The “Tilapia Law” encouraging non-native fish threatens Amazonian River basins
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Freshwater ecosystems in Brazil, arguably the most diverse on the planet, have been disturbed by several threats in the past years, particularly competition for water and subsequent water abstraction, urbanization, severe drought, dam construction/water diversion, pollution from different sources, commercial exploitation, and the introduction of non-native species (Agostinho et al. 2005; Vitule et al. 2015; Lima et al. 2015; Winemiller et al. 2016). A worrying example is the federal law 5989/2009 that intends to naturalize non-native fish species by decree in Brazil, some of which have a high invasion potential, such as the carps Aristichthys nobilis, Ctenopharyngodon idella, Cyprinus carpio, Hypophthalmichthys molitrix and tilapias Oreochromis spp. (Lima et al. 2012; Vitule et al. 2012; Pelicice et al. 2014). After naturalized, such species could be used without legal restrictions in aquaculture, for instance. Although aquaculture has been raising non-native species in the Amazon for...
KeywordsNile Tilapia Native Fish Propagule Pressure Environmental Catastrophe Biotic Homogenization
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