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All Journal Bawal : Widya Riset Perikanan Tangkap Tomini Journal of Aquatic Science Journal of Social Research
Lady Ayu Sri Wijayanti
Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Computer Science & IT Economics, Econometrics & Finance Education Social Sciences

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Food Habits of Green Lobster (Panulirus Homarus) Fed with Calcium- and Phosphorus-Rich Feed Observed Using Artificial Intelligence “Smart Lobster-Culture” Rita Rostika; Kiki Haetami; Alexander Khan; Buntora Pasaribu; M. Ikhsan C.U; Lady Ayu Sri Wijayanti
Journal of Social Research Vol. 4 No. 3 (2025): Journal of Social Research
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/josr.v4i3.2464

Abstract

This study aims to investigate the food habits of green lobsters (Panulirus Homarus) when fed with natural feed rich in calcium and phosphorus, and to assess their growth performance, survival rate, and water quality in relation to different feeding treatments. The research was conducted in 2024 at the Marine Station of Pangandaran University, located in Pangandaran Regency. The study utilized a Complete Random Design (RAL) with four different feeding treatments over 6 x 10 days: A (80% anchovy feeding), B (100% anchovy feeding), C (80% rebon feeding), and D (100% rebon feeding). The parameters observed include Growth Rate based on Length (LPP) and Weight (LPB), Survival Rate (SR), and Water Quality. Additionally, natural feed habits were monitored using the AI Smart Lobster Culture version 1. The results showed that lobsters fed with 100% anchovy and rebon (treatments B and D) exhibited the highest weight increase, with values of 61.4 and 65.1, respectively, while treatments A and C showed no significant differences. The Survival Rate (SR) across all treatments (A, B, C, and D) was excellent, with an SR of 96%. The findings indicate that both anchovy and rebon, rich in calcium and phosphorus, are effective in supporting lobster growth and survival. In conclusion, this study demonstrates that feeding green lobsters with 100% calcium and phosphorus-rich feed, such as anchovies and rebon, promotes optimal growth and survival, highlighting the importance of feed composition in lobster culture.
PENGARUH VARIABILITAS OSEANOGRAFI TERHADAP CPUE IKAN TONGKOL (Euthynnus spp) MENGGUNAKAN GENERALIZED ADDITIVE MODEL DI PERAIRAN TERNATE Gilar Budi Pratama; Lady Ayu Sri Wijayanti; Mochhamad Ikhsan Cahya Utama; Nurani Khoerunnisa; Aisyah Aisyah
BAWAL Widya Riset Perikanan Tangkap Vol 18, No 1 (2026): April 2026
Publisher : Politeknik Kelautan dan Perikanan Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/bawal.18.1.2026.23-33

Abstract

Perairan Maluku merupakan salah satu wilayah perikanan strategis di Indonesia yang berperan sebagai habitat penting bagi ikan tongkol (Euthynnus spp.), komoditas pelagis bernilai ekonomi tinggi. Distribusi dan kelimpahan ikan tongkol di wilayah ini sangat dipengaruhi oleh dinamika oseanografi yang bersifat spasial dan temporal. Penelitian ini bertujuan untuk menganalisis pengaruh berbagai parameter oseanografi terhadap variasi Catch Per Unit Effort (CPUE) ikan tongkol di perairan sekitar PPN Ternate selama periode 2021–2023. Analisis dilakukan menggunakan pendekatan Generalized Additive Model (GAM) untuk menangkap hubungan non-linear antara CPUE dan variabel lingkungan. Variabel prediktor yang digunakan meliputi suhu permukaan laut, konsentrasi klorofil-a, kecepatan arus, salinitas, tinggi muka air laut, dan intensitas thermal front. Hasil pemodelan menunjukkan bahwa kombinasi seluruh variabel menghasilkan model terbaik dengan nilai Akaike Information Criterion (AIC) sebesar 453,72, yang mengindikasikan bahwa variasi CPUE tongkol lebih akurat dijelaskan oleh interaksi multivariabel dibandingkan pengaruh variabel tunggal. Uji signifikansi menunjukkan bahwa klorofil-a (p = 0,0356), kecepatan arus (p = 0,0041), dan thermal front (p = 0,0483) berpengaruh nyata terhadap CPUE. Kurva respons mengindikasikan bahwa produktivitas primer, dinamika arus, dan keberadaan thermal front merupakan faktor utama yang mengendalikan pola agregasi ikan tongkol di perairan PPN Ternate.
REKONSTRUKSI DAN PROYEKSI KONDISI LINGKUNGAN TELUK JAKARTA BERDASARKAN KEJADIAN MUSIM UBUR-UBUR TAHUN 2018 DAN 2019 Afriel Alex Handro Lumban-Gaol; Mochamad Ramdhan Firdaus; Dearlyn Merry Christine Togatorop; Darrell Ariel Saiman; Lady Ayu Sri Wijayanti; Unggul Handoko
BAWAL Widya Riset Perikanan Tangkap Vol 17, No 3 (2025): Desember 2025
Publisher : Politeknik Kelautan dan Perikanan Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/bawal.17.3.2025.179 - 197

