Originally Posted by
Fenelon
I highly doubt that Scugog will ever again support a quality Walleye fishery like it did in the past. The nail was first tapped into the coffin when zebra mussels entered the Kawarthas in the eighties. It quickly changed the entire primary productivity and trophic status of the lake. The Secchi disk reading (light penetration/water transparency) tripled in less than a decade as they effectively filtered the phytoplankton out of the lake. Scugog is a puddle, so now you have light penetration right to the bottom. Bad news for Walleye that prefer turbid habitat. Good news for anything that's a sight feeder. Then the nail got tapped in another inch when spiny water flea arrived. The entire primary productivity of the lake again dropped as this new invasive zooplankter efficiently predated our native zooplankton . If like many of the other studied Kawartha Lakes, they were so effective that many of the key native cladocerans, copepods, etc are now totally absent. This was the base rung on your food chain for just about everything that swims in the lake. Give it a few harder taps when Bluegill arrived, adding another competitor to the food chain. The final, and arguably the biggest, nail drive occurred when Black Crappie invaded. To give you an idea how substantial this is, all you have to do is look at the OMNR spring/early summer trap netting data starting in the early 90's. The density is now so high they were getting something like 4200 crappie per lift in a six foot NSCIN trap net!! Almost hard to envision. Imagine the direct competition all all life stages now for anything swimming in the lake. Better still, imagine the level of predation that occurs with a crappie density like that. Regardless of spawning success, with a crappie density like this you'll be lucky to get any walleye recruitment. A newly hatched walleye fry would probably have a better chance at the Lotto 649 versus beating the odds and surviving predation to age one. Add to this 15 years of unregulated angling when the writing was on the wall and the fishery was in decline. No wonder the MNR couldn't catch hardly a single Walleye the last time they did BSM (Broad Scale Monitoring) gill netting on the lake. In hindsight, poor lake Scugog had it's fate sealed when the first set of Trent Severn navigational locks were built in Bobcaygeon (something like 1829). Maybe she'll now be known as a world class crappie destination!