Appendix 4. Risk Assessment Scores (note: VOPW= Volume of Preferred Water, CaCa = Carrying capacity) 1. Great Central Sockeye CU 2. Sproat Sockeye CU 3. Henderson Sockeye CU DESCRIPTION OF FACTOR BIOLOGICAL RISK calculated for each factor limiting productive capacity DESCRIPTION OF FACTOR BIOLOGICAL RISK calculated for each factor limiting productive capacity DESCRIPTION OF FACTOR RISK calculated for each factor limiting productive capacity Life History Requirement Issue/Limiting factor & id number Current Biol Risk category Future Biol Risk category Life History Requirement Issue/Limiting factor & id number Current Biol Risk category Future Biol Risk category Life History Requirement factor & id number Current Biol Risk category Future Biol Risk Category A. Terminal Migration & Spawning A. Terminal Migration & Spawning A. Terminal Migration & Spawning 2. volume of preferred water (VOPW, low temp, high O2) in estuary LF2: Significant reductions of VOPW in & estuary with chronic to impacts on adult "fitness". Moderate High 2. volume of preferred water (VOPW, low temp, high O2) in estuary LF2: Significant reductions of VOPW in inlet & estuary with chronic to impacts on adult "fitness". Moderate High 9. Stable channel and stable coarse bedload transport LF10: Riparian disturbance resulting in bank erosion, increased bedload. Very High Very High 4. Favorable temperatures for low stress passage LF4: High temps slow or stop upstream migration Moderate Very High 4. Favorable temperatures for low stress passage LF4: High temps slow or stop upstream migration Moderate Very High 11b. Spawning habitat quantity sufficient to fully "seed" fry rearing habitat. TRIB SPAWNERS ONLY LF12B: Inadequate TRIB spawning habitat (i.e. CU production potential limited by initial fry recruitment). High Very High 11b. Spawning habitat quantity sufficient to fully "seed" fry rearing habitat. TRIB SPAWNERS ONLY LF12B: Inadequate TRIB spawning habitat (i.e. CU production potential limited by initial fry recruitment). Moderate Moderate 11b. Spawning habitat quantity sufficient to "seed" fry rearing habitat. TRIB SPAWNERS ONLY LF12B: Inadequate TRIB spawning habitat (i.e. CU production potential limited by initial fry recruitment). Moderate Moderate 11. Spawning habitat quantity sufficient to fully "seed" fry rearing habitat. BEACH SPAWNERS ONLY LF12: Inadequate BEACH spawning habitat (i.e. CU production potential limited by initial fry recruitment). Moderate High
Appendix 6: Options from Somass Habitat Status Report From M. Wright 2011. The habitat status report is summarized in the Barkley Sockeye Compendium Life Stage Information Gaps Possible measures to address limiting factors Possible measures to maintain productivity Habitat Protection & Restoration Measures Undertaken Returning Migration Data for road density, land cover alterations, riparian disturbance metrics were incomplete. More information from TFL holders and private land owners is required. Water quality data for estuary and lower Somass River. Rumoured upgrades to several tributaries in the system – but no confirmed results. Explore cooling options for temperature. Riparian restoration along stream banks to provide shade and cover. Investigate and stop unregulated discharge sources. Riparian restoration stream banks and to accelerate deciduous stands to coniferous forest. Retain existing riparian area and cease new development of estuary and river margin. Water quality monitoring. Investigate and stop unregulated discharge sources. Improved pulp mill effluent quality since 1993 (Hatfield, 2010). Spawner/Egg/ Alevin Data for road density, land cover alterations, riparian disturbance metrics were incomplete. More information from TFL holders and private land owners is required. Water chemistry, metals and contaminants – no data. Rumoured upgrades to several tributaries in the system – but no confirmed results. Rumoured upgrades to several tributaries in the system – but no confirmed results. Require land owners to provide necessary data to address metrics. Explore cooling options for river temperature. Investigate and stop unregulated discharge sources. Riparian restoration along stream banks and to accelerate mono-species deciduous stands to coniferous forest. Retain existing riparian area and new development of estuary and river margin. Water quality monitoring to the tidal boundary of Somass River. Improved pulp mill effluent quality since 1993 (Hatfield, 2010).