Survey & Cruise Reports
http://hdl.handle.net/10793/52
2024-03-22T07:42:07ZCeltic Sea Herring Acoustic Survey Cruise Report 2023, 09 - 29 October, 2023
http://hdl.handle.net/10793/1895
Celtic Sea Herring Acoustic Survey Cruise Report 2023, 09 - 29 October, 2023
O'Donnell, Ciaran; O’Malley, M.; Mullins, Eugene; Daly, Eoghan; Keogh, Niall; McBride, Lauren
The primary objectives of this survey were: <br><br>
*Carry out a two phase survey cruise track covering the core survey area
<br><br>
*Carry out additional adaptive surveys as required in areas of interest
<br><br>
*Collect biological samples from directed trawling on insonified fish echotraces
<br><br>
* Collect biological data on the age, length and maturity of herring and sprat
<br><br>
*Determine an age stratified estimate of relative abundance of herring within the survey area (ICES Divisions VIIj, VIIg and VIIaS)
<br><br>
*Determine an estimate of relative abundance of sprat, anchovy and sardine within the survey area (ICES Divisions VIIj, VIIg and VIIaS)
<br><br>
*Collect physical oceanography data from vertical profiles from a deployed sensor array
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* Collect biological samples of sprat and herring for genetic analysis on stock origin studies.
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* Visual surveys to determine the distribution and abundance of apex predators (marine mammals, tuna and seabirds)
2024-01-01T00:00:00ZWinter Environmental Survey 2023 (Dun Laoghaire – Galway): Winter nutrients, carbonate chemistry parameters, benthic macro-invertebrates, microplastics and contaminants monitoring (TC23001)
http://hdl.handle.net/10793/1893
Winter Environmental Survey 2023 (Dun Laoghaire – Galway): Winter nutrients, carbonate chemistry parameters, benthic macro-invertebrates, microplastics and contaminants monitoring (TC23001)
O'Beirn, Francis; O'Donnell, Garvan
2023-01-01T00:00:00ZFU19 Nephrops Grounds 2023 UWTV Survey Report and catch scenarios for 2024
http://hdl.handle.net/10793/1879
FU19 Nephrops Grounds 2023 UWTV Survey Report and catch scenarios for 2024
Doyle, Jennifer; Aristegui, M.; Ryan, Gráinne; Bentley, K.; Sullivan, Mairead; Opanowski, Artur; Sugrue, S.; Farrell, Ellen; Domingos, Marta; McCorriston, P.; Hehir, Imelda; Ni Chonchuir, G.; Fahy, James; Manning, Laurence; McCann, Neve; O’Connor, Sean; Woodcock, Kirsty; Course, Grant; Meireles de Castro, Rita; Joyce, Haleigh; Moloney, Sarah; Dower, Ciara; White, Jonathan
This report provides the main results of the fourteenth 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 2023 a total 42
UWTV stations were successfully completed. The mean density estimates varied
considerably across the different patches. The 2023 raised abundance estimate
showed a 15% decrease from the 2022 estimate and at 220 million burrows is below
the MSY Btrigger reference point (430 million). Using the 2023 estimate of abundance
and updated stock data implies catch in 2024 that correspond to the F ranges in the
EU multi annual plan for Western Waters are between 224 and 248 tonnes
(assuming that discard rates and fishery selection patterns do not change from the
average of 2020–2022). One species of sea pen was observed; Virgularia mirabilis
which has been observed on previous surveys of FU19. Trawl marks were observed
at 10% of the stations surveyed.
2023-01-01T00:00:00ZThe “Smalls” Nephrops Grounds (FU22) 2023 UWTV Survey Report and catch scenarios for 2024
http://hdl.handle.net/10793/1878
The “Smalls” Nephrops Grounds (FU22) 2023 UWTV Survey Report and catch scenarios for 2024
Doyle, Jennifer; Bentley, K.; Sullivan, Mairead; Opanowski, Artur; Sugrue, S.; Farrell, Ellen; Domingos, Marta; Hehir, Imelda; Ryan, Gráinne; McCorriston, P.
This report provides the main results and findings of the eighteenth annual underwater
television survey on the ‘Smalls grounds’ ICES assessment area; Functional Unit 22. The
survey was multi-disciplinary in nature collecting UWTV and other ecosystem data. A total
of 41 UWTV stations were surveyed successfully (high quality image data), carried out over
an isometric grid at 4.5nmi or 8.3km intervals. The precision, with a CV of < 7%, was well
below the upper limit of 20% recommended by SGNEPS (ICES, 2012). The 2023 abundance
estimate was 13% lower than in 2022 and at 776 million is below the MSY Btrigger reference
point (990 million). Using the 2023 estimate of abundance and updated stock data implies
catch in 2024 that correspond to the ICES MSY approach of 1912 tonnes, assuming that
discard rates and fishery selection patterns do not change from the average of 2020 - 2022.
One species of sea pen was recorded as present at the stations surveyed: Virgularia
mirabilis. Trawl marks were observed at 37% of the stations surveyed.
2023-01-01T00:00:00Z