Photo: Ben McCauley
Acerca of
Invasive species
Five aquatic invasive alien species (EAEE) are found in the Brome Lake watershed, namely the rusty crayfish (Orconectes rusticus) as a wildlife representative, the Eurasian watermilfoil (Myriophyllum spicatum), the common reed (Phragmites australis ), the curly pondweed (Potamogeton crispus) and the frogbit (Hydrocharis morsus-ranae) as representatives of the flora. Introduced in a new region, outside their natural environment, the EAEE have no natural predator which allows them to grow rapidly. Once established, they can take the place of native species.
Fauna
Rusty Crayfish
The rusty crayfish is an invasive alien species native to the Ohio River watershed in the United States. It was observed for the first time at Brome Lake in 2011 during an ichthyological inventory. This species of crayfish is very voracious and is larger than native crayfish. Its carapace is usually blue-gray or dark brown-green and it has red spots on the side of its carapace. It feeds on fish eggs, periphyton and benthic invertebrates.
Photo: Conservation Brome Lake
Are you capturing
crayfish?
If so, help us
to control them by answering to
3 short questions.
Conservation Lac Brome and the Ministry of the Environment, the Fight Against Climate Change, Wildlife, and Parks want to follow the evolution of the Brome Lake invasive crayfish population. To do this, we would like to be informed of crayfish captures. Please answer the following questions to help us control the species.
We remind you that it is forbidden to put the crayfish back into the water once captured and that it is also forbidden to transport the crayfish alive after the capture.
We are currently working on producing a video capsule that will allow you to fully understand the stages of catching crayfish.
Questionnaire
Flora
Eurasian watermilfoil
Eurasian watermilfoil is an invasive alien plant species. This rooted plant has a stem surrounded by leaflets that look a bit like conifer thorns. It spreads rapidly by cuttings when a fragment is cut. Watermilfoil, which can reach 6 m in height, forms dense canopies on the surface, which interferes with recreational activities and the development of native aquatic plants.
