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JURNAL RISET DIWA BAHARI
Published by Institut Teknologi dan Bisnis Maritim Balik Diwa
ISSN : -     EISSN : 30323177     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Immunology & microbiology
Jurnal Riset Diwa Bahari merupakan jurnal yang diterbitkan oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa, Makassar. Jurnal Riset Diwa Bahari menerima naskah penelitian dan ulasan mengenai biologi kelautan, ekologi perairan, perikanan (budidaya ikan, penangkapan ikan, pengolahan, keanekaragaman spesies, alat tangkap), pencemaran udara, penginderaan jauh kelautan, mikrobiologi, bioteknologi, dan pengelolaan pesisir.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 54 Documents
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Pengaruh Pemberian Onggok Yang Difermentasi dengan Limbah Cumi-Cumi (Sepia sp) pada Kinerja Pertumbuhan Ikan Nila (Oreochromis niloticus) dengan Pemberian Onggok Yang Difermentasi dengan Limbah Cumi-Cumi (Sepia sp) Cahyono, Indra; Rahmat, Nur; Nursyahran, Nursyahran; Mulyani, Sri
Jurnal Riset Diwa Bahari (JRDB) Volume 3, Nomor 1, 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v3i1.45

Abstract

This study aims to evaluate the effect of fermented cassava with squid tapioca waste on the growth, survival, and feed quality of earthworms (Lumbricus rubellus) and tilapia (Oreochromis niloticus). This study used a Completely Randomized Design (CRD) with three treatments, namely the concentration of fermented cassava (10 ml, 15 ml, and 20 ml) in varying tapioca waste. The results showed that the highest specific growth rate (SGR) and increase in body length of earthworms were found in the treatment of fermented cassava 20 ml (treatment C) with values ​​of 4.40% and 19.2 mm respectively and the highest survival rate (SH) of 89.16%. Earthworm feed fermented cassava also had a positive effect on the growth of tilapia with the highest SGR value in treatment C of 1.17% and the survival rate of tilapia reaching 93.33%. Water quality parameters throughout the study remained within the optimal range for both organisms, with temperature, pH, and dissolved oxygen levels suitable for tilapia growth. This study concluded that fermentation of tapioca waste with squid by-products can improve feed quality, accelerate growth, and increase the survival rate of earthworms and tilapia, making it a sustainable alternative feed source in tilapia cultivation
Karakteristik Mekanik Selulosa Dari Rumput Laut Kappaphycus alvarezii di Kabupaten Takalar Putri, Tri Widayati; Yusra, Reski Ardini; Awaluddin, Awaluddin
Jurnal Riset Diwa Bahari (JRDB) Volume 3, Nomor 1, 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v3i1.71

Abstract

Kandungan selulosa dan karakteristik mekanik selulosa dalam menentukan kelayakan rumput laut sebagai bahan baku biomaterial ramah lingkungan, selain sifat fisikokimia selulosa diperlukan untuk menunjang pemanfaatan limbah rumput laut secara optimal. Sehubungan dengan hal tersebut, penelitian ini bertujuan untuk menganalisis kadar dan karakteristik mekanik selulosa dari rumput laut Kappaphycus alvarezii yang berasal dari Kabupaten Takalar. Penelitian ini dilaksanakan dari bulan September hingga Januari 2025 di Makassar, dengan menggunakan pendekatan deskriptif melalui metode kualitatif. Hasil penelitian menunjukkan bahwa kadar selulosa meningkat dari 12,31% pada sampel mentah menjadi 20,04% setelah proses ekstraksi. Analisis FTIR mengidentifikasi gugus fungsi khas selulosa seperti –OH, C=O, dan C–O–C, sementara SEM menunjukkan perubahan morfologi menjadi lebih berpori dan homogen setelah perlakuan kimia. Temuan ini mengindikasikan bahwa Kappaphycus alvarezii berpotensi tinggi sebagai sumber bahan selulosa yang dapat dikembangkan untuk keperluan bioplastik atau biomaterial lainnya.
Umur Simpan dan Mutu Sensori Siomay Berbahan Baku Surimi Ikan Tenggiri (Scombereromorus commerson) Putri, Elis Eka; Harianti, Harianti; Angraeni, Husni
Jurnal Riset Diwa Bahari (JRDB) Volume 3, Nomor 1, 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v3i1.77

Abstract

This study aimed to evaluate the shelf life and sensory quality of siomay made from mackerel (Scomberomorus commerson) surimi. The study involved the preparation of siomay using surimi as the main ingredient, followed by sensory evaluation and microbiological analysis to determine the shelf life. The results showed that the sensory quality of siomay decreased with storage time, with significant differences observed in appearance, color, aroma, texture, and taste. These findings suggest that the optimal storage time to maintain sensory quality is within the range of 0 to 12 hours after preparation. This study provides valuable insights for the seafood processing industry regarding the utilization of mackerel surimi in producing high-quality siomay.
Penambahan Tepung Cangkang Kerang Simping (Placuna Placenta) Terhadap Peningkatan Kalsium, Fosfor dan Magnesium Pada Pakan Karim, Mutemainna; Ardiansyah, Ardiansyah; Sofyan, Jawiana Saokani; Nursyahran, Nursyahran
Jurnal Riset Diwa Bahari (JRDB) Volume 3, Nomor 1, 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v3i1.78

