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WSPC04553
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Last modified
1/26/2010 11:40:00 AM
Creation date
10/9/2006 4:40:35 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8240.200.10.H
Description
Colorado River Threatened-Endangered - UCRBRIP - Program Organization-Mission - Stocking
State
CO
Basin
Colorado Mainstem
Water Division
5
Date
4/29/1996
Author
Tyus and Saunders
Title
Non-Native Fishes in Natural Ecosystems and a Strategic Plan for Control of Non-Natives in the Upper Colorado River Basin - 04-29-96
Water Supply Pro - Doc Type
Report/Study
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<br />U025,,7 <br /> <br />major questions posed for the next day. The handouts included information sheets to <br />serve as a focus for discussion and for mapping consensus on priorities. Each <br />participant reviewed the materials and marked rankings for those items for which he or <br />she had sufficient expertise. On the next day, participants were assigned to one of four <br />subgroups in which there was a mix of scientists, managers, and interested parties from <br />different parts of the basin. Each group reviewed individual responses to the handouts <br />and produced a single set of responses that was a distillation of group views. Where <br />consensus was easily achieved, a single ranking might be shown, but where group <br />members differed, a range of rankings might be shown. At the conclusion of the small <br />group discussions, the entire group assembled to review and comment on the small <br />group findings, <br /> <br />After the worksheets and priorities had been discussed, participants returned to <br />subgroups for developing control solutions that would address priority needs. Each <br />subgroup then presented control scenarios to the whole group and discussed <br />potentials and problems. <br /> <br />Workshop Results <br /> <br />The tangible products of the two-day workshop consist chiefly of a set of priorities <br />that focused attention on 1) the geographic areas where non natives imperil <br />endangered species, 2) which non natives pose the most serious threats, and 3) what <br />techniques were the most promising for control of the nonnatives. The list of priorities <br />was supported and explained by extensive notes recorded during discussions, and <br />transcriptions of the formal presentations (see Appendix for a brief synopsis of topics). <br />Results of the workshop provided guidance in developing the Strategic Plan (Section VI <br />of this document), but did not cover all areas addressed in the strategic plan, <br /> <br />GeoaraDhic priorities <br /> <br />The list of river reaches used in the workshop (Figure 2) is only one of the <br />possible classification systems. It reflects years of experience with the fishes and their <br />distributions, and conforms more or less to major geomorphologic features. A more <br />formal geomorphologic scheme is under development, but was not ready for use at the <br />workshop (Frank Pfeifer, USFWS, personal communication, 1996). The <br />correspondence between river reaches identified for the workshop and critical habitat <br />as defined by the USFWS (1994) is also shown in Figure 1. <br /> <br />The geographical distribution of life history stages (Table 2) was compiled prior to <br />the workshop (based chiefly on Tyus et al. 1982) and amended by participants based <br />on their experiences. Certain river reaches, for example the lower Yampa (Y1) and the <br />Green River from Split Mountain to Echo Park (G3 and G4), are important for most or <br />all life history stages of the three endangered species. Other river reaches (e.g., Y3, <br /> <br />26 <br />
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