Aquatic Species at Risk, Mapleleaf (Quadrula quadrula)

Aquatic Species at Risk, Mapleleaf (Quadrula quadrula)

SARA Status: Threatened (MB) Special concern (ON)

Several horizontal sections on this infographic show the following:

The logo for DFO in the top left corner of the infographic

Two illustrations of the Mapleleaf (Quadrula quadrula), with the first showing the following aspects labelled:

• inside of the shell (nacre) is pearly white
• raised part of the shell (beak) is small and slightly raised above hinge line

The second illustration shows the following aspect labelled:

• two rows of raised bumps form a v-shape along the outside of the shell
• adults are mostly brown, juveniles are a yellowish-green

The next section lists threats, including:

• habitat degradation
• sediment and nutrient loading
• invasive species
• contaminants

A further section notes that Saskatchewan – Nelson populations are located in Manitoba along the Red River and lower reaches of its tributaries, the Assiniboine River and Lake Winnipeg.

To the right of the infographic, a map of Manitoba shows, by an overlaying rectangle, where the related population is found. Another map on the right of the infographic shows a magnified view of where the population is found by use of splotch markings.

This section also notes that Great Lakes – Upper St. Lawrence populations are found in the Great Lakes – St. Lawrence River watershed in Ontario and appear confined to Lake Huron, Lake St. Clair, Lake Erie, and Lake Ontario tributaries, as well as coastal wetlands in Lake Erie and Lake Ontario.

To the left of the infographic, a map of Ontario shows, by an overlaying rectangle, where the related population is found. Another map on the left of the infographic shows a magnified view of where the population is found by use of splotch markings.

A final section on the infographic notes that activities in or near water can harm aquatic species, and lists what you can do:

• prevent contaminants from entering water
• report any invasive species sightings to DFO
• stay on designated trails; do not drive motorized vehicles in the water
• keep your shorelines natural
• protect sensitive habitat; contact DFO before doing any in-water work

Version 2023-07