Bay Fish and Shellfish

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Blue Crab Abundance

Native Oyster Abundance

Striped Bass Abundance

Shad Abundance

Juvenile Menhaden Abundance

Metadata 

Chesapeake Bay Program Indicator Framework

Reporting Level Indicators

Indicator and Data Survey

A.  Category/Name/Source/Contact

(1) Category of Indicator

___ Factors Impacting Bay and Watershed Health

___ Restoration and Protection Efforts

___ Watershed Health

_x__ Bay Health

(2) Name of Indicator: Bay Fish & Shellfish Abundance Top Level Index

(3) Description of Dataset used to calculate percent of goal achieved:  

The Bay Fish and Shellfish Abundance Top Level Index incorporates scores for the following indicators:

Blue Crab Abundance

Striped Bass Abundance

Native Oyster Abundance

Shad Abundance

Percent achievement values for each indicator assessed in the Fish and Shellfish Abundance category were averaged to create the index score.

For what purpose(s) were the data collected? (e.g., tracking, research, or long-term monitoring.) Tracking progress towards a goal and long-term monitoring.

•Which parameters were measured directly? Percent goal achievement values for the component indicators are based on directly measured, monitored information.

•Which were obtained by calculation?  Percent achievement values for each indicator assessed in this category were averaged to create the index score.  Each indicator was assigned equal weight.  Values for indicators whose goal achievement status could not be quantified this year will be incorporated into an average for the index in future reports. Oyster and striped bass biomass were updated in 2009 using 2008 data (2009 data will not be available until 2011). The 2008 values were used to calculate the 2009 index score.

•Values that exceed 100 percent (crab: 1990-93 and 2009; striped bass: 2000-2009) were converted to 100 percent for the calculation of this index score.  The historic data featured in the blue crab indicator changed from the 2008 assessment due to adjustments in data used to calculate abundance levels. The historic data featured in the oyster indicator changed from the 2008 assessment due to revised data from VA, which replaced previously reported provisional data.  

(4) Source(s) of Data: Refer to the data and methods for the component indicators.

Blue Crab Abundance: www.chesapeakebay.net/status_bluecrab.aspx 

Striped Bass Abundance: www.chesapeakebay.net/status_stripedbass.aspx 

Native Oyster Abundance: www.chesapeakebay.net/status_oyster.aspx

Shad Returning to Chesapeake Bay: www.chesapeakebay.net/status_shad.aspx

Is the complete data set accessible, including metadata, data-dictionaries and embedded definitions?  If yes, please indicate where complete dataset can be obtained.   Refer to the data and methods for the component indicators.

(5) Custodian of Source Data (and Indicator, if different): Refer to the data and methods for the component indicators (urls listed in item 4, above).

(6) CBPO Contact:Nita Sylvester (sylvester.nita@epa.gov)

B.  Communication Questions

(complete either part 1, 2, or 3)

1.  Restoration and Protection Efforts indicators only

(7a) How much has been completed since 1985 (or baseline year)?  How much has been completed since 2000?

(8a) How much was done last year?

(9a) What is the current status in relation to a goal?

(10a) What is the key story told by this indicator?

(11a) Why is it important to report this information?

(12a) What detail and/or diagnostic indicators are related to this reporting level indicator? (Detail and diagnostic indicators can be spatially-specific, parameter-specific, temporally-specific information, etc.)

2.  Bay Health or Watershed Health indicators only

(7b) What is the long-term trend?  (Since start of data collection) Between 2000 and 2009 the Fish and Shellfish Index score increased from 48.16 percent to 59.21 percent of goal achieved.

(8b) What is the short-term trend? (10-year trend)  Between 2000 and 2009 the Fish and Shellfish Index score increased from 48.16 percent to 59.21 percent of goal achieved.

(9b) What is the current status in relation to a goal?  The Bay’s fish and shellfish abundance is measured with 5 indicators.  Quantitative restoration goals have been set for four of these indicators. When all of the goals are reached, it should mean restored fish and shellfish abundance.  Most fish and shellfish populations in the Bay remain far below desired levels. Overall, 59 percent of the goals have been met for fish and shellfish, a nine percent increase from 2008. 

(10b) What does this indicator tell us?  Most fish and shellfish populations in the Bay remain far below desired levels. Overall, 59 percent of the goals have been met for fish and shellfish, a nine percent increase from 2008.

