Difference between revisions of "Translocation Projects"
From Glen Canyon Dam AMP
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| − | ! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3bfb1; text-align:left; color:#000; padding:0.2em 0.4em;"> | + | ! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3bfb1; text-align:left; color:#000; padding:0.2em 0.4em;">Projects</h2> |
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| + | ==Little Colorado River above Chute Falls (monitoring: May or June)== | ||
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| + | ==Havasu Creek== | ||
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| + | ==Shinumo Creek [https://www.usbr.gov/uc/rm/amp/twg/mtgs/14oct28/Attach_11.pdf]== | ||
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| + | Included as a Conservation measure in the 2008 and 2011 Biological <br> | ||
| + | |||
| + | ===Objectives: === | ||
| + | *Primary: Develop second spawning population | ||
| + | *Provide rearing (grow-out) opportunities, augmentation of mainstem aggregations | ||
| + | |||
| + | ===Project History=== | ||
| + | Translocated 1,102 humpback chub (total): | ||
| + | *2009: 302 | ||
| + | *2010: 300 | ||
| + | *2011: 300 | ||
| + | *2013: 200 | ||
| + | June 2014 population estimate: ≈125 to 190 individuals (preliminary; all years represented) | ||
| + | |||
| + | ===Results=== | ||
| + | *Meeting Objectives for rearing/”grow-out” | ||
| + | *Annual growth greater than in the mainstem Colorado River but less than in the LCR 2 out of 3 years (2013-14 results pending) | ||
| + | *Large portion of mainstem captures at the mouth of Shinumo are translocated fish | ||
| + | *No reproduction (but fish were still young) | ||
| + | |||
| + | ===Galahad Point Fire – May-July 2014 [https://www.usbr.gov/uc/rm/amp/twg/mtgs/14oct28/Attach_11.pdf]=== | ||
| + | Shinumo Creek flooding (containing ash) reported in July and August | ||
| + | *PIT tag antenna destroyed in July | ||
| + | *>99% decline in fish, overall | ||
| + | *High density of rainbow trout in Merlin Abyss Creek (½ mile of undamaged habitat) | ||
| + | *Bluehead sucker and humpback chub believed to be extirpated | ||
| + | *Significant channel alteration, pools filled | ||
| + | *80-90% loss of riparian vegetation | ||
| + | |||
| + | ===Next Steps=== | ||
| + | *Remove remaining trout in Merlin Abyss | ||
| + | *Monitor habitat recovery | ||
| + | *In 3-5 years restore native fish community throughout watershed (humpback chub, speckled dace, bluehead sucker) | ||
| + | |||
| + | ==Bright Angel Creek (proposed; following [https://www.nps.gov/grca/learn/nature/trout-reduction.htm NPS trout reduction])== | ||
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| + | ==Havasu Creek above Beaver Falls (proposed; Conservation Measure)== | ||
| + | |||
| + | ==Mainstem translocations in Western Grand Canyon (proposed)== | ||
| + | ==Mainstem translocations at the LCR (proposed; Conservation Measure)== | ||
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[http://gcdamp.com/index.php?title=Humpback_Chub_Page The Humpback Chub Page] | [http://gcdamp.com/index.php?title=Humpback_Chub_Page The Humpback Chub Page] | ||
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Revision as of 10:23, 5 May 2017
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