Area Occupied Justification:
If chum salmon are still maintaining populations, there are several (Smith, Trinity, Klamath rivers).
Pop Size Justification:
There is little evidence that any population is more than a handful of spawners, perhaps 6-20 in most years.
Intervention Dependence Score:
Intervention Dependence Justification:
No effort is currently being made to specifically protect chum salmon runs and it is likely that without intervention, the species will soon be extirpated.
Southern populations have fairly narrow spawning habitat requirements and their young require functioning estuarine habitats for rearing.
Genetic Risk Justification:
California populations are extremely small and vulnerable to inbreeding depression and other genetic problems.
Climate Change Justification:
Small changes in flows or temperatures and/or small changes in ocean conditions could eliminate the populations
Severity of most threats unknown (Table 1)
Information is very limited.