My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
7228
CWCB
>
UCREFRP
>
Public
>
7228
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/14/2009 5:02:29 PM
Creation date
5/20/2009 9:31:46 AM
Metadata
Fields
Template:
UCREFRP
UCREFRP Catalog Number
7228
Author
Kaeding, L. R. and D. B. Osmundson.
Title
Biologically Defensible Flow Recommendations for the Maintenance and Enhancement of Colorado Squawfish Habitat in the '15-Mile' Reach of the Upper Colorado River During July, August and September.
USFW Year
1989.
USFW - Doc Type
Grand Junction, Colorado.
Copyright Material
NO
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
175
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
availability of such physical habitat as an impediment to the achievement of recovery <br />goals. <br />The argument that maintenance of a high availability of habitat for adult Colorado <br />squawfish is important to recovery is not entirely speculative. There are data that <br />suggest the availability of habitat for adult fish could have an important effect on the <br />size of the adult population. That argument is based on the observation that Colorado <br />squawfish can make extensive spawning movements and, more important, return to their <br />former home range subsequent to spawning (e.g., Miller et al. 1983). The return of <br />Colorado squawfish to feeding/wintering areas occupied during the non-spawning season <br />is remarkable because during its accomplishment the fish pass through river reaches that <br />contain suitable feeding/wintering habitat--habitats so used, in fact, by other Colorado <br />squawfish. Because such migrations require the fish to expend considerable energy, one <br />must ask why the adult squawfish simply do not remain in the adult feeding/wintering <br />habitats nearer their spawning area. This presumably would conserve energy and thus <br />would be advantageous to the survival of the individual fish. But the adults return to <br />their former feeding/wintering areas after spawning. The most dramatic example of this <br />homing behavior is the return of adult Colorado squawfish to the upper White River, <br />after they have traveled more than 150 miles to spawning sites on the lower Yampa <br />River (Miller et al. 1983). Numerous other, less dramatic examples have been recorded <br />throughout the upper basin. <br />A possible explanation for this major expenditure of energy to return to former <br />feeding/wintering areas is that it represents a needed disbursal of the adult population <br />throughout the range of the species. Without such disbursal, negative interactions-- <br />8
The URL can be used to link to this page
Your browser does not support the video tag.