Description

This form supports the reporting of estimates of discards in numbers or live weight equivalent for the IOTC species, mobulid rays, whale sharks, cetaceans, common sharks, and other bycatch species. Reporting of quarterly estimates is voluntary and recommended to assess the seasonality of the discards. For each stratum, the data coverage – i.e., the percentage (%) of amount of fish sampled – derived from the coverage type must be reported to assess the representativeness and quality of the estimates.

Click here to download a blank version of Form 1-DI, or return to the list of all IOTC statistical data reporting forms.

Data content

Total number or live weight of discarded catches by species, along with information on the value (%) and type of sampling coverage used for the estimations by quarter if available, year, fleet, fishery, discard reason, and IOTC main area.

Stratification

General information

Element Requirement Description Input value
Reporting year M Gregorian calendar year of the fishing activities reported through the dataset Integer
Reporting country M Entity reporting the dataset to the IOTC Secretariat Code from Fleet
Flag country M Country registration of the fishing vessels Code from Fleet

Main data elements

Element Requirement Description Input value
Quarter O Fishing time period 0: Jan-Dec; 1: Jan-Mar; 2: Apr-Jun; 3: Jul-Sep; 4: Oct-Dec
Fishery M IOTC-defined fisheries Code from Fisheries
Area M Main IOTC areas Code from IOTC main areas
Target Species M Main species targeted Code from Species
Reasons for discarding M Reasons why the species were discarded Code from Reasons for discarding
Species M Species caught and discarded Code from Species
Condition of species M Conditions of species being discarded at sea Code from Conditions
Data raising M Level of raising (i.e., extrapolation) Code from Raisings
Catch unit M Units used to report the level of catches of a given species Code from Catch units

Original data

Element Requirement Description Input value
Original data type M Preliminary/final status of the data Code from Type of data
Original data source M Source of information Code from Retained catches data sources
Original data processing M Processing applied to the data Code from Retained catches data processings
Source coverage type M Variable used for data coverage Code from Coverage types

Reporting metadata

Element Requirement Description Format Example
Contact name M Name of the focal point in charge of the reporting of the data to the IOTC Secretariat Plain text John Doe
Contact e-mail address M Email address of the focal point in charge of the reporting of the data to the IOTC Secretariat Valid email address
Contact phone O phone number of the organisation of the focal point in charge of the reporting of the data to the IOTC Secretariat Valid phone number country code - number
Organisation name M Name of the organisation in charge of the reporting of the data to the IOTC Secretariat Plain text National Institute of Fisheries
Organisation email O Email address of the organisation in charge of the reporting of the data to the IOTC Secretariat Valid email address

Reporting deadlines

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

Reference codelists

Fleet

Reference codes modelling the flag / reporting country submitting the dataset to the IOTC Secretariat.

IOTC main areas

Reference codes modelling the two main areas in which the IOTC area of competence is split (western / eastern IOTC area, roughly coinciding with FAO areas F51 and F57).

Fisheries

Species

Reference codes modelling the species interacting with the fisheries as:

  • target species (retained or discarded)
  • bycatch species (retained or discarded)
  • sampled individuals
  • etc.

These codelists are subsets of the entries in the ASFIS list of species for fishery statistics purposes, from which they inherit the alphabetic codes, English, French and scientific names, as well as the family and order, and add the species category (in the IOTC sense), the IUCN status (retrieved from the IUCN red list of endangered species) and other characteristics of each entry such as their status of single species / species aggregate, bait species, SSI species, IOTC species.

Discard reasons

Reference codes modelling the discard reasons information used to obtain the data provided through a specific form.

Discard conditions

Reference codes modelling the conditions (at capture / at release) of individual aquatic creatures being discarded at sea or measured.

Data types

Reference codes modelling the type of statistics provided through a specific form, and in particular if these are:

  1. Preliminary when the statistics were estimated by using some information from the fishery and year concerned, and the data reported are likely to change in the future as more information become available; or

  2. Final when the statistics were estimated by using the complete set of data from the fishery and year concerned, and the data reported are unlikely to change in the future.

Retained catches data sources

Reference codes modelling the source of the retained catch data.

Retained catches data processings

Reference codes modelling the processing applied to the retained catch data.

Coverage types

Reference codes modelling the type of coverage for the raw information used to obtain the retained catch data.