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FU19 Nephrops Grounds 2025 UWTV Survey Report and catch scenarios for 2026
Aristegui Ezquibela, Mikel Doyle, Jennifer Ryan, Gráinne Rupnik, Aga Fahy, James Blaszkowski, Marcin O’Connor, Sean Linehan, Eva Silvar, Paula McCorriston, Peter
Aristegui Ezquibela, Mikel
Doyle, Jennifer
Ryan, Gráinne
Rupnik, Aga
Fahy, James
Blaszkowski, Marcin
O’Connor, Sean
Linehan, Eva
Silvar, Paula
McCorriston, Peter
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Date
2025
Publisher
Marine Institute
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Abstract
This report provides the main results of the sixteenth underwater television survey of
the various Nephrops patches in Functional Unit 19. The survey was multi-disciplinary
in nature collecting UWTV and other ecosystem data. In 2025 a total of 42 UWTV
stations were successfully completed. The mean density estimates varied considerably
across the different patches. The 2025 raised abundance estimate showed an 11%
decrease from the 2024 estimate and at 260 million burrows is below the MSY Btrigger
reference point (430 million). Using the 2025 estimate of abundance and updated
stock data implies catch in 2026 that correspond to the F ranges in the EU multi annual
plan for Western Waters are between 317 and 357 tonnes (assuming that discard rates
and fishery selection patterns do not change from the average of 2022–2024). Two
species of sea pen were observed; Virgularia mirabilis and Pennatula phosphorea
which have been observed on previous surveys of FU19. Trawl marks were observed
at 7% of the stations surveyed.
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Aristegui, M., Doyle, J., Ryan, G., Rupnik, A., Fahy, J., Blaszkowski, M., O’Connor, S., Linehan, E., Silvar, P., McCorriston, P., Tortora, S., Hogan., N., and Joyce, H. (2025). FU19 Nephrops Grounds 2025 UWTV Survey Report and catch scenarios for 2026. Marine Institute UWTV Survey report