Abstract

Peningkatan populasi ubur-ubur yang tinggi dilaporkan terjadi di Teluk Jakarta pada Oktober 2018 dan 2019. Namun, informasi ilmiah mengenai fenomena ini masih terbatas, terutama dari aspek lingkungannya. Penelitian ini merekonstruksi kondisi lingkungan laut Teluk Jakarta berdasarkan kejadian musim ubur-ubur tahun 2018 dan 2019, serta memproyeksikan variasi lingkungan sebelum dan sesudah kejadian tersebut dengan menganalisis deret waktu 2014–2024. Analisis dilakukan menggunakan data sea surface temperature (SST) dan sea surface salinity (SSS) dari model CMEMS GLORYS12V1, serta curah hujan dari reanalisis CHIRPS. Variabilitas iklim diobservasi menggunakan indeks Indian Ocean Dipole (DMI) dan El Niño–Southern Oscillation (SOI). Analisis deret waktu meliputi Empirical Orthogonal Function (EOF), Continuous Wavelet Transform (CWT), dan Power Spectral Density (PSD). Anomali lingkungan dievaluasi dengan membandingkan kondisi perairan pada periode Time of Interest (ToI) 2018 dan 2019 terhadap anomali sebelum ToI (2014–2017) dan sesudahnya (2020–2024). Verifikasi kebenaran peristiwa ledakan populasi ubur-ubur dilakukan melalui cross-checking terhadap wawancara, survei lapangan, dan laporan berita (2010–2024). Hasil penelitian menunjukkan bahwa ledakan populasi ubur-ubur benar terjadi di Teluk Jakarta pada Oktober 2018 dan 2019, tanpa ditemukan laporan serupa di tahun lainnya. Variabilitas iklim mengindikasikan dominasi pengaruh IOD akibat lemahnya pengaruh ENSO yang mendekati netral pada periode ToI. Dominasi IOD terlihat dari anomali peningkatan SSS, serta anomali penurunan SST dan curah hujan. Kombinasi kondisi tersebut diduga dapat mendukung strobilasi dan pertumbuhan ephyra ubur-ubur, sehingga mendorong peningkatan populasi. Pendekatan rekonstruksi berbasis kejadian ini memperluas konteks temporal untuk memahami hubungan antara karakteristik perairan dan variabilitas iklim terhadap respon ekologi ubur-ubur di Teluk Jakarta.
The Effect of Liquid Organic Fertilizer Application on the Growth of Microalgae Chlorella sp. Lady Ayu Sri Wijayanti; Mochhamad Ikhsan Cahya Utama; Andini Nur Afifah; Annisa Rahmah Septiani; Muhammad Wijatmikko Ginang Pratidnia; Yuyun Yuningsih; Sara Umbekna; Sitty Ainsyah Habibie
Tomini Journal of Aquatic Science VOLUME 4 ISSUE 1, NOVEMBER 2025
Publisher : Gorontalo State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/tjas.v4i1.33254

