Annual Report Of Operations At Rapid River Hatchery Project Ipc 26 And Evaluation Of Spring Chinook Salmon Emigration Harvest And Return To Rapid River Hatchery Project Ipc 17

Author : Matthew J. Belnap
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.:/5 (126 download)

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Download or read book IPC and LSRCP Monitoring and Evaluation Programs in the State of Idaho written by Matthew J. Belnap and published by . This book was released on 2019 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: [Section 1] This annual report provides a finalized summary of brood year 2010 (BY10) Chinook Salmon Oncorhynchus tshawytscha released from Lower Snake River Compensation Plan (LSRCP) and Idaho Power Company (IPC) hatcheries operated by the Idaho Department of Fish and Game (IDFG). Idaho-LSRCP (McCall [MFH], Clearwater [CFH], and Sawtooth [SFH]) and IPC (Rapid River [RRFH] and Pahsimeroi [PFH]) fish hatcheries collected 13,344,363 green eggs and released 9,317,508 BY10 Chinook Salmon that included 302,782 released as parr in 2011 and 9,014,726 released as smolts in 2012. All facilities met their production targets for green eggs taken and met or were within 5% smolt release targets except for Sawtooth and Clearwater. Generally, facilities faced minor fish health issues, the most prevalent being bacterial kidney disease (BKD) which resulted in the culling of eggs from production. Fish health culls at McCall Fish Hatchery and Rapid River Fish Hatchery were both higher than the previous ten-year average. None of the fish health issues affecting BY10 Chinook resulted in significant losses to production. Representative groups of juveniles from each facility were PIT tagged to estimate survival from release to Lower Granite Dam (LGD). Estimated juvenile survival rates during the 2012 migration ranged from 29.6% at the Yankee Fork (2nd Bridge) to 75.5% at Clear Creek. The average juvenile survival across all groups was 59.4%, and with the exception of CFH releases into the SF Clearwater River drainage (Red and Crooked rivers), survival rates were higher than the five-year average for all facilities. BY10 adult Chinook returned from 2013 through 2015. Adult returns are summarized by age and release site for each hatchery and include estimates of harvest (ocean, downriver, and terminal), strays, below-weir dropouts, and escapement. Hatchery-origin Chinook Salmon released from LSRCP and IPC hatcheries in Idaho were harvested in tribal and non-tribal fisheries in the Columbia and Snake rivers downstream of LGD and in mainstem and tributary fisheries upstream of LGD. The number of each hatchery’s brood-specific adult return that was harvested below LGD ranged from 492 fish for Pahsimeroi Fish Hatchery (PFH) to 5,475 for Rapid River Fish Hatchery (RRFH), with a total of 11,725 fish for all BY10 Chinook. The number of each hatchery’s return to LGD that was harvested above LGD ranged from 88 fish for PFH to 16,053 for RRFH. The number of strays below LGD ranged from 0 to 180, and the number of strays above LGD ranged from 0 to 589. Most of the stray recoveries for Clearwater Fish Hatchery were collected at Dworshak and Kooskia hatcheries, and the strays from Sawtooth Fish Hatchery (SFH) were fish released at the Yankee Fork River that strayed back to the SFH rack. Smolt-to-adult survival (SAS) rates from these returns ranged from 0.251% for Pahsimeroi Fish Hatchery (PFH) to 0.892% for Rapid River Fish Hatchery (RRFH). Smolt-to-adult returns (SAR) above LGD ranged from 0.203% for PFH to 0.711% for RRFH. SARs and SASs were below the recent five-year averages at all facilities. Progeny-to-parent ratios (PPR) to the project area ranged from 2.77 at Clearwater Fish Hatchery (CFH) to 7.53 at RRFH.