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(Aythya valisineria)

Waterfowl Breeding Population and Habitat Survey in Western Canada and the Northwestern United-States

Additional information on: Waterfowl Breeding Population and Habitat Survey in Western Canada and the Northwestern United-States

Geographic area or population: Canadian Prairies

Graph showing the trend of the species through out the observed years
 
Listing of the individual data points that make up the graph
YearEstimated Population95% Lower confidence interval95% Upper confidence interval
1955399137278780.84519493.16
1956556795407719.24705870.76
1957511140335967.83686312.17
1958536410384713.13688106.87
1959198684143402.42253965.58
1960252027192731311323
1961239697147619.88331774.12
1962272540195484.47349595.53
1963226420164239.94288600.06
1964267999206307.69329690.31
1965309649231760.39387537.61
1966301564243119.12360008.88
1967310612246445.04374778.96
1968192602155043.68230160.32
1969250853191710.17309995.83
1970335015233666.34436363.66
1971310385227558.8393211.2
1972233938178645.9289230.1
1973317874195515.46440232.54
1974316382238717.06394046.94
1975409394340292.07478495.93
1976446136326484.31565787.69
1977379262283454.34475069.66
1978217498173316.95261679.05
1979383709288601.38478816.62
1980415165301036.6529293.4
1981225392169218.69281565.31
1982275153222130.98328175.02
1983295767235108356426
1984222514158087.59286940.41
1985220919177947.95263890.05
1986234764178780.74290747.26
1987274113133971.76414254.24
1988211250162991.74259508.26
1989151652117618185686
1990209424155792.65263055.35
1991232249.43142749.1321749.76
1992189451.77140957.56237945.98
1993171858.98112364.24231353.71
1994209935.47157920.21261950.72
1995434614.65329424.23539805.07
1996432959.19340198.05525720.33
1997412104.64329455.9494753.38
1998381963.31298656.46465270.16
1999380025.1305819.82454230.39
2000369051.39299480.91438621.87
2001320394.52239783.36401005.67
2002151007.63110605.42191409.84
2003306285.59246708.97365862.21
2004241145.82174561.31307730.32
2005252789.13192174.43313403.83
2006450446.47336090.02564802.92
2007528890.93386399.42671382.44
2008275794.19210792.28340796.1
2009380600288253.78472946.22
2010266310202720.64329899.36
2011435719364022.98507415.02
2012511071397288.47624853.53
2013497668414688.8580647.2
2014455669381243.69530094.31
2015422097353801.88490392.12
2016396201.89312990.84479412.94
2017435581.72354915.68516247.76

Notes on numeric data: Ex represents 10 to the power of x; For example 1.2345E-2 is equivalent to 0.012345