Estimates of age frequency for black oreo from 2014 on southwest Chatham Rise (OEO 3A) / I.J. Doonan, P.J. McMillan, C. Ó Maolagáin.

By: Doonan, I. J [author.].
Contributor(s): McMillan, P. J. (Peter John), 1955- [author.] | Ó Maolagáin, C [author.] | New Zealand. Ministry for Primary Industries [issuing body.].
Material type: materialTypeLabelBookSeries: New Zealand fisheries assessment report: 2017/59.Publisher: Wellington : Ministry for Primary Industries, 2017.Description: 1 online resource : illustrations (some colour).ISBN: 9781776657032 (online).Subject(s): BLACK OREOS | CHATHAM RISE | STATISTICS | FISH POPULATIONS | AGE COMPOSITION | AGE DETERMINATION | OTOLITHSHoldings: ELECTRONIC Online resources: Fisheries Infosite | NIWA document server Summary: Otoliths (n=600) were sampled mainly from the 2014 acoustic survey mark identification tows in management area OEO 3A to provide age frequencies by area (Area 1 and Area 2&3). The current study confirmed the results found in a previous ageing study that used data from 1997 to 2006, i.e., age distributions were similar in Area 1 and Area 2&3, and mean length at age was lower in Area 1 relative to that in Area 2&3.
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"October 2017."

Includes bibliographical references.

Otoliths (n=600) were sampled mainly from the 2014 acoustic survey mark identification tows in management area OEO 3A to provide age frequencies by area (Area 1 and Area 2&3). The current study confirmed the results found in a previous ageing study that used data from 1997 to 2006, i.e., age distributions were similar in Area 1 and Area 2&3, and mean length at age was lower in Area 1 relative to that in Area 2&3.

ELECTRONIC

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