View all Articles & Archives

Brought to you by SimcoeBoater.com Add to Technorati Favorites

Monday, September 04, 2006

Ontario's waterways under attack

Ontario's waterways under attack

Many inland waters, no less than the oceans, have suffered from environmental threats, often from invading species released by seagoing freighters in their ballast water.

In the Great Lakes alone, some 180 invasive species have established themselves. Here are a few of the invaders that have found haven in Ontario's waterways and what methods of control, if any, have been found.

Zebra mussels, native to the Black and Caspian Sea regions of Asia, are now widespread throughout the Great Lakes and in many smaller lakes of North America. They arrived in the mid 1980s, presumably in ballast water.

With few natural predators and a high reproductive rate, zebra mussels have clogged water intake pipes along lake shorelines, often cutting off factories, lakeshore homes and even boats from their water sources.

By filtering out phytoplankton, they have made lakes inhospitable for certain tiny species, especially Diporeia, a shrimp-like organism that is an important food source for whitefish, smelt, sculpin and young lake trout from various Great Lakes. As these fish have declined, so have the numbers of sport fish that prey on them, including salmon, trout and walleye.

Zebra mussels have squeezed out many native clam colonies. In their vast accumulation, they have also damaged navigational markers, fishing buoys, fishing nets, and boat hulls.

The zebra mussel does millions of dollars' worth of damage every year. Scientists have not had much luck eradicating them. The best recourse is to prevent their spread from one body of water to another.

The round goby is the most common invasive species in the Great Lakes, and is now spreading to other lakes, including, just recently, Lake Simcoe. It also was carried to the Great Lakes in ballast water from the Caspian region. Since they feast on zebra mussels, their initial growth in numbers was explosive. They frequently feed on the eggs of other fish such as smallmouth bass and wild perch, and those sports fish have declined significantly in number. The round goby are easily caught and, because of their small size, fishermen often take them for bait for use in other lakes, which contributes to their spread throughout the smaller lakes. Scientists have not found an effective control method.

Lamprey eels were introduced into the Great Lakes in the early 20th century through shipping canals. Lakes Michigan and Huron are the most badly effected. Sea lamprey fasten onto large fish with a sucking disk and feed on their bodily fluids. All fish species are attacked, including lake trout, salmon, rainbow trout, whitefish, walleye and sturgeon. The lake trout fishery in Lakes Huron and Superior used to yield seven million kilograms annually, but by the 1960s, that figure had fallen by 98 per cent, largely due to the sea lamprey.

Remediation in this case has been huge effective, with certain chemicals proving effective as lampricides. Sea lamprey numbers have been reduced by 90 per cent and some fisheries have rebounded nicely.

The European frog-bit, a plant that resembles a water lily, is found throughout Eastern Ontario wetlands and is spreading west.

17 Comments:

Blogger Dongdong Weng said...

20156.12dongdong
nhl jerseys
replica watches
cheap air max
lululemon
tory burch outlet
michael kors outlet
burberry scarf
oakley sunglasses outlet
toms outlet
coco chanel
hollister
louis vuitton
cheap nfl jerseys
michael kors
coach outlet
tods shoes
christian louboutin outlet
air max 90
michael kors outlet
michael kors
gucci outlet
true religion
rolex watches outlet
michael kors
toms outlet
chanel handbags
michael kors outlet
ray ban sunglasses
coach factory outlet
michael kors outlet

6:08 AM  
Blogger Unknown said...

mont blanc legend
replica watches
hollister outlet
cheap oakleys
gucci handbags
hollister clothing store
fitflop
fitflop
hollister kids
michael kors handbags
cheap ray bans
louis vuitton handbags
toms canada
michael kors outlet
air jordan 8
hollister clothing store
ray ban sunglasses
ray ban wayfarer
cheap toms shoes
true religion outlet
retro 11
concord 11s
oakley outlet
coach outlet online
concord 11
jordan 4 retro
longchamp
kate spade outlet
cheap jerseys wholesale
oakley sunglasses outlet
louis vuitton handbags
prada sunglasses
oakley sunglasses
burberry outlet
ray ban aviators
true religion jeans
20150715xiong

12:38 AM  
Blogger Xianjun Ranqin said...

qihang0909,coach outlet store online
nike blazers uk
tory burch shoes
jordan concords
coach outlet store online
michael kors uk
coach outlet store online
spy sunglasses
timberland uk
michael kors outlet
tommy hilfiger outlet stores
louis vuitton handbags
kobe bryant shoes for kids
discount oakley sunglasses
jordan 6
oakley vault
coach outlet
nike blazers
lebron james shoes 2015
air jordan 4
cheap ray bans
adidas superstars
nike trainers sale
louis vuitton handbags
louis vuitton outlet
coach factory outlet
louis vuitton outlet
fitflop shoes
longchamp sale
tory burch outlet
new jordans
kate spade sale
fake oakleys
q

