Non-Entangling & Biodegradable FADs Guide

ISSF’s Non-Entangling & Biodegradable FADs guide for tuna fishers, Regional Fisheries Management Organizations (RFMOs), governments, and vessel owners shows research-based best practices in Fish Aggregating Device (FAD) design — both to avoid bycatch and reduce marine pollution.

Four tuna RFMOs already require fleets in their regions that fish with FADs to use only non-entangling designs. Some RFMOs additionally encourage fleets to build those FADs with biodegradable materials. The guide, first published in 2012 and revised in 2019 to include the biodegradable recommendation, is available in several languages.

ISSF 2015-02: Preliminary Study of the Relative Fishery Impacts on Non-Tuna Species Caught in Tuna Fisheries

Date Added: August 9, 2016
Downloaded: 325 times
Tags: Bycatch, Restrepo, Tuna
Authors: Justel-Rubio, Restrepo
Language: English
Author(s): Ana Justel-Rubio, Victor Restrepo
Report Type: Technical Report


All fishing methods have some type of unintentional environmental impact. One impact that receives a lot of attention is the incidental catch of non-target species, often referred to as “bycatch”. The purpose of this study is to provide descriptions of stock status (if available) and the relative impacts of different fisheries (if known), on non-tuna species caught incidentally in tuna fisheries (with an emphasis on those species that are caught by purse seine fisheries).

The information used was obtained primarily from the available tuna Regional Fishery Management Organization’s (tRFMO) scientific papers and scientific committee reports. In most cases, the available catch data for bycatch species is very sparse. Only in a few cases stock assessments have been conducted or attempted, resulting in a thorough compilation of catch data for different gears. This study thus helps to identify data gaps and research required to better characterize tuna fishery impacts on non-tuna species.

As the information available on these species is very sparse, this study should be viewed as an initial attempt to compile all available information so as to better understand overall fishery impacts on non-tuna species. The authors would be grateful to readers of this report who identify any errors or omissions so that they can be addressed in a subsequent update.