| Abstract: | The Colorado River Basin supports one of the most distinctive fish communities in North America, including the federally endangered humpback chub (Gila cypha). One of only six remaining populations of this fish is found in Grand Canyon, Arizona. U.S. Geological Survey scientists and their cooperators are responsible for monitoring the Grand Canyon population. Analysis of recently collected data indicates that the number of Grand Canyon adult humpback chub - fish 4 years old and older and capable of reproduction - increased approximately 50 percent between 2001 and 2008. When possible model error is considered, the estimated number of adult chub in the Grand Canyon population is between 6,000 and 10,000. The most likely number is estimated at 7,650 individuals. |
| Genre: | USGS Numbered Series |
| ProdID: | 97487 |
| Citation Author: | Andersen, Matthew E. |
| Citation Contributing Office: | Southwest Biological Science Center |
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| Citation Day: | |
| Citation Edition: | Version 1.0 |
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| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0373000 |
| Citation LatS: | 0350000 |
| Citation LonE: | -1103000 |
| Citation LonW: | -1143000 |
| Citation Month: | Apr |
| Citation No Pagination: | |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | 2 p. |
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| Citation Public Comments: | The science provider to the Glen Canyon Dam Adaptive Management Program |
| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Fact Sheet |
| Citation Series Code: | FS |
| Citation Series Number: | 2009-3035 |
| Citation Search Results Text: | Status and Trends of the Grand Canyon Population of Humpback Chub; 2009; FS; 2009-3035; Andersen, Matthew E. |
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| Citation Volume: | |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Status and Trends of the Grand Canyon Population of Humpback Chub; 2009; FS; 2009-3035; Andersen, Matthew E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/fs_2009_3035.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/fs/2009/3035/ |
| Date Other: | Sat, 9 May 2009 00:00 -0500 |
| Publisher: | U.S. Geological Survey |
