Flashcards in Great Lakes Deck (25):
What seaway permits the passage of deep water ships between the Great Lakes and the Atlantic Ocean?
St. Lawerence River
Name some important Great Lake industries:
Transportation, iron, steel, petroleum, grain, trade
About how many species of fish can be found in the Great Lakes?
At 82,000 sq km (31,698 sq mi), what lake has the highest area?
What is the largest fresh water lake completely within the USA?
Which lake in the Great Lakes does not freeze in the winter?
What has brought upon deliberate as well as unintentional changes in the Great Lakes?
What species contributed to the collapse of native fish populations in the 1950 and 1960?
What species have largely replaced the native forage fish?
Alewife and smelt
What invertebrate invaders led the dramatic change in the base of the food web supporting the fishery and the physical habitat of the lake bottom and coastal zone?
What describes the saturation values of a gas?
Decreasing the temperature increases the saturation value
What is an unintended consequence of releasing ballast water?
Release of invasive species
Intentional introduction of fishes was historically a leading cause of many invasive species. T or F?
Aquatic Invasive Species
Hazard Analysis and Critical Control Point
What does the term bioaccumulate mean?
Fish take in chemicals found in the water that remain in there system at concentrations much higher than in the actual water
What is Freddy the Fish?
A campaign used to make people aware of how to correctly prepare fish to minimize PCB intake.
In 2003 how much money did Great Lake Anglers spend on fishing trips and equipment?
How many pounds of fish does commercial fishing in the great lakes produce each year?
Since when has the diporeia population started to decline?
United States Geological Survey
What is the value of the Great Lakes recreational fishing?
Eighty-seven percent of fish producers experience loss from what?
Bacterial Kidney Disease