Abstract

This study aimed to evaluate the potential of scallop shell meal (Placuna placenta) as a natural mineral source to increase calcium (Ca), phosphorus (P), and magnesium (Mg) content in fish feed formulations. The study used an experimental design with four treatments of shell meal supplementation levels (0%, 10%, 20%, and 30%). Laboratory analysis showed that increasing the concentration of scallop shell meal significantly increased the levels of Ca and Mg in the feed, with the highest values being 92,656.67 µg/g and 2,006.03 µg/g, respectively, at the 30% treatment. Conversely, phosphorus levels decreased with increasing shell meal dosage. The results of the ANOVA test and Tukey's follow-up test showed significant differences (p<0.05) between treatments. This study proves that scallop shell meal can be used as an effective, inexpensive, and environmentally friendly natural mineral additive in fish feed, especially in supporting bone mineralization and energy metabolism
Etika Pelayanan Akademik di Program Studi Hukum Bisnis ITBM Balik Diwa Luthfi Siraj, Muhammad; Suprianto, Suprianto
Jurnal Riset Diwa Bahari (JRDB) Volume 3, Nomor 2, 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v3i2.88

Abstract

This study aims to analyze the academic service ethics of employees at the Balik Diwa Institute of Business and Maritime Technology (ITBM), focusing on three main dimensions: integrity, loyalty, and fairness. Academic service ethics are crucial in creating student satisfaction as users of educational services. This study used a descriptive qualitative method with data collection techniques through interviews, observation, and documentation. Data analysis was conducted using an interactive model that includes data condensation, data presentation, as well as drawing conclusions and verification. The results show that the academic service ethics at ITBM Balik Diwa are quite good, but there are still several weaknesses. In the integrity dimension, employees have demonstrated courage in enforcing regulations, but there is still a sense of bias. In the loyalty dimension, employees demonstrate a love for their work and loyalty to the institution, although coordination between employees needs to be improved. In the justice dimension, employees are generally fair, but are still less open to student complaints, which is why ITBM Balik Diwa urgently needs continuous evaluation and development to strengthen academic service ethics so that services to students are more professional and with high integrity
Assessing the Global Cultivation Practices of Kappaphycus alvarezii: A Comprehensive Review of Growth Dynamics, Nutrient Management, and Biochemical Composition Mulyani, Sri
Jurnal Riset Diwa Bahari (JRDB) Volume 3, Nomor 2, 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v3i2.95

Abstract

Kappaphycus alvarezii is a crucial species for carrageenan production, widely used in various industries. This review aims to synthesize global research on the cultivation of K. alvarezii, focusing on growth dynamics, nutrient management, and biochemical composition. Studies show that growth rates are significantly influenced by cultivation methods, such as longline, raft farming, and Integrated Multi-Trophic Aquaculture (IMTA), each offering distinct advantages in terms of yield and ecological sustainability. Nutrient management, particularly nitrogen and phosphorus level, plays a critical role in optimizing both biomass and carrageenan quality. The use of biostimulants and fertilizers has been found to enhance growth and biochemical properties, yet careful nutrient control is essential to prevent negative environmental impacts such as eutrophication. Genetic diversity, particularly through the selection of wild versus cultivated strains, is another important factor in farm resilience. Wild strains provide greater environmental adaptability and disease resistance, while selected strains typically offer faster growth and higher yields. However, the reduced genetic diversity in clonal farming raises concerns about long-term sustainability. Research gaps identified include the need for long-term studies on the sustainability of farming techniques, particularly in the context of climate change, and more extensive investigations into the ecological and economic benefits of IMTA systems. Future research should focus on integrating biological, ecological, and economic aspects to optimize K. alvarezii farming and enhance its contribution to the blue economy
Bioreproduktif dan Distribusi Ukuran Populasi dalam Menentukan Ukuran Layak Tangkap Ikan Tembang (Sardinella fimbriata Valenciennes, 1847) dari Perairan Selat Makassar Kantun, Wayan; Bitti, Amel
Jurnal Riset Diwa Bahari (JRDB) Volume 3, Nomor 2, 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v3i2.96

