My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
8105
CWCB
>
UCREFRP
>
Copyright
>
8105
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
8/11/2009 11:34:21 AM
Creation date
5/22/2009 12:31:02 PM
Metadata
Fields
Template:
UCREFRP
UCREFRP Catalog Number
8105
Author
Haines, G. B., D. W. Beyers and T. Modde.
Title
Estimation of Winter Survival, Movement and Dispersal of Young Colorado Squawfish in the Green River, Utah.
USFW Year
1998.
USFW - Doc Type
Recovery Program Project 36,
Copyright Material
YES
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
18
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
<br />SUBADULT HUMPBACK CHUB IN THE COLORADO RIVER <br /> <br />277 <br /> <br /> 100 <br /> 80 Reach 1 <br /> 60 <br /> 40 <br /> 20 <br /> 0 <br />.c 100 <br />0 80 Reach 2 <br />~ <br />Q; 60 <br />a. <br />.c 40 <br />u <br />ro 20 <br />t.) <br /> 0 <br /> 100 <br /> 80 <br /> 60 <br /> 40 <br /> 20 <br /> 0 <br /> <br /> <br /> <br />Figure 5. Relative densities of subadult humpback chub among shoreline types in reach I, reach 2 and reach 3. Be, bedrock; CB, <br />cobble; DF, debris fan; SA, sand; TS, talus; and VG, vegetation <br /> <br />Relationship between discharge and habitat condition <br /> <br />The MSLR showed that habitat conditions varied significantly with discharge for certain shoreline <br />types (Table IX). Overall, mean shoreline depth and velocity increased with increasing discharge, whereas <br />mean cover decreased (Figure 6). However, this trend was not consistent among shoreline types. Mean <br />depth and velocity of bedrock, debris fan, cobble and vegetation shorelines tended to increase with <br />increasing discharge, whereas they decreased within sand and talus shoreline types (Figure 7). Total cover <br />within bedrock, talus and debris fan shorelines decreased with increasing discharge, yet total cover within <br />cobble, sand and vegetation shorelines remained constant or increased. <br />When considered in conjunction with changes in the discharge regime, these results suggest that habitat <br />quality has decreased in the post-dam era. A comparison of the flow duration curves for the pre- and <br />post-dam periods show that the temporal distribution of discharge has changed such that mean daily <br />discharges are less extreme more of the time (Figure 8). Prior to dam closure, discharge was less than 140 <br />m3 s - I 20% of the time and less than 225 m3 s - I more than 50% of the time. Since construction of Glen <br />Canyon Dam, flows less than 140 m3 s -1 have occurred only 3% of the time, and flows less than 225 m3 <br />s - I have occurred only 12% of the time. <br /> <br />Table IX. Results of multivariate simple linear regression showing changes in depth, <br />velocity and cover with discharge. DF, degrees of freedom of the numerator and <br />denominator <br /> <br />Source <br /> <br />DF <br /> <br />Wilks' A <br /> <br />F <br /> <br />Discharge (Q) <br />Shoreline (S) <br />QxS <br /> <br />3,55 <br />15, 152 <br />15, 152 <br /> <br />0.539 <br />0.359 <br />0.366 <br /> <br />15.69 <br />4.56 <br />4.46 <br /> <br />P <br /> <br /><0.001 <br /><0.001 <br /><0.001 <br /> <br />@ 1998 John Wiley & Sons, Ltd. <br /> <br />Regul. Rivers: Res. Mgmt. 14: 267-284 (1998) <br />
The URL can be used to link to this page
Your browser does not support the video tag.