Age validation from tagged school and gummy sharks injected with oxytetracycline

Funding Activity

Website
https://www.frdc.com.au/project/1997-110

Funding Status
Closed

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Funded Activity Summary

Length-at-age data are an important input to the fully age-structured fishery assessment models used by SharkFAG for stock advice to SharkMAC.

School sharks and gummy sharks are currently aged by counting growth-increment bands on the articular faces of vertebrae stained with alizarin red. This method is only partly validated on captive sharks and requires further work. There is a need to validate the assumption that the bands of alizarin red stain are annual and that they provide reliable estimates of age. Appropriate methods for undertaking this validation were developed as part of the completed 'Southern Shark Age Validation Project' (FRDC 91/037). The recently completed 'Southern Shark Tagging project' (FRDC 93/066) was ideally timed to provide sufficient samples to properly undertake this validation.

Objectives:
1. Further refine age validation of sharks by laboratory processing of vertebrae from recaptured school and gummy sharks tagged and injected with oxytetracycline as part of the recently completed FRDC funded tagging and nursery projects.

Funded Activity Details

Start Date: 27-06-1997

End Date: 03-05-2002

Funding Scheme: Funding Scheme not available

Funding Amount: $85,272.00

Funder: Fisheries Research and Development Corporation

Research Topics

ANZSRC Field of Research (FoR)

There are no FoR codes available for this funding activity

ANZSRC Socio-Economic Objective (SEO)

There are no SEO codes available for this funding activity

Other Keywords

Ageing | Biology | Biomass | Chemistry | Imagery | Tagging

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