Reproductive Success of Artificially Reconditioned Kelt Steelhead in the Yakima River
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1 Reproductive Success of Artificially Reconditioned Kelt Steelhead in the Yakima River Jeff Stephenson, Dave Fast, Bill Bosch, Joe Blodgett, Ryan Branstetter, Andy Pierce, Shawn Narum, Doug Hatch
2 Acknowledgements Tracy Hauser (BPA) Chris Frederiksen (YN) Jeff Trammell (YN) Tim Resseguie (YN) Todd Newsome (YN) Ryan Deknikker (YN) Bill Fiander (YN) Jeremiah Newell (CRITFC) Bobby Begay (CRITFC) CRITFC Genetics Crew Prosser Hatchery Crew
3 Outline Provide some background on the kelt reconditioning program Present research questions for this study Preliminary results and some interpretation of parentage analysis
4 Natural Reproductive Success Seamons & Quinn 2010 studied 19 Brood years of a wild population of steelhead Theorized that: lifetime reproductive success (LRS).. should scale with the number of breeding seasons Found that: female repeat spawners had nearly twice the success of one time spawners
5 Life history of natural kelts in Yakima Spawning Incubation Kelts Upstream Migration Resident Rearing Outmigration Estuary & Ocean
6 Upstream Migration Spawning Incubation Rearing Resident Kelts Outmigration ~70% of the Yakima run is moving downstream of Prosser Estuary & Ocean
7 Upstream Migration Spawning Incubation Rearing Resident Kelts Outmigration ~70% of the Yakima run is moving downstream of Prosser Estuary & Ocean 12% to 35% survival of Yakima kelts to the ocean
8 Upstream Migration Spawning Incubation Rearing Resident Kelts Outmigration ~70% of the Yakima run is moving downstream of Prosser Estuary & Ocean high seas samples contain 7.2% previous spawners 12% to 35% survival of Yakima kelts to the ocean
9 Repeat spawners typically comprise 60% consecutive and 40% skips. Upstream Migration Resident Spawning Estuary & Ocean high seas samples contain 7.2% previous spawners Incubation Rearing Kelts Outmigration ~70% of the Yakima run is moving downstream of Prosser 12% to 35% survival of Yakima kelts to the ocean
10 2.7% of the run at Prosser are natural repeat spawners Repeat spawners typically comprise 60% consecutive and 40% skips Upstream Migration Resident Spawning Estuary & Ocean high seas samples contain 7.2% previous spawners Incubation Rearing Kelts Outmigration ~70% of the Yakima run is moving downstream of Prosser 12% to 35% survival of Yakima kelts to the ocean
11 Artificial Reconditioning In the Yakima River to date Capture and feed for 6 to 9 Months Collected 8,110 kelt steelhead Reconditioned and released 3,305 Survival to release ~ 40% Individual survival correlated with fish condition Hatch et al NAJFM 33(3)
12 Research Questions 1. Do artificially reconditioned kelt steelhead reproduce in the wild? 2. What is the relative reproductive success (RRS) of artificially reconditioned kelt steelhead? 3. What is the lifetime reproductive success (LRS) of artificially reconditioned kelt steelhead?
13 Logistical Issues Limited power due to sampling a small proportion of the population Incidental sampling of resident offspring Need to know juvenile age No data for skip spawners No data for naturally reconditioned kelts Currently have only two years of data
14 Parent Collections-Female Only Pre-spawn maidens. Upstream at Prosser Post-spawn maidens. Downstream at Chandler Reconditioned Kelts. Upstream at Prosser Includes known non-rematuring fish
15 Offspring collections Electrofished in August and September Targeted areas with known steelhead spawning Targeted age-0 young of the year
16 Genotyping Methods Genotyped 192 SNP markers using targeted amplicon sequencing on Illumina Hiseq 1500 Dropped 40 markers 35 with low diversity (MAF < 0.05) 3 cutthroat diagnostic 1 poor genotypes 1 sex marker
17 Sample with Genotypes 1,440 Genotyped Parents Pre-spawn maidens Post-spawn maidens Reconditioned kelts ,161 Genotyped Offspring Satus Creek Toppenish Creek Naches River 89 Big Creek 19 Ahtanum Creek 14
18 Parentage Method Used the Program CERVUS Simulations ran to determine a 99% confidence interval for LOD scores (natural log of overall likelihood ratio). Progeny assignments were used if Met 99% confidence interval Had one or less mismatching loci. Allows for minor genotyping error
19 Parentage Results Juveniles assignment rates 2013: 19% (105 of 548) to at least 1 parent 2014: 30% (148 of 491) to at least 1 parent Parent assignment rates 2013: 5.6% (46 of 822) had at least 1 progeny 2014: 7.9% (49 of 618 ) had at least 1 progeny Low detection rates are the result of the low proportions of parents and progeny sampled throughout the Yakima Basin
20 1. Do artificially reconditioned kelt steelhead reproduce in the wild?
21 1. Do artificially reconditioned kelt steelhead reproduce in the wild?
22 1. Do artificially reconditioned kelt steelhead reproduce in the wild? YES
23 2. What is the relative reproductive success of artificially reconditioned kelt steelhead? Standardized to pre-spawn maidens
24 2. What is the relative reproductive success of artificially reconditioned kelt steelhead?
25 2. What is the relative reproductive success of artificially reconditioned kelt steelhead?
26 3. What is the lifetime reproductive success (LRS) of artificially reconditioned kelt steelhead
27 3. What is the lifetime reproductive success (LRS) of artificially reconditioned kelt steelhead
28 3. What is the LRS of artificially reconditioned kelt steelhead relative to first-time spawners? 1.83 Almost twice
29 Preliminary Conclusions Kelts represent an important life history for steelhead Reconditioned kelts reproduce in the wild Reconditioned kelts had a LRS level similar to natural kelts (Seamons & Quinn 2010) Reconditioned kelts have the potential to increase productivity of natural populations
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