Status and Trends - Fish
 
subbasinYakima Subbasin bar By the 1970s and 1980s, all of the Yakima River salmonid stocks were either extirpated or severely depressed. Summer-run Chinook were extirpated from the Yakima Basin by 1970, while coho were declining until they were gone by the early 1980s. By the 1980s and 1990s, adult spring Chinook and steelhead returns were less than 3,500 and 1,000, respectively. 

 
Yakima Subbasin fish infographics

 

 

 Steelhead 

Comprised of four populations: Toppenish, Satus, Naches and Upper Yakima

 

Returns: Returns increased by 2,019 fish per year (annual average) 2008-2018 versus 1997-2007

 

Redd counts: Increased somewhat through the Accord period

 

Wild smolt-to-adult index 2002-2014: 4.95% (average, McNary-McNary)

Yakima SteelheadYakima Steelhead Tributaries

 


Yakima Summer Chinook

 

 Summer Chinook

Extirpated from the Yakima Subbasin by 1970

 

Reintroduced with Yakama Nation juvenile releases starting in 2009

 

Goal: Self sustaining locally-adapted population contributing to the fishery


 Spring Chinook

Returns: Although not as high during the Accord period as in the early 2000s, annual increases have been observed

 

Redd counts: Lower during the Accord period than in the early 2000s; however, spatial distribution increased in underutilized habitat

 

Wild smolt to-adult Index: brood year 2000-2013 is 2.38% (average, Prosser-Yakima mouth)

Yakima Spring Chinook

 


Yakima Fall Chinook

 

 Fall Chinook

Escapement: Contributing to Treaty fishery, 10-year average escapement is 5,279 fish

 

Spatial distribution: Supplemented by Yakama Nation from 1983, distribution increasing throughout the Yakima Subbasin


 Sockeye

Extirpated from the Yakima Basin in the early 1990's, the Yakama nation began reintroducing adults in 2009

 

2013: First reintroduced fish spawned at Lake Cle Elum return as adults.

 

2013-2018: Average return 1,380 fish (Prosser count)

Yakima Sockeye

 


Yakima Coho

 

 Coho

Extirpated from the Yakima Basin in the early 1980's, reintroductions began in 1985.

 

2008-2018: Prosser Dam adult counts averaged 5,443 coho annually.

 

2018: Construction starts on hatchery  that can produce 700,000 smolts


Pacific Lamprey

Documented increased distribution and abundance in all translocation subbasins

 

Transported 1,238 adults from Lower Columbia Dams (average ~1,000/yr)

 

2017: 561 adults counted at Prosser Dam, more than 7 times previous counts

Yakima Lamprey