Description

This form provides for the monthly reporting of size-frequency estimates for IOTC species, as well as common sharks and other bycatch species caught in association with IOTC fisheries. The form allows reporting updated data for a single fishery.

Click here to download a blank version of Form 4-SF-update, or return to the list of all IOTC statistical data reporting forms.

Data content

Number (or weight) of fish sample and raised estimates by size category and species, along with information on the value (%) and type of sampling coverage used for the estimations by month, year, fleet, fishery and geographical grid.

Stratification

General information

Element Requirement Description Input value
Reporting year M Gregorian calendar year of the fishing activities reported through the dataset Integer (e.g., 1996)
Reporting entity M Code of the entity reporting the dataset to the IOTC Secretariat Code from Entities
Flag state M Code of the country registration of the fishery vessels Code from Countries
Fisheries M Type of fishing practices based on several factors Code from Fisheries
Species M Species caught and discarded Code from Species

Main data elements

Element Requirement Description Input value
Month M Month of the fishing activities reported through the dataset Integer 1..12
Grid M 5° grid area Code from Grid codes
Sex O Sex of the fish sampled Code from Sex

Sample data

Element Requirement Description Input value
Size class (low) M The lowest size recorded for the sample Integer
Size class (high) M The highest size recorded for the sample Integer
Number of samples M Actual number of fish measured in the stratum Integer
Number of fish M Raised number of fish in the stratum Integer

Data specifications

Element Requirement Description Code list
Original data type M Preliminary/final status of the data Code from Type of data
Original data source M Source of information Code from Size frequency data sources
Original data processing M Processing applied to the data Code from Size frequency data processings
Data raising M Level of raising (i.e., extrapolation) Code from Raisings
Source coverage type O Variable used for data coverage Code from Types of coverage
Source coverage value O Value of coverage Percentage (%)
Type of fate M Fate of fish caught (retained or discarded) Code from Types of fate
Fate O Reason for retained or discarded of the catch Code from Fate

Measurements

Element Requirement Description Code list
Type of Measurement M Given measurement types (weight or length) Code from Types of measurement
Measured type M Type of measure recorded Code from Measurements
Measurement Tool M Tool used to take the measurement Code from Measurement tools
Size interval M Size interval between lowest and highest measurements of the sampled species Integer

Original data

Element Requirement Description Code list
Estimation M Indicates if the data was estimated or actual recorded data Code from Estimations

Reporting metadata

Element Requirement Description Format Example
Liaison officer full name M Name of the liaison officer in charge of the compilation of the data Plain text John Doe
Liaison officer email M Email address of the liaison officer in charge of the compilation of the data Valid email address
Organisation name M Name of the organisation in charge of the compilation of the data Plain text National Institute of Fisheries
Organisation email O Email address of the organisation in charge of the compilation of the data
Finalisation date M Date of finalisation of the dataset ISO 8601 1996-03-27
Submission date M Date of submission of the dataset ISO 8601 1997-03-21

Reporting deadlines

  • Longline fisheries: 30 June (preliminary), 30 December (final)
  • Surface fisheries: 30 June (final)
  • Coastal fisheries: 30 June (final)

Additional information

The spatial and temporal resolutions, and catch units

Category Temporal resolution Spatial resolution Catch unit
All fisheries Month 5° grid area or finer for the SC number of fish

Reference code lists

Entities

Countries

IOTC 5° grids

Fisheries

Types of measurement

Measurements

Measurement tools

Types of fate

Fates

Sexes

Species

Types of data

Data raising

Size-frequency data sources

Size-frequency data processings

Types of coverage types

Estimations