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Authentic Research of Global Fisheries Application Journal (Aurelia Journal)
Published by Politeknik Kelautan dan Perikanan Dumai
ISSN : -     EISSN : 27157113     DOI : -
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Aurelia menerbitkan beberapa artikel dari hasil penelitian asli dan inovatif untuk memberikan pengetahuan dan penelitian terbaru kepada para pembaca tentang ilmu dan teknologi perikanan dan kelautan serta pengembangan pengelolaannya. Scope: Teknologi Perikanan Laut, Agribisnis Perikanan, Manajemen dan Teknologi Budidaya Perairan, Teknologi Pengolahan Hasil Laut, Pengelolaan Sumberdaya Perairan, Kearifan Lokal Masyarakat Pesisir, Teknologi Mekanisasi Perikanan, Kebijakan Kelautan dan Perikanan
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Articles 12 Documents
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Search results for , issue "Vol 7, No 1 (2025): April" : 12 Documents clear
ANALYSIS OF ALUMINUM SAND CASTING OF A THREE-BLADED PROPELLER FOR FISHING BOATS WITH A DIRECT GATING SYSTEM Umar, Mega Lazuardi; Hanafi, Agung Fauzi
Aurelia Journal Vol 7, No 1 (2025): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i1.15647

Abstract

This research aims to simulate and verify the aluminum material casting process using the sand casting method with a top gating system for traditional fishing boats. Numerical simulations were conducted to predict molten metal flow, solidification, and potential casting defects, specifically shrinkage porosity. Using the simulation method, the shrinkage porosity area was observed at the central point of the propeller shaft and alsoat the tips of the propeller blades. Consistent results were also verified by experiments. To improve the casting results, direct gating casting recommendations are presented but still show shrinkage porosity in the riser, shaft, and propeller blade tips. However, when compared to the results before the improvement, a reduction in shrinkage defects is evident. This research is expected to provide a better understanding of the optimization of gating system design in propeller casting using the sand casting method, thereby improving product quality and reducing the potential for defects in propellers used for traditional fishing boats.
OPTIMIZING THE SUBSTITUTION LEVEL OF Lemna perpusilla IN COMMERCIAL FEED TO ENHANCE GROWTH AND FEED EFFICIENCY OF COMMON CARP (Cyprinus carpio) FINGERLINGS Sinaga, Daniel; Matondang, Muhaini
Aurelia Journal Vol 7, No 1 (2025): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i1.14022

Abstract

Feed production costs constitute the largest expense incurred by fish farmers. Common carp (Cyprinus carpio) is highly favored by consumers due to its delicious taste and affordable price. Rearing common carp fingerlings requires high costs, particularly for feed provision. Feed supplements are needed to enhance feed quality, digestibility, and growth efficiency to reduce feed expenses. One potential feed ingredient derived from aquatic plants that can be used as a supplementary feed is Lemna perpusilla, which has high protein content and effectively improves feed quality for several freshwater fish species. This study used common carp fingerlings measuring 3–5 cm and was conducted from June to July 2023 at UPR Amphibi Batang Toru. A Completely Randomized Design (CRD) was applied with five treatments and three replications, using Lemna perpusilla supplementation at 0% (control), 10%, 20%, 30%, and 40%. The final results concluded that the most optimal and efficient Lemna perpusilla supplementation in feed was 40%, which significantly influenced the growth of common carp.
GROWTH PERFORMANCE AND SURVIVAL RATE OF SAND LOBSTER (Panulirus homarus sp.) IN AN INDOOR SYSTEM Khaerudin, Khaerudin; Indrayati, Artin; Aulia, Deni; Sabariyah, Nunung; Umidayati, Umidayati
Aurelia Journal Vol 7, No 1 (2025): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i1.15064

