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Multiple seafloor litter monitoring programmes are in place within Europe, during which the litter caught as bycatch in fishing nets from fish stock survey trawls are collected and recorded. This manual provides user-friendly instructions for ships’ crew and researchers collecting and recording seafloor litter. Essential information on how to categorize, count, weigh, and measure seafloor litter items is provided. Ambiguous names within litter categories are clarified and guidance is provided on specific issues such as the proper classification of items made up of multiple materials. A supplementary photo guide is provided to facilitate the litter identification and registration process, with clear pictures of example items from every litter subcategory. Finally, the reporting of marine litter data is described, including all required information to obtain a quality assured dataset. The use of this manual will help harmonize litter collection and reporting procedures, enhancing the quality of monitoring data. Adherence to the instructions is mandatory for survey trawls submitting data to the Database of Trawl Samples (DATRAS) and coordinated by the International Council for the Exploration of the Sea (ICES). The use of these instructions is optional for all other research and monitoring surveys.

ICES Manual for Seafloor Litter Data Collection and Reporting:

ICES Manual for Seafloor Litter Data Collection and Reporting from Demersal Trawl Samples (figshare.com)

With this intercalibration test, the ICES WGML aims to assess the degree of harmonization in litter registration. The test can be filled in by persons collecting and recording seafloor litter on board, persons performing the quality control and/or persons who submit seafloor litter data to DATRAS or DOME databases.

Link to the test:


Enter the code (Updated every 14 days):

3628 7912

Tags: litter data collection data Seafloor litter ICES test guidance DATRAS DOME


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