Sockeye Salmon Can't Handle the Heat

As rivers along the Pacific coast get warmer, the survival rate of migrating sockeye salmon will plummet.

Culverts Disconnect Fish Streams

Half the culverts placed in creeks of Alberta's boreal forest hang in mid-air, preventing fish from travelling upstream.

New Fish Arrives in Arctic Ocean

One marine animal has quickly taken advantage of the recent rise in northern ocean temperatures.

Pacific Fish Have Gotten Smaller

The size of fish living near the ocean floor along the Pacific coast of the United States has declined dramatically in two decades.

Rockfish Caught Near Salmon Farms High in Mercury

Mercury concentrations are elevated in copper rockfish and quillback rockfish taken near salmon farms along British Columbia’s coast.

Fish in US Rivers Contaminated With Mercury

Many of the larger fish in rivers of the western United States have mercury levels that exceed federal guidelines for safe human food.

Escaped Fish Destroy Native Ecology

Out of the 3072 reported incidents of fish getting loose into a foreign ecosystem, 60% have founded wild populations.

Rainbow Smelt Decimate Walleye Stocks

Data now confirm that walleye stocks plummet after rainbow smelt move into a lake.

Salmon

Wild Adult Salmon Aren't Exacerbating Lice Epidemic

Marine biologists were surprised to find that the numbers of sea lice on juvenile salmon didn't climb when louse-infested wild adults swam by on their way to spawning.

Juvenile Salmon Succumb to Sea Lice

It only takes a few sea lice to kill juvenile pink and chum salmon, and most louse-infested fish die.

Record Wild Salmon Return - Despite Sea Lice

A record 34% of pink salmon fry from rivers flowing into Kingcome and Knight Inlets in British Columbia survived at sea and returned to spawn in 2004.

Migration No Longer Separates Salmon From Sea Lice

Analyses of several sets of data finds mortality rates of 9 to 95% among various juvenile wild salmon populations as they migrate past salmon farms east of Vancouver Island.

Pink Salmon Competition Reduces Chinook Survival

Young chinook salmon fair poorly when competing with large numbers of pink salmon.

Chinook Salmon Rapidly Colonize Rivers

It's taken less than thirty years for chinook salmon that were let loose in South America to establish spawning runs along 1500 kilometres of the South Pacific coast.

Endangered Fish Species

Hundreds of Pacific Salmon Populations Now Extinct

Scientists conservatively estimate that well over one-quarter of native Pacific salmon populations spawning in rivers and lakes from California to southern British Columbia have gone extinct.

Pacific Salmon Population Extinctions in the US

Lists of regional losses and population extinctions of native salmon in the western United States.

Fish No Longer in Canada

Thirteen species, subspecies and isolated populations of freshwater fish have vanished from Canada.

Exotic Species Endanger Native Fish

Non-native fish are already implicated in the extinctions of five fish species in Canada and they threaten the continued existence of many others.

Bull Trout Form Two Discrete Lineages

Analysis of bull trout from British Columbia’s coastal rivers finds that this species of special conservation concern comprises two genetically distinct groups.

Logging Predicted to Extirpate Bull Trout

Forecasts indicate that bull trout will become extirpated from many portions of Alberta’s Kakwa watershed within the next 20 years.

Sharks, Seabass Rebound After Fishing Banned

Big fish have returned to California's southern coast following a 15-year ban on gill net fishing.