The recently described Stiphodon annieae (Keith & Hadiaty, 2014) was thought to be endemic to Halmahera Island, Indonesia. However, from August 2019 to January 2020, we collected several specimens during field trips to the Soho, Simpong, and Uso rivers in Luwuk Banggai, Central Sulawesi, Indonesia. We describe specimens collected in the Soho River and discuss the ichthyofauna of Luwuk Banggai. This is the first report of S. annieae from Sulawesi. Our records represent a range extension of approximately 500–600 km west of this species’ type locality on the island of Halmahera. 

Luwuk Banggai in Central Sulawesi Province, Indonesia, is a part of Sulawesi Island in the Wallacea Region with many rivers. These rivers host a high diversity of aquatic species, but this diversity is poorly known. This calls for taxonomic exploration, in particular for the fishes belonging to the Order Gobioidei, commonly called gobies. This study aimed to identify gobies present in rivers Luwuk Banggai, both as a contribution to scientific knowledge on goby biodiversity and distribution and to inform the management of (hitherto unregulated) aquatic resources by the local government agencies involved. The establishment of effective, science-based management is especially important and urgent for those gobies which have economic potential, in particular as freshwater ornamental commodities. The study was conducted from January to July 2019 in several Luwuk Banggai rivers: Mendono River, Mendono Village; Koyoan River; Simpong River; Soho River; Biak River; Honduhon River; Matanyo River; and Salodik River. The specimens obtained (n = 203) were measured and identified based on species-specific characteristics. Species belonging to the Family Gobiidae were more abundant (161 individuals from 20 species) than those in the Family Eleotridae (42 individuals from 6 species). One species commonly found in these rivers was Lentipes mekonggaensis (30 individuals).

Stiphodon surrufus Watson & Kottelat, 1995, with its recent synonym S. birdsong Watson, 1996, is recorded from widely separated locations in the Western Pacific, including Papua and Halmahera in eastern Indonesia. We collected a single specimen of male S. surrufus from the Bohi River, Banggai District, Central Sulawesi Province, Indonesia in 2019; this represents the first record of S. surrufus from Sulawesi, the largest island in the Wallacea biodiversity hotspot. Three additional specimens were collected in 2020, one in 2021, and two in 2022, all from the same site. These records expand the known distribution of a naturally rare but widespread sicydiine goby and contribute to the underexplored but increasingly threatened Sulawesian riverine ichthyofauna.

Title (Bahasa Indonesia): Analisis pati sagu yang difermentasi dengan proses aerob dan anaerob sebagai bahan alternatif pengganti tepung ikan Fish meal is commonly used as the main ingredient in aqua feeds. In this study, sago (Metroxylon spp.) starch was fermented through aerobic and anaerobic processes using Rhizophus sp. The duration of fermentation was 10 days. Based on proximate analysis, the unfermented sago starch had protein content of 1.11%, while the fermented one showed five to eight times increased protein level. The carbohydrate, lipid, and ash contents were found to decline in both aerobic and anaerobic fermentation. On the other hand, water content and crude fiber increased in both aerobic and anaerobic processes. Tepung ikan umumnya digunakan sebagai bahan baku utama dalam pakan organisme budidaya. Dalam penelitian ini, bahan pati sagu (Metroxylon spp.) difermentasi secara aerob maupun anaerob dengan menggunakan Rhizopus sp. Lamanya fermentasi adalah 10 hari. Berdasarkan hasil uji proksimat, kandungan protein pati sagu tanpa fermentasi adalah 1,11 %, sedangkan bahan pati sagu yang difermentasi memperlihatkan peningkatan kandungan nilai proteinnya sebanyak lima sampai delapan kali. Kandungan karbohidrat, lemak, dan kadar abu berkurang pada kedua fermentasi aerob dan anaerob. Sebaliknya, kadar air dan serat kasar meningkat pada kedua proses aerob dan anaerob.