. The Canadian field-naturalist. Natural history; Sciences naturelles. ° ° ° ° °W' Figure 4. Distribution of Lake Sturgeon locations in Rainy Lake during September and October 2003 and September 2004. movement rate of km/day observed by Knights et al. (2002) for Lake Sturgeon in the upper Missis- sippi River system. Lake Sturgeon in Rainy Lake Uke- ly were dispersing into the lake away from spawning sites during the post-spawn period in June. However, movement rate patterns were dissimilar for the same months between years. Further research thus will be
. The Canadian field-naturalist. Natural history; Sciences naturelles. ° ° ° ° °W' Figure 4. Distribution of Lake Sturgeon locations in Rainy Lake during September and October 2003 and September 2004. movement rate of km/day observed by Knights et al. (2002) for Lake Sturgeon in the upper Missis- sippi River system. Lake Sturgeon in Rainy Lake Uke- ly were dispersing into the lake away from spawning sites during the post-spawn period in June. However, movement rate patterns were dissimilar for the same months between years. Further research thus will be needed to ascertain seasonal movement patterns and explanations for those patterns. Movement of fish between the Seine River and the main body of the South Arm did occur but was mini- mal throughout the study. Rusak and Mosindy (1997) found that in the Lake of the Woods/Rainy River sys- tem, there was a separation in the population based primarily on winter habitat use. "River" fish spawned in the Rainy River and remained there throughout the winter months. "Lake" fish spawned in the Rainy River but moved into the main basin of Lake of the Woods during the winter months. If a similar dichotomy exists in the Rainy Lake/Seine River population, there may be greater movement of Lake Sturgeon between these two areas during the time period in which we did not attempt to locate fish ( late fall and winter). Thus. Lake Sturgeon may move from Rainy Lake into the Seine River during this time period, but further inves- tigation will be needed. Movement patterns varied for individual Lake Stur- geon in Rainy Lake. Some fish did not exhibit dis- cemable movement patterns, such as fish 21. which was located throughout the east end of the South .Arm from Stokes Bay to the Brule Narrows and also in Seine Bay and at the mouth of Seine Bay (Figure 6). Locations in 2003 began in the east and moved west with the last location east of the Brule Narrows. The first locat
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