PERMFILE139144

• Permit No: C1980001
• IBM Index Class Name: Permit File
• Doc Date: 1/8/2007
• Section_Exhibit Name: 2.7 Fish and Wildlife
• Media Type: D
• Archive: No

type for each sampling session. Morning transects were summarized separately from
evening transects. These compilations summarize The total number of each individual
species observed and the total number of observations for all species during the
entire five day sampling period. Species diversity was calculated for each transect
during each sampling session. Diversity was calculated by Shannon-Wiener's formula
(Whittaker 1975).
An index of similarity (Colwell and Futuyma 1971) was also calculated between
transects in different habitat types for each sampling session.
Abundance was calculated from the flushing transect data as the total number
of individuals observed divided by the distance traversed in k m. Perpendicular
sighting distances, described in Emlen (1971), were not used in calculations of
abundance because of the difficulty of estimating distance, particularly of flying
birds, and the problem created by different observability of various species.
In the calculation of abundance for morning transects, species that were seen
only on The evening transects were added to the morning transect data to arrive at
total abundance. Abundance of a particular species in a single habitat was obtained
by averaging abundance from the sampling sessions during which that species was
present. For example, May and July samples were averaged to obtain abundance for
summer residents.
Abundance of rodents from line-trapping was calculated as the total number
caught divided by the number of trap nights and converted to number/100 trap nights.
Grid trapping yielded density estimates which were calculated as The total number
of rodents caught divided by the area covered by the grid.
Aquatic Biology
Four study locations (stations) were selected on Trout Creek and two stations
on Oak Creek to evaluate the fisheries resource in the vicinity of the Edna Mine
(Exhibit 2.7-10). Each station was selected so os to be representative of the stream
in that area, Taking into consideration cover, pool-riffle ratio, shading, and general
habitat features. Station lengths varied between 83-113 meters (283-370 feet).
Fish were sampled in the summer and fall seasons at each station using
backpack electrofishing gear. At least two sampling passes were made Through each
station each season, with upstream and downstream ends first blocked off by nets.
. Benthic invertebrates of Trout Creek and Oak Creek were collected by taking
three samples with a Surber square-foot bottom sampler. Collections were made in
2.7-73