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| | *[http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2015-0101#.WQOC9lXyu00 Korman et al. 2015. Factors controlling the abundance of rainbow trout in the Colorado River in Grand Canyon in a reach utilized by endangered humpback chub. Canadian Journal of Fisheries and Aquatic Sciences, 2016, 73(1): 105-124] | | *[http://www.nrcresearchpress.com/doi/abs/10.1139/cjfas-2015-0101#.WQOC9lXyu00 Korman et al. 2015. Factors controlling the abundance of rainbow trout in the Colorado River in Grand Canyon in a reach utilized by endangered humpback chub. Canadian Journal of Fisheries and Aquatic Sciences, 2016, 73(1): 105-124] |
| | *[[2015 News about the declining fish status at Fishery| Update on the 2015 decline in fish condition and abundance at Lees Ferry]] | | *[[2015 News about the declining fish status at Fishery| Update on the 2015 decline in fish condition and abundance at Lees Ferry]] |
| − | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/15jan20/Attach_12.pdf Natal Origins of Rainbow Trout: Glen Canyon and Marble Canyon] | + | *[https://www.usbr.gov/uc/progact/amp/twg/2015-01-20-twg-meeting/Attach_12.pdf Natal Origins of Rainbow Trout: Glen Canyon and Marble Canyon] |
| − | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/15jan20/Attach_18.pdf Rainbow Trout Growth, Condition, Population Dynamics and Modeling in Glen Canyon] | + | *[https://www.usbr.gov/uc/progact/amp/twg/2015-01-20-twg-meeting/Attach_18.pdf Rainbow Trout Growth, Condition, Population Dynamics and Modeling in Glen Canyon] |
| | | | |
| | '''2014''' | | '''2014''' |
| | *Yackulic, C.B, Yard, M.D., Korman, J. and D.R. Haverbeke. 2014. A quantitative life history of endangerd humpback chub that spawn in the Little Colorado River: variation in movement, growth, and survival. Ecol. Evol. 4: 1006-100. | | *Yackulic, C.B, Yard, M.D., Korman, J. and D.R. Haverbeke. 2014. A quantitative life history of endangerd humpback chub that spawn in the Little Colorado River: variation in movement, growth, and survival. Ecol. Evol. 4: 1006-100. |
| − | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/14oct28/Attach_12.pdf New Insights on Trout from the Natal Origins Study] | + | *[https://www.usbr.gov/uc/progact/amp/twg/2014-10-28-twg-meeting/Attach_12.pdf New Insights on Trout from the Natal Origins Study] |
| − | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/14jan30/AR_Yard_Korman_NO.pdf Natal Origins update] | + | *[https://www.usbr.gov/uc/progact/amp/twg/2014-01-30-twg-meeting/AR_Yard_Korman_NO.pdf Natal Origins of Rainbow Trout: Glen Canyon and Marble Canyon] |
| − | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/14jan30/AR_Yard_Korman_NO.pdf Natal Origins of Rainbow Trout: Glen Canyon and Marble Canyon]
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| | '''2013''' | | '''2013''' |
| − | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/13jan24/5_Yard.pdf Natal Origins update] | + | *[https://www.usbr.gov/uc/progact/amp/twg/2013-01-24-twg-meeting/5_Yard.pdf Natal Origins: Glen Canyon and Marble Canyon] |
| − | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/13jan24/5_Yard.pdf Natal Origins: Glen Canyon and Marble Canyon]
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| | =='''Local recruitment in Marble Canyon down to the LCR:'''== | | =='''Local recruitment in Marble Canyon down to the LCR:'''== |
| − | There does appear to be some local trout recruitment in Marble Canyon down to the LCR but the numbers of trout at the LCR are driven more by immigration from upstream sources (i.e. the Lees Ferry reach) than by local recruitment. [https://www.usbr.gov/uc/rm/amp/twg/mtgs/14oct28/Attach_12.pdf] [https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR16_Yard.pdf] [[File:LocalRecruitment.jpg|center|700px]] | + | There does appear to be some local trout recruitment in Marble Canyon down to the LCR but the numbers of trout at the LCR are driven more by immigration from upstream sources (i.e. the Lees Ferry reach) than by local recruitment. [https://www.usbr.gov/uc/progact/amp/twg/2014-10-28-twg-meeting/Attach_12.pdf] [https://www.usbr.gov/uc/progact/amp/twg/2017-01-26-twg-meeting/AR16_Yard.pdf] [[File:LocalRecruitment.jpg|center|700px]] |
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Links and Information
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Background
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Initial investigations found:
- Efficacy of Mechanical Removal is dependent on immigration levels
- RBT abundance was high and variable, partially offset by trout immigration
- BNT were more predaceous than RBT
- RBT were more numerous than BNT
- Predation risk is a function of both density & predatory behavior
Information Needs:
- What controls trout abundance?
