My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
9314
CWCB
>
UCREFRP
>
Public
>
9314
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/14/2009 5:02:34 PM
Creation date
5/17/2009 11:52:58 PM
Metadata
Fields
Template:
UCREFRP
UCREFRP Catalog Number
9314
Author
Wick, E. J. and J. A. Hawkins.
Title
Colorado Squawfish Winter Habitat Study.
USFW Year
1989.
USFW - Doc Type
Fort Collins.
Copyright Material
NO
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
43
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
considered even if only a single introduction is to be made. Precautions that will be <br />taken during propagation and stocking are summarized in Box 8. <br />Box 8. Precautions to be taken during propagation and when stocking <br />endangered and candidate fish. (Listed in priority order) <br />1. Precautions must be taken to prevent escapement of fish from <br />refugia or captive propagation facilities. <br />2. Stocking of captive-reared fish will be conducted only in locations <br />where it can be demonstrated that such stocking will not adversely <br />and significantly affect any indigenous fish population or stock <br />of the same or different species <br />3. Supplemental stocking (i.e., experimental, augmentation, and <br />restoration stocking) will be restricted to locations with suitable <br />habitat that will support a viable population or stock, or to <br />historic habitats. <br />4. All captive-reared fish will be marked before initial release <br />and stocked as equal family lots from pedigreed mat.ings so that <br />an adequate evaluation of stocking can be made. <br />5. Large-scale augmentation or restoration stocking will be done only <br />when knowledge of life history and ecological requirements of the <br />target species is known sufficiently well to predict the likelihood <br />of stocking success. <br />6. Any proposed stocking will be described in a reintroduction, <br />augmentation plan that is approved by the Recovery Team and <br />Regional Director, and covered by a Federal Fish and Wildlife <br />Permit or a supplemental permit. <br />H. Effective Population Size in Captive Propagation The effective population size <br />(Ne) is a key parameter in conservation of genetic diversity. The rate of <br />inbreeding and the loss of genetic heterozygosity is proportional to the inverse <br />of the effective population size (Ryman and Laikre 1991). The effective <br />population size can be calculated using the following formula Mande and <br />Barrowclough 1987): <br />4XNMxNF <br />Ne = (NM + NF) <br />20
The URL can be used to link to this page
Your browser does not support the video tag.