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All Journal Student Scientific Creativity Journal Jurnal Ilmiah Dan Karya Mahasiswa Green Engineering: Journal of Engineering and Applied Science
Indri Afriani Yasin
Universitas Muhammadiyah Gorontalo
Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Social Sciences

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Perbandingan Pakan Alami Berbeda terhadap Pertumbuhan dan Kelangsungan Hidup Benih Ikan Nila (Oreochromis Niloticus) Mohammad Ilyas Yunus; Dewi Shinta Achmad; Indri Afriani Yasin; Tusaban Tusaban
Student Scientific Creativity Journal Vol. 4 No. 3 (2026): Student Scientific Creativity Journal
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/sscj-amik.v4i3.6131

Abstract

Nile tilapia (Oreochromis niloticus) culture requires an efficient and low-cost feeding strategy that can support fry growth and survival. This study aimed to analyze the effects of three types of natural feed, namely silk worms, earthworms, and snails, on absolute length growth, absolute weight growth, and survival of Nile tilapia fry. The study was conducted at the Aquaculture Laboratory, Faculty of Science and Computer Science, Universitas Muhammadiyah Gorontalo, from January 31 to March 2, 2026. An experimental method was applied using a Completely Randomized Design consisting of three treatments and three replications. A total of 45 Nile tilapia fry were reared in 9 plastic containers filled with 10 L of water, with 5 fish in each container. Growth and survival data were analyzed using ANOVA at the 5% significance level, while water quality was analyzed descriptively. The results showed that the type of natural feed had no significant effect on absolute length growth, absolute weight growth, and survival. Descriptively, silk worms produced the highest length and weight growth, with values of 2.99 cm and 6.37 g, respectively. Snails produced the highest survival rate of 86.66%. Water quality remained stable, with temperature ranging from 26.3 to 26.8°C, pH from 7.6 to 7.9, and dissolved oxygen from 5.2 to 5.6 mg/L. These findings indicate that silk worms are potential natural feed for improving growth, while snails support the survival of Nile tilapia fry.
Length Weight Relationship and Condition Factor of Yellowstripe Scad Selaroides leptolepis in Banda Sea Waters, Morowali Ahmad Musyali; Indri Afriani Yasin; Talha Dangkua; Dewi Shinta Achmad; Arfan Tilome
Green Engineering: International Journal of Engineering and Applied Science Vol. 3 No. 3 (2026): Juli : Green Engineering: International Journal of Engineering and Applied Scie
Publisher : International Forum of Researchers and Lecturers

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70062/greenengineering.v3i3.298

Abstract

Yellowstripe scad (Selaroides leptolepis) is an economically important small pelagic fish that supports coastal livelihoods and local food supply in Morowali, Central Sulawesi. Increasing fishing pressure in Banda Sea waters requires location-specific biological information to guide sustainable management. This study analyzed length-frequency distribution, length-weight relationship, growth pattern, and condition factor of yellowstripe scad landed in Bete-Bete Village, Bahodopi District, Morowali Regency. Sampling was conducted from March to May 2026 using 450 individuals obtained from local fishers, with approximately 150 fish sampled each month. Total length ranged from 138 to 203 mm, and catches were dominated by the 171–190 mm size range, especially the 178–183 mm and 184–190 mm classes. Length-weight relationships showed strong positive associations, with coefficients of determination ranging from 79.88% to 94.79%. Growth was generally isometric across sex and month, except for male fish in March, which showed negative allometric growth. Condition factor values were mostly above 1.0 and generally ranged from approximately 1.0 to 1.4, indicating good physiological condition and sufficient habitat support. The findings indicate that yellowstripe scad in Banda Sea waters around Morowali remain in relatively healthy biological condition. However, precautionary management is still required through minimum catch-size regulation, improved gear selectivity, and routine landing-site monitoring.
Kelayakan Ekonomi di Tengah Tekanan Ekologis Budidaya Ikan Nila Sistem Keramba Jaring Apung di Danau Limboto Muh.Mustakim Udin; Indri Afriani Yasin; Dewi Shinta Achmad; Nur Jihan Fareranty Piu
Jurnal Ilmiah Dan Karya Mahasiswa Vol. 4 No. 4 (2026): Agustus : JURNAL ILMIAH DAN KARYA MAHASISWA (JIKMA)
Publisher : Institut Teknologi dan Bisnis (ITB) Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54066/jikma.v4i4.4788

Abstract

Nile tilapia farming in floating net cages in Lake Limboto provides economic benefits for local communities, yet it operates within an ecosystem affected by lake shallowing, low water transparency, high phosphate concentration, and organic matter accumulation. This study analyzes aquaculture feasibility by integrating ecological, technical, social, and economic dimensions. A descriptive quantitative and qualitative approach was applied. Data were collected through water quality measurement, observation of farming practices, interviews, questionnaires involving 30 respondents, and secondary data review. Economic analysis covered 25 farmers with complete cost and revenue records using the Revenue Cost Ratio. The results show that temperature, pH, dissolved oxygen, nitrate, and nitrite remain supportive of tilapia culture. In contrast, water depth, transparency, phosphate, and organic matter are major ecological constraints. Technically, local farmers are familiar with floating net cages, while access to seed and feed is adequate. Social support is also strong, as 90.0 percent of respondents reported community support and 93.3 percent stated that aquaculture contributes to household income. Average production cost was IDR 7,524,000 per cycle, revenue was IDR 10,508,000, and profit was IDR 2,984,000. The Revenue Cost Ratio of 1.40 indicates economic feasibility, with 24 of 25 businesses classified as feasible. These findings reveal a clear imbalance between economic profitability and ecological pressure. Nile tilapia farming in Lake Limboto is therefore conditionally feasible and should only be developed through aquaculture zoning, stocking control, feed efficiency, and regular water quality monitoring.
Co-Authors Ahmad Musyali Arfan Tilome Dewi Shinta Achmad Mohammad Ilyas Yunus Muh.Mustakim Udin Nur Jihan Fareranty Piu Talha Dangkua Tusaban, Tusaban