6.4 Threat: Invasive fish
p. 350-353
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6.4.1 Brown and black bullheads
Based on the collated evidence, what is the current assessment of the effectiveness of interventions for controlling brown and black bullheads?
Beneficial | ● Application of a biocide |
Likely to be beneficial | ● Netting |
No evidence found (no assessment) | ● Biological control of beneficial species |
Beneficial
Application of a biocide
1Two studies in the UK and USA found that rotenone successfully eradicated black bullhead. Assessment: beneficial (effectiveness 80%; certainty 80%).
http://www.conservationevidence.com/actions/1050
Likely to be beneficial
Netting
2A replicated study in a nature reserve in Belgium found that double fyke nets could be used to significantly reduce the population of large brown bullheads. Assessment: likely to be beneficial (effectiveness 55%; certainty 55%).
http://www.conservationevidence.com/actions/1051
No evidence found (no assessment)
3We have captured no evidence for the following interventions:
Biological control of beneficial species
Biological control using native predators
Changing salinity
Changing pH
Draining invaded waterbodies
Electrofishing
Habitat manipulation
Increasing carbon dioxide concentrations
Public education
Trapping using sound or pheromonal lures
Using a combination of netting and electrofishing
UV radiation
6.4.2 Ponto-Caspian gobies
Based on the collated evidence, what is the current assessment of the effectiveness of interventions for controlling Ponto-Caspian gobies?
Beneficial | ● Changing salinity |
Likely to be beneficial | ● Use of barriers to prevent migration |
No evidence found (no assessment) | ● Application of a biocide |
Beneficial
Changing salinity
4A replicated controlled laboratory study in Canada found 100% mortality of round gobies within 48 hours of exposure to water of 30% salinity. Assessment: beneficial (effectiveness 90%; certainty 75%).
http://www.conservationevidence.com/actions/1072
Likely to be beneficial
Use of barriers to prevent migration
5A controlled, replicated field study in the USA found that an electrical barrier prevented movement of round gobies across it, and that increasing electrical pulse duration and voltage increased the effectiveness of the barrier. Assessment: likely to be beneficial (effectiveness 50%; certainty 45%).
http://www.conservationevidence.com/actions/1074
No evidence found (no assessment)
6We have captured no evidence for the following interventions:
Application of a biocide
Biological control of beneficial species
Biological control using native predators
Changing pH
Draining invaded waterbodies
Electrofishing
Habitat manipulation
Increasing carbon dioxide concentrations
Netting
Public education
Trapping using visual, sound and pheromonal lures
Using a combination of netting and electrofishing
UV radiation
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