VALIDATION OF AGE AND GROWTH USING MICROCONSTITUENT ANALYSIS OF FISH HARDPARTS

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dc.contributor.advisorSecor, David Hen_US
dc.contributor.authorFrey, Benjamin Alexanderen_US
dc.contributor.departmentMarine-Estuarine-Environmental Sciencesen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2022-06-15T05:49:02Z
dc.date.available2022-06-15T05:49:02Z
dc.date.issued2022en_US
dc.description.abstractWithout accurate age interpretation or validation, serious errors in the management and understanding of fish populations can occur. This study employs a novel approach to age validation using trace element microconstituent analysis of hardparts. The optical zones of annuli are hypothesized to be the result of seasonal changes in organic content and experienced temperature, either of which can result in cycles of trace elements associated with annulus formation. Using Laser Ablation ICP-MS analysis, we tested for periodicity in hardpart Ca, Cu, P, Sr, Mg, Mn, Zn, and Ba in comparison to the periodicity of annulus zonation (opaque and translucent zones). Initial tests were conducted for black sea bass, a species for which yearly annulus formation has been validated. Periodicities in elemental profiles in otoliths were identified using a Lomb-Scargle periodogram analysis that confirmed that cycles in Mg corresponded to annulus formation in the model species. This same approach was applied to Atlantic monkfish, a species without a valid ageing procedure. Annular chemical oscillations occurred in illicia hardparts that exhibited modest agreement (80.7%) with known-age samples.en_US
dc.identifierhttps://doi.org/10.13016/lfjf-4yzs
dc.identifier.urihttp://hdl.handle.net/1903/28815
dc.language.isoenen_US
dc.subject.pqcontrolledEcologyen_US
dc.subject.pqcontrolledBiochemistryen_US
dc.subject.pquncontrolledAge Determinationen_US
dc.subject.pquncontrolledAge Validationen_US
dc.subject.pquncontrolledMicrochemistryen_US
dc.subject.pquncontrolledMonkfishen_US
dc.subject.pquncontrolledOtolithen_US
dc.subject.pquncontrolledStock Assessmenten_US
dc.titleVALIDATION OF AGE AND GROWTH USING MICROCONSTITUENT ANALYSIS OF FISH HARDPARTSen_US
dc.typeThesisen_US

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