Threatened fishes of the world: Pseudoplatystoma corruscans (Agassiz, 1829) (Siluriformes: Pimelodidae)

Uso de recursos alimentares por peixes imaturos e adultos de espécies piscívoras em uma planície de inundação neotropical

“…O consumo de outras presas associadas ao fundo, como representantes de Cichlidae, Erythrinidae, Gymnotidae e Siluriformes, corrobora essa suposição. Relatos sobre a alimentação natural do pintado são raros na literatura, apenas Mello et al (2009) comenta a presença de Loricariidae, Cichlidae e crutáceos nos estômagos da espécie, sendo estas, presas de fundo. Assim como a traíra, P. corruscans apresentou canibalismo, também evidenciado por Beux & Zaniboni Filho (2007).…”

Detection of hybrids and genetic introgression in wild stocks of two catfish species (Siluriformes: Pimelodidae): The impact of hatcheries in Brazil

“…Wild populations of P. corruscans have been negatively affected by overfishing and dam installations that hinder their migration and reproduction (Mello et al, 2009), causing this species to become critically endangered in Sao Paulo State (São Paulo, 2008). Thus, genetic contamination of natural populations presents an additional and high impact risk, mainly in localities with elevated frequencies of hybrids (i.e., the Aquidauana and Mogi-Guaç u Rivers).…”

“…In some rivers of the Paraguay-Parana River Basin, both species can occur in sympatry (Buitrago-Suárez and Burr, 2007;Langeani et al, 2007). Although several ecological disturbances have constantly affected the wild populations in various localities, especially in the Parana River Basin (Mello et al, 2009), and despite the fact that F1 hybrids have extensively been farmed, posing significant risks to the natural environment, there is a lack of detailed biological studies on hybridisation events involving these species and assessment of artificial hybrid stocks and their impact on wild stocks.…”

Experimental assessment of the effects of a Neotropical nocturnal piscivore on juvenile native and invasive fishes

“…Our results also suggest that different native piscivorous species (such as B. orbignyanus and P. corruscans) play complementary ecological roles, so preserving the diversity of the piscivore guild might help preventing invasions, especially of species, such as C. piquiti and O. niloticus, that could benefit from habitat homogenization or decreases in structural complexity. Native populations of P. corruscans are increasingly threatened by multiple anthropogenic and environmental disturbances, but mainly because of river impoundment that restrict much of the juvenile access to marginal lagoons of floodplain systems, a critical nursery ground not only for this species but also for most migratory fishes of South America (Agostinho et al, 2003;Mello et al, 2009;Barletta et al, 2010). If efforts to recovery P. corruscans populations were undertaken, especially those actions that enhance juvenile access to marginal lagoons, such as flooding pulse restoration and/or scientific hatchery and stocking programs, they would be an interesting chance to evaluate whether the rehabilitation of native piscivores help controlling fish invasions in the Paraná River and other similar riverine systems in the Neotropics.…”