Data Set Citation:
When using this data, please cite the data package:
Hakoyama H , Fujimori H , Okamoto C , and Kodama S.
Compilation of Japanese fisheries statistics for the Japanese eel, Anguilla japonica, since 1894: a historical dataset for stock assessment
ERDP-2015-03.1.4 (https://db.cger.nies.go.jp/JaLTER/metacat/metacat/ERDP-2015-03.1.4/default)
General Information:
Title:Compilation of Japanese fisheries statistics for the Japanese eel, Anguilla japonica, since 1894: a historical dataset for stock assessment
Identifier:ERDP-2015-03.1.4
Abstract:
Fishery sustainability and the extinction risk of the Japanese eel, Anguilla japonica, are of global concern. The landings of the Japanese eel in Japan comprise a large part of the landings in East Asia. This study provides a compiled dataset of the annual fisheries statistics of the Japanese eel in Japan for stock assessment. The Japanese government has been recording Japanese eel statistics annually since 1984 in five series of annual reports by conducting systematic questionnaire surveys of fisheries managers and associations; however, most of these data are stored in analog format. The key variables in the dataset include the harvest weight of eels, the harvest weight and number of seeds for aquaculture, the number of eels stocked, and the number of management entities engaged in the eel fishery. The levels of spatial aggregation of the variables include the site (river and lake), prefecture, inland and coastal waters, and total in Japan. We also incorporated location data (latitude and longitude) of the site and prefecture into the dataset. Eel harvest includes primarily yellow eels (late juvenile stage) and silver eels (mature stage). Seed harvest in inland waters includes glass eels (intermediate stage between leptocephalus and elver) and elvers (early juvenile stage). Seed harvest from coastal waters comprises glass eels. This dataset provides information to assess long-term trends in the Japanese eel population.
Keywords:
  • fishery statistics time series
  • site-by-site statistics
  • eel harvest
  • seed harvest
  • eel stocking
  • fishery management entity
  • glass eel
  • elver
  • yellow eel
  • silver eel

Involved Parties

Data Set Owners:
Individual: Hiroshi Hakoyama
Organization:Fisheries Research Agency
Address:
1088 Komaki,
Ueda, Nagano 386-0031 Japan
Email Address:
hako@affrc.go.jp
Individual: Hiroka Fujimori
Organization:Fisheries Research Agency
Address:
1088 Komaki,
Ueda, Nagano 386-0031 Japan
Email Address:
fujimo@affrc.go.jp
Individual: Chiaki Okamoto
Organization:Fisheries Research Agency
Address:
1088 Komaki,
Ueda, Nagano 386-0031 Japan
Individual: Sakie Kodama
Organization:Fisheries Research Agency
Address:
1088 Komaki,
Ueda, Nagano 386-0031 Japan
Email Address:
skodama@affrc.go.jp
Data Set Contacts:
Individual: Hiroshi Hakoyama
Organization:Fisheries Research Agency
Address:
1088 Komaki,
Ueda, Nagano 386-0031 Japan
Email Address:
hako@affrc.go.jp
Associated Parties:
Organization:The Ministry of Agriculture, Forestry and Fisheries of Japan
Address:
1–2–1 Kasumigaseki,
Chiyoda, Tokyo 100–8950 Japan

Data Set Characteristics

Geographic Region:
Geographic Description:Japan
Bounding Coordinates:
West:  122.933611  degrees
East:  153.986389  degrees
North:  45.556944  degrees
South:  20.425278  degrees
Time Period:
Begin:
1894
End:
2015

Sampling, Processing and Quality Control Methods

Step by Step Procedures
Step 1:
Description:

The detailed information about methods can be seen on http://db.cger.nies.go.jp/JaLTER/ER_DataPapers/archives/2015/ERDP-2015-03/metadata

Data Set Usage Rights

1) Acceptable use. Use of the data set will be restricted to academic, research, educational, government, biodiversity conservation, or other non-profit professional purposes. 2) Citation. Data users should properly cite this data paper in any publications or in the metadata of any derived data products that were produced using the data set. As the metadata and the data set may be updated, the date the data was retrieved should also be included in the citation. 3) Collaboration. Data users are strongly encouraged to consider consultation, collaboration, and/or co-authorship with the authors.
Access Control:
Auth System:JaLTER
Order:allowFirst
Allow: [read] public
Metadata download: Ecological Metadata Language (EML) File