NDLI: Comparison between surface-reading and cross-section methods using sagittal otolith for age determination of the marbled sole Pseudopleuronectes yokohamae

Content Provider	Springer Nature Link
Author	Lee, Jeong Hoon Kodama, Keita Kume, Gen Oyama, Masaaki Katayama, Satoshi Takao, Yuji Horiguchi, Toshihiro
Copyright Year	2009
Abstract	To find an appropriate method for age determination in the marbled sole Pseudopleuronectes yokohamae in Tokyo Bay, Japan, sagittal otoliths of 1,343 individuals were observed by surface-reading and cross-section methods and the results were compared. Opaque zones occurred once a year and were regarded as annuli in both methods. The surface-reading method sometimes provided a lower count of the number of annuli than the cross-section method, and the frequency of this discrepancy was highest in older fish (males above 5 years, females above 4 years). The oldest female fish was estimated to be age 10 years by the cross-section method but 8 years by the surface-reading method. The cross-section method could provide a more accurate estimate of age and is therefore likely to be indispensable to estimations of longevity. In contrast, the surface-reading method is superior in terms of cost and time efficiency but is likely to underestimate the ages of older fish. However, growth equations based on age estimated by the surface-reading method were sufficiently accurate if males ≥5 years and females ≥4 years were combined as specific, single age groups of 5+ and 4+, respectively.
Starting Page	379
Ending Page	385
Page Count	7
File Format	PDF
ISSN	09199268
Journal	Fisheries Science
Volume Number	75
Issue Number	2
e-ISSN	14442906
Language	English
Publisher	Springer Japan
Publisher Date	2009-02-20
Publisher Place	Japan
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Age determination Cross-section method Growth Otolith Pseudopleuronectes yokohamae Surface-reading method Tokyo Bay Food Science Freshwater & Marine Ecology Fish & Wildlife Biology & Management
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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