Analysis of self-reported discard information in Uruguayan industrial trawl fisheries
DOI:
https://doi.org/10.1590/Keywords:
Fishing log, Eco-systemic approach, Best practices, Hairy conger, Brazilian menhadenAbstract
Discarding unwanted catches is a significant issue arising from marine fishing activities, with far-reaching
socioeconomic and ecological consequences. Uruguayan fishery regulations fail to penalize discarding but
mandate self-reporting, providing an opportunity to analyze the discard from the two Uruguayan industrial bottom
trawl fleets (shelf and coastal). By examining fishing logs, discard was estimated at 3,268 tons/year, accounting
for 6.5% of the total catch (9.1% for the shelf fleet and 3.7% for the coastal fleet), with no discernible temporal
trends for 2016, 2017, 2019, and 2020 nor significant seasonal variations in discard magnitude. Diversity, species
richness, and evenness of the discard varied between fishing seasons and years. The most discarded species
were Bassanago albescens in the shelf fleet and Brevoortia aurea in the coastal fleet. Both species showed
magnitudes indicating a potential for exploitation development. Discard per unit of effort was mapped by fleet,
enhancing the potential for discard information reconstruction for the area and thereby facilitating its inclusion in
ecological and economic assessments. Discard reports have proven to be a valuable source of information that
should be integrated into fisheries conservation and management initiatives.
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