Fish Habitat of the Tay River Watershed: Existing Conditions and Opportunities for Enhancement Completed by



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Lake / Watercourse

and Designation

Fish Community Objective

Issue

Existing Fish Habitat Conditions


Fish Habitat Enhancement Opportunities

Bobs Lake –

Green Bay (T3)


Cold Water

Continued


Cold Water with top predators (particularly lake trout, smallmouth bass, and northern pike)

Management focused on rebuilding lake trout population through stocking of 25 000 yearling lake trout per year

Other populations are natural and self-sustaining


Critical Fish Habitat

Lake Trout- currently no known spawning shoals exist, seven shoals demonstrate suitable spawning habitat (Figure 2.3.1)

These shoals are also used by lake whitefish and cisco


Walleye- currently no known walleye spawning areas exist in Green Bay, however the potential lake trout shoals (above) may double as walleye spawning habitat
Smallmouth Bass- twelve bass spawning locations are located in near shore areas around Green Bay

(Figure 2.3.1)

Northern Pike- two large spawning and nursery areas are located on the east shore of Green Bay (Figure 2.3.1)


All seven potential lake trout spawning shoals have enhancement potential. Of particular interest are the small islands in Green Bay
Enhancement of these shoals will also supply increased spawning habitat for walleye, lake whitefish,

and cisco

Smallmouth Bass spawning (nesting) and rearing areas should be strictly protected from development in or near water, and early summer angling pressure
Northern Pike spawning and nursery areas require protection from near shore development and water level manipulations



Lake / Watercourse

and Designation

Fish Community Objective

Issue

Existing Fish Habitat Conditions


Fish Habitat Enhancement Opportunities

(T3) Bobs Lake –Buck Bay, Crow Bay, East Basin, Long Bay, Mill Bay, Mud Bay, West Basin

Cool to Warm Water


Cool to warm water with top predators such as walleye, smallmouth bass, largemouth bass, and northern pike

All populations are natural and self-sustaining



Water Quality

Trophic State- eutrophic conditions exist in Mill and Mud Bays

Buck, Crow, Long Bays and the East and West Basins classed as mesotrophic

Overall trends show increasing Secchi disk readings and decreasing nutrient measurements, indicating improving water quality


Encourage practices that reduce sediment and nutrient inputs (ie. restoration of riparian vegetation, restrict cattle access to water, etc.)
Potential shoreline rehabilitation projects exist in numerous locations around the lake (Figure 2.3.2, 2.3.3, 2.3.4)
Three major areas of livestock access to water exist. One located at the southern portion of Mill Bay, one at Long Bay at Thompson’s Creek and the other at the outlet of the lake (Figure 2.3.2, 2.3.3, 2.3.4)


Water Levels



Spawning and rearing habitats for walleye, northern pike, and bass may be currently damaged through inappropriately coordinated water level manipulation



OMNR, PC-Rideau Canal, and The Greater Bob & Crow Lakes Association should work in partnership to maintain appropriate water levels to aid in the protection of critical spawning habitat (ie. timing schedules around spawning and rearing periods, spring and fall)





Lake / Watercourse

and Designation

Fish Community Objective

Issue

Existing Fish Habitat Conditions


Fish Habitat Enhancement Opportunities

(T3) Bobs Lake –Buck Bay, Crow Bay, East Basin, Long Bay, Mill Bay, Mud Bay, West Basin

Cool to Warm Water


Cool to warm water with top predatory species such as walleye, smallmouth bass, largemouth bass, and northern pike.

All populations are natural and self-sustaining



Critical Fish Habitat

Walleye- major walleye spawning shoals are located in the West Basin in Fish Creek, Eagle Creek, Bobs/Crow Lake Channel, around islands in the narrows, and several shoreline areas within and at the mouth of Crow Bay (Figure 2.3.2, 2.3.3, 2.3.4)

Previous walleye spawning bed enhancements have been conducted on the northeastern shore Bobs/Crow Lake channel


Bass- spawning and rearing locations are found throughout the lake, usually in small and isolated bays near shore (Figure 2.3.2, 2.3.3, 2.3.4)
Northern Pike- spawning and nursery habitats exist in several shallow (often flooded) marshy regions of the lake, major sites are found in Buck, Mill, Mud, and Long Bays (Figure 2.3.2, 2.3.3, 2.3.4)

Enhancement opportunities exist on: the western shore of the Bobs/Crow channel, the Portage Cut, Thompson’s Creek, and Fish Creek
Many walleye spawning shoals are near cottage shoreline property and cottagers should be made aware of the importance of maintaining these areas.

Bass spawning (nesting) and rearing areas should be protected from development in or near water, and early summer angling pressure. Anglers should be made aware of illegal Spring angling pressure during bass spawning.

Northern Pike spawning and nursery areas require protection from near shore development and water level manipulations




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