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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...
The reproductive biology of two invasive tilapia species, Oreochromis mossambicus and Tilapia mariae, resident in freshwater habitats in north‐eastern Australia was investigated. Oreochromis mossambicus exhibited plasticity in some of its life‐history characteristics that enhanced its ability to occupy a range of habitats. These included a shallow, weed‐choked, freshwater coastal drain that was subject...
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