Melville, G. E. Saskatchewan Research Council,
, . E. ,

The objective of this study is to assess our ability to determine yields for cold-water fish, specifically lake trout in the MacKenzie Great Lakes, as affected by a changing climate. For the most part, Lakes Athabasca and Great Bear are compared to Great Slave Lake because it is the only one where there is data for all of the subject areas. Using the example of the East Arm, Great Slave Lake, the primary predictor of water-column temperature regimes is the average mean daily temperature over an extended previous period. The actual thermal habitats of lake trout in the MacKenzie Great Lakes are substantially lower than the optimal range indicated in the literature. The generally accepted 15-year running average annual catch does not represent an estimate of stable maximum catch, or sustained yield, for Great Slave Lake. On the whole, we are very limited in our ability to forecast the potential effects of climate change on sustained yields of cold-water fish, in this case lake trout in the MacKenzie Great Lakes. There are too many knowledge gaps in fisheries ecology for us to be attempting to predict such yields, climate change or not, without a substantial amount of further research.
Day: Friday, Feb. 5
Time: 02:30 - 02:45pm
Location: Eldorado Hotel
Code: SS48FR0245E