Fish Species Coho Salmon (ESA Threatened ) Coastal Cutthroat Trout - - PowerPoint PPT Presentation

Fish Species

Coho Salmon (ESA Threatened) Coastal Cutthroat Trout Lamprey (Pacific and Brook) – (Conservation Strategy Species) Estuarine/Marine dependent species (several Conservation Strategy Species)

Starry flounder, shiner surfperch, black rockfish, Pacific sandlance, etc.

Coho Salmon

Diverse life histories

Adult/Jack Subyearling estuarine rearing (spring entry through winter entry) Yearling outmigrant

Likely Limiting Factors

Juvenile Rearing (instream is poor due to lack of complexity/pools; Marsh is suitable but temperature dependent

• Both summer and winter habitat is low quality in stream

Adult Passage (tidegate/culvert) Spawning Habitat (Generally moderate quality in Reneke and Beltz)

Production Potential

Reneke at full-seeding, 118 summer parr/km, this is very low production potential (under 900 parr/km is low) Need to ensure adult access and improve instream habitat quality.

Coho Salmon

Compared to Existing Condition

Full Breach Modern Tidegate Setback Levee Worse Better

• Benefit of breach applies to coho juveniles from adjacent basins as well
• While modern tidegate may meet passage standards, concerns remain regarding water quality w/muted exchange
• Setback levees can provide a substantial percentage of needed ecological benefits

Coastal Cutthroat Trout

Diverse life histories (More so than coho)

• Resident and anadromous
• Life history diversity exists within and among cohorts\siblings

Potential Limiting Factors

• Spawning Habitat (Generally low quality in Reneke and Beltz)
• Juvenile Rearing (instream is poor due to lack of complexity/pools; Marsh is suitable but temperature-dependant)
• Both summer and winter habitat is low quality in stream
• Passage for searun life history

Coastal Cutthroat Trout

Compared to Existing Condition

Full Breach Modern Tidegate Setback Levee Worse Better

• Similar to coho

Lamprey

Pacific Lamprey

• Anadromous life history
• Likely intermittent presence in Reneke/Beltz
• Information on use of small streams is sparse
• Passage issues can be limiting
• Instream conditions likely poor

Western Brook Lamprey

• Resident life history
• Some suitable habitat is present in Reneke/Beltz, but quantity is likely limiting
• Passage issues in Reneke probably not substantial due to resident life history
• Sensitive to water quality issues
• Freshwater marsh could contain some areas suitable for ammocoetes, but temperature is an issue

Lamprey (Pacific)

Compared to Existing Condition

Full Breach Modern Tidegate Setback Levee Worse Better

• Setback levee would be outside the distribution of Pacific Lamprey, so setback provides full benefit

Estuarine/Marine dependent

Estuarine waters serve as nursery for many marine species Potential Limiting Factors

Current freshwater status of marsh renders Beltz Marsh unavailable to estuarine and marine dependent species Juvenile rockfish, surf perch, flatfish, etc.

Estuarine\Marine-Dependent

Compared to Existing Condition

Full Breach Modern Tidegate Setback Levee Worse Better

• Salinity intrusion is key to providing suitable access