AFSC/ABL: Lynn Canal Overwinter Acoustic Survey, 2004-2005
Data Set (DS) | Alaska Fisheries Science Center (AFSC)GUID: gov.noaa.nmfs.inport:27708 | Updated: May 30, 2023 | Published / External
Summary
Short Citation
Alaska Fisheries Science Center, 2024: AFSC/ABL: Lynn Canal Overwinter Acoustic Survey, 2004-2005, https://www.fisheries.noaa.gov/inport/item/27708.
Full Citation Examples
The acoustic trawl database for Lynn Canals echo-trawl survey was conducted from 2001 to 2004 throughout southern Lynn Canal in southeast Alaska. Acoustic surveys were conducted one day per month and trawl surveys were conducted every 3 months to verify acoustic signals and collect biological data. This study was conducted to study the relationship between Steller sea lions (Eumetopias jubatus) and their prey. Additional acoustic surveys were conducted throughout the winter of 2004 to 2005 on 6 consecutive days once a month in order to study forage fish hots spots. Acoustic equipment were calibrated before every trawl survey. Acoustic data were analyzed by the same qualified acoustician throughout the surveys duration with calibrations entered into the analytical software after each calibration. Trawls were used to identify the fish species associated with a specific acoustic signal and to get length weight data per species. Trawl data were also used to enumerate and identify all nekton found within the study area and to generate length frequencies, species composition and abundance by species and season. The acoustic data was use to generate biomass estimates for Pacific herring and walleye pollock. Longlines were deployed to better identify and enumerate the benthic species not usually caught in pelagic trawls.
Distribution Information
-
NCEI to be determined
There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed.
User must read and fully comprehend the metadata prior to use. Data should not be used beyond the limits of the source scale. Acknowledgement of NOAA, as the source from which these data were obtained, in any publications and/or other representations of these data is suggested.
Controlled Theme Keywords
biota
Child Items
No Child Items for this record.
Contact Information
Point of Contact
Dave Csepp
dave.csepp@noaa.gov
Metadata Contact
Metadata Coordinators MC
AFSC.metadata@noaa.gov
Extents
-135.1772° W,
-134.7554° E,
58.5819° N,
58.4156° S
Alaska, Southeast Alaska, Lynn Canal, Favorite Channel
2004-10 - 2005-04
Item Identification
Title: | AFSC/ABL: Lynn Canal Overwinter Acoustic Survey, 2004-2005 |
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Short Name: | AFSC/ABL: Lynn Canal Overwinter Acoustic Survey, 2004-2005 |
Status: | Completed |
Publication Date: | Unknown |
Abstract: |
The acoustic trawl database for Lynn Canals echo-trawl survey was conducted from 2001 to 2004 throughout southern Lynn Canal in southeast Alaska. Acoustic surveys were conducted one day per month and trawl surveys were conducted every 3 months to verify acoustic signals and collect biological data. This study was conducted to study the relationship between Steller sea lions (Eumetopias jubatus) and their prey. Additional acoustic surveys were conducted throughout the winter of 2004 to 2005 on 6 consecutive days once a month in order to study forage fish hots spots. Acoustic equipment were calibrated before every trawl survey. Acoustic data were analyzed by the same qualified acoustician throughout the surveys duration with calibrations entered into the analytical software after each calibration. Trawls were used to identify the fish species associated with a specific acoustic signal and to get length weight data per species. Trawl data were also used to enumerate and identify all nekton found within the study area and to generate length frequencies, species composition and abundance by species and season. The acoustic data was use to generate biomass estimates for Pacific herring and walleye pollock. Longlines were deployed to better identify and enumerate the benthic species not usually caught in pelagic trawls. |
Purpose: |
This dataset contains the data from the acoustic surveys from 2004 and 2005. |
Notes: |
Loaded by FGDC Metadata Uploader, batch 7178, 10-05-2015 18:14 |
Keywords
Theme Keywords
Thesaurus | Keyword |
---|---|
ISO 19115 Topic Category |
biota
|
UNCONTROLLED | |
ITIS | herring |
ITIS | Steller sea lion |
None | diet |
None | echo-integration |
None | foraging |
None | hydroacoustics |
None | Prey availability |
None | prey selection |
Spatial Keywords
Thesaurus | Keyword |
---|---|
UNCONTROLLED | |
Geographic Names Information System | Alaska |
Physical Location
Organization: | Alaska Fisheries Science Center |
---|---|
City: | Seattle |
State/Province: | WA |
Country: | USA |
Data Set Information
Data Set Scope Code: | Data Set |
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Maintenance Frequency: | None Planned |
Data Presentation Form: | Image (digital) |
