Waterfowl Breeding Population Survey: Southern Manitoba and Saskatchewan River Delta, May 2005.

摘要

The 2005 survey began with an aerial reconnaissance for waterfowl identification training and estimating habitat phenology on 5 May and continued through 6 May. In the authors estimation phonological conditions for the survey appeared late. This was referenced by several small flocks of mixed sex birds on larger water bodies. Inclement weather set in for 3 days and the aerial surveys did not begin until 10 May. By that time it was believed that the majority of waterfowl species were well distributed and on breeding territories. Waterfowl population estimates for strata 25, and 36 40 were 6.6% higher than 2004, -3.1% lower than the 10 year mean, and -10.2% lower than the Long Term Mean (LTM) from the surveys of 1955 through 2004. Total dabblers were 21.4% higher, 2.7% higher, and 6.8% lower than 2004, the 10 year mean, and the LTM, respectively. Diving ducks, on the other hand were -23.5% lower, -16.4% lower and -19.3% lower than the 2004, 10 year mean, and LTM, respectively. Overall pond numbers (strata 36 40) were estimated to be 39.7% higher than 2004, 18% higher than the 10 year mean and 12.5% higher than the LTM.