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Bighorn Sheep Population Estimates
|Rocky Mountain Bighorn Sheep Polulation Estimares in the Ruby Mountains, Nevada|
|Year||Lambs||Yearlings||Ewe||Class I||Class II||Class III||Class IV||Total||Dates Counted||Time Frame|
|2006||unk||2||13||unk||unk||unk||1||unk||3 counts | Rams winter range not counted in 2006.||November 2006|
|2007||7||7||11||7||8||3||2||unk||5 counts | Rams winter range not counted in 2007.||November 2007|
|2008||10||12||21||5||8||7||3||66||Total of 20 counts||June 2008 thru May 2009|
|2009||0||5||10||0||1||1||0||17||Total of 10 counts as of June 2010.||October 2009 thru June 2010|
|2010||0||0||9||0||1||0||0||10||Total of 10 counts for the year 2011.||October 2010 thru February 2011|
This page is an accumulation of data gathered starting in 2006. It is an estimate of the Rocky Mountain Bighorn Sheep population that rut in Lamoille Canyon. It is my hope that this data can give insight into growth rates of different sexes and classes of sheep and help to understand how the herd ages.
Most of the study area is located in Lamoille Canyon 40° 40' North 115° 27' West, in the Ruby Mountains, North Eastern Nevada. Areas studied where the bighorn sheep rut area along with the ewe winter range and the ewe lambing range which are located in Lamoille Canyon. Other areas studied where the ram winter range.
How the counts were made:
In the rut of 2008 a system was devised that I feel gathered good sheep counts of Lamoille Canyon.
This system was made up of two parts.
CLASSIFICATIONS OF BIGHORN SHEEP:
In 2008 there where 12 yearlyings. These 12 yearlings would average 6 rams and 6 ewes. 3 rams in 2008 were harvested which leaves 3 rams. Figure a mortallity of one ram a year due to old age or slips, trips or falls and the total ram increase for 2008 equalls 2 rams.
Yearling Increase :
Percentage of Rams to Ewes:
In 2008 the Rams account for 55.3% of the herd that ruts in Lamoille Canyon (21 ewes and 26 rams). This coinsided with other studied herds of around 50:50 (Geist 1971)(MacCallum 1991) (Feder 2007).