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 data for multiple fisheries and species simultaneously.

Click here to download a blank version of Form 4-SF, or return to the list of all IOTC statistical data reporting forms. Click here to download a blank version of Form 4-SF-update which has been designed to report updated data for a single fishery and species.

Data content

Numbers of fish sampled and raised 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
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 fishing vessels Code from Countries

Main data elements

Element Requirement Description Input value
Month M Month of the fishing activities reported through the dataset Integer 1..12
Fishery M Type of fishing practices based on several factors Code from Fisheries
Grid M 5° grid area Code from Grid codes
Species M Species sampled Code from Species
Sex O Sex of the fish sampled Code from Sex
Type of fate M Fate of fish caught Code from Types of fate
Fate O Reason for retention or discarding of the fish Code from Fate

Original data

Element Requirement Description Input value
Estimation M Indicates whether the data were estimated Code from Estimations
Original data type M Preliminary/final status of the data Code from Types 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 (%)

Measurements

Element Requirement Description Input value
Type of Measurement M General type of size measurement Code from Types of measurement
Measurement M Nature of the size measurement Code from Measurements
Measurement tool O Tool used to take the measurement Code from Measurement tools

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 Numeric

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)

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

Estimations