View all Articles & Archives

Brought to you by SimcoeBoater.com Add to Technorati Favorites

Thursday, August 16, 2007

Mussels’ strength about to double

Mussels’ strength about to double
New threat arrives in Lake Simcoe


Zebra mussels have a new partner in crime in their invasion of Lake Simcoe. They’re called quagga mussels.

“You’ve got a double whammy now,” said Will Wegman from the Ministry of Natural Resources’ Aurora office, with zebras inhabiting the shallows and the quaggas taking up residence in the deeper areas.

Quagga mussels, a close cousin of zebra mussels, were first discovered in Lake Simcoe in 2004. Although similar in appearance, the quagga species are more oval-shaped as opposed to the D-shaped zebras.

Quagga mussels, first discovered at Port Colborne in Lake Erie in 1989, are commonly found at depths of 90 meet or more, on sandy or muddy bottoms, while zebras prefer rocky bottoms.

Like zebra mussels, quaggas efficiently filter water and can produce more than one million eggs per female each spawning season.
But the quaggas can reproduce at water temperatures a few degrees colder than what zebras prefer.

Zebra mussels are filter feeders and each one can process about one litre of water each day, sucking out plankton and other organic matter. This leaves the water cleaner, but it also robs other aquatic life of a food source, causing a trickle-down effect in the food chain.

Mussels negatively affect baby fish that also feed on microscopic organisms, but if some fish, such as smallmouth bass, can survive into adulthood, they can thrive, Wegman said. That’s because the water is clearer, and smallmouth bass rely on keen eyesight.

Anecdotal evidence from anglers suggests the overall size of smallmouth bass has increased in recent years. Fifteen years ago, a tournament winner could haul in the big prize with their five-fish entry weighing between 22 and 23 pounds, said Wegman, an avid angler. Today, a winner’s five-fish total will tip the scales at more than 25 pounds.

Less organic matter also allows sunlight to penetrate deeper into the water, beneficial to underwater plants and also resulting in increased water clarity.

“It’s one of those double-edged swords,” Wegman said. “There’s no question it’s clearing, not cleaning, up the lake. But it’s also totally changed the whole ecosystem.”

Lake Erie, so badly polluted that it was labelled as a “dead lake” in the 1960s, is now being compared to the vibrant hues of the Caribbean. Ironically, it’s the invasive zebra mussels, which entered the Great Lakes about two decades ago, that has created these increasingly clear waters, leaving many to believe that the lake was becoming cleaner and healthier.

But it’s all an illusion.

The jury’s still out on the effect of zebra mussels on Lake Simcoe.

“It’s hard to say whether it’s good or bad,” Wegman said. “It has changed the waters to an extent ... and now we have aquatic life where we didn’t have it before.”

Those areas include the northern portion of Cook’s Bay, the Virginia Basin near Sutton, and close to the shores of northern Lake Simcoe. Lake Simcoe covers about 725 square kilometres.

One thing is certain.

“They’re here to stay,” Wegman said of zebra mussels. “All the predators in the world won’t eliminate them.”

7 Comments:

Blogger ninest123 Ninest said...

ninest123 09.19
michael kors outlet, prada handbags, louis vuitton, replica watches, gucci outlet, louis vuitton, tiffany and co, prada outlet, michael kors outlet, michael kors outlet, jordan shoes, longchamp outlet, burberry, louboutin shoes, ray ban sunglasses, christian louboutin outlet, ugg boots, louis vuitton, polo ralph lauren outlet, uggs on sale, ugg boots, ugg boots, louis vuitton outlet, oakley sunglasses, nike air max, replica watches, tory burch outlet, michael kors outlet, ray ban sunglasses, longchamp, tiffany jewelry, oakley sunglasses, louis vuitton outlet, burberry outlet online, nike free, oakley sunglasses, longchamp outlet, nike air max, michael kors outlet, louboutin outlet, polo ralph lauren outlet, ugg boots, michael kors, nike outlet, louboutin

11:07 PM  
Blogger ninest123 Ninest said...

