Risk Assessment of the Invasive Alien Species in Lake Tempe, South Sulawesi
Hikmah Maulifiah Zaim (a), Sharifuddin Bin Andy Omar (b*), Dewi Yanuarita (b), Joeharnani Tresnati (b), Nadiarti Nurdin Kadir(b), Suwarni (b)

(a) Master Programs of Fisheries Science, Department of Fisheries, Faculty of Marine Science and Fisheries, Hasanuddin University, Makassar, Indonesia,
*sb.andyomar[at]gmail.com
(b) Department of Fisheries, Faculty of Marine Science and Fisheries, Hasanuddin University, Makassar, Indonesia

Abstract

Invasive alien species is a strategic issue in Indonesia because their existence poses a threat to the preservation of biodiversity and the sustainability of ecosystem conservation. Currently, it is known that several alien species have dominated the waters of Lake Tempe so it is feared to affect native species populations, ecosystem processes, and the local economy. This research was conducted from January to June 2022 at Lake Tempe, South Sulawesi. Data collection on alien species was obtained from catches by fishermen using gill nets and bottom traps. Data collection on alien fish characteristics was obtained from literature studies. Analysis of the risk of the presence of alien species using the Freshwater Fish Risk Assessment Model (FRAM) method. The catch showed that in Lake Tempe there were 10 alien species with a positive correlation value of R2 = 0.52 (p <0.05) where the higher the probability of establishment outside their habitat, the higher the risk impact. The highest ecological risk value was found for the Amazon sailfin catfish (Pterygoplichthys pardalis), with a total of 58 indicating that the fish are invasive in Lake Tempe and have a pest status. Therefore, it is necessary to control the Amazon sailfin catfish by reducing the population through massive fishing and increasing its utilization.

Keywords: invasive species, ecological risk assessment, Pterygoplichthys pardalis, Tempe Lake, South Sulawesi

Topic: Aquatic Ecology and Conservation