- Where were RBT migrants originating from?
- How many sub-adult HBC move into the mainstem?
- How variable was subadult HBC survival?
- Was there a relationship between HBC survival & RBT abundance?
Outcomes:
Need to develop alternative sampling methods for determining trout and chub abundance and vital rates
- Natal Origin Project: Movement and trout dynamics
- NSE/JCM Projects: Juvenile HBC survival and other regulating factors
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Presentations and Papers
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2018
- Yackulic, C.B., Korman, J., Yard, M.D., and J. Dzul.. 2018. Inferring species interactions through joint mark-recapture analysis. Ecology. Early view article.
2017
- Korman, J., M.D. Yard, and T.A. Kennedy. 2017. Trends in rainbow trout recruitment, abundance, survival, and growth during a boom-and-bust cycle in a tailwater fishery. Trans. Am. Fish. Soc. 146:1043-1057.
- Korman, J., and M.D. Yard. 2017. Effects of environmental covariates and density on the catchability of fish populations and the interpretation of catch per unit effort trends. Fish. Res. 189:18-34.
- Dzul, M.C., Yackulic, C.B., and J. Korman. 2017. Estimating disperser abundance using open population models that incorporate data from continuous detection PIT arrays. Can. J. Fish. Aquat. Sci. e-first article.
- Boom-and-Bust Cycles in the Population of Rainbow Trout in Glen Canyon and Effect of Fall High Flow Experiments
- Natal Origin Project PPT
2016
- Yard, M.D., Korman, J., Walters, C.J., and T.A. Kennedy. 2016. Seasonal and spatial patters of growth of rainbow trout in the Colorado River in Grand Canyon Arizona. Can. J. Fish. Aquat. Sci. 73:125-139.
- Korman, J, Yard, M.D., and C.B. Yackulic. 2016. Factors controlling the abundance of rainbow trout in the Colorado River in Grand Canyon in a reach utilized by endangered humpback chub. Can. J. Fish. Aquat. Sci. 73:105-124.
- Dodrill, M.D., Yackulic, C.B., Yard, M.D. and J.W. Hayes. 2016. Prey size and availability limits maximum size of rainbow trout in a large tailwater: insights from a drift-foraging bioenergetics model. Can. J. Fish. Aquat. Sci. 73: 759-772.
- Dzul, M.C., Yackulic, C.B., Korman, J., Yard, M.D., and J.D. Muehlbauer. 2016. Incorporating temporal heterogeneity in environmental conditions into a somatic growth model. Can. J. Fish. Aquat. Sci. 74:316-326.
- Finch, C., W. E. Pine, C. B. Yackulic, M. J. Dodrill, M. Yard, B. S. Gerig, L. G. Coggins, and J. Korman. 2016. Assessing Juvenile Native Fish Demographic Responses to a Steady Flow Experiment in a Large Regulated River. River Research and Applications 32:763-775
- Natal Origins of Rainbow Trout Project, Years 1-4 (Nov 11 – Dec 15)
2015
2014
2013
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Other Stuff
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Local recruitment in Marble Canyon down to the LCR:
There does appear to be some local trout recruitment in Marble Canyon down to the LCR but the numbers of trout at the LCR are driven more by immigration from upstream sources (i.e. the Lees Ferry reach) than by local recruitment. [2] [3]
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