8:50 PM  
Blogger ninest123 Ninest said...

ninest123 09.17
nike air max, gucci handbags, red bottom shoes, michael kors handbags, ugg boots clearance, michael kors outlet online, louis vuitton outlet online, polo ralph lauren outlet, louis vuitton, cheap oakley sunglasses, tory burch outlet online, burberry outlet online, ray ban outlet, louis vuitton handbags, louis vuitton outlet, longchamp outlet, prada handbags, ugg australia, michael kors outlet, replica watches, christian louboutin outlet, ugg outlet, christian louboutin, polo ralph lauren, louis vuitton outlet, cheap ugg boots outlet, oakley sunglasses, oakley vault, burberry outlet online, christian louboutin shoes, nike air max, tiffany jewelry, prada outlet, cheap ugg boots, michael kors outlet online sale, replica watches, nike free, michael kors outlet online, longchamp outlet online, longchamp handbags, tiffany and co, ray ban sunglasses, michael kors outlet store, nike outlet, jordan shoes

7:48 PM  
Blogger ninest123 Ninest said...

ninest123 09.17
nike air max, gucci handbags, red bottom shoes, michael kors handbags, ugg boots clearance, michael kors outlet online, louis vuitton outlet online, polo ralph lauren outlet, louis vuitton, cheap oakley sunglasses, tory burch outlet online, burberry outlet online, ray ban outlet, louis vuitton handbags, louis vuitton outlet, longchamp outlet, prada handbags, ugg australia, michael kors outlet, replica watches, christian louboutin outlet, ugg outlet, christian louboutin, polo ralph lauren, louis vuitton outlet, cheap ugg boots outlet, oakley sunglasses, oakley vault, burberry outlet online, christian louboutin shoes, nike air max, tiffany jewelry, prada outlet, cheap ugg boots, michael kors outlet online sale, replica watches, nike free, michael kors outlet online, longchamp outlet online, longchamp handbags, tiffany and co, ray ban sunglasses, michael kors outlet store, nike outlet, jordan shoes

7:48 PM  
Blogger ninest123 Ninest said...

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

7:52 PM  
Blogger ninest123 Ninest said...

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

7:54 PM  
Blogger ninest123 Ninest said...

air max, pandora uk, coach outlet, ugg soldes, replica watches, toms outlet, vans, ray ban, pandora jewelry, louis vuitton, converse, supra shoes, karen millen, hollister canada, marc jacobs handbags, louis vuitton pas cher, doke gabbana outlet, ugg boots, links of london uk, swarovski jewelry, ugg, iphone case, michael kors outlet, michael kors outlet online, thomas sabo uk, louis vuitton uk, timberland boots, pandora jewelry, juicy couture, uggs canada, converse shoes, louboutin, swarovski uk, oakley, sac lancel, montre femme, louis vuitton canada, abercrombie, ralph lauren, sac louis vuitton, gucci, michael kors handbags, juicy couture outlet, ugg, pandora charms, wedding dress
ninest123 09.17

7:57 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

3:49 AM  
Blogger Wenhao Guo said...

ray-ban sunglasses
michael kors handbags clearance
cheap oakley sunglasses
hollister,hollister canada,abercrombie and fitch,abercrombie,abercrombie fitch,abercrombie kids,a&f
michael kors handbags store
uggs on sale
michael kors outlet store
air jordan shoes
wellensteyn coats
coach outlet
north face outlet
ugg boots outlet
cleveland cavaliers
canada goose jackets
mbt sneakers
michael kors uk outlet
ugg boots on sale
louis vuitton outlet online
oklahoma city thunder
canada goose jackets
swarovski outlet
lacoste polo
michael kors handbags sale
lululemon outlet
nike running shoes
canada goose outlet
calvin klein,calvin klein outlet online,calvin klein wholesale,calvin klein shoes,calvin klein underwear,calvin klein coats,calvin klein handbags
ugg outlet
adidas jeremy scott
true religion sale
giuseppe zanotti sale
nba jerseys wholesale
ddddd1124

5:37 PM  
Blogger 艾丰 said...

