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Age determination protocols for jack mackerels (Trachurus spp.) in New Zealand waters / P.L. Horn, C. Ó Maolagáin.

By: Horn, P. L. (Peter L.) [author.].
Contributor(s): Ó Maolagáin, C [author.] | Fisheries New Zealand (Government agency) [issuing body.].
Material type: materialTypeLabelBookSeries: New Zealand fisheries assessment report: 2020/07Publisher: Wellington, New Zealand : Fisheries New Zealand, Tini a Tangaroa, 2020.Description: 1 online resource : colour illustrations.Content type: text Media type: computer Carrier type: online resourceISBN: 9781990017438 (online).Other title: Age determination of jack mackerels [Running title].Subject(s): MACKEREL | TRACHURUS NOVAEZELANDIAE | TRACHURUS DECLIVIS | TRACHURUS MURPHYI | JACK MACKEREL | MACKEREL FISHERIES | FISH POPULATIONS | AGE DETERMINATION | OTOLITHS | AGE COMPOSITION | FISH STOCK ASSESSMENT | NEW ZEALANDHoldings: ELECTRONIC Online resources: FAR 2020/07 NIWA document server Summary: This report documents the age determination protocols for a group of important New Zealand middle-depth finfish species: jack mackerels (Trachurus novaezelandiae, T. declivis, and T. murphyi). It describes the most recent scientific methodologies used for otolith preparation and interpretation, ageing procedures, and the changes in these methodologies over time. Digital image examples of otolith preparations are presented and fully illustrate the zone interpretation used in determining fish age for the three jack mackerel species. Associated difficulties and idiosyncrasies related to ageing prepared otoliths are also described.
List(s) this item appears in: New Zealand Fisheries Assessment Report
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PDF PDF WELLINGTON
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ELECTRONIC 1 Not for loan 396546

"April 2020."

Includes bibliographical references.

This report documents the age determination protocols for a group of important New Zealand middle-depth finfish species: jack mackerels (Trachurus novaezelandiae, T. declivis, and T. murphyi). It describes the most recent scientific methodologies used for otolith preparation and interpretation, ageing procedures, and the changes in these methodologies over time. Digital image examples of otolith preparations are presented and fully illustrate the zone interpretation used in determining fish age for the three jack mackerel species. Associated difficulties and idiosyncrasies related to ageing prepared otoliths are also described.

ELECTRONIC

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