Thesis Title:
Tracing the global spread of Prussian Carp (Carassius gibelio) and assessing ecological consequences
Research Description:
The proliferation of non-native species in ecosystems worldwide presents a complex challenge to biodiversity conservation and ecosystem management (Schlaepfer& Olden, 2011; Schelhas et al., 2021; Haubrock et al., 2021). Among these invaders, the Prussian carp (Carassius gibelio) stands out as a highly successful and widely distributed species worldwide, eliciting growing concern among ecologists, conservationists, and fisheries managers alike (Hamilton,2021; Docherty, 2016). Freshwater ecosystems are one of the most endangered ecosystems globally (Leidy & Moyle, 1998; Ricciardi & Rasmussen, 1999; Dudgeon et al., 2006). Prussian carp has significantly expanded its presence in freshwater ecosystems across Europe and the Middle East since the 1600s, initially through accidental aquaculture escapees and subsequent secondary spread via natural dispersal, aquaculture escapes, and intentional introductions by anglers (Kottelat and Freyhof, 2007; Kalous et al., 2012; Witkowski, 1996; Elgin et al., 2014). It exhibits a widespread distribution beyond its native range, with established populations documented across various continents (Elgin et al., 2014). This global spread of the Prussian carp has raised significant ecological concerns, as the species has demonstrated remarkable adaptability to diverse environmental conditions and ecosystems, often out-competing native species and disrupting fragile aquatic ecosystems (Docherty et al., 2016). Moreover, its ability to thrive in a wide range of habitats further exacerbates its invasive potential, posing significant challenges to biodiversity conservation and ecosystem management efforts worldwide (Docherty et al., 2016;2017). The impact of Prussian Carp on native communities primarily involves food competition in natural waters (Halacka et al., 2003). The ecological impacts of introduced Prussian carp are profound, with documented consequences for native fisheries and ecosystem functioning, attributed to its unique gynogenetic reproductive strategy and adaptable nature (Perdikaris, 2012; Tarkan et al., 2012; Paulovits, 1998; Elgin et al., 2014). Understanding the mechanisms driving the global expansion of Prussian carp populations and assessing their ecological consequences are paramount for effective management and conservation strategies (Schmidt & Poesch, 2021).
