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dc.contributor.authorBurke, N.
dc.contributor.authorBrophy, D.
dc.contributor.authorSchon, P.-J.
dc.contributor.authorKing, P. A.
dc.date.accessioned2018-09-20T16:02:05Z
dc.date.available2018-09-20T16:02:05Z
dc.date.issued2009-05-22
dc.identifier.citationBurke, N. Brophy, D.; Schon, P.-J.; King, P. A. (2009). Temporal trends in stock origin and abundance of juvenile herring (clupea harengus) in the irish sea. ICES Journal of Marine Science 66 (8), 1749-1753
dc.identifier.issn1054-3139,1095-9289
dc.identifier.urihttp://hdl.handle.net/10379/10605
dc.description.abstractCeltic Sea herring (Clupea harengus) larvae partly disperse into the Irish Sea, where they mix with the resident stock during their first year of life. This affects the reliability of the use of acoustic estimates of juvenile abundance on the Irish Sea nursery grounds as a recruitment index for use in stock predictions. Otolith microstructure analysis can be used to distinguish between autumn-spawned and winter-spawned individuals. Because winter spawners do not occur in the Irish Sea, this component can be assigned to Celtic Sea immigrants. We used this method to estimate the proportion of winter-spawned individuals in samples of age-1 herring from the western Irish Sea over a 10-year period (1993-2003), and subtracted a corresponding proportion from the acoustic age-1 abundance estimates. The adjusted index for autumn-spawned (supposedly Irish Sea) juveniles was significantly correlated with the abundance of age-3 fish from the same year class in commercial catches and in the acoustic surveys (p < 0.05 and <0.01, respectively), whereas the correlations for unadjusted indices were not significant. These findings are discussed in relation to the monitoring and assessment of herring in the two areas.
dc.publisherOxford University Press (OUP)
dc.relation.ispartofICES Journal of Marine Science
dc.subjectherring (clupea harengus)
dc.subjectotolith microstructure
dc.subjectrecruitment indices
dc.subjectstock assessment
dc.subjectotolith microstructure
dc.subjectnorth-sea
dc.subjectfish
dc.subjectgrowth
dc.subjectpopulations
dc.subjectlarval
dc.titleTemporal trends in stock origin and abundance of juvenile herring (clupea harengus) in the irish sea
dc.typeArticle
dc.identifier.doi10.1093/icesjms/fsp140
dc.local.publishedsourcehttps://academic.oup.com/icesjms/article-pdf/66/8/1749/1965885/fsp140.pdf
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