Abstract

Microalgae such as Chlorella sp. are valuable for their potential in sustainable food, feed, and bioenergy production, but their cultivation often relies on costly synthetic nutrients. Exploring alternative nutrient sources, such as liquid organic fertilizers, may offer a more economical and environmentally friendly approach to biomass production. This study aims to evaluate the effect of liquid organic fertilizer application on the growth of Chlorella sp. in a closed culture system. Seven treatments were used: one control without fertilizer (K) and six treatments with increasing fertilizer doses (P1–P6). The observed parameters included initial and final cell density, as well as daily growth rate during a seven-day incubation period. The results showed that fertilizer application had a significant effect on the growth enhancement of Chlorella sp. The highest final cell density was recorded in treatment P6, exceeding 6.3 × 10⁷ cells/ml, while a population decline was observed in the control group. The daily growth rate also increased with higher fertilizer doses, with the highest value (μ = 0.36) observed in P6. Linear regression analysis showed a strong relationship between fertilizer amount and growth rate (r = 0.8493; p = 0.0156; R² = 0.7213), indicating that growth variation could be significantly explained by the amount of fertilizer applied. The conclusion of this study is that liquid organic fertilizer has great potential as an efficient and environmentally friendly alternative for microalgae culture media. Proper dosage formulation can support optimal microalgal biomass production. Further research is needed to identify the dominant nutrient content in the fertilizer and to assess the biomass quality for potential applications in food, feed, or bioenergy sectors.
Preliminary Study of Surface Water Quality Based on DO and BOD Parameters in Pangandaran Reservoir Lady Ayu Sri Wijayanti; Nurani Khoerunnisa; Helmalia Asri; Veronica Veronica; Irna Salwa Al Iksani; Mella Anggraeni; Gilar Budi Pratama; Sitty Ainsyah Habibie
Tomini Journal of Aquatic Science VOLUME 4 ISSUE 1, NOVEMBER 2025
Publisher : Gorontalo State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/tjas.v4i1.33138

Abstract

Pangandaran Reservoir, located in Pangandaran Regency, West Java, serves as a water conservation facility and supports aquaculture activities. Its water quality, particularly in terms of dissolved oxygen (DO) and biochemical oxygen demand (BOD₅), is a key indicator for maintaining the reservoir's ecological and socio-economic functions. This study aims to analyze DO and BOD₅ parameters in Pangandaran Reservoir and evaluate their compliance with applicable water quality standards. Sampling was conducted in May 2025 at four stations representing both the inflow area and the inner reservoir waters. DO levels were measured using the Winkler titration method, while BOD₅ was determined based on the difference in DO concentrations before and after a five-day incubation period. The results showed that water temperatures ranged from 32 to 32.5°C, slightly exceeding the water quality threshold, likely due to high solar radiation and limited vegetation cover. The pH ranged from 7 to 9, which is still within the safe range, with higher pH values observed in the inflow area, influenced by the dominance of limestone (karst) formations in the surrounding Pangandaran region. The highest DO concentration was recorded at Station 4 (4.32 mg. L-1), while the lowest was at Station 2 (3.40 mg. L-1). Conversely, the highest BOD₅ values were found at Station 2 (8.3 mg. L-1) and Station 1 (8 mg. L-1). The spatial distribution pattern indicates a negative relationship between DO and BOD₅, where high organic pollutant loads in the inflow area reduce dissolved oxygen levels. Overall, the water quality of Pangandaran Reservoir falls within Class 2 to Class 4 based on Government Regulation No. 82 of 2001, with signs of declining quality in the inflow area. Therefore, pollution source control and routine monitoring are essential to preserve the aquatic ecosystem of the reservoir.
Co-Authors Afriel Alex Handro Lumban-Gaol Aisyah Aisyah Alexander Khan Andini Nur Afifah Annisa Rahmah Septiani Buntora Pasaribu Darrell Ariel Saiman Dearlyn Merry Christine Togatorop Gilar Budi Pratama Helmalia Asri Irna Salwa Al Iksani Kiki Haetami M. Ikhsan C.U Mella Anggraeni Mochamad Ramdhan Firdaus Mochhamad Ikhsan Cahya Utama Muhammad Wijatmikko Ginang Pratidnia Nurani Khoerunnisa Rita Rostika Sara Umbekna Sitty Ainsyah Habibie Unggul Handoko Veronica Veronica Yuyun Yuningsih