Columbia Basin Fish and Wildlife Program Columbia Basin Fish and Wildlife Program
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Project Summary

Project 2007-358-00 - Estimating the detection efficiency of snorkeling for detecting anadromous salmonid parr
Project Number:
2007-358-00
Title:
Estimating the detection efficiency of snorkeling for detecting anadromous salmonid parr
Summary:
Although snorkeling is widely used to monitor anadromous salmonids, the bias and precision of snorkeling has rarely been assessed. We propose to develop sampling efficiency models to allow correction of extant and future data with systemwide application.
Proposer:
None
Proponent Orgs:
US Forest Service (USFS) (Govt - Federal)
Starting FY:
2007
Ending FY:
2011
BPA PM:
None
Stage:
Area:
Province Subbasin %
Basinwide - 100.00%
Purpose:
Programmatic
Emphasis:
RM and E
Focal Species:
Species Benefit:
Anadromous: 100.0%   Resident: 0.0%   Wildlife: 0.0%
Tags:
None
Special:
None
BiOp Association:
None

No photos have been uploaded yet for this project.

The table content is updated frequently and thus contains more recent information than what was in the original proposal reviewed by ISRP and Council.

Review: FY07-09 Solicitation Review

Council Recommendation

Assessment Number: 2007-358-00-NPCC-20090924
Project: 2007-358-00 - Estimating the detection efficiency of snorkeling for detecting anadromous salmonid parr
Review: FY07-09 Solicitation Review
Approved Date: 10/23/2006
Recommendation: Do Not Fund
Comments:

Independent Scientific Review Panel Assessment

Assessment Number: 2007-358-00-ISRP-20060831
Project: 2007-358-00 - Estimating the detection efficiency of snorkeling for detecting anadromous salmonid parr
Review: FY07-09 Solicitation Review
Completed Date: 8/31/2006
Final Round ISRP Date: None
Final Round ISRP Rating: Meets Scientific Review Criteria
Final Round ISRP Comment:
The scientific requirement for accurate and precise estimates of juvenile salmon abundance is well explained. Snorkeling is widely used as a juvenile salmonid census technique, especially in areas with listed species, because it does not involve handling individuals. However, in many cases there is no basis for estimating the degree to which snorkeling underestimates the actual number of fish present (it will likely always be an underestimate). This proposal outlines a study that will facilitate statistical models that allow snorkeling estimates to be corrected to provide more precise and accurate population censuses. The approach to resolving the uncertainty of the estimates appears sound. The ability to more accurately census juvenile salmonid populations is critical to status and trend monitoring, as well as estimating restoration effectiveness. This project has the potential to significantly improve monitoring accuracy by providing tools to correct snorkel estimates.

Table 1 provides a very nice summary of the uses of juvenile abundance data in management. The proposal describes its general relevance to other projects that involve snorkel estimates (there are apparently 17) and also the major monitoring efforts such as CSMEP, the NOAA Fisheries Pilot projects, and INPMEP.

Methods were thoroughly explained, especially the techniques used to construct the statistical models. This project will use ten-fold cross validation to evaluate model accuracy. It was nice to read a proposal that provided an adequate description of product quality. The sampling plan and analysis was excellent. The sequence of decision-making on the statistical analysis is the appropriate way to proceed in these circumstances. The presentation of the sampling, analysis, and decision-making is the best among other comparable systemwide proposals.

With regard to the effects of water clarity on snorkel enumeration, why not just use a turbidimeter instead of the secchi-disk method? It might be a bit less subjective.

Many of the habitat measurements described on pages 10-11 were not related explicitly to the goals of the proposal. How will this information factor into model development?
Documentation Links:

Legal Assessment (In-Lieu)

Assessment Number: 2007-358-00-INLIEU-20090521
Project Number: 2007-358-00
Review: FY07-09 Solicitation Review
Completed Date: 10/6/2006
In Lieu Rating: Problems May Exist
Cost Share Rating: 3 - Does not appear reasonable
Comment: Effectiveness of snorkel surveys, other entities authorized/required (eg fishery managers, other entities that rely on snorkel survey data).

Capital Assessment

Assessment Number: 2007-358-00-CAPITAL-20090618
Project Number: 2007-358-00
Review: FY07-09 Solicitation Review
Completed Date: 2/27/2007
Capital Rating: Does Not Qualify for Capital Funding
Capital Asset Category: None
Comment: None

Project Relationships: None