Environmental Science, 10th Edition (Cunningham)

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/8888888555/484165/google.jpg','popWin', 'width=210,height=178,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (34.0K)</a>

Take a virtual field trip with Google Earth!
Google Earth is a free, online application that uses satellite imagery to allow the user to zoom across the globe in a realistic, virtual environment. Downloading Google Earth is free at http://www.earth.google.com.

An overview manual is available by clicking here... Google Earth Overview (342.0K)

To continue:
- Make sure you have the Google Earth software installed and running.
- Copy the following latitude and longitude and paste into the "Fly to" field under the Search tab.
- Hit "Enter" for Google Earth to take you to the specified coordinates, then come back here and read the following overview.

Latitude/Longitude: -41.57, -73.0221

Overview: Fish Farm, Chile, p. 210

This location is another example of excess pesticide use. As ocean harvests of seafood decline because of overfishing and destructive harvest techniques, growing fish in ponds and net pens and cages has become an increasing source of food for human consumption. Currently, about half of all seafood consumed directly by humans comes from aquaculture operations. Chile is a major source of salmon and trout for the North American market. These offshore pens near Puerto Montt, Chile, are probably growing salmon. Growing fish in high concentrations requires use of pesticides and antibiotics to keep diseases and parasites under control. The feces and uneaten food that drain from the pens can pollute local waters and cause severe eutrophication in confined bays or small lakes. Fish (often exotic species or genetically engineered varieties) can also escape and invade local populations.

1			What is the white streak on the east side of the lower set of pens in this view?
			A)	The wake from the giant propeller that moves the fish pen around
			B)	The sewage outflow from the fish pen
			C)	Liquid from a hose used to administer antibiotics and pesticides to the water surrounding the fish pens
			D)	The wake of a motor boat, which has probably come to service the pens
			E)	The wake from a very large predator that is trying to eat the fish in the pen
2			How many other sets of fish pens can you find around this small island?
			A)	One other set
			B)	Two other sets
			C)	Three other sets
			D)	More than three other sets
			E)	No other sets exist around the island.
3			Is this salt or fresh water?
			A)	It is salt water.
			B)	It is fresh water.
			C)	It is both.
			D)	It is neither.
4			Why is the fish farm located here rather than out in the open ocean?
			A)	It is closer to the processing facilities.
			B)	The fish prefer it here.
			C)	This location is protected from storms, waves, and strong currents that could damage pens and free the captive fish.
			D)	There are fewer predators in this bay than in the ocean.
			E)	Harvesting the fish is easier here than in the open ocean.