Population dynamic of bungo fish (Glossogobius giuris) in three integrated lakes (Danau Tempe, Danau Sidenreng, and Danau Lampokka) South Sulawesi during rainy season

Abstract

The rapid growth and production of bungo fish without management efforts will threaten the sustainability of endemic fish in the three lakes (Tempe Lake, Sidenreng Lake and Lapompakka Lake) which are located in the central part of the South Sulawesi region. In order to manage Bungo fish resources, information on population dynamics is needed. This research aims to save the Bungo fish species which are endemic to Tempe, Sidenreng, and Lapompakka Lakes, and other lakes in South Sulawesi from the threat of extinction. Bungo fish samples (Glossogobius giuris) were collected from fishermen's catch during July - September 2020 in three lakes, namely the waters of Tempe Lake, Sidenreng Lake, and Lapompakka Lake. Sample measurements were carried out at the Laboratory of Fish Biology, Faculty of Marine and Fisheries Sciences, Hasanuddin University. The results showed that Lake Sidenreng had more age groups of bungo fish compared to Lake Tempe and Lake Lapompakka. The lengths found in Lake Tempe were longer than those found in Lake Sidenreng and Lake Lapompakka, and the smallest length of bungo fish was found in Lake Lapompakka. Bungo fish found in Sidenreng Lake and Lapompakka Lake are classified as fast growth because the K value is greater than 0.5, while in Lake Tempe it is classified as slow because it is smaller than 0.5. The natural mortality rate of bungo fish was more prevalent in bungo fish aged around 1 and 2 years and this was found in all three waters. Mortality that occurred at the three locations was due to natural mortality because the M value was greater than the F value.