Notice of Hearing on the Application to Use Sodium Fluoroacetate ...

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belgt,.,
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c,lc,hat it .:~ouid ce ; n the abs2nce <strong>of</strong> 3tich activity. Dr. Grandy
acknow? ebsed ;hd',
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frcn ;i 2: 3 sil;di 2s :;las i nzdequzte to Y-> -F.P~: ;
any proper jtacijtic~! analysis or cz!nci~sicn;.
A 3-year study <strong>of</strong> five ranches in southern Wycming resulted in
predation being confirmed as causing loss <strong>of</strong> 1.5 percent <strong>of</strong> lambs
docked in 1973, 2.1 percent in 1974 and 3.2 percent in 1975.
Corrospondi ng confi med ?,.re ? osses to predators were 0.2 per-cznt
<strong>of</strong> the inventory in each <strong>of</strong> the three years which is to be
compared with 1974 losses reported by Gee <strong>of</strong> 11.7 ?ercsc <strong>of</strong> tke
lambs born and 3.5 percent losses cf ewes. A study <strong>of</strong> 3 bands <strong>of</strong>
sheep in Idaho r2poced coniimed predation loss <strong>of</strong> lambs ta be
1.3 percsnr <strong>of</strong> 1 ambs born in 1973, 1.7 percent in 1974 and 1 . 2 Jercznc
in 1975. Ewe loss2s as a ;2rc:nt <strong>of</strong> tcxal ewe i nvencory derz 1.6
perc~nt in 1373, 0.7 percent in 19id and 0.3 percenc in 1975. An
"adjust~d" predator 1 oss rate ,das detemi zed by applyi ng the ?erc?nt,Age
verified predation losses bore to total losses and appiying This
percentage to missing animals. This resulted in lamb losses being
3.1 percent <strong>of</strong> 1 ambs born in 19i3, 3 -3 percent in 197c and 1 .3 percent
in 1975. Adjusted ewe losses were 2.3 percent, i.3 percznt and 0.8
percent, respectively, for each <strong>of</strong> the three years. These loss
ratss are to be compared with a predation :ass rat? for Idaho <strong>of</strong>
5.8 percent <strong>of</strong> lambs and 2.0 percent <strong>of</strong> sheep in 1974 reported by
Gee, 2t a7 .
34. A study <strong>of</strong> 10 large sheep operations in Utah resulted in reported
ccnf i rm~d 1 ;.ma ; gases ~ L I pre;;ato?s- <strong>of</strong>-? .7 pe?ccerr*, <strong>of</strong> lambs docked- i r,
1972, 1.5 percent in 1973, 2.6 percent in 1974 and 2 percent in 1975.