26095
Japanese longline observer data-USEEZ 1978-1988
Japanese Longline Observer
Project
Published / External
21322
Fisheries Sampling Branch
Project
Completed
This data set contains data that were collected by trained observers aboard Japanese pelagic longline vessels operating in the US EEZ. Observers collected information on the catch, bycatch, and fishing effort details of these fishing operations. Of particular concern were catches of bluefin tuna, and bycatch of marlins.
Theme
Japanese
Theme
longline
Theme
observer
Temporal
1978-1988
Spatial
Gulf of Mexico
Spatial
northwestern Atlanitc
Southeast Fisheries Science Center
Miami
FL
USA
Data steward's PC
Project
Yes
Magnusun-Stevens Act
Observer
Federal
Paper
Data Steward
2006
Person
Beerkircher, Larry
lawrence.r.beerkircher@noaa.gov
75 Virginia Beach Drive
Miami
FL
33149
305-361-4290
Email best or office phone 305-361-4290
Distributor
2006
Organization
Southeast Fisheries Science Center
SEFSC
75 Virginia Beach Drive
Miami
FL
33149
USA
(305)361-5761
https://www.fisheries.noaa.gov/about/southeast-fisheries-science-center
About SEFSC
Online Resource
8:00 a.m. - 4:30 p.m. EST
Metadata Contact
2006
Person
Beerkircher, Larry
lawrence.r.beerkircher@noaa.gov
75 Virginia Beach Drive
Miami
FL
33149
305-361-4290
Point of Contact
2006
Person
Beerkircher, Larry
lawrence.r.beerkircher@noaa.gov
75 Virginia Beach Drive
Miami
FL
33149
305-361-4290
-96
-60
42
23
Range
1978
1988
Confidential
Only available to those with a valid non-disclosure agreement in place with the SEFSC, as specified in NOAA Administrative Order 216-100
Any paper copies of data set must be keep in a locked storage cabinet accessible only to NDA holder, within a locked office or lab that is accessible only to a limited number of the NDA holder's associates. Electronic copies of the data must be stored on a PC that is password protected/restricted to the NDA holder and located in a locked office or lab that is accessible only to a limited number of the NDA holder's associates. Alternatively the data can be stored on an oracle type data storage with access to the system restricted and access to the specific data table/tables restricted to the NDA holder.
Need SEFSC NDA. NDAs can only be granted to NOAA employees, contractors, or grantee's with a need for the data (see NOAA Administrative Order 216-100) .
Contact data steward Beerkircher or SEFSC Miami Laboratory Fisheries Statistics Division Chief.
None for NDA holders with a specific need for the data. No access permitted for non NDA holders. Aggregated data may be available, contact data steward.
Usually defined in the NDA. Publicly available research results must conform to current aggregation procedures (rule of three).
none
none
http://spo.nmfs.noaa.gov/mfr4110/mfr41103.pdf
Online Resource
PDF
Published research article
http://www.sefsc.noaa.gov/turtles/PR_Witzell_1984_MFRev.pdf
Online Resource
PDF
Published research article
2015-07-30
Beerkircher, Larry
No clean copy of the electronic data set can be found. Available electronic files have some undefined variables and others have some format issues. Original data collection forms appear to exist, but it is not known if these forms are complete. No resources can be identified to resolve these issues.
Representativeness: It is unknown if JPLL data are likely representative of the fleet’s catch and effort characteristics, at the very least some “observer effect” (vessels altering fishing practices when an observer is on board) is possible. No documentation exists on how these vessels were selected for coverage. Some documentation indicates a 20% coverage rate was targeted. There are no known quantitative analyses of the representativeness of this data set.
Accuracy: Nothing is known about the degree of agreement between individual measurements in the JPLL data set and the true measurements, as the observer colleting the data is the sole source of the information and it cannot be cross checked with alternate sources.
Analytical Accuracy: See above. The accuracy of analytical results to the “true” values cannot be determined as the true values cannot be calculated without 100 % observer coverage and multiple observers on each vessel. Neither situation ever occurred during collection of JPLL data.
Quantitative Limits: The JPLL data system was devised to collect a large amount of variables for use in many different types of analyses rather than a single purpose system designed to estimate or produce one set of values. Further, the quantitative limits for many values would be dependent on the frequency of the observations, which is highly species dependent.
Bias: There have been no quantitative studies to detect potential bias in JPLL.
Comparability: There are no known comparable data sets to JPLL; even the Japanese do not seem to have the vessel catch logs for this fleet from this era
Completeness Measure: All vessel hauls were planned to be observed during an observer deployment; however it is likely that at least some hauls were unobserved due to observer sickness, and even during an observed haul some animals might not have been seen. There is nothing in the data that allows quantification of this.
Precision: There have been no quantitative studies to determine the precision of observations in JPLL. Since the “instrument” used to quantify the variable is generally the human observer themselves, measures of precision would require the same observer to record a variable, of known property, multiple times under the exact same conditions. Such studies are not practical.
Analytical Precision: See above, no information available.
Field Precision: See above, no information available.
Sensitivity: Since the “instrument” used to quantify the variables is generally the human observer themselves, sensitivity largely relies on the ability of the individual observer to see small variations in conditions, morphology, lengths, etc. No analyses of this characteristic have been conducted for this data collection system specifically or for fisheries observation systems in general.
Detection Limits: Not applicable. Variables collected in the JPLL system where specifically chosen such that they could be consistently and reliably determined by the human observer themselves.
N/A
N/A
2015-07-30
Beerkircher, Larry
Where any reports published as a result of these data collections?
Lopez at al: The Japanese longline fishery in the Gulf of Mexico, 1978
Witzell: The Incidental Capture of Sea Turtles in the Atlantic U.S. Fishery Conservation Zone by the Japanese Tuna Longline Fleet, 1978-81
SEE URLS
27632
Data Set
JAPANSE LONGLINE OBSERVER JPLL
27623
Data Set
JLL_EFFORT
gov.noaa.nmfs.inport:26095
Lee Weinberger
2015-07-24T15:19:20
SysAdmin InPortAdmin
2022-08-09T17:11:11
2021-05-06
Southeast Fisheries Science Center
SEFSC
75 Virginia Beach Drive
Miami
FL
33149
USA
(305)361-5761
www.sefsc.noaa.gov
8:00 a.m. - 4:30 p.m. EST
1001
Public
No
2021-05-06
1 Year
2022-05-06