Distribution Liability: |
The user is responsible for the results of any application of this data for other than its intended purpose. |
Support Roles
Data Steward
Date Effective From: | 2015-10-01 |
---|---|
Date Effective To: | |
Contact (Person): | Csepp, Dave |
Email Address: | dave.csepp@noaa.gov |
Distributor
Date Effective From: | 2015-10-01 |
---|---|
Date Effective To: | |
Contact (Person): | Csepp, Dave |
Email Address: | dave.csepp@noaa.gov |
Metadata Contact
Date Effective From: | 2015-10-05 |
---|---|
Date Effective To: | |
Contact (Person): | MC, Metadata Coordinators |
Email Address: | AFSC.metadata@noaa.gov |
Originator
Date Effective From: | 2015-10-05 |
---|---|
Date Effective To: | |
Contact (Person): | Csepp, Dave |
Email Address: | dave.csepp@noaa.gov |
Point of Contact
Date Effective From: | 2015-10-01 |
---|---|
Date Effective To: | |
Contact (Person): | Csepp, Dave |
Email Address: | dave.csepp@noaa.gov |
Extents
Currentness Reference: | Ground Condition |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -135.1772 | |
---|---|---|
E° Bound: | -134.7554 | |
N° Bound: | 58.5819 | |
S° Bound: | 58.4156 | |
Description |
Alaska, Southeast Alaska, Lynn Canal, Favorite Channel |
Extent Group 1 / Time Frame 1
Time Frame Type: | Range |
---|---|
Start: | 2004-10 |
End: | 2005-04 |
Access Information
Security Class: | Unclassified |
---|---|
Data Access Procedure: |
N/A |
Data Access Constraints: |
There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed. |
Data Use Constraints: |
User must read and fully comprehend the metadata prior to use. Data should not be used beyond the limits of the source scale. Acknowledgement of NOAA, as the source from which these data were obtained, in any publications and/or other representations of these data is suggested. |
Distribution Information
Distribution 1
Download URL: | https://www.ncei.noaa.gov/ |
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Distributor: | |
Description: |
NCEI to be determined |
Technical Environment
Description: |
Acoustic data raw files |
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Data Quality
Completeness Report: |
None |
---|---|
Conceptual Consistency: |
Acoustic equipment were tested through monthly calibrations. Data were checked throughout its analysis quantitatively and qualitatively throughout their analytical processes. |
Quality Control Procedures Employed: |
Contact the dataset POC for full QA/QC methodology |
Data Management
Have Resources for Management of these Data Been Identified?: | Yes |
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Approximate Percentage of Budget for these Data Devoted to Data Management: | Unknown |
Do these Data Comply with the Data Access Directive?: | Yes |
Is Access to the Data Limited Based on an Approved Waiver?: | Yes |
If Distributor (Data Hosting Service) is Needed, Please Indicate: | yes |
Approximate Delay Between Data Collection and Dissemination: | unknown |
If Delay is Longer than Latency of Automated Processing, Indicate Under What Authority Data Access is Delayed: |
no delay |
Actual or Planned Long-Term Data Archive Location: | To Be Determined |
If To Be Determined, Unable to Archive, or No Archiving Intended, Explain: |
NCEI site yet to be determined |
Approximate Delay Between Data Collection and Archiving: | unknown |
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?: |
IT Security and Contingency Plan for the system establishes procedures and applies to the functions, operations, and resources necessary to recover and restore data as hosted in the Western Regional Support Center in Seattle, Washington, following a disruption. |
Lineage
Process Steps
Process Step 1
Description: |
Gillnet herring schools using herring specific gillnet geometry. |
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Process Step 2
Description: |
Collect hydro-acoustic data using Simrad EK60 38 kHz split beam system; with appropriate calibration on standardized survey transects run daily for 6 days each month from October 2004 to April 2005. |
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Process Step 3
Description: |
Acoustic data were analyzed using Echoview software producing NASC values, school locations and size. |
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Process Step 4
Description: |
Age, length, weight, lipid and nutritional data were collected from herring samples collected. |
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Catalog Details
Catalog Item ID: | 27708 |
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GUID: | gov.noaa.nmfs.inport:27708 |
Metadata Record Created By: | Emily A Fergusson |
Metadata Record Created: | 2015-10-05 18:13+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2023-05-30 18:10+0000 |
Metadata Record Published: | 2016-05-18 |
Owner Org: | AFSC |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2016-05-18 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2017-05-18 |