How concerned is the Fisheries Department about this trend?

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The Fisheries Department Expresses Significant Concern Over Foreign Fish Species Dominating Klang Valley Rivers

The Department of Fisheries of Malaysia (DoF) has conveyed significant concern regarding the monopolisation of six Klang Valley rivers by foreign fish species. This trend poses a substantial risk to the natural development of the rivers' ecosystem biodiversity, potentially leading to stagnation.
Six Rivers Under Foreign Species Dominance

Six specific rivers in the Klang Valley have been identified as being heavily populated by non-native fish species. These include Sungai Kuyoh, Sungai Klang, Sungai Keroh, Sungai Jinjang, Sungai Gombak, and Sungai Batu. The presence of species such as ikan bandaraya (Amazon sailfin catfish), black tilapia, and keli afrika (African catfish) is particularly noted.
Alarming Percentage of Foreign Species

Datuk Adnan Hussain, the director-general of the DoF, stated that the proportion of foreign fish species within these affected rivers is "very concerning." This phrasing indicates a high level of apprehension from the department regarding the ecological imbalance.
Impact on Ecosystem Biodiversity

The primary concern highlighted by the DoF is the potential for the stagnation of ecosystem biodiversity development in these rivers. The unchecked proliferation of foreign species can outcompete native fauna for resources, alter habitats, and disrupt the natural food web, thereby hindering the natural evolution and resilience of the riverine ecosystem.

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