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<br />Page 43 <br /> <br />incomplete knowledge of each species' historical and current distribution, abundance, and life history <br /> <br /> <br /> <br />Three Species Management Units <br /> <br />- Basin Boundaries <br />- Subregion Boundaries <br />[=:J Hy<iologic Unit Bounda.ries <br />Major Rivers ' <br /> <br /> <br />Norlhern Regon <br />Norlheastem Region <br />Central Region <br />Southern Region <br />Southeastern Regon <br /> <br /> <br />Hydrologic Unit Codes <br /> <br />Division Regional Boundaries <br /> <br />Figure 3-1 State of Utah Hydrologic Unit Codes, Division of Wildlife Resources Regional Boundaries, and <br />Three Species Management Units. <br /> <br />information, in addition to their diverse population demographics and geographic occurrences. Thus, <br />an accurate assessment of appropriate population metrics has proven to be a difficult task. <br /> <br />To simplify most of these matters, we recognized several principles in developing conservation <br />objectives. First, this conservation plan, including the Annual Priorities document incorporating all <br />potential conservation actions, has been developed for each species individually with status reviews, <br />threat assessments, and conservation objectives that are specific to each 8-digit HUC, which is a <br />smaller area than the 4-digit HUC or management unit. The idea behind this is that though we will <br />manage the species based on the larger management units, we will implement activities on a smaller <br />scale. Next, assessment metrics and criteria with which to evaluate the overall effort were chosen <br />based on the number of populations and the size of those populations within each HUC (note: this <br />provision is supportive of elements of Objective 2 in the Range-wide Agreement, which requires <br />