Spring Breeding Surveys Ruffed Grouse Drumming Survey Ruffed grouse drumming counts were conducted statewide from 105 survey routes during April and May 2014.
Significant weather conditions during the survey periods delayed couple route regionally
There was an average of 12.43 drums heard per routes statewide, a 16% increase from 2013 (10.77) average (Figure 8). Highest drumming counts were in Zone 1(Upper Peninsula; 14.86), following Zone 2 (Northern Lower Peninsula; 11.64) and Zone 3 (Southern Lower Peninsula; 4.14)
ground Survey Results of Michigan Woodcock singing - ground survey were based on preliminary analysis of data from 95 survey routes (Cooper and Rau 2014). There was significant changes in the woodcock index for Michigan in 2013 and 2014 were detected. An average of 5.43 and 5.20 singing males were heard per route in 2013 and 2014, respectively.
The 2013 Central Region index, consisting of information from Illinois, Indiana, Manitoba, Michigan, Minnesota, Ohio, Ontario and Wisconsin, was significantly different from 2013 (n=408
, P<0.05). In the Central Region, there was an average of 2.70 and 2.57 singing males heard per route in 2013 and 2014, respectively (Cooper and Rau 2014).
Significant declines in the number of singing males were detected in Michigan and Central Region during 2014 - 2014. This is the first time in three years that the trend has shown a decline in the
Central Region (Cooper and Rau 2014). Michigan and the Central Region have experienced an average Long - term decline of 0.77% and 0.90% per year, respectively, since 1968 (P<0.05; Cooper
and Rau 2014).
Post a Comment