Notice of permit

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Regional or Local Number: -CA SECT 73 SARA C&A 09-012

Notice is hereby given that pursuant to the provisions of section 73 of the Species at Risk Act permit no. -CA SECT 73 SARA C&A 09-012 is issued.

Activity necessary or beneficial to the species

The purpose of the project is to determine the sensitivity of the early life stages (glochidia) of endangered species of freshwater mussels to salt (NaCl and road salt).

Start Date: 2009-05-29   End Date: 2009-12-31

Issuing Authority: Department of Fisheries and Oceans

Authority Used:

  • Species at Risk Act

Location of Activity (province, territory or ocean):

  • Ontario

Affected Species:

a) Reasonable alternatives to the activity that would reduce impact on species The early life stage of freshwater mussels known as the glochidia, is know to be especially sensitive to waterborne contaminants. By working with the glochidia we can obtain adequate numbers for testing without harming the mature mussels. The chosen method of assessing the sensitivity the glochidia though acute toxicity has been widely accepted (American Standard Testing Method E2455-05) as a way of determining the lowest concentration of an environmental contaminant that could harm the species. An alternative option for determining the sensitivity of endangered mussel species to contaminants would be to use glochidia from another (common) species. To this end we employ a common species (Lampsilis siliquoidea) in the majority of our experiments and will only use the endangered glochidia on a very limited basis. Since our earlier studies have found that the glochidia from endangered species of mussels were significantly more sensitive to waterborne copper than the common species, it is necessary to determine if this is also the case with salt or chloride sensitivity. By gaining an understanding of the sensitivity of endangered species we can ensure that regulators will have the data necessary to develop water quality regulations which will protect even the most sensitive species. b) Feasible measures will be taken to minimize impact of activity on species or critical habitat or residence We collect only females of certain species and half of the glochidia are removed for experiments therefore allowing the female to release some glochidia naturally in the river. All mitigations measures known are being used to minimize potential impacts on the listed species. c) Activity will not jeopardize the survival or recovery of the species No. Our goal is ultimately to lead to the recovery of the species. By gaining an understanding of the glochidia’s susceptibility to contaminants we will contribute to long term protection of the mussels through environmental regulations.

Contact Person(s)
Melanie Toyne
Regional Manager, Species at Risk Program
Freshwater Institute, Ontario and Prairie Region, Fisheries and Oceans Canada
501 University Crescent
Winnipeg, MB
R3T 2N6

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