Diversity studies of freshwater goby species from three rivers ecosystem in Luwuk Banggai, Central Sulawesi, Indonesia

Abstract

Inland public water areas which include freshwater lakes and several rivers in Sulawesi Island have native and endemic fish species which potential as ornamental fish. One of them is a member of Gobiidae. Several studies have reported the species of freshwater goby in Central Sulawesi Province. However, the information is still lacking, especially in the Luwuk Banggai, Central Sulawesi. Therefore, research is needed to examine the diversity of gobies in this area. Observations were conducted in three rivers (Salodik, Kintom, and Simpong). The results of fish inventory in the three Luwuk Banggai rivers obtained 131 fish specimens, namely 26 specimens from the Salodik river, 29 specimens from the Kintom river, and 76 specimens from the Simpong river. The Simpong River has the highest Shannon-Wiener index (H’) followed by the Kintom and Salodik rivers, which are 2.6313, 2.0114, and 1.3656, respectively. Similarity analysis of the three rivers produced 2 clusters. The Salodik River in fish diversity shows differences with the other two rivers, while the Simpong and Kintom rivers are in one cluster. Further research is needed related to the biodiversity of gobies and their relationship to habitat characteristics and river water quality in the Luwuk Banggai.

Diversity and distribution of goby-fry fish in Tomini Bay, Gorontalo, Indonesia

“…On the other hand, S. zosterophorus can be found in various locations, ranging from Sumatra (Indonesia) to South Japan, Vanuatu, and New Caledonia (Keith et al, 2015). It is also found in Koyoan, Sulawesi, Indonesia (Gani et al, 2019), eight rivers in the Luwuk Banggai (Gani et al, 2019), and Simpong (Gani et al, 2021). This species inhabits clear, fast-flowing rivers with pebbly water substrates (Keith et al, 2015).…”

First and recurrent records of Stiphodon surrufus Watson & Kottelat, 1995 (Gobiiformes, Gobiidae, Sicydiinae), a naturally rare amphidromous goby, in Sulawesi, Indonesia

“…Although most rivers in eastern Indonesia, including Papua, Halmahera, and Sulawesi, are generally considered to be relatively free from industrial pollution compared to western Indonesia, mining and land conversion are increasing threats to many regions of Sulawesi, including Banggai District (Lasut et al 2010;Muhammad et al 2012;Ambo-Rappe and Moore 2019;Rijal et al 2019;Kadir et al 2020). No S. surrufus were found during ichthyological expeditions to 11 nearby rivers (Gani et al 2019(Gani et al , 2020(Gani et al , 2021a(Gani et al , 2021b; however, sampling efforts to date represent limited stretches of a tiny proportion of the rivers and streams potentially providing suitable habitat in Central Sulawesi Province. Further data collection efforts are needed to assess the abundance and distribution of S. surrufus in the Bohi River and similar riverine habitat nearby, along the east coast of Sulawesi, and in other areas of Sulawesi, and to determine the threats facing each watershed.…”

Bathymetry mapping in Luwuk-Banggai Waters, (Eastern Waters of Indonesia) using multibeam echosounder

“…Luwuk, Banggai Regency is one of the autonomous regions and is included in the Central Sulawesi Province in Luwuk, located at coordinates between 122°23' and 124°20' east longitude and 0°30' and 2°20' south latitude, which has an area of 9,672.70 km² or around 14.22% of the area of Central Sulawesi Province, and a sea area of 20,309.68 km² with a coastline of 613.25 km [1][2] . This Regency is one of the areas with the longest coastline, and in the past, it was known as a community port.…”