The distribution of the European sea bass, Dicentrarchus labrax, in Irish waters

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dc.contributor.advisorCulloty, Sarah C.en
dc.contributor.advisorMcginnity, Philipen
dc.contributor.advisorO'Maoiléidigh, Niallen
dc.contributor.authorO'Neill, Ross
dc.contributor.funderMarine Instituteen
dc.date.accessioned2017-12-07T09:36:09Z
dc.date.available2017-12-07T09:36:09Z
dc.date.issued2017
dc.date.submitted2017
dc.description.abstractIn Irish waters comparatively little is known about the life history of the European sea bass (Dicentrarchus labrax) compared to other fish species. Based on long term extensive offshore surveys, the geographical location of sea bass catches and similarities of their life history trajectories in other regions suggest those found in offshore Irish waters may be a prespawning feeding aggregation which is part of a larger aggregation extending from the south coast of Ireland to the Bristol Channel. Particle tracking model results show that it may be possible that the dispersal of sea bass larvae from putative spawning areas in inshore and offshore waters may influence recruitment at regional, national and international scales. Acoustic tracking of sea bass in inshore waters found some evidence of inshore movement between localities while also providing evidence of site fidelity. The residency of up to one third of tagged fish during the assumed spawning season in inshore waters suggested potential inshore spawning or skipped spawning. The long absence periods for two thirds of tagged fish during this same period may suggest substantial offshore migration. The findings using pop-off satellite archival tags suggest that at least some sea bass that originate in both Irish and British coastal waters may aggregate in the same approximate location in the Celtic Sea during the assumed peak spawning period. Genetic analysis supports the contention that sea bass from inshore Irish waters, from offshore waters in the Celtic Sea and from the North Sea may be part of the same panmictic population. The evidence presented here points to sea bass occurring in Irish waters as being part of the larger trans-Celtic Sea population. Therefore, the sustainable management and conservation of the species occurring in Irish waters must be undertaken on a basis which is international, as well as local.en
dc.description.sponsorshipMarine Institute Beaufort Marine Research Award in Fish Population Genetics (Grant-Aid Agreement No. BEAU/GENE/02)en
dc.description.statusNot peer revieweden
dc.description.versionAccepted Version
dc.format.mimetypeapplication/pdfen
dc.identifier.citationO'Neill, R. 2017. The distribution of the European sea bass, Dicentrarchus labrax, in Irish waters. PhD Thesis, University College Cork.en
dc.identifier.endpage268en
dc.identifier.urihttps://hdl.handle.net/10468/5127
dc.language.isoenen
dc.publisherUniversity College Corken
dc.rights© 2017, Ross O'Neill.en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/en
dc.subjectSea bassen
dc.subjectIrelanden
dc.subjectMarine Instituteen
dc.subjectUniversity College Corken
dc.subjectDicentrarchus labraxen
dc.subjectEuropean sea bassen
dc.subjectTelemetryen
dc.subjectParticle trackingen
dc.subjectModelen
dc.subjectSatellite telemetryen
dc.subjectAcousticen
dc.subjectFisheries researchen
dc.thesis.opt-outfalse
dc.titleThe distribution of the European sea bass, Dicentrarchus labrax, in Irish watersen
dc.typeDoctoral thesisen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD (Science)en
ucc.workflow.supervisors.culloty@ucc.ie
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