Difference between revisions of "Brown Trout"
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− | ! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;">The Brown Trout Workshop</h2> | + | ! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;">[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/index.html The Brown Trout Workshop]</h2> |
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− | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/ | + | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/BT01.pdf Brown Trout Workshop Agenda] |
− | *[ | + | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/BT02.pdf Brown Trout Workshop Overview] |
− | *[[ | + | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/BT03.pdf Pueblo of Zuni Perspectives on Fish Research and Management] |
− | *[ | + | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/BT04a.pdf Brown Trout Below Glen Canyon Dam: A Preliminary Analysis of Risks and Options White Paper] |
− | *[ | + | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/BT04b.pdf Context and Objectives] |
− | *[ | + | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/BT05a.pdf Scientific Background] |
+ | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/BT05b.pdf Preliminary Review of Bright Angel Creek Trout Control Operations] | ||
+ | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/BT06.pdf Root Causes for the Increase in Brown Trout in Lees Ferry Reach] | ||
+ | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/BT07.pdf Risks, Current and Potential] | ||
+ | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/BT08.pdf Comparison of Management Options] | ||
+ | *[https://www.usbr.gov/uc/rm/amp/amwg/mtgs/17sep20/index.html Brown Trout Monitoring and Research] | ||
== Action requested. Proposed draft motion AMWG meeting 2/15/17: == | == Action requested. Proposed draft motion AMWG meeting 2/15/17: == | ||
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should be reported to the TWG for consideration in development of the Triennial Work | should be reported to the TWG for consideration in development of the Triennial Work | ||
Plan and presented to the AMWG at the August 2017 meeting. | Plan and presented to the AMWG at the August 2017 meeting. | ||
+ | *[[Media:LetterToNPS-planning.pdf| Letter from Brent Rhees, Acting Secretary's Designee, to NPS requesting a 2017 brown trout workshop.]] | ||
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Revision as of 14:51, 17 October 2017
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Brown TroutBrown trout are native to Europe and were introduced to tributaries in the Grand Canyon in the 1920s. They are capable of withstanding slightly higher temperature than rainbow trout. Unlike most other trout species, brown trout spawn in the late fall. Their spawning behavior, however, is similar to other trout species. Like rainbow trout, young brown trout feed on aquatic and terrestrial insects and invertebrates but brown trout are more apt to switch to eating other fish as they get bigger. The rainbow trout found in Grand Canyon are more likely to continue to eat mostly insects and invertebrates even as adults. [1] [2] Studies have shown that rainbow trout and native fish like humpback chub often have a difficult time persisting in the presence of a large population of brown trout. [3] [4] [5] 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. |
Rainbow Trout | Brown Trout |
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