Abstract

Sand lobster (Panulirus homarus sp.) is one of the promising fishery commodities with high economic value and is considered a leading export species in Indonesia's fisheries sector. The cultivation of sand lobster using floating net cages (KJA) in the sea still faces many challenges. Therefore, innovative cultivation technologies for lobsters are urgently needed. This study aims to assess the growth performance and survival rate of sand lobsters cultivated in a closed system (indoor system). The research was conducted using four fiberglass tanks measuring 4 x 2 x 1 m (water height 0.5 m). The average initial body weight (IBW) of the lobster seed used was 79.8 ± 5.8 (mean ± SE) with a stocking density of 10 individuals/m². The feed provided consisted of trash fish and golden apple snails, with a feeding rate of 15% of the total biomass. Growth sampling was conducted every three weeks. Sand lobsters cultivated for nine weeks (63 days) had an average final body weight (FBW) of 91.1 ± 5.2 grams/individual. The weight gain (WG) and specific growth rate (SGR) of the sand lobsters during the study were 14.2 ± 1.5% and 0.22 ± 0.02%, respectively. The feed conversion ratio (FCR) during the study was 10.1 ± 0.1, while the average daily growth (ADG) was 0.19 ± 0.01 grams/day. The survival rate (SR) of the sand lobsters decreased over the maintenance period, reaching 75.6 ± 2.8% by the end of the study. 
THE GROWTH PERFORMANCE OF WHITE SNAPPER (Lates calcarifer) FINGERLINGS IN ODE AQUACULTURE AND AGRICULTURE HATCHERY UNIT, BRUNEI-MUARA BRUNEI DARUSSALAM DISTRICT Ritonga, Lusiana BR; Harijono, Teguh; Asmarany, Anja; Widodo, Agus; Aonullah, Asep Akmal; Akbar, M.Baihaqi; Affisramyraj, Rizky
Aurelia Journal Vol 7, No 1 (2025): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i1.14754

Abstract

White snapper (Lates calcarifer) is a high value aquaculture commodity with increasing market demand. This study aimed to analyzed the growth performance of white snapper fry during the nursery phase at the ODE Aquaculture and Agriculture Hatchery Unit, Brunei-Muara District, Brunei Darussalam, from March to June 2023.The nursery utilized controlled fiberglass tanks equipped with aeration and a flow-through water system. Two types of tanks were used: rectangular tanks measuring 4 × 1.5 × 1 m (capacity: 6,000 L) and circular tanks with a diameter of 2 m (capacity: 3,140 L). A total of 100,000 fry were stocked, with 30,000–40,000 fry per tank. Observed parameters included survival rate (SR), absolute length growth rate, absolute weight growth rate, specific growth rate (SGR), and feed conversion ratio (FCR). Water quality parameters measured were temperature, salinity, and pH. Results indicated an absolute length growth rate of 1.2 cm/week, surpassing previous studies reporting only 0.4 cm/week. The absolute weight growth rate was 1.3 g/week, exceeding the 0.6–1 g/week range reported in other research. The FCR was 0.33, demonstrating excellent feed efficiency. However, the survival rate was 30.77%, below the standard for controlled nursery systems (>50%), likely due to high stocking density and cannibalism. Harvest size ranged from 8 to 9 cm. Water quality remained stable, with temperatures between 31–32.5°C, pH levels from 7.6–8.3, and salinity ranging from 30–32 ppt. Despite the low survival rate attributed to high stocking density, the nursery phase at this facility achieved commendable growth rates compared to previous studies. This success is supported by stable water quality and the provision of high-protein feed.
THE ECONOMIC IMPACT OF SAND MINING ON COASTAL COMMUNITIES IN PANTAI HARAPAN VILLAGE, LINGGA REGENCY Fauzy, Fauzy; Hafsar, Khairul; Tetty, Tetty
Aurelia Journal Vol 7, No 1 (2025): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i1.15768

Abstract

Sand mining activities can absorb labor and also be a source of pollution that causes damage in the form of mud and turbidity. Since its establishment in 2019 to 2024, there has been no clarity regarding the mining permits carried out. Sand mining activities involve taking river sand and causing environmental impacts that result in river water pollution around the mine and even into the sea. The purpose of the study was to calculate the income of coastal communities before and after sand mining, calculate the percentage change in income of coastal communities due to sand mining and calculate the percentage of labor absorption created from sand mining activities in Pantai Harapan Village, Lingga Regency. The research was conducted in March-April 2024 in Pantai Harapan Village, Selayar District using a quantitative descriptive method. The number of samples in the study was 42 respondents. The research uses income analysis, percentage changes in income and labor absorption with existing formulas using Microsoft Excel software. The results of the study showed that the average change in community income before mining was IDR 24,517,452/year, after mining it was IDR 37,297,230/year. The percentage change in income of the people of Pantai Harapan Village after mining is 20%. The absorption of labor due to sand mining is 4%.
UTILIZATION OF MARICULTURE FISHERY RESOURCES IN AMBON BAY THROUGH GOVERNMENT POLICIES AND YOUTH INVOLVEMENT Lekirupy, Ongen Rumaryo; Rahayu, Sri Panca
Aurelia Journal Vol 7, No 1 (2025): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i1.15338

