Water replacements and their significance to a fishery 73 



industrial developments. Of a different nature are the possible changes in ihc 

 environment of Georges Bay, between Cape Breton and the Nova Scotia mainland, 

 which may follow from the completion of the Canso Causeway. By cutting off the 

 interchange between Gulf waters and those of the open Atlantic through Canso 

 Strait, the strong possibility exists that the waters of Georges Bay will be warmer than 

 heretofore. Slight upward changes in the water temperatures in this area may be 

 sufficient to exert some influence on the lobster populations, and to bring about a 

 southward extension of the oyster populations of neighbouring areas. 



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