Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Has a non-native cichlid of the genus Amatitlania (Actinopterygii, Cichlidae) adapted to the headwaters in Brazilian semi-arid?

Abstract

Several fish species from Central America and other regions have been introduced into Brazil. In this study, we evaluated the bioecological aspects of a non-native cichlid of the genus Amatitlania (convict cichlid) and its possible establishment in high-altitude forest enclaves of semi-arid Northeastern Brazil. Specimens of Amatitlania nigrofasciata (Günther, 1867) were captured in a local stream displaying abiotic conditions like those of its natural range of distribution. The individuals collected were predominantly adult, insectivorous and displayed normal length-weight relationships, although we observed some phenotypical plasticity (variation in body depth, and a morphologically abnormal dorsal fin in three cases). Our results indicate that A. nigrofasciata has successfully colonized an Atlantic forest enclave in the Brazilian semi-arid region, making it necessary to adopt measures to prevent the species from spreading to other water bodies in the surroundings.