""The brook floater (Alasmidonta varicosa) is a freshwater mussel endemic to North America; within Canada, its distribution is currently restricted to 15 watersheds in New Brunswick and Nova Scotia. COSEWIC has assessed this species as Special concern. Populations of this native burrowing bivalve, like other unionids, continue to decline, mainly because of anthropogenic activities that affect habitat and water quality. Given the very limited species-specific data available, the current report does not attempt to quantitatively predict brook floater distribution or abundance; it outlines qualitative objectives to develop recovery or maintenance targets for the brook floater."--Document."
Canada. Department of Fisheries and Oceans. Gulf Region. Ecosystem Management Branch.
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