all years

Quesnel-Summer (cyclic)

Sockeye
Lake Sockeye
Long-term trend: 10.8% change over all years

Seton-Late (de novo)

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

Shuswap River (Summer 4-1)

Chinook
Chinook
Long-term trend: 158.2% change over all years

Shuswap-Early Summer (cyclic)

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

Shuswap-Late (cyclic)

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

South Thompson

Coho
Coho
Long-term trend: -32.4% change over all years

South Thompson River (Summer 4-1)

Chinook
Chinook
Long-term trend: 3,659.6% change over all years

South Thompson River (Summer 5-2)

Chinook
Chinook
Long-term trend: -5.6% change over all years

South Thompson River-Bessette Creek (Summer 4-2)

Chinook
Chinook
Long-term trend: -55.2% change over all years

South Thompson-Adams River Upper

Chinook
Chinook
Long-term trend: -15.8% change over all years

Takla-Trembleur-Early Stuart (cyclic)

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

Takla-Trembleur-Stuart-Summer (cyclic)

Sockeye
Lake Sockeye
Long-term trend: 69.8% change over all years

Taseko-Early Summer

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

Thompson Summer

Steelhead
Steelhead
Long-term trend: -84% change over all years

Upper Fraser River (Spring 5-2)

Chinook
Chinook
Long-term trend: -48.2% change over all years

Widgeon (river-type)

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

Adams-Early Summer

Sockeye
Lake Sockeye
DATA DEFICIENT

Alouette-Early Summer

Sockeye
Lake Sockeye
DATA DEFICIENT

Boundary Bay

Coho
Coho
DATA DEFICIENT

Boundary Bay Winter

Steelhead
Steelhead
DATA DEFICIENT

Coquitlam-Early Summer

Sockeye
Lake Sockeye
DATA DEFICIENT

Fraser Canyon Summer

Steelhead
Steelhead
DATA DEFICIENT

Fraser-Early Summer

Sockeye
Lake Sockeye
DATA DEFICIENT

Kawkawa-Late

Sockeye
Lake Sockeye
DATA DEFICIENT

Lillooet

Coho
Coho
DATA DEFICIENT

Lower Fraser

Coho
Coho
DATA DEFICIENT

Lower Fraser Summer

Steelhead
Steelhead
DATA DEFICIENT

Lower Fraser Winter

Steelhead
Steelhead
DATA DEFICIENT

Momich-Early Summer

Sockeye
Lake Sockeye
DATA DEFICIENT

North Barriere-Early Summer

Sockeye
Lake Sockeye
DATA DEFICIENT

Seton-Summer

Sockeye
Lake Sockeye
DATA DEFICIENT
Northern Transboundary
Haida Gwaii
Nass
Skeena
Central Coast
Fraser
Vancouver Isl. & Mainland Inlets
Columbia
All Regions
Figures

Layers List

Click to add layers