(11b) Why is it important to report this information?  For the Chesapeake Bay to be considered restored, there must be healthy and abundant fish and shellfish. Blue crab, oyster, striped bass, shad and menhaden are some of the Bay’s most iconic species. These fish and shellfish are an essential part of the region’s commercial fisheries, recreational activities and cultural and culinary identity. They also play critical roles in the Bay’s ecosystem, and require clean water, ample aquatic habitat and properly managed fisheries to be healthy and reproduce. However, the indicators in this section reflect that the Chesapeake’s fish and shellfish suffer from polluted water, lack of habitat and disease. They also face other challenges such as overharvesting and lack of food.

(12b) What detail and/or diagnostic indicators are related to this top level index?

Blue Crab Abundance

Striped Bass Abundance

Native Oyster Abundance

Shad Abundance

3.  Factors Impacting Bay and Watershed Health indicators only

(7c) What is the long-term trend?  (since start of data collection)

(8c) What is the short-term trend? (3 to 5 year trend)

(9c) What is the current status?

(10c) What is the key story told by this indicator?

(11c) Why is it important to report this information?

(12c) What detail and/or diagnostic indicators are related to this reporting level indicator?

C.  Temporal Considerations

(13) Data Collection Date(s):  Refer to the data and methods for the component indicators

(14) Planned Update Frequency (e.g. - annual, bi-annual): Refer to the data and methods for the component indicators

(a) Source Data:

(b) Indicator:

(15) For annual reporting, month data is available for reporting: Refer to the data and methods for the component indicators

D.  Spatial Considerations

(16) Type of Geography of Source Data (point, line polygon, other): Refer to the data and methods for the component indicators

(17) Acceptable Level of Spatial Aggregation (e.g. - county, state, major basin, tributary basin, HUC): Refer to the data and methods for the component indicators

(18) Are there geographic areas with missing data?  If so, where? Refer to the data and methods for the component indicators

(19) The spatial extent of this indicator best described as:

(a) Chesapeake Bay (estuary)

(b) Chesapeake Bay Watershed

(c) Other (please describe): _______________________

Please submit any appropriate examples of how this information has been mapped or otherwise portrayed geographically in the past.

(20) Can appropriate diagnostic indicators be represented geographically? Refer to the data and methods for the component indicators

E.  Data Analysis and Interpretation

(Please provide appropriate references and location of documentation if hard to find.)

(21) Is the conceptual model used to transform these measurements into an indicator widely accepted as a scientifically sound representation of the phenomenon it indicates?  (i.e., how well do the data represent the phenomenon?)  Refer to the data and methods for the component indicators

(22) What is the process by which the raw data is summarized for development and presentation of the indicator?   Refer to the data and methods for the component indicators

(23) Are any tools required to generate the indicator data (e.g. - Interpolator, watershed model) Refer to the data and methods for the component indicators

(24) Are the computations widely accepted as a scientifically sound? Refer to the data and methods for the component indicators

(25) Have appropriate statistical methods been used to generalize or portray data beyond the time or spatial locations where measurements were made (e.g., statistical survey inference, no generalization is possible)?  Refer to the data and methods for the component indicators

(26) Are there established reference points, thresholds or ranges of values for this indicator that unambiguously reflect the desired state of the environment? (health/stressors only) Refer to the data and methods for the component indicators

F.  Data Quality

(Please provide appropriate references and location of documentation if hard to find.)

(27) Were the data collected according to an EPA-approved Quality Assurance Plan?  

If no, complete questions 28a – 28d:  Refer to the data and methods for the component indicators

(28a) Are the sampling design, monitoring plan and/or tracking system used to collect the data over time and space based on sound scientific principles? 

(28b) What documentation clearly and completely describes the underlying sampling and analytical procedures used?  

(28c) Are the sampling and analytical procedures widely accepted as scientifically and technically valid? 

(28d) To what extent are the procedures for quality assurance and quality control of the data documented and accessible? 

(29) Are the descriptions of the study or survey design clear, complete and sufficient to enable the study or survey to be reproduced? Refer to the data and methods for the component indicators

(30) Were the sampling and analysis methods performed consistently throughout the data record? Refer to the data and methods for the component indicators

(31) If datasets from two or more agencies are merged, are their sampling designs and methods comparable? Refer to the data and methods for the component indicators

(32) Are uncertainty measurements or estimates available for the indicator and/or the underlying data set?  Refer to the data and methods for the component indicators

(33) (Do the uncertainty and variability impact the conclusions that can be inferred from the data and the utility of the indicator? Refer to the data and methods for the component indicators

(34) Are there noteworthy limitations or gaps in the data record?  Please explain. Refer to the data and methods for the component indicators

G.  Additional Information

(optional)

(35) Please provide any other information about this indicator you believe is necessary to aid communication and any prevent potential miss-representation.

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