jianbin1203
michael kors online outlet
wedding dresses
michael kors handbags
uggs on sale
ugg clearance
tods shoes
bottega veneta outlet online
uggs outlet
links of london uk
replica watches
nike shoes
arizona cardinals
mont blanc
lululemon outlet store
miami dolphins
basketball shoes
cleveland cavaliers
michael kors handbags,michael kors outlet,michael kors,kors outlet,michael kors outlet online,michael kors outlet online sale,michael kors handbags clearance,michael kors purses,michaelkors.com,michael kors bags,michael kors shoes,michaelkors,cheap michael kors
michael kors outlet online
salomon speedcross 3
abercrombie fitch
iphone cases
cheap oakley sunglasses
louis vuitton uk
nike huarache
woolrich clothing
celine outlet online
ralph lauren,ralph lauren uk,ralph lauren outlet,ralph lauren outlet online,polo ralph lauren outlet,ralph lauren polo
oakley outlet online
tory burch sandals
indianapolis colts
soccer jerseys,cheap soccer jerseys,cheap soccer jerseys for sale,soccer jersey,usa soccer jersey,football jerseys
ugg boots

5:38 PM  
Blogger Wenhao Guo said...

louis vuitton uk
oakley sunglasses wholesale
air jordan 13 free shipping
oakley sunglasses cheap
nhl jerseys wholesale
polo ralph lauren
cheap ray ban sunglasses
air force one shoes
michael kors handbags,michael kors outlet,michael kors outlet online,michael kors,kors outlet,michael kors outlet online sale,michael kors handbags clearance,michael kors purses,michaelkors.com,michael kors bags,michael kors shoes,michaelkors,cheap michael kors
ugg outlet
ugg outlet
michael kors handbags,michael kors outlet,michael kors outlet online,michael kors,kors outlet,michael kors outlet online sale,michael kors handbags clearance,michael kors purses,michaelkors.com,michael kors bags,michael kors shoes,michaelkors,cheap michael kors
lebron james shoes,lebron 12,lebron 12 shoes,lebron sneakers,lebron iv,lebron 11,lebron 10
true religion jeans,cheap true religion jeans,true religion jeans wholesale,true religion outlet,true religion sale,true religion outlet online
ugg outlet
ferragamo shoes
air jordan shoes
oakley
ugg outlet
coach outlet
michael kors outlet store
ddddd1208

11:43 PM  
Blogger Lin Shijun said...

kobe shoes
fitflops clearance
christian louboutin outlet
michael kors handbags
adidas tubular sale
chrome hearts online store
cheap oakley sunglasses
michael kors outlet online
cheap true religion jeans
louboutin shoes
tiffany and co outlet
Kanye West shoes
kobe basketball shoes
louis vuitton handbags
cheap basketball shoes
huarache shoes
oakley sunglasses
michael kors outlet
ray ban sunglasses outlet
michael kors handbags clearance
tiffany & co
http://www.michaeljordanshoes.us.com
oakley sunglasses
cheap air jordan
kobe sneakers
cheap air jordan
yeezy boost
tiffany and co
yeezy boost
adidas tubular runner

11:50 PM  
Blogger Lin Shijun said...

yeezy boost 350
adidas nmd
oakley sunglasses,oakley vault,oakley sunglasses cheap,oakleys,oakley.com,sunglasses outlet,cheap oakley
cheap rolex watches
yeezy boost 350
nike polo
cheap ralph lauren
adidas nmd
air jordan
nike huarache
nike air huarache
nike zoom running shoe
http://www.cheapairjordan.uk
michael kors purses
michael kors outlet store
adidas stan smith sneakers
air jordan retro
mlb jerseys wholesale
true religion jeans wholesale
adidas nmd runner
fitflops
http://www.airjordanretro.uk
cheap jordans
michael kors outlet online
nike huarache
cheap oakley sunglasses
adidas tubular
tiffany and co uk
nike air zoom
http://www.tiffanyand.co.uk
cheap nfl jerseys
michael kors handbags
http://www.yeezyboost350.uk
http://www.jordansforcheap.us.com
http://www.cheap-airjordans.us.com

11:53 PM  
Blogger mmjiaxin said...

roshe shoes
mlb jerseys wholesale
true religion sale
michael kors purses
michael kors outlet
michael kors handbags clearance
cheap oakley sunglasses
cheap basketball shoes
louis vuitton handbags
links of london outlet store
gg

7:49 PM  
Blogger raybanoutlet001 said...

polo ralph lauren outlet
omega watches
michael kors outlet
true religion jeans
ed hardy clothing
nike huarache
coach outlet
michael kors outlet
polo ralph lauren
ralph lauren

7:46 PM  
Blogger aaa kitty20101122 said...

kobe bryant shoes
yeezys
golden goose sneakers
lacoste outlet
michael kors factory outlet
http://www.kobeshoes.uk
pandora jewelry
longchamp handbags
burberry scarf
longchamp handbags

1:11 AM  

Post a Comment

<< Home