CONTEXT
What are the main aquatic invasive species ?
Zebra/quagga mussels
The zebra mussel is a small freshwater mollusk. Its size varies between 0.5 and 5 cm in length. The success of the zebra mussel is due, among other things, to its productivity and its mode of propagation. Indeed, each adult female can lay from 30 000 to 1 000 000 eggs annually.
Eurasian watermilfoil
Eurasian watermilfoil grows in lakes, ponds, swamps, canals, and in the calm sections of rivers and streams. Large colonies of Eurasian watermilfoil can interfere with recreational activities such as boating, fishing and swimming.
Spiny water flea
The spiny water flea is a member of the large family of zooplankton. It is approximately 1 to 1.5 cm long and its tail occupies more than half its size. This tail, right or slightly curved, is strewn with spines on the length.
Zebra/quagga mussels
The zebra mussel is a small freshwater mollusk. Its size varies between 0.5 and 5 cm in length. The success of the zebra mussel is due, among other things, to its productivity and its mode of propagation. Indeed, each adult female can lay from 30 000 to 1 000 000 eggs annually.
Eurasian watermilfoil
Eurasian watermilfoil grows in lakes, ponds, swamps, canals, and in the calm sections of rivers and streams. Large colonies of Eurasian watermilfoil can interfere with recreational activities such as boating, fishing and swimming.
Spiny water flea
The spiny water flea is a member of the large family of zooplankton. It is approximately 1 to 1.5 cm long and its tail occupies more than half its size. This tail, right or slightly curved, is strewn with spines on the length.
THEIR IMPACTS
Environmental
Aquatic invasive species contribute to the loss of biodiversity as they:
- Hunt other species (predation)
- Compete with other species for food and space
- Live on or in an organism (parasitism)
In addition, these species contribute to the eutrophication and the proliferation of cyanobacteria such as blue-green algae.
Economical
Aquatic invasive species cause significant economic costs as they:
- Decrease property values of riparian properties up to 20%
- Decrease revenues from tourism, fishing and aquaculture
- Block water lines
- Require costly control, monitoring and eradication measures
$1 INVESTED IN PREVENTION CAN AVOID COSTS OF $100 FOLLOWING AN INTRODUCTION
Socio-recreational
Aquatic invasive species interfere with recreational activities, such as:
- Fishing
- Swimming
- Boating
- Water sports
THEIR PROPAGATION
The most important propagation vectors
90% OF THE SPREAD IS CAUSED BY RECREATIONAL BOATS