27710
AFSC/ABL: Frederick Sound Echo-integrated Trawl Survey, 2001 to 2004
AFSC/ABL: Frederick Sound Echo-integrated Trawl Survey, 2001 to 2004
Data Set
Published / External
12324
Auke Bay Laboratories
Project
Completed
Unknown
The acoustic trawl database for Frederick Sounds echo-trawl survey was conducted from 2001 to 2004. The surveys were conducted throughout most of the southern part of Stephens Passage and Frederick Sound in southeast Alaska and all their adjoining bays. Acoustic and trawl surveys were conducted every 3 months to verify acoustic signals and to collect biological data. This study was conducted to study the relationship between Steller sea lions (Eumetopias jubatus) and their prey. Acoustic equipment were calibrated before every trawl survey. Trawls were used to identify the fish species associated with a specific acoustic signal and to get length weight data per species. Acoustic data were analyzed by the same qualified acoustician throughout the surveys duration with calibrations entered into the analytical software after each calibration.
Trawl data were used to enumerate and identify all nekton found within the study area and to generate length frequencies, species composition and abundance by season. The acoustic data was use to generate biomass estimates for Pacific herring, Pacific hake and walleye pollock. Longlines were deployed to better identify and enumerate the benthic species not usually caught in pelagic trawls.
This dataset contains the data from the echo-integrated trawl survey from 2001 to 2004.
Loaded by FGDC Metadata Uploader, batch 7180, 10-05-2015 18:48
Theme
ISO 19115 Topic Category
biota
Theme
ITIS
Pacific hake
Theme
ITIS
Pacific herring
Theme
ITIS
walleye pollock
Theme
acoustics
Theme
demersal
Theme
echo integration trawl survey
Theme
longline
Theme
pelagic
Spatial
Geographic Names Information System
Alaska
Alaska Fisheries Science Center
Seattle
WA
USA
Data Set
None Planned
maps and data
The user is responsible for the results of any application of this data for other than its intended purpose.
unknown
unknown
unknown
Data Steward
2015-10-01
Person
Csepp, Dave
dave.csepp@noaa.gov
Distributor
2015-10-01
Person
Csepp, Dave
dave.csepp@noaa.gov
Metadata Contact
2015-10-05
Person
MC, Metadata Coordinators
AFSC.metadata@noaa.gov
Originator
2015-10-05
Person
Vollenweider, Johanna
joanna.volleweider@noaa.gov
Originator
2015-10-05
Person
Csepp, Dave
dave.csepp@noaa.gov
Point of Contact
2015-10-01
Person
Csepp, Dave
dave.csepp@noaa.gov
Ground Condition
-134.5
-133.5
57.167
56
Alaska, Southeast Alaska, Stephens Passage, Frederick Sound
Range
2001-06
2004-05
Unclassified
N/A
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.
https://www.ncei.noaa.gov/
NCEI to be determined
Microsoft Excel Spreadsheet
None
Acoustic equipment were tested through monthly calibrations. Data were checked throughout its analysis quantitatively and qualitatively throughout their analytical processes.
Contact the dataset POC for full QA/QC methodology
Yes
Unknown
Yes
Yes
yes
unknown
no delay
To Be Determined
unknown
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.
1
Echo integration-trawl surveys were conducted over 2700 km2 in Stephens Passage, Frederick Sound, and associated bays in southeastern Alaska every 3 months between June 2001 and May 2004.
2
Longline surveys were conducted in the same area from September 2003 to May 2004.
3
Standardized acoustic box surveys were run in Frederick sound and Stephens passage and zigzag transects in the bays. Trawls were run on all interesting sign, schools and layers to identify acoustic sign. A Simrad split beam 38 kHz system was used.
4
Samples were taken from both fishing methods for age, length, weight and nutritional analysis.
gov.noaa.nmfs.inport:27710
Emily Fergusson
2015-10-05T18:47:35
SysAdmin InPortAdmin
2023-05-30T18:10:19
2016-05-05
Alaska Fisheries Science Center
AFSC
7600 Sand Point Way N.E., Building 4
Seattle
WA
98115
USA
http://www.afsc.noaa.gov
0700-1700 Pacific Time
1001
Public
No
2016-05-05
1 Year
2017-05-05