Abstract

The intensive fishing of Fringescale sardinella the waters around Makassar has led to suspicions of a decline in catchable size. This study aims to analyze the size at first gonad maturity as a basis for determining catchable size. The research was conducted from October to December 2025 at the Beba Fish Landing Ground, Takalar Regency, using a quantitative approach through a survey method to obtain biological data. The results showed that the total length of the Fringescale sardinella caught ranged from 10 to 14.5 cm (12.029 ± 0.926 cm). Analysis of gonad maturity showed that the size at first gonad maturity (Lm) for female Fringescale sardinella was 12.66 cm, while for males it was 13.02 cm. The combined average Lm was 12.89 cm. Meanwhile, the average size of fish caught during the study reached 12.09 cm, lower than the overall gonad maturity size of 13.02 cm. The comparison between catch size and gonad maturity size indicates that most fish caught were below reproductive size. This condition indicates that the majority of individuals in the population were not optimally contributing to the natural spawning process when caught. Catching mackerel at this size cannot be categorized as suitable for fishing and has the potential to disrupt stock sustainability. These results emphasize the importance of setting minimum catch sizes and monitoring exploitation intensity to maintain population balance and support sustainable fisheries management
Akumulasi Logam Berat Merkuri pada Ikan Tembang (Sardinella fimbriata Valenciennes, 1847) Ditinjau dari Kebiasaan Makan di Perairan Selat Makassar Kantun, Wayan; Husna, Asmaul
Jurnal Riset Diwa Bahari (JRDB) Volume 3, Nomor 2, 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v3i2.97

Abstract

The Fringe scale sardinella is a small pelagic fish that plays a strategic role in capture fisheries in the Makassar Strait. Information on the relationship between dietary habits and the accumulation of the heavy metal mercury (Hg) in various fish sizes is still relatively limited. Mercury is known as a heavy metal that is toxic, persistent, and capable of biomagnification in the food chain, thus potentially posing a risk to human health. This study aims to analyze the relationship between dietary habits and body size of Fringe scale sardinella and mercury content in fish muscle tissue. The study was conducted using a descriptive analytical method with a survey approach. Fringe scale sardinella samples were grouped into three size classes: small, medium, and large. Dietary habits were analyzed through identification of stomach contents, while mercury content was analyzed in muscle tissue using the SNI: 2354.6.2016 method. The results of the study showed a shift in the feeding habits of Fringe scale sardinella as their size increased, from the dominance of phytoplankton and micro zooplankton at small sizes to larger zooplankton at medium and large sizes, which was followed by variations in mercury content between fish sizes. The lowest mercury content was found in small fish (0.2676 ± 0.008 mg/kg), increased in medium-sized fish (0.3536 ± 0.010 mg/kg) as the maximum accumulation phase, and decreased again in large fish (0.2996 ± 0.004 mg/kg), which indicates the role of growth dilution effects and physiological mechanisms of fish in controlling mercury accumulation. The feeding habits and body size of Fringe scale sardinella closely related to mercury accumulation patterns, thus becoming an important aspect in assessing the risk of mercury contamination in fish resources in the Makassar Strait waters
Status Stok dan Pengelolaan Berkelanjutan Ikan Selar (Selar boops Cuvier, 1833.) di WPPRI 713 Berdasarkan Analisis Surplus Produksi Kantun, Wayan; Hernita, Hernita
Jurnal Riset Diwa Bahari (JRDB) Volume 3, Nomor 2, 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v3i2.98

Abstract

Fundamental problems in managing oxeye scad fisheries in WPPRI 713 include limited comprehensive stock data, resulting in suboptimal resource utilization and potential unsustainability. This study aims to estimate the sustainable potential, utilization rate, optimum effort, and allowable catch as the basis for sustainable oxeye scad fisheries management. This study uses a quantitative approach based on statistical data for ten years (2015–2024), analyzed using the Schaefer surplus production model. The results indicate that the sustainable potential of oxeye scad reaches 63,404,117 tons/year, the utilization rate is 18.99%, the optimum effort is 3,730,925 units, and the allowable catch is 50,723 tons/year. These results confirm that oxeye scad stocks are in a productive condition and opportunities for utilization development are still wide open, but still require management control through regulation of fishing effort and the implementation of quotas based on the allowable catch. In conclusion, oxeye scad fisheries in WPPRI 713 can still be developed safely while adhering to established biological limits
Efek Sinergis Madu dan Air Kelapa terhadap Maskulinisasi, Daya Tetas, dan Tingkat Kelangsungan Hidup Larva Ikan Nila (Oreochromis niloticus) Azis, Irwan; Cahyono, Indra
Jurnal Riset Diwa Bahari (JRDB) Volume 3, Nomor 2, 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat (LPPM) Institut Teknologi dan Bisnis Maritim Balik Diwa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63249/jrdb.v3i2.81

Abstract

This study investigates the synergistic effects of honey and coconut water as natural masculinization agents on Nile tilapia (Oreochromis niloticus) larvae. The experiment evaluated the impact of these natural substances on sex ratio, hatchability, growth performance, and survival rate. A total of four treatments were tested: honey (15 ml/L), coconut water (30%), a combination of both, and a control group. Results showed that the combination of honey and coconut water yielded the highest masculinization ratio (94%), significantly higher than the control group (53%). Additionally, the combination treatment also exhibited superior hatchability (77.5%) and growth performance compared to the other treatments. Survival rates were highest in the combination group (94.67%), followed by coconut water (88.67%), honey (87.33%), and control (73.67%). This study provides promising evidence that honey and coconut water can be used as sustainable, eco-friendly alternatives to synthetic hormones in tilapia aquaculture.

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