Age verification of boarfish (capros aper) in the northeast atlantic

The boarfish (Capros aper) is a pelagic species of recent interest to the fishing industry, with landings increasing by >500% over the past 3 years. The objective of the study was to provide a method for age determination based on whole sagittal otoliths, with the results to be used in stock asse...

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Bibliographic Details
Published in:ICES Journal of Marine Science
Main Authors: Hussy, K., Coad, J. O., Farrell, E. D., Clausen, L. A. W., Clarke, M. W.
Format: Article in Journal/Newspaper
Language:unknown
Published: Oxford University Press (OUP) 2011
Subjects:
age determination
boarfish
growth patterns
marginal increment analysis
otolith
long-term changes
annulus formation
growth
otoliths
snipefish
spp
validation
increments
abundance
maturity
Northeast Atlantic
Online Access:http://hdl.handle.net/10379/12020
https://doi.org/10.1093/icesjms/fsr168
Description
Summary:The boarfish (Capros aper) is a pelagic species of recent interest to the fishing industry, with landings increasing by >500% over the past 3 years. The objective of the study was to provide a method for age determination based on whole sagittal otoliths, with the results to be used in stock assessment. Translucent zones laid down at regular intervals are identified by marginal increment analysis as seasonally recurring. Translucent zones are formed between September/October and March/April, regardless of fish age. The occurrence of the first annulus is validated by analysis of presumed daily growth increments. Subsequent annulus deposition is homogenous between individuals and allows general guidelines to be derived for interpreting the age of boarfish using their otoliths.

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