Tapah, Wallago leeri Bleeker is a commercial freshwater<br>fish in Riau waters, Indonesia. This species is<br>distributed in southeast Asia from Thailand to Indonesia<br>(Froese and Pauly 2017). Tapah is the main target<br>of local fishermen in Riau Province, Indonesia.<br>Intense fishing of this species over the last decade has<br>resulted in declining wild populations of W. leeri<br>(Utomo 2016). In addition, the tapah population is<br>also threatened by habitat degradation from deforestation<br>that is prompting increases in temperature and<br>turbidity and leading to lowered dissolved oxygen<br>concentrations. Studies on tapah are scarce; the previous<br>study on this species focuses only on<br>morphometric characteristics (Nathasya and Elvyra<br>2014), photoperiod, and feeding regimes (Giri et al.<br>2002).
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