Recreation

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Asian carp of all types have white, firm, mild flesh, which is excellent table fare, but all Asian carp also have intramuscular bones in the filets that many people find undesirable. Asian carp feed low on the food web, are fast growing, are low in fat...
Many studies show that bighead and silver carp substantially change ecosystems where they have been introduced. Studies around the world, including a USGS study in the Missouri River, found that zooplankton populations are dramatically reduced when Asian...
At the head of the valley in Yosemite National Park, as if on a pedestal, stands Half Dome, the most colossal and recognizable rock monument in the Sierra Nevada, smoothly rounded on three sides and a sheer vertical face on the fourth. From its summit,...
An exponential increase in the population numbers of bighead and silver carp began in the mid-90s and continued through the mid-2000s in parts of the Mississippi and Illinois rivers. The Illinois Natural History Survey has estimated that a population of...
Both bighead and silver carp become fairly large; records of both species approach 100 pounds, but silver carp over 20 pounds and bighead carp over 30 pounds are uncommon. The North American record for bighead carp is a 106-pound fish from Missouri. Both...
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US Topo maps (and also the maps of the Historical Topographic Map Collection) can be downloaded free of charge from three applications: 1) The "Map Locator and Downloader" application at the USGS Store website.2) The National Map Viewer3) A text query...
Instructions for downloading from The National Map Viewer are located in a Download and Cart user guide. Orthoimagery is downloaded with the following steps: Zoom to area of interest. Click on Download Data tool. Draw a bounding box; choose a reference...
Select the Print icon in the upper right-hand corner. You can save and print a map either in PDF, JPEG, or PNG formats. PDF allows the user to include map elements in the header, such as a title and notes. JPEG and PNG only allow the map to be printed.