Monthly catch of Southern Bluefin Tuna in the Southern hemisphere oceans (1975-2015) by longliners aggregated by 5° squares (CCSBT level 0)

This dataset lists catch of Southern Bluefin Tuna (SBT) from the Commission for the Conservation of Southern Bluefin Tuna (CCSBT) for the commercial longline fisheries from 1965 to 2015. Catches are stratified by year, month, fishing gear, vessel flag reporting country, area (5° squares).It corresponds to the catch part of the CCSBT catch-and-effort (task2) dataset.

This dataset was downloaded on the CCSBT website. It was then restructured to be in line with the Sardara database structure (columns normalization, names, etc.). However the content of data and the code lists were kept exactly as their are available in the source dataset.

The description below (caracteristics, specific issues and problems that need to be taken into account) is extracted from the CCSBT web page where the dataset has been downloaded.

Caracteristics, specific issues and problems that need to be taken into account :

It should be noted that the data for individual Flag States and fishing entities available here may differ to data that they provided to other organisations. This is in part due to the data manipulations conducted by the CCSBT in producing this dataset (a variety of data sources were used, requiring a range of correction and raising techniques) and in part due to differences in the data provided by individual Flag States and fishing entities to the CCSBT and to other organisations. In particular, the post 1994 SBT data provided by Japan to the CCSBT differs from the post 1994 SBT data that Japan provides to other regional fishery management organisations. The data that Japan provides to CCSBT takes advantage of a Real Time Monitoring Program for SBT to collect daily catch and effort reports from SBT targeting fishing vessels and this is considered to minimise the time lag in availability of the Japanese SBT log book data.

It should also be noted that the catch data provided here do not cover the full time-series of SBT fishing by each Flag State and fishing entity, nor do they contain the entire SBT catch for any year. In addition, prior to 1996, the SBT catch reported here for the Fishing Entity of Taiwan has been estimated from mixed bluefin tuna (species not reported separately) data. The reason for incomplete time series is that the catch and effort data is compiled from vessel logbooks or similar detailed records that may not have been collected throughout a nations fishing history. Similarly, in some years, there may not be complete coverage of a particular fleet by catch and effort data collection systems.

It should be further noted that in cases where information on the number of vessels has been provided to the Secretariat, the subsets provided here are made up of observations with a minimum of three vessels per strata. This is due to the CCSBT confidentiality rules.

For some CCSBT Members, the data provided here are not restricted to fishing that targeted SBT. Instead, the data represents all longline fishing in which catches of SBT were feasible. This includes fishing that targeted SBT, fishing that targeted other tuna or tuna like species, and/or fishing conducted in strata (year/month/area) where SBT were also taken. As a consequence, there are many fishing records with no SBT catch. Note: the extent to which fishing effort associated with past unreported catches has been reported is currently unknown. This causes difficulties for a meaningful interpretation of catch per unit effort trends from these data.

It should also be noted that the weight of SBT retained in these data are usually only approximate visual estimates of the weights.

Dataset extent

Map data © OpenStreetMap contributors
Tiles by MapBox
Tags
Data and Resources
To access the resources you must log in
  • southern_hemisphere_oceans_catch_1965_01_01_201 ...

    Download data (ZIP archive containing CSV file + metadata) from the i-Marine...

    The resource: 'southern_hemisphere_oceans_ ...' is not accessible as guest user. You must login to access it!
  • data: CSV from WFSWFS

    Download data (CSV) from WFS (Web Feature Service) - see service/operation...

    The resource: 'data: CSV from WFS' is not accessible as guest user. You must login to access it!
  • data (aggregated): CSV from WFSWFS

    Download aggregated data (CSV) from WFS (Web Feature Service) - see...

    The resource: 'data (aggregated): CSV ...' is not accessible as guest user. You must login to access it!
  • tunaatlas_ccsbt:southern_hemisphere_oceans_catc ...WMS

    Visualize maps from WMS (Web Map Service) - see service/operation metadata...

    The resource: 'tunaatlas_ccsbt:southern_he ...' is not accessible as guest user. You must login to access it!
  • tunaatlas_ccsbt:southern_hemisphere_oceans_catc ...WMS

    Visualize aggregated maps from WMS (Web Map Service) - see service/operation...

