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[205.36 KB] Kier (2016) Performance measure for adult escapement to Trinity R.pdf
Kier, M. C. 2016. Escapement and proportion of natural origin salmonids contributing to total escapement. Trinity River Restoration Program (TRRP) Performance Measure. TRRP, Weaverville, California.
"Results: The escapement and proportion (percent) of naturally produced spawners are shown in Figures 1-4. Steelhead show the strongest and significant (P>0.05) increasing trend of percent increase in natural production over the periods shown. They also spend the most time juvenile rearing in the river which may reflect a positive response to an improvement in juvenile rearing conditions. Since 2007, naturally produced spring and fall Chinook also show a general increase in percent of production compared to 2001-2005. Naturally produced fall Chinook salmon were above 50% of the total fall Chinook spawners six of the eight years since 2007 and only above 50% once in the previous five years 2001-2006. Naturally produced coho salmon have not shown a trend over the periods shown, but have increased since 2009."
First Posted: 2016-05-10 01:33:56
Post Updated: 2016-05-10 01:33:56