Difference between revisions of "FISHERY"
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[[File:NO TroutAbundances2016.jpg|center|500px]] [http://www.usbr.gov/uc/rm/amp/amwg/mtgs/16aug24/Attach_07a.pdf] | [[File:NO TroutAbundances2016.jpg|center|500px]] [http://www.usbr.gov/uc/rm/amp/amwg/mtgs/16aug24/Attach_07a.pdf] | ||
[[File:TroutFlows.jpg|center|500px]] | [[File:TroutFlows.jpg|center|500px]] | ||
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[[File:TroutRemoval.jpg|center|500px]] | [[File:TroutRemoval.jpg|center|500px]] | ||
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*[http://gcdamp.com/index.php?title=WATER_QUALITY Water Quality Page] | *[http://gcdamp.com/index.php?title=WATER_QUALITY Water Quality Page] | ||
*[http://gcdamp.com/index.php?title=Nutrients Nutrients Page] | *[http://gcdamp.com/index.php?title=Nutrients Nutrients Page] | ||
+ | *[http://gcdamp.com/index.php?title=Whirling_Disease Whirling Disease Page] | ||
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*[[Natal Origins Project (NO)]] | *[[Natal Origins Project (NO)]] | ||
+ | *[[Trout Reduction Efforts]] | ||
+ | *[[Rainbow trout / humpback chub predation studies]] | ||
*Spring and Fall Lees Ferry Trout Monitoring and CREEL surveys | *Spring and Fall Lees Ferry Trout Monitoring and CREEL surveys | ||
*Rainbow Trout Early Life Stage Study (RTELSS) | *Rainbow Trout Early Life Stage Study (RTELSS) | ||
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*Bioenergetics | *Bioenergetics | ||
*Individual Based Modeling (IBM) | *Individual Based Modeling (IBM) | ||
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'''2017''' | '''2017''' | ||
+ | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR11_Bair.pdf Is Rainbow Trout Control Necessary, and if so, What is the Most cost-effective approach? ] | ||
*[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17feb15/Lees%20Ferry%20Trout.pdf Lees Ferry Trout Fishery Status and PPT] | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17feb15/Lees%20Ferry%20Trout.pdf Lees Ferry Trout Fishery Status and PPT] | ||
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*[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR14_Rogowski.pdf Lees Ferry Long Term Monitoring PPT] | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR14_Rogowski.pdf Lees Ferry Long Term Monitoring PPT] | ||
*[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR15_Korman.pdf Boom-and-Bust Cycles in the Population of Rainbow Trout in Glen Canyon and Effect of Fall High Flow Experiments PPT] | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR15_Korman.pdf Boom-and-Bust Cycles in the Population of Rainbow Trout in Glen Canyon and Effect of Fall High Flow Experiments PPT] | ||
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*[http://www.usbr.gov/uc/rm/amp/amwg/mtgs/16aug24/Attach_07a.pdf Grand Canyon Monitoring and Research Center Science Updates (BO Compliance, Trout Updates, Green Sunfish, Fisheries PEP, Partners in Science)] | *[http://www.usbr.gov/uc/rm/amp/amwg/mtgs/16aug24/Attach_07a.pdf Grand Canyon Monitoring and Research Center Science Updates (BO Compliance, Trout Updates, Green Sunfish, Fisheries PEP, Partners in Science)] | ||
*[[Media:2016 Lees Ferry Fishery Status Spring.pdf| Current Status of the Lees Ferry Fishery - Spring 2016]] | *[[Media:2016 Lees Ferry Fishery Status Spring.pdf| Current Status of the Lees Ferry Fishery - Spring 2016]] | ||
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*[http://www.usbr.gov/uc/rm/amp/twg/mtgs/16jan26/documents/Attach_07b.pdf Lees Ferry Recreational Trout Fishery Management Recommendations: The Voice of Lees Ferry Recreational Anglers, Guides, and Businesses] | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/16jan26/documents/Attach_07b.pdf Lees Ferry Recreational Trout Fishery Management Recommendations: The Voice of Lees Ferry Recreational Anglers, Guides, and Businesses] | ||
*[http://www.usbr.gov/uc/rm/amp/twg/mtgs/16jan26/documents/Attach_07c.pdf Memo from Scott VanderKooi to TWG Chair Dated 12/9/15, Subject: Technical Review of the Lees Ferry Recreational Trout Fishery Management recommendations] | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/16jan26/documents/Attach_07c.pdf Memo from Scott VanderKooi to TWG Chair Dated 12/9/15, Subject: Technical Review of the Lees Ferry Recreational Trout Fishery Management recommendations] | ||
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*[http://www.usbr.gov/uc/rm/amp/twg/mtgs/16jan26/documents/AR15_Bair.pdf Economic value of angling on the Colorado River at Lees Ferry: Using secondary data to estimate the influence of seasonality] | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/16jan26/documents/AR15_Bair.pdf Economic value of angling on the Colorado River at Lees Ferry: Using secondary data to estimate the influence of seasonality] | ||
