My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
9442
CWCB
>
UCREFRP
>
Public
>
9442
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/14/2009 5:02:35 PM
Creation date
5/22/2009 4:56:12 PM
Metadata
Fields
Template:
UCREFRP
UCREFRP Catalog Number
9442
Author
Muth, R. T. and T. E. Czapla.
Title
Workshop Summary
USFW Year
2002.
USFW - Doc Type
Designing Methods to Evaluate Stocked Fish in the Upper Colorado River, Green River, and San Juan River Subbasins.
Copyright Material
NO
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
33
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 />3.2 State of Utah <br /> <br />The State of Utah's stocking plan (Hudson 2001) was revised based on the recovery goals. The <br />plan calls for only stocking razorback sucker and bonytail. Utah is relying on other Program <br />activities to continue, e.g., instream flow protection, habitat restoration, and research and <br />monitoring. <br /> <br />The razorback sucker goal is to achieve 7,538 adults by year ten. This is expected to be <br />accomplished by stocking 18,500 razorback sucker each year for 5 years. The razorback sucker <br />will be > 300 mm TL at stocking and the product of the 25 x 25 breeding matrix. Theplan <br />assumes 50, 60, and 70 percent survival for age-3, age-4, and age-5 razorback sucker, <br />respectively. <br /> <br />The bony tail goal is to achieve 6,756 adults by year ten. This is expected to be accomplished by <br />stocking 16,280 bony tail each year for 7 years. The bony tail will average 200 mm TL. The plan <br />assumes 30, 50, 60, and 70 percent sUlvival for age-2, age-3, age-4, and age-5 bony taiL <br />respectively. <br /> <br />3.3 San Juan Program <br /> <br />This is not a State-based plan. It encompasses fish to be stocked throughout the San Juan River, <br />including river reaches in New Mexico, Colorado, and Utah. Two separate stocking efforts are <br />underway: razorback sucker (1994-present) and Colorado pikeminnow (1996-present). <br /> <br />Razorback sucker.- The objective ofthe 1994 Experimental Plan was to study survival, <br />dispersal, and retention. During 1994-1996,940 fish were stocked at four sites (RM 158.6, <br />136.6, 117.5, and 79.6). Results indicated that fish did survive and remained in the system. <br />Razorback sucker that were> 400 mm TL at stocking had the greatest survival. Some fish from <br />the downstream stocking sites ended up in Lake Powell. The objective of the 1997 <br />Augmentation Plan was to stock 15,900 razorback sucker between RM 159.0 and 0.0. Attempts <br />were made to stock fish> 300 mm TL, preferably> 400 mm TL; but in actuality, 82.3% stocked <br />were < 301 mm TL. Only 5,896 razorback sucker were stocked during 1997-2001, all at one <br />location (RM 158.6). Razorback sucker that were >400 mm TL at stocking had the greatest <br />survival. Spawning has been documented in 5 straight years (1997-2001). <br /> <br />Problems with the first two stocking efforts included: fish stocked were too small (small size- <br />class at stocking equals poor survival); and SJRRIP has no holding facilities/grow-out ponds, and <br />must take razorback sucker from other entities (on their schedule) and stock them directly into <br />the river, regardless of size. The solutions to these problems are that the SJRRIP Biology <br />Committee commits to not stocking any razorback sucker < 300 mm TL, the SJRRIP will <br />develop grow-out ponds (currently has 25 surface-acres, 9 more surface-acres planned; and fish <br />are reared for two growing seasons before being harvested), and aquaria are being used to rear <br />larval razorback sucker from Lake Mohave until they are large enough to be stocked into grow- <br />out ponds. <br /> <br />7 <br />
The URL can be used to link to this page
Your browser does not support the video tag.