My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
7990
CWCB
>
UCREFRP
>
Public
>
7990
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/14/2009 5:02:32 PM
Creation date
5/24/2009 7:10:23 AM
Metadata
Fields
Template:
UCREFRP
UCREFRP Catalog Number
7990
Author
Tyus, H. M.
Title
Razorback Sucker (
USFW Year
1997.
Copyright Material
NO
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
124
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
1 <br />slow runs, °slacc waters" and eddies, in depths of 0.6 to 1.4 m (2.0 to 4.6 ft) and <br />velocities of 0.03 to 0:33 m/s (0.1 to 1.1 ft/s; Valdez and Masslich 1989). <br />In the upper Colorado River, near Grand Junction, Osmundson and Kaeding (19.89) <br />reported similar habitat use: pools and slow eddies from November through April, runs <br />and pools from July through October,-runs and backwaters during May, and <br />backwaters, eddies, and flooded gravel pits during June. Selection of depths changed <br />seasonally; use of relatively shallow water occurred during spring and use of deeper <br />water during winter. Mean depths were 0.9 to 0.99 m (3.0-3.3 ft) during May and June, <br />1.62 to 1.65 m (5.3-5.4 ft) from August through September, and 1.83 to 2.16 m (6.6-7.1 <br />ft) from November through April (Osmundson and Kaeding 1989). <br />Adult razorback suckers use a great variety of habitats, including lower gradient, low- <br />vetocity riverine sections of canyon-bound areas. The fish also have been tracked <br />moving through whitewater habitats (Tyus and Karp 1990), but spent little time there. <br />There are few historic records of razorback suckers in Grand and Marble canyons of <br />the lower Colorado River, possibly due to lack of historic sampling in these <br />inaccessible whitewater canyons (Minckley et al. 1991). Lanigan and Tyus (1989) <br />suggested that n~zorback sucker distribution in the Green River may be constrained by <br />whitewater canyons that either impede migration or do not have suitable habitat. <br />Although the fish has been extirpated from its historic riverine habitats in the lower <br />16 <br /> <br /> <br /> <br /> <br />s <br /> <br /> <br /> <br /> <br /> <br />a <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />
The URL can be used to link to this page
Your browser does not support the video tag.