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Community Monitoring - Invasive Fish Species

Map of Mersey River watershed with sightings of invasive fish.
Chain pickerel (green dots) and smallmouth bass(red dots)
known distributions. Chain pickerel (black square) and
smallmouth bass(black dots) unconfirmed distributions. Mersey
River watershed outlined in red, Kejimkujik outlined in green.

Smallmouth Bass
(Micropterus dolomieui)
Jason Leblanc, NSDFA
Smallmouth bass were legally introduced in Nova Scotia in 1942, but have since then been illegally transferred in many locations and have migrated within watersheds. They often displace native species such as brook trout (speckled trout) or greatly reduce their productivity.

In partnership with the Mersey Tobeatic Research Institute, Environment Canada's Invasive Alien Species Partnership Program, Trout Nova Scotia, and others, CARP is educating people at fishing derbies, exhibitions, and at popular fishing spots.

Posters, signs, and presentations are all used to help raise awareness of the dangers of introducing invasive fish to the Mersey and Annapolis watersheds.

With the help of volunteer anglers, the distributions of invasive fish throughout the Annapolis and Mersey River watersheds have been documented in the maps below.

If you are interested in becoming a volunteer angler contact us.


Map of Annapolis River watershed with sightings of invasive fish. Chain pickerel (green dots) and smallmouth bass (red dots) known distributions. Chain pickerel (black square) and smallmouth bass (black dots) unconfirmed distributions. Annapolis River watershed outlined in red.
For further information, please visit the following links:

Mersey Tobeatic Research Institute (MTRI)

Trout: http://www.merseytobeatic.ca/projects/project_commonitoring_invasivefish_st.html
Smallmouth bass: http://www.merseytobeatic.ca/projects/project_commonitoring_invasivefish_smb.html
Chain pickerel: http://www.merseytobeatic.ca/projects/project_commonitoring_invasivefish_cp.html
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