Abstract
In 2019 we captured specimens of Oreochromismossambicus Peters, 1852 from Batu Batu River, an estuary river on Kangean Island (Indonesia), a conservation area in the Java Sea. These records are among the first of this species from an island in the Java Sea. A description of morphological characters of sampled specimens is provided.
Highlights
Oreochromis mossambicus Peters, 1852 is a tilapia native to coastal regions and the lower reaches of rivers in southern Africa, from the Bushman River in the Eastern Cape to Zambezi River delta (Bruton and Boltt 1975; Cooper and Harrison 1992)
Tilapias have generally spread in mainland Indonesia where aquaculture activities have been underway for some time (Basuki and Sri 2014)
The meristic characters are shared with Orechromis mortimeri, and both species are close to Oreochromis spilurus in numbers of vertebrae, dorsal rays and gill rakers
Summary
Oreochromis mossambicus Peters, 1852 is a tilapia native to coastal regions and the lower reaches of rivers in southern Africa, from the Bushman River in the Eastern Cape to Zambezi River delta (Bruton and Boltt 1975; Cooper and Harrison 1992). Oreochromis mossambicus exhibits tolerance to salinity (de Moor et al 1986; Russell et al 2012). Tilapias have generally spread in mainland Indonesia (brackish and freshwaters) where aquaculture activities have been underway for some time (Basuki and Sri 2014). One of islands in the Java Sea, is a conservation area and has no record of culturing tilapia.
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