A biological perspective for the fishery management of a small urban lake in ndonesia: a case study on the reproductive stage of the red devil (Amphilopus citrinellus) in Situ Cilodong, West Java, Indonesia

The presence and establishment of invasive alien fish species is one of the biggest threats to aquatic biodiversity. The red devil, Amphilopus citrinellus, is one of the emerging invasive species and itsoccurrence is massively detected in common water bodies in tropical areas such as Indonesia. However, thetopic remains under-reported from the small urban lakes. This study aims to present the reproductivecharacteristics of the fish in Situ Cilodong, a small urban lake in the country, that can be used as a principalreference for population control. The sampling was conducted in June 2021 and May 2022 using a mix ofseven mesh-sized gillnets. The results of the length-weight relationship reveal that both the female and malefish perform isometric growth type. The calculated Gonad Somatic Index (GSI) and the histological analysisconfirmed that the fish is a multi-spawner species. The results imply that sustainable population controlefforts must include intensive catch and engage a participatory approach between the legal authority and thelocal fishers.