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.

中文翻译：

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Amatitlania属（Actinopterygii，Cichlidae）的非本地丽鱼科植物是否适应了巴西半干旱的源头？

来自中美洲和其他地区的几种鱼类已被引入巴西。在这项研究中，我们评估了该属非本地鲷的生物生态学方面Amatitlania在半干旱的巴西东北部的高海拔森林飞地（犯人鲷）及其可能成立。Amatitlania nigrofasciata（Günther，1867）的标本被捕获在局部溪流中，显示出非生物条件，例如其自然分布范围。尽管我们观察到了一些表型可塑性（体深变化和三例背鳍形态异常），但收集到的个体主要是成虫，食虫性的，并且显示出正常的身高体重关系。我们的结果表明黑曲霉 已成功在巴西半干旱地区的大西洋森林飞地定居，因此有必要采取措施防止该物种扩散到周围的其他水体。