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Age and growth of two newly established invasive populations of Tilapiamariae in northern Australia

Russell, D. J. and Thomson, F. E. and Thuesen, P. A. (2013) Age and growth of two newly established invasive populations of Tilapiamariae in northern Australia. Journal of Fish Biology, 82 (4). pp. 1211-1225. ISSN 1095-8649

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Article Link(s): http://dx.doi.org/10.1111/jfb.12059

Abstract

Sagittal otoliths were used to age the samples of Tilapia mariae collected from a coastal river and an impoundment. Validation of sagittae checks was achieved using both quantitative marginal increment analysis and by tetracycline marking of the otoliths of fish kept in tanks and in a farm dam. The annulus pattern on the otoliths was generally clear and their formation appeared to be temperature related and largely completed in the Austral spring around September and October. Male T. mariae grow faster and larger than females and the maximum ages of fish from the coastal river and impoundment was 9+ and 4+ years, respectively. Past fish surveys and the absence of older age classes in the impoundment population would suggest that this population was only very recently established.

Item Type:Article
Business groups:Animal Science
Keywords:age validation alien species black mangrove cichlid Cichlidae exotic fish tetracycline
Subjects:Aquaculture and Fisheries > Fisheries > Fishery research
Science > Invasive Species > Animals
Deposited On:24 Sep 2014 05:49
Last Modified:24 Sep 2014 05:49

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