Ability to Respond Total:14 / 25Ability to Respond = ( Ease of Response + Tools in Place )
Confidence:High
Confidence Notes:
Impact
Spread
Notes
Score
Spread Rate
Worldwide introductions: these fish species easily multiply under broad conditions and compete with native fish.
5
Spread Amount
High survivability and occupy many CA habitats.
5
Damage
Notes
Score
Ecological
Several countries report adverse ecological impact after introduction. Pike prey on desirable and native fish and aquatic life, and seriously threaten California's salmon fishery.
5
Agricultural
0
Infrastructure
0
Cultural
0
Health
Human tapeworms and a trematode, fish parasites.
3
Benefit
Notes
Score
Ecological
0
Agricultural
0
Infrastructure
0
Cultural
Considered a good game and food fish.
1
Health
0
Total
17
Ability to Respond
Ease of Response
Notes
Score
Detection
Most fish can be seen in water, fished out, electrofished and poisoned with ease.
4
Control
Aggressive early trapping in an incipient infestation may be effective; electrofishing in heavy populations to a maintenance control level; poisoning may require elaborate CEQA/permitting process.
1
Tools in Place
Notes
Score
Entry
Prohibitions have been publicized and enforced by DFG.
3
Control
DFG eradication in Lake Davis costs over 2007 $16M.
3
Outreach
Despite high CA public awareness, several CA sport fisher groups have presented much resistence. The Lake Davis appears to be a purposeful, illegal, introduction.
