Table 4.2.1– . summer steelhead population spatial structure and diversity risk rating summary. Risk Assessment Scores Metric Metric Factor Mechanism Goal Population A.1.a L (1) L (1) Low Risk Low Risk A.1.b L (1) L (1) (Mean = 1.33) (Mean = 1.33) A.1.c VL (2) VL (2) B.1.a L (1) L (1) Low Risk (1) B.1.b L (1) L (1) B.1.c VL (2) VL (2) Low Risk B.2.a(1) VL (2) Low Risk B.2.a(2) M (0) (Mean = 0.75) M (0) Moderate Risk (0) B.2.a(3) VL (2) B.2.a(4) VL (2) B.3.a L (1) L (1) L (1) B.4.a L (1) L (1) L (1) Overall Viability Rating We are unable to assign an overall viability rating with any degree of confidence because there are no population-specific abundance and productivity data. Given the Low Risk rating for spatial structure and diversity and the assumption that this population has similar abundance and productivity as other subbasin steelhead populations, then this population would be rated as or VIABLE MAINTAINED. Spatial Structure/Diversity Risk Very Low Low Moderate High Very Low HV HV V M (<1%) Abundance/ Low V Productivity V V M (1-5%) ? Risk Moderate M M HR M (6 25%) ? –
Table 4.2.1– . summer steelhead population spatial structure and diversity risk rating summary. Metric Risk Assessment Scores Metric Factor Mechanism Goal Population A.1.a L (1) L (1) Low Risk (Mean = 1.33) Low Risk (Mean = 1.33) Low Risk A.1.b L (1) L (1) A.1.c VL (2) VL (2) B.1.a L (1) L (1) Low Risk (1) Low Risk (Mean = 0.75) B.1.b L (1) L (1) B.1.c VL (2) VL (2) B.2.a(1) VL (2) M (0) Moderate Risk (0) B.2.a(2) M (0) B.2.a(3) VL (2) B.2.a(4) VL (2) B.3.a L (1) L (1) L (1) B.4.a L (1) L (1) L (1) Overall Viability Rating We are unable to assign an overall viability rating with any degree of confidence because there are no population-specific abundance and productivity data. Given the Low Risk rating for spatial structure and diversity and the assumption that this population has similar abundance and productivity as other subbasin steelhead populations, then this population would be rated as VIABLE or MAINTAINED. Spatial Structure/Diversity Risk Very Low Low Moderate High Abundance/ Productivity Risk Very Low (<1%) HV HV V M Low (1-5%) V V ? V M Moderate (6 – 25%) M M ? M HR
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