Sulawesi is an island famous for its biodiversity, including many endemic species. In particular, Sulawesi has the highest number of gobies in the world, including species with potential as food and/or ornamental fishes. The exploration of freshwater ichthyofauna is important in the context of Indonesian and global biodiversity. This research aimed to identify gobies found in the Luwuk Banggai area of Central Sulawesi, as a contribution to the exploration of Indonesian ichthyofaunal biodiversity. Gobies were sampled from January to March 2019 in the Biak and Koyoan Rivers. The sampled fish were measured and identified based on morphological characteristics. A total of 52 specimens were collected, and identified as belonging to 17 species within two families, the Gobiidae and Eleotridae. Gobies from the Koyoan River comprised 32 specimens from 8 species, while 20 specimens belonging to species were found in the Biak River. Only two species were found in both rivers: Stiphodon semoni and Sicyopterus lagocephalus. These results augment the body of knowledge regarding the presence and distribution of gobies in Indonesia
Ikan pelangi Iriatherina werneri diperdagangkan sebagai ikan hias, karena memiliki warna dan bentuk sirip yang indah terutama untuk individu jantan. Perkembangan budidaya ikan pelangi terkendala oleh kurangnya informasi biologi terkait perkembangan embrio (embriogenesis), perkembangan larva, viabilitas reproduksi dan sejarah kehidupannya. Tujuan dari penelitian untuk mengkaji embriogenesis, perkembangan larva dan viabilitas reproduksi pada ikan pelangi I. werneri sebagai informasi dasar untuk menunjang kegiatan budidaya dan konservasi. Pengamatan embriogenesis menggunakan 100 butir embrio yang dimasukkan pada empat buah wadah inkubasi berukuran (19,5 × 13,5 × 8,5) cm3. Pengamatan viabilitas reproduksi dan pertumbuhan menggunakan 200 butir embrio yang dimasukkan pada lima buah wadah berukuran (19,5 × 19,5 × 19,5) cm3. Hasil penelitian menunjukkan bahwa embrio ikan pelangi berkembang mulai dari fase pembelahan sel, morula, blastula, gastrula, organogenesis dan menetas menjadi larva pada saat 124 jam 5 menit setelah pembuahan. Telur mulai menetas pada hari keempat (15,11%) dan berakhir pada hari keenam (23,35%) dengan puncak penetasan terjadi pada hari kelima (61,54%) setelah pembuahan. Ikan telah menjadi juvenil pada umur 35 hari setelah menetas dengan panjang total >12 mm. Viabilitas reproduksi I. werneri pada penelitian ini yaitu tingkat penetasan sebesar 62,04%; tingkat kelangsungan hidup sampai umur 50 hari setelah menetas sebesar 62,72% dan ikan jantan secara alami sebanyak 20%.
Abstract. Putra AN, Mustahal, Syamsunarno MB, Hermawan D, Fatimah DG, Putri PB, Sevia, Isnaini R, Herjayanto M. 2021. Dietary Bacillus NP5 supplement impacts on growth, nutrient digestibility, immune response, and resistance to Aeromonas hydrophila infection of African Catfish, Clarias gariepinus. Biodiversitas 22: 253-261. This study aims to investigate the effects of Bacillus NP5 supplementation as a probiotic on growth, immune response, and resistance of African catfish to Aeromonas hydrophila infection. Catfish with an initial weight of 6.8 ± 0.1 g were fed with different doses of Bacillus NP5 (0%, 1.1%, 1.2% B, 1.3%, and 1.4%) with three replications and reared for 60 days. The first 45 days were used to observed growth performance, and the last 15 days were used to perform challenge tests against A. hydrophila infection. The results showed that the treatment of 1.2% Bacillus NP5 results in the highest specific growth rate (2.55±0.28 day-1) and increased protein and lipid digestibility significantly (P<0.05). Treatment of 1.1-1.3% Bacillus NP5 increase amylase and lipase activity that significantly higher than 0% Bacillus NP5 treatment. Supplementation of Bacillus NP5 significantly increased the leukocyte, phagocytic index, and survival rate in African catfish after A. hydrophila infection. Therefore, the supplementation of 1.2% Bacillus NP5 in the feed increased the growth, immune response, and African catfish resistance to the infection.
Oryzias sarasinorum atau disebut rono oleh masyarakat setempat merupakan ikan endemik di danau Lindu, Sulawesi Tengah, Indonesia. Ikan ini terancam punah di habitatnya, sehingga domestikasi (pemeliharaan dan pengembangbiakan) di lingkungan terkontrol mendesak dilakukan sebagai salah satu upaya konservasi. Salah satu dasar domestikasi ikan liar adalah pengetahuan terhadap habitat mereka. Tahap selajutnya yaitu membawa ikan tersebut dari habitat aslinya ke lingkungan terkontrol. Masalah pengangkutan ikan dengan sistem tertutup yaitu kematian, sehingga perlu penggunaan zeolit, arang aktif dan garam dalam air media pengangkutan. Perlakuan yaitu penambahan 20 g zeolit + 10 g arang aktif pada media air tanpa garam (A), 1 g L-1 garam (B), 2 g L-1 (C) dan tanpa zeolit, arang aktif dan garam (D). Tujuan penelitian yaitu menganalisis beberapa karekteristik habitat, sintasan selama pengangkutan dan pemeliharaan pascapengangkutan. Habitat ikan rono di pesisir Lovu danau Lindu memiliki dasar landai, substrat pasir kasar, warna air cokelat-teh, terdapat serasah, tanaman air Phragmites karka. Juwana dan larva ikan rono berenang bergerombol di sekitar tanaman dala yang terendam air. Ikan rono muda dan dewasa terlihat makan di atas substrat dasar perairan. Spesies ikan lain yang ditemukan di habitat ini yaitu nila Oreochromis sp., sepat Trichopodus sp., serta Gambusia affinis. Penambahan zeolit dan arang aktif selama pengangkutan dapat meningkatkan sintasan ikan rono dibandingkan tanpa penambahan. Perlakuan A menghasilkan sintasan yang lebih tinggi 62,50% dibandingkan B dan 37,50% dibandingkan C selama pemeliharaan pascapengangkutan pada penelitian ini.
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.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.