Humpback Ch

Humpback Ch

Methods Rev

Methods Rev

An Independent Pane

An Independent Pane

Assessment of Methods B

Assessment of Methods B

Used By GCDAMP and the 

Used By GCDAMP and the 

Basin Endangered Fish

Basin Endangered Fish

Recovery Program Recovery Program
Conducted as Part of 

Conducted as Part of 

17 of the FY04 H

17 of the FY04 H

Comprehensive Actio

Comprehensive Actio

Approved by AM

Approved by AM

 Implications for FY04 Work Pla

Implications for FY04 Work Pla

 Implications for FY05 Budget a

Implications for FY05 Budget a

Plan
Report to the Adaptive Management W

Glen Canyon Dam Adaptive Managem

An Independent Review of Ongoing and Propose

to Assess the Status & Trend

of the Grand Canyon Population of the Humpba
Report of a Workshop Conducted During 6-7 No

at the National Center for Ecological Analysis anSanta Barbara, California 

Prepared by:

James F. Kitchell (Chair), Univ. of Wisconsin, Madison Churchill Grimes, National Marine Fisheries Service, Sa

Steven T. Lindley, National Marine Fisheri

es Service, Sa

David Otis, Iowa State University, Ames, IACarl Schwarz, Simon Fraser University, Burnaby, British Canada

Submitted: 5 December 2003
Process Process

 Scope of Work Prepared By GC

Scope of Work Prepared By G

Provided to Kitchell Provided to Kitchell

 Kitchell Invites and Organizes 

Kitchell Invites and Organizes 

 Kitchell Invites Participants and 

Kitchell Invites Participants and 

Written Materials to Panel Written Materials to Panel

 Workshop Convened at NCEA

Workshop Convened at NCEA

 Report Submitted to AMWG (U

Report Submitted to AMWG (U
Two Day Worksh

Two Day Worksh

 First Day Devoted to Informatio

First Day Devoted to Informatio

Gathering and Clarification Opp

Gathering and Clarification Op

for Panel Members for Panel Members

 Second Day Closed to Panel a

Second Day Closed to Panel a

Observers Observers 

 Subsequent Report Developed 

Subsequent Report Developed 

Members Members
Panel Recommenda

Panel Recommenda

The analytical methods currently The analytical methods currently employed in 

employed in 

are appropriate are appropriate pro tem pro tem, but could be impro

, but could be impro

become available. The Pane become available. The Panel encourages 

l encourage

open population methods as the databa

open population methods as the databa

recommends development of simu recommends development of simulation st

lation st

evaluate alternatives. In co evaluate alternatives. In combination, 

mbination, 

develop the “robust” approach develop the “robust” approach advocated b

advocated b

population biology (Pollock 1982). population biology (Pollock 1982).

The Panel finds little merit The Panel finds little merit in changing 

in changing 

practices. Sampling should occur when th

practices. Sampling should occur when th

of fish can be captured with the least harm 

can be captured with the least harm 

spring in the Grand Canyon and fall in the U

spring in the Grand Canyon and fall in the U
Panel Recommenda

Panel Recommenda

continued.... continued....

The ASMR model proposed and applied by Walters and C

appropriate way to deal with the biases introduced bcatchability related to age. It is based on the existing methodology of Pollock (1981) and offers “best avaisource of evidence regarding the status and trends of the Grand Canyon ecosystem. The ASMR method cthe Panel offers recommendations specific to future Canyon. 

The Panel encourages development of a workshop wh

GCMRC program participants can br

ing their d

alternative modeling approaches and evaluate estimwould allow sharing of expertise, discussion of difand help build consensus about criteria for de-listing 
Implications for FY04 

Implications for FY04 

 Concurrent Mainstem and LCR 

Concurrent Mainstem and LCR 

Sampling Not Recommended 

Sampling Not Recommended 

 Resources could be used to re

Resources could be used to re

modeling and sampling effort a

modeling and sampling effort a

further integration via workshop

further integration via workshop

Upper Basin & Recovery Progr

Upper Basin & Recovery Progr