    The resource: 'tunaatlas_ccsbt:southern_he ...' is not accessible as guest user. You must login to access it!
  • The code (R or SQL) used to generate this dataset

    The code (R or SQL) which has been used to generate this dataset can be...

    The resource: 'The code (R or SQL) used ...' is not accessible as guest user. You must login to access it!
  • Documentation: metadata and data dictionnary ...PDF

    This document describes the data dictionnary (vocabulary used for the tables...

    The resource: 'Documentation: metadata ...' is not accessible as guest user. You must login to access it!
  • Tuna Atlas Website

    Get more information on the Tuna Atlas project. The Tuna Atlas Website is...

    The resource: 'Tuna Atlas Website' is not accessible as guest user. You must login to access it!
  • OGC metadata: HTML view in Geonetwork

    Visualize metadata HTML view in Geonetwork

    The resource: 'OGC metadata: HTML view in ...' is not accessible as guest user. You must login to access it!
  • OGC metadata: XML from CSWcsw

    Visualize metadata XML from CSW (Catalogue Service for the Web)

    The resource: 'OGC metadata: XML from CSW' is not accessible as guest user. You must login to access it!
  • southern_hemisphere_oceans_catch_5deg_1m_ll_tun ...

    Data Structure Definition (ISO 19110)

    The resource: 'southern_hemisphere_oceans_ ...' is not accessible as guest user. You must login to access it!
Geonetwork Links
Field Value
GN_Metadata_Show http://tunaatlas.d4science.org/geonetwork/srv/en/catalog.search#/metadata/southern_hemisphere_oceans_catch_5deg_1m_ll_tunaatlasCCSBT_level0
GN_Metadata_Source http://tunaatlas.d4science.org/geonetwork/srv/en/xml.metadata.get?uuid=southern_hemisphere_oceans_catch_5deg_1m_ll_tunaatlasCCSBT_level0
GN_URL http://tunaatlas.d4science.org/geonetwork
Additional Info
Field Value
access_constraints []
bbox-east-long 185
bbox-north-lat 0
bbox-south-lat -60
bbox-west-long -180
contact-email ird@ird.fr
coupled-resource
[]
dataset-reference-date
[{"type": "revision", "value": "2018-02-06"}]
frequency-of-update annually
graphic-preview-description Thumbnail from WMS / Geoserver
graphic-preview-file https://geoserver-tunaatlas.d4science.org/geoserver/wms?service=WMS&version=1.3.0&request=GetMap&layers=tunaatlas:bathymetry,tunaatlas_ccsbt:southern_hemisphere_oceans_catch_5deg_1m_ll_tunaatlasCCSBT_level0_aggregated,tunaatlas:continent&styles=&bbox=-60,-180,0,185&width=768&height=768&srs=EPSG:4326&format=image/png
graphic-preview-type WWW:LINK-1.0-http--link
GUID southern_hemisphere_oceans_catch_5deg_1m_ll_tunaatlasCCSBT_level0
licence []
metadata-date 2018-02-06T16:44:45
metadata-language eng
point_of_contact 1 IRD -, ird@ird.fr
point_of_contact 2 Millar Colin, CMillar@ccsbt.org
progress tentative
resource-type dataset
responsible-party
[{"name": "Institut de recherche pour le d\u00e9veloppement (IRD)", "roles": ["publisher"]}, {"name": "Commission for the Conservation of Southern Bluefin Tuna (CCSBT)", "roles": ["originator"]}]
spatial
{"type": "Polygon", "coordinates": [[[-180.0, -60.0], [185.0, -60.0], [185.0, 0.0], [-180.0, 0.0], [-180.0, -60.0]]]}
spatial-data-service-type OGC Web-Service
spatial_harvester true
system:type Dataset
temporal-extent-begin 1965-01-01T00:00:00
temporal-extent-end 2016-01-01T00:00:00
Management Info
Field Value
Author Commission for the Conservation of Southern Bluefin Tuna (CCSBT),Observatory of Exploited Tropical Pelagic Ecosystems, MARBEC Research Unit 248, IRD,IRD, UMR MARBEC & COI,FAO - Fisheries and Aquaculture Department (FI). Fisheries and Aquaculture Policy and Resources Division (FIA)
Maintainer iMarine Catalogue Manager
Last Updated 2 September 2019, 16:32 (CEST)
Created 2 September 2019, 16:32 (CEST)