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 (77)

Alsek

Long-term trend: -72.6% change over all years

Bella Coola-Bentinck

Long-term trend: -41.6% change over all years

Big Salmon

Long-term trend: -38.1% change over all years

Boundary Bay (Fall 4-1)

Long-term trend: 86% change over all years

Dean River

Long-term trend: 6.3% change over all years

Docee

Long-term trend: -52.8% change over all years

East Vancouver Island-Cowichan and Koksilah (Fall x-1)

Long-term trend: -29.9% change over all years

East Vancouver Island-Georgia Strait (Summer 4-1)

Long-term trend: 16.7% change over all years

East Vancouver Island-Goldstream (Fall x-1)

Long-term trend: -97.3% change over all years

East Vancouver Island-Nanaimo and Chemainus (Fall x-1)

Long-term trend: 60.6% change over all years

East Vancouver Island-North (Fall x-1)

Long-term trend: -43.8% change over all years

East Vancouver Island-Qualicum and Puntledge (Fall x-1)

Long-term trend: -15.1% change over all years

Ecstall

Long-term trend: -78.7% change over all years

Fraser Canyon-Nahatlatch (Spring 5-2)

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

Kalum-Early

Long-term trend: 11.8% change over all years

Kalum-Late

Long-term trend: -27.5% change over all years

Lower Fraser River (Fall 4-1)

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

Lower Fraser River (Spring 5-2)

Long-term trend: 54.4% change over all years

Lower Fraser River (Summer 5-2)

Long-term trend: 45.6% change over all years

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

Long-term trend: 266.4% change over all years

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

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

Lower Skeena

Long-term trend: -40.1% change over all years

Lower Thompson River (Spring 4-2)

Long-term trend: 26.4% change over all years

Middle Fraser River (Spring 5-2)

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

Middle Fraser River (Summer 5-2)

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

Middle Fraser River-Portage (Fall 5-2)

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

Middle Skeena-Large Lakes

Long-term trend: -55.3% change over all years

Middle Skeena-Mainstem Tributaries

Long-term trend: -44.9% change over all years

Middle Yukon

Long-term trend: -25.5% change over all years

Nordenskiold

Long-term trend: -18.3% change over all years

North & Central Coast-Early

Long-term trend: -24.4% change over all years

North & Central Coast-Late

Long-term trend: 191.8% change over all years

North Haida Gwaii

Long-term trend: 370.9% change over all years

North Thompson River (Spring 5-2)

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

North Thompson River (Summer 5-2)

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

Northern Yukon

Long-term trend: -74.3% change over all years

Okanagan

Long-term trend: 320.6% change over all years

Old Crow

Long-term trend: -83.1% change over all years

Pelly

Long-term trend: -51% change over all years

Porcupine

Long-term trend: -83.1% change over all years

Portland Sound-Observatory Inlet-Lower Nass

Long-term trend: 9.3% change over all years

Rivers Inlet

Long-term trend: 53% change over all years

Shuswap River (Summer 4-1)

Long-term trend: 158.2% change over all years

South Thompson River (Summer 4-1)

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

South Thompson River (Summer 5-2)

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

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

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

South Thompson-Adams River Upper

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

Southern Mainland-Georgia Strait (Fall x-1)

Long-term trend: -21.3% change over all years

Southern Mainland-Southern Fjords (Fall x-1)

Long-term trend: 1,551.3% change over all years

Stewart

Long-term trend: -51.2% change over all years

Teslin

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

Upper Bulkley River

Long-term trend: 541.6% change over all years

Upper Fraser River (Spring 5-2)

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

Upper Nass

Long-term trend: -46.8% change over all years

Upper Skeena

Long-term trend: -53.8% change over all years

Upper Yukon

Long-term trend: -30.6% change over all years

Wannock

Long-term trend: 26.4% change over all years

West Vancouver Island-Nootka and Kyuquot (Fall x-1)

Long-term trend: 25.1% change over all years

West Vancouver Island-North (Fall x-1)

Long-term trend: -2.6% change over all years

West Vancouver Island-South (Fall x-1)

Long-term trend: -25.1% change over all years

White

Long-term trend: -53.5% change over all years

Zymoetz

Long-term trend: -28.2% change over all years

East Haida Gwaii

East Vancouver Island-Nanaimo (Spring x-2)

Homathko (Summer x-x)

Klinaklini (Summer 5-2)

Lakelse

Lynn Canal

Salmon Fork

Skeena Estuary

Stikine-Early Timing

Stikine-Late Timing

Taku-Early Timing

Taku-Late Timing

Taku-Mid Timing

Unuk

Whiting