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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
O'Donnell, Ciaran
O’Malley, M.
Mullins, Eugene
Daly, Eoghan
Keogh, Niall
McBride, Lauren
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Date
2024
Publisher
Marine Institute
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Abstract
The primary objectives of this survey were: <br><br>
*Carry out a two phase survey cruise track covering the core survey area
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*Carry out additional adaptive surveys as required in areas of interest
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*Collect biological samples from directed trawling on insonified fish echotraces
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* Collect biological data on the age, length and maturity of herring and sprat
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*Determine an age stratified estimate of relative abundance of herring within the survey area (ICES Divisions VIIj, VIIg and VIIaS)
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*Determine an estimate of relative abundance of sprat, anchovy and sardine within the survey area (ICES Divisions VIIj, VIIg and VIIaS)
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*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)
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O'Donnell, C., O'Malley, M., Mullins, E., Daly, E., Keogh, N., & McBride, L. (2024). Celtic Sea Herring Acoustic Survey Cruise Report 2023, 09 - 29 October 2023. Feas Survey Series; 2023/04. Marine Institute