Otoliths of Southern Bluefin Tuna (Thunnus maccoyii) taken from waters off New South Wales, South Australia, and Western Australia, of between 42 cm and 167 cm F.L. were prepared to reveal annual banding. Methods of preparation and examination are detailed. Otolith growth was demonstrated to be...

Determining the age of sharks is difficult. A reliable independent method of validating age estimates is needed, apart from relying on tag return data. The success of radiometric analysis for bony fish overseas and in Australia suggested that it would be worth trying the method on sharks. Four...