Gambusia, Plague minnow, Mosquito fish at Melba, ACT
Identification history
| Gambusia holbrooki | 10 Apr 2020 | MichaelMulvaney | ||
| Gambusia holbrooki | 9 Apr 2020 | Walker | ||
| Gambusia holbrooki | 8 Apr 2020 | dhkmapr |
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User's notes
These sightings are evidence of rapid colonisation of the new stormwater treatment wetlands by Gambusia holbrooki – first noticed there on 29 March 2020. (Photo of captive specimen by Bron King).
The arrival of G holbrooki in less than a year after the commissioning of the wetlands illustrates its invasive potential.. The mode of its arrival is unclear. A possible route is via the wetland bypass drain which, when in flood, forms a continuous flow between the wetland intake and Ginninderra Creek (a distance of 180m). Supporting evidence is the continuing presence of G holbrooki in the bypass drain, 130m upstream from the creek. Contrary evidence is that G holbrooki has been seen only in wetland Pond 2. If it entered via the wetland intake, it would be expected also to colonise Pond 1, the settlement pond.
A plausible alternative is that G holbrooki was accidentally introduced to Pond 2 in water brought onto the site in tankers at the time of commissioning the wetlands.
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Nearby sightings
Location information
- Coordinates 149.053030-35.216810
- Places Melba, ACT
Sighting information
- 101 - 1,000 Abundance
- 7 Apr 2020 02:00 PM Recorded on
- dhkmapr Recorded by
Species information
- Gambusia holbrooki Scientific name
- Gambusia, Plague minnow, Mosquito fish Common name
- Not Sensitive
- Exotic
- Noxious or High Risk Weed or Pest
- Up to 2034.6m Recorded at altitude
- 51 images trained Machine learning
- External link More information
Record quality
- Images or audio
- More than one media file
- Confirmed by an expert moderator
- Nearby sighting(s) of same species
- GPS evidence of location
- Description
- Additional attributes
