CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Marine & Freshwater Research   
Marine & Freshwater Research
Journal Banner
  Advances in the Aquatic Sciences
blank image Search
blank image blank image
blank image
  Advanced Search

Journal Home
About the Journal
Editorial Board
Online Early
Current Issue
Just Accepted
All Issues
Special Issues
Research Fronts
Sample Issue
For Authors
General Information
Instructions to Authors
Submit Article
Open Access
For Referees
General Information
Review an Article
Referee Guidelines
Annual Referee Index
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with us
blank image
facebook twitter youtube


Article << Previous     |     Next >>   Contents Vol 49(6)

Age determination of black bream, Acanthopagrus butcheri (Sparidae), from the Gippsland Lakes of south-eastern Australia indicates slow growth and episodic recruitment

Alexander K. Morison, Patrick C. Coutin and Simon G. Robertson

Marine and Freshwater Research 49(6) 491 - 498
Published: 1998


The age of black bream (Acanthopagrus butcheri) in the Gippsland Lakes of south-eastern Australia was estimated with high precision from sectioned otoliths of fish sampled from 1993 to 1996. Ageing techniques were validated by following the progression of age classes over 4 years. Correct identification of the first increment was aided by reference to the position of the subcupular meshwork fibre zone, and age assignment was confirmed by linear regression analyses of otolith weight against fish age. The growth of black bream was found to be slower, and their natural life span longer, than previously estimated from length–frequency distributions and scale readings. The maximum age recorded was 29 years, with most black bream 4–9 years old and few fish more than 10 years old. There were significant differences between the growth rates of males and females. The von Bertalanffy growth parameters were: L 54.5 cm FL, t0 –5.21 years, K 0.042 year-1 for females and L 38.2 cm FL, t0 –3.70 years, K 0.077 year-1 for males. The current age structure suggests that recruitment has been episodic since 1981 and low for three recent years in succession.

Keywords: otolith, validation.

Full text doi:10.1071/MF97237

© CSIRO 1998

blank image
Subscriber Login

PDF (743 KB) $25
 Export Citation
Legal & Privacy | Contact Us | Help


© CSIRO 1996-2014