*[http://www.usbr.gov/uc/rm/amp/twg/mtgs/16jan26/documents/AR21_Nelson.pdf Bright Angel Creek Non-Native Trout Reduction, Grand Canyon National Park] | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/16jan26/documents/AR21_Nelson.pdf Bright Angel Creek Non-Native Trout Reduction, Grand Canyon National Park] | ||
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'''2015''' | '''2015''' | ||
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*[https://www.usbr.gov/uc/rm/amp/twg/mtgs/13jun26/Attach_07b.pdf GCMRC Science Update on Sediment and Fisheries] | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/13jun26/Attach_07b.pdf GCMRC Science Update on Sediment and Fisheries] | ||
*[http://www.usbr.gov/uc/rm/amp/twg/mtgs/13jan24/4_Anderson.pdf Rainbow trout monitoring update] | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/13jan24/4_Anderson.pdf Rainbow trout monitoring update] | ||
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*[http://www.usbr.gov/uc/rm/amp/twg/mtgs/13jan24/13_Healy.pdf Nonnative fish control in GCNP tributaries] | *[http://www.usbr.gov/uc/rm/amp/twg/mtgs/13jan24/13_Healy.pdf Nonnative fish control in GCNP tributaries] | ||
*[https://www.usbr.gov/uc/rm/amp/twg/mtgs/13jan24/4_Anderson.pdf Grand Canyon Rainbow Trout 2012 Monitoring Results] | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/13jan24/4_Anderson.pdf Grand Canyon Rainbow Trout 2012 Monitoring Results] | ||
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*[https://www.usbr.gov/uc/rm/amp/twg/mtgs/13jan24/13_Healy.pdf Non-native Fish Control in Tributaries: Grand Canyon National Park] | *[https://www.usbr.gov/uc/rm/amp/twg/mtgs/13jan24/13_Healy.pdf Non-native Fish Control in Tributaries: Grand Canyon National Park] | ||
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==Additional Links== | ==Additional Links== | ||
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*[http://gcdamp.com/index.php?title=Bishop_Study Bishop Study and Angler Preferences] | *[http://gcdamp.com/index.php?title=Bishop_Study Bishop Study and Angler Preferences] | ||
Revision as of 13:38, 28 April 2017
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The Lees Ferry Rainbow Trout FisheryIn 1964, the Lees Ferry tailrace on the Colorado River was given birth by the completion of Glen Canyon Dam, which impounded Lake Powell. Subsequent water releases from the bottom of Lake Powell changed the once highly turbid, warm waters of the Colorado River into a constant cold (46-50°F), clear flowing river. Shortly after completion of the dam, the Arizona Game and Fish Department stocked rainbow trout (Oncorhynchus mykiss) in the 15-mile Lees Ferry reach and, in 1981, began to manage this section of river as a Blue Ribbon rainbow trout fishery. The trout began to flourish in the Lees Ferry reach from 1970-1985 when catches of rainbow trout above 10-pounds were not uncommon, and angler pressure was relatively low. In 1991, however, the Bureau of Reclamation implemented the Record of Decision flow regime, which consisted of higher minimum and more stable flows and allowed for increased trout reproduction and survival. Under these conditions, a huge population of trout developed causing individual fish growth rates to decline. Quite simply, there was a large number of fish competing for limited space and food items, resulting in a fishery where trout less than 14-in were dominant. In 2000, the Arizona Game and Fish Department began a long-term monitoring program sponsored by Grand Canyon Monitoring and Research Center to determine the effects of Glen Canyon Dam operation on the trout fishery at Lees Ferry and to make recommendations for improving this fishery. Since 2000, our data collection has shown an increase in the general health of all trout age classes (especially since 2002). This increase in fish health is usually associated with an increase in growth rates. There has been a marked increase in catch rates of young-of-the-year fish in recent years. With successful spawning and recruitment continuing to occur, fishing conditions in Lees Ferry are improving. [1] Desired Future Condition for the Lees Ferry Trout FisheryA high quality trout fishery in GCNRA, as further described in the Recreation DFC that does not adversely affect the native aquatic community in GCNP. |
File:RainbowTrout1.jpg* Rainbow Trout |
File:BrownTrout1.jpg* Brown Trout |
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