Age estimates for black oreo and smooth oreo

Contributor(s): Doonan, I.J. (NIWA. Wellington) | McMillan, P.J. (NIWA. Wellington) | Kalish, J.M. (NIWA. Wellington) | Hart, A.C. (NIWA. Wellington) | NIWA Wellington (N.Z.).
Material type: materialTypeLabelBookSeries: New Zealand fisheries assessment research document ; 95/14.Publisher: Wellington, NZ : NIWA, 1995Description: 26 p.Subject(s): SMOOTH OREOS | BLACK OREOS | GROWTH | AGE DETERMINATION | OTOLITHSOnline resources: Click here to access online
Incomplete contents:
Smooth oreo (Pseudocyttus maculatus) and black oreo (Allocyttus niger) appear to be slow growing species, like orange roughy. Unvalidated age estimates were made by counting zones (assumed to be annual) in otolith thin sections. Maximum otolith zone counts were 86 for smooth oreo (51.3 cm total length (TL) fish) and 153 for black oreo (45.5 cm TL fish). Smooth oreo age estimates were similar to those reported for Australian fish by Smith & Stewart (1994). However, our black oreo age estimates were higher than those made for Australian black oreo by Smith & Stewart (1994) and this discrepancy needs to be resolved. Estimated age at maturity was 30 years for female smooth oreo and 42 years for female black oreo. (auths.)
In: New Zealand fisheries assessment research document
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Holdings
Item type Current library Call number Copy number Status Date due Barcode
JOURNAL JOURNAL WELLINGTON
JOURNALS
NO. 95/14 1 Available J09938

18 refs; 6 tables; 23 figs

"Not to be cited without permission of the authors".

Smooth oreo (Pseudocyttus maculatus) and black oreo (Allocyttus niger) appear to be slow growing species, like orange roughy. Unvalidated age estimates were made by counting zones (assumed to be annual) in otolith thin sections. Maximum otolith zone counts were 86 for smooth oreo (51.3 cm total length (TL) fish) and 153 for black oreo (45.5 cm TL fish). Smooth oreo age estimates were similar to those reported for Australian fish by Smith & Stewart (1994). However, our black oreo age estimates were higher than those made for Australian black oreo by Smith & Stewart (1994) and this discrepancy needs to be resolved. Estimated age at maturity was 30 years for female smooth oreo and 42 years for female black oreo. (auths.)

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