My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
7801
CWCB
>
UCREFRP
>
Public
>
7801
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/14/2009 5:02:31 PM
Creation date
5/18/2009 12:06:30 AM
Metadata
Fields
Template:
UCREFRP
UCREFRP Catalog Number
7801
Author
Valdez, R. A.
Title
Synthesis of Winter Investigations of Endangered Fish in the Green River Below Flaming Gorge Dam.
USFW Year
1995.
USFW - Doc Type
\
Copyright Material
NO
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
198
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
in small instars unavailable to fish. Nevertheless, most fish maintain at least a low level of feeding <br />activity during winter, and sometimes switch to alternative, more available food sources. Schmidt et <br />aL (1987) found anadromous and freshwater fishes feeding predominantly on amphipods, the most <br />abundant crustacean in one of two river deltas surveyed. They also found reduced survival by fish <br />with low condition, i.e., lighter fish of a given length failed to attained sufficient energy reserves <br />during the preceding summer to survive winter. <br />Thompson (1989) found that lipid content ofage-0 Colorado squawfish (Ptychocheilus Lucius) <br />was inversely related to winter duration of fish 30 to 44 mm long, held in simulated water <br />temperature aquaria. Percent survival was significantly lower in starved than in fed fish, suggesting <br />that the size at which this species shifts to a piscivorous diet is critical to obtaining an energetically <br />profitable prey and to overwinter survival. Aclosely-related species, northern squawfish, was <br />observed feeding in winter on juvenile salmonids in the tailrace below a Columbia River hydroelectric <br />dam (Fraley et al. 1988). <br />39 <br />
The URL can be used to link to this page
Your browser does not support the video tag.