michael kors, coach outlet, air force, nike air max, ray ban pas cher, longchamp pas cher, michael kors, hermes, michael kors, true religion outlet, lacoste pas cher, kate spade outlet, timberland, north face, nike blazer, coach factory outlet, vanessa bruno, coach outlet, air jordan pas cher, air max, north face, oakley pas cher, new balance pas cher, nike roshe run, lululemon, ralph lauren pas cher, burberry, hogan, true religion jeans, hollister pas cher, coach purses, converse pas cher, kate spade handbags, nike free, true religion jeans, sac longchamp, vans pas cher, chanel handbags, hollister, true religion jeans, tn pas cher, ray ban uk, michael kors, sac guess, louboutin pas cher

11:09 PM  
Blogger ninest123 Ninest said...

ralph lauren uk, north face outlet, abercrombie and fitch, babyliss, giuseppe zanotti, asics running shoes, nike air max, longchamp, jimmy choo shoes, wedding dresses, nike air max, nike roshe, mac cosmetics, ferragamo shoes, mcm handbags, p90x workout, north face outlet, reebok shoes, hollister, soccer jerseys, mulberry, ghd, beats by dre, soccer shoes, insanity workout, birkin bag, nike trainers, nfl jerseys, bottega veneta, hollister, nike huarache, vans shoes, baseball bats, herve leger, lululemon, mont blanc, abercrombie and fitch, instyler, chi flat iron, nike free run uk, nike roshe, new balance, celine handbags, nike air max, valentino shoes

11:10 PM  
Blogger ninest123 Ninest said...

karen millen, pandora jewelry, iphone 6 cases, swarovski crystal, louis vuitton, hollister, toms shoes, oakley, pandora jewelry, coach outlet, louis vuitton, louis vuitton, ray ban, thomas sabo, marc jacobs, swarovski, michael kors outlet online, louboutin, bottes ugg, supra shoes, converse outlet, vans, sac louis vuitton pas cher, converse, doke gabbana outlet, michael kors outlet, wedding dresses, replica watches, louis vuitton, lancel, timberland boots, hollister, pandora charms, ugg boots uk, ugg,ugg australia,ugg italia, michael kors handbags, ugg pas cher, pandora charms, montre pas cher, juicy couture outlet, gucci, juicy couture outlet, nike air max, ralph lauren, links of london, ugg,uggs,uggs canada
ninest123 09.19

11:11 PM  
Blogger Atul Chandola said...

House Relocation Services Hyderabad
Bike Transportation Services hyderabad
Car Transportation Services hyderabad
International Packers and Movers Hyderabad
Cargo Services in Hyderabad

3:42 AM  
Blogger Atul Chandola said...

Packers and Movers India
Packers and Movers in Bangalore
Packers and Movers in Delhi
Packers and Movers in Hyderabad
Packers and Movers in Mumbai
Packers and Movers in Chennai
Packers and Movers in Pune
Packers and Movers in Noida
Packers and Movers in Gurgaon
Packers and Movers in Ghaziabad
Packers and Movers in Faridabad

3:42 AM  
Blogger Lin Shijun said...

hollister shirts
cheap ray ban sunglasses
omega outlet
moncler jackets
mulberry outlet,mulberry handbags outlet
tory burch sale
ray ban sunglasses
belstaff jackets
ugg boots
michael kors uk
burberry outlet online
snow boots
fitflops clearance
tiffany jewelry
louis vuitton bags
oakley sunglasses uk
fitflops clearance
ugg outlet
oakley sunglasses
burberry outlet store
louis vuitton outlet
mulberry bags
michael kors factory outlet
oakley sunglasses canada
woolrich outlet
fitflops uk
michael kors outlet uk
burberry outlet
michael kors uk outlet
mulberry handbags
cheap ugg boots
parajumpers coats
true religion outlet
ugg outlet
mulberry outlet
oakley sunglasses sale
ferragamo outlet
wellensteyn jackets

7:10 PM  

Post a Comment

<< Home