Heterotilapia buttikoferi (Hubrecht, 1881) (Perciformes: Cichlidae), an introduced exotic fish in the upper Paraná river basin

Abstract

Aquatic biodiversity loss can be attributed in part by the presence of invasive species that increase the risk of extinction of native species through competition, predation, transmission of parasites and disease, hybridization and introgression. This study reports the first record of Heterotilapia buttikoferi in the upper Paraná River basin, Brazil. Additionally, the effects of establishment of this invasive species and the lack of an effective political and environmental management in Brazil that hinder exotic species' eradication are herein discussed.

Clarias batrachus linnaeus, 1758 (siluriformes, clariidae): new records of threatened catfish from Bawean Island, Indonesia

“…The discovery of C. batrachus on Bawean Island could be caused by the Bawean (north coast of Java) was being connected to East Sunda River at last glacial era then being cut off and isolated due to rising sea levels 13,14 . Besides geological factors, the spread of freshwater fishes outside the mainland could occur due to human introduction factors 15,16 . Charan 20 stated that findings of C. batrachus in many rivers indicated highly spawning fecundity.…”