Special Scientific Report--Wildlife 166
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In our eReader you can find the full English version of the book. Read Special Scientific Report--Wildlife 166 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Special Scientific Report--Wildlife 166
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The San Luis Valley, Colorado's most important duck breeding area, continued in a dry cycle which began in 1971. The run off from the snow pack in the mountains surrounding North Park produced only fair water conditions. Marshes and drainage basins in the Cache la Poudre and South Platte River Valleys were dry and river flows extremely low. Low water along the rivers in northern Colorado was detrimental to duck nesting, but did insure that island- nesting Canada geese would not be threatened by... flooding.
Breeding populations and production (tables B.-57 through B-60) The reduction in the number of breeding pairs in Colorado's two major breeding areas, the San Luis Valley and North Park, resulted in the smallest breeding pair total recorded for the State since 1964.
The 47,300 breeding pairs are nearly 20 percent below the long-term average. Only in the Cache la Poudre Valley were more breeding pairs observed in 1972 than in 1971.
The mallard, although recording a decrease in total numbers from its 1971 level, increased in terms of the composition of the total breeding population.
What to read after Special Scientific Report--Wildlife 166?
You can find similar books in the "Read Also" column, or choose other free books by U.S. Fish And Wildlife Service to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The San Luis Valley, Colorado's most important duck breeding area, continued in a dry cycle which began in 1971. The run off from the snow pack in the mountains surrounding North Park produced only fair water conditions. Marshes and drainage basins in the Cache la Poudre and South Platte River Valleys were dry and river flows extremely low. Low water along the rivers in northern Colorado was detrimental to duck nesting, but did insure that island- nesting Canada geese would not be threatened by... flooding.
Breeding populations and production (tables B.-57 through B-60) The reduction in the number of breeding pairs in Colorado's two major breeding areas, the San Luis Valley and North Park, resulted in the smallest breeding pair total recorded for the State since 1964.
The 47,300 breeding pairs are nearly 20 percent below the long-term average. Only in the Cache la Poudre Valley were more breeding pairs observed in 1972 than in 1971.
The mallard, although recording a decrease in total numbers from its 1971 level, increased in terms of the composition of the total breeding population.
What to read after Special Scientific Report--Wildlife 166?
You can find similar books in the "Read Also" column, or choose other free books by U.S. Fish And Wildlife Service to read onlineMoreLess
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