11402: Rev 1: WE D: Work Element Summary

Work Element Summary PDF

Select a work element:

Basics

Contract Number:

11402

Contract Title:

2002-037-00 CHARACTERIZE DIST. & STATUS OF FRESHWATER MUSSELS

Contract Start Date:

9/30/2002

Contract End Date:

9/30/2005

WE ID:

162. Analyze/Interpret Data

Work Element Usage Report

Title:

D: 162 - Quantitatively assess age structure of freshwater mussels in the Middle Fork John Day River. (CTUIR)

Description:

D. The scope of this work is to determine the age structure of mussel populations in the Middle Fork John Day River. Using the age estimates calculated in Work Element C, we would determine the age structure of mussel aggregations in the river. From these analyses we will attempt to 1) quantify mortality and recruitment rates for these populations; 2) identify the role of recruitment and mortality variations over time in determining the age structure; and 3) examine these variations for relationships with environmental variable such as discharge and fish host populations. In 2003 a map of relative mussel densities was produced from over 80 locations in these rivers. We will use a sub-set of these sites to measure and collect mussels for quantitatively aging populations in the rivers. These efforts are crucial to understanding the population dynamics of freshwater mussels in these systems, and for conservation efforts

WE Agreement Type:

Contracted

Deliverable Specification:

Analysis of population age structure of Margaritifera, Anodonta and Gonidea in the Middle Fork John Day River using techniques from WE C and build population structure histograms and relate environmental factors to population recruitment success.

WSE Effective Budget:

$7,000

% of Total WSE Effective Budget:

3.39%

WSE Start:

07/01/2005

WSE End:

08/31/2005

WSE Completion:

WSE Progress:

Other

WSE ID Continued From:

n/a

WSE ID Continued To:

n/a

Finite or Recurring:

Recurring

Budget History

SOWRevision	Planned	Updated	Contractor Comments (optional)	BPA Comments (optional)
Work Element Budget (Current Performance Period)	$7,000	$7,000

Milestones

4 Milestones

Sort	Type	Title	Start	End	Status	Modified By	Modified Date
A		Calculate age from length measurements	7/1/2005	7/15/2005	Active
		Description: To determine the age and growth characteristics of the populations, we will plot measured ages versus shell lengths. Best-fit curves will be fitted (by least squares) to the shell length-at-age data, and the best one chosen for use. This will allow us to age the populations measured with sacrificing the fewest specimens possible.
B		Produce age histograms	7/16/2005	7/31/2005	Active
		Description: From age estimates, histograms will be constructed for each mussel aggregation measured in the Middle Fork John Day. By obtaining population age structures, we hope to better understand how variations in age distributions correspond to environmental changes.
C		Correlate population age structure with environmental variables	8/1/2005	8/31/2005	Active
		Description: Population age structure data will be correlated with appropriate environmental data such as discharge and habitat alterations, in an attempt to determine recruitment success and habitat suitability in various parts of the channels.
D	DELIV	Deliverable complete			Active	Deborah Docherty (Inactive)	11/8/2005 10:31:52 AM
		Description: Analysis of population age structure of Margaritifera, Anodonta and Gonidea in the Middle Fork John Day River using techniques from WE C and build population structure histograms and relate environmental factors to population recruitment success.

Metrics

Implementation Metrics

Metric	Planned	Actual	Contractor Comments	Measures	HLIs
1464. Primary R, M, and E Focal Strategy [Population Status, Hydrosystem, Tributary Habitat, Estuary/Ocean, Harvest, Hatchery, Predation, Multiple Strategies]		Tributaries
1472. Primary R, M, and E Type [Status and Trend Monitoring, Action Effectiveness Research, Uncertainties Research, Project Implementation/ Compliance Monitoring]		Uncertainty Research
1478. Secondary R, M, and E Type [Status and Trend Monitoring, Action Effectiveness Research, Uncertainties Research, Project Implementation/ Compliance Monitoring]		Status and Trend Monitoring

Location

<a target='blank' href='https://www.monitoringresources.org/Designer/Design/Index'>Location data for Area of Inference (AOI) should be entered into MonitoringResources.org. Click here to go to that site.</a>

Focal Species

Primary Focal Species:

None

Secondary Focal Species:

None

Environmental Compliance

This work element does not require Environmental Compliance

RM&E Metadata

Data Repositories:

Study Plan:

Area of Inference:

Please correct the errors noted below.

Implementation Metrics