Abstract

The utilization of mariculture fisheries resources in Ambon Bay faces several challenges, including technological limitations, limited market access, and suboptimal government policies. The Ambon City Government and the Maluku Provincial Government have designated this area for marine aquaculture development. Youth involvement is a crucial aspect, as young people serve as partners in the implementation of government policies. This study aims to identify the forms of youth involvement, government policies, and the utilization practices of mariculture fisheries resources in Ambon Bay. Data collection was conducted through interviews with 51 respondents. The identified forms of mariculture fisheries resource utilization include seaweed farming and fish cultivation using floating net cage systems. Youth involvement was categorized as follows: 5.9% as business owners, 68.6% as members of business groups, and 25.5% as laborers. Government policy interventions in the area include the provision of assistance or grants in the form of fish seed, feed, supporting facilities, and training by the Ministry of Marine Affairs and Fisheries, the Maluku Provincial Government, the Ambon City Government, as well as village and sub-district governments. These entities consistently provide support in the form of production facilities for fish farming using floating net cage systems. Government policies on youth empowerment need to be implemented comprehensively, beginning with the preparation of human resources (youth), the development of adequate competencies and skills, and the provision of accessible business capital. These efforts aim to encourage greater youth involvement in the utilization of mariculture fisheries resources in Ambon Bay.
BIOECOLOGY OF LOKAN CALM (Geloina erosa) IN THE MANGROVE ECOSYSTEM OF BURUK BAKUL VILLAGE, BUKIT BATU DISTRICT, BENGKALIS REGENCY, RIAU PROVINCE Purba, Marantha Merari; Fajri, Nur El; Yuliati, Yuliati
Aurelia Journal Vol 7, No 1 (2025): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i1.14329

Abstract

Mangrove ecosystems are characterized by the high diversity of associated biota found, such as sea scallops. Sea scallops are filter feeders and suspension feeders that live at the bottom of the waters by burying themselves in sediment. This study aims to determine the biological aspects of sea scallops (morphometrics, density, distribution, and growth) and ecological aspects (mangrove vegetation structure and knowing the condition of sediment fractions and organic matter) in Buruk Bakul Village, Bukit Batu District, Bengkalis Regency, Riau Province. Sampling was carried out on transects containing 9 plots measuring 1 x 1 m² with a depth of 30 cm and a distance between transects of 100 m. Sampling and observation were carried out 3 times with an interval of 2 weeks. The results showed that the morphometric size of sea scallops varied. The density value of lokan clams ranges from 150 ind/ha to 2,700 ind/ha, with the highest lokan density at station I, natural mangrove forest conditions, and no community activities. The distribution pattern of lokan clams is categorized as uniform with an average value of <1. The growth pattern of lokan clams shows a negative allometric pattern, namely b <3. The highest density of mangrove vegetation is at station I, with 1,522 trees/ha, in a good category. The highest sediment fraction is the mud fraction, ranging from 30.24% to 84.6%. The highest organic matter content is at station I with a value of 28.37%. The results of the study showed that the density, growth, and morphometrics of lokan clams in Buruk Bakul Village were significantly influenced by the ecological conditions of the mangrove forest, especially the density of mangrove vegetation, substrate composition, and concentration of organic matter in the sediment.
TEMPORAL ANALYSIS OF THE PRODUCTIVITY OF THE DOMINANT CAPTURE FISHERIES COMMODITY (CASE IN THE SOUTHERN WATERS OF THE SPECIAL REGION OF YOGYAKARTA – WPP NRI 573) Prakoso, Bagas; Suyasa, I Nyoman; Rahayu, Siti Mira
Aurelia Journal Vol 7, No 1 (2025): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i1.15246

Abstract

Climate variations can affect sea surface temperature (SST), feed distribution, and fish habitat. Temporal analysis of SPL and chlorophyll-a can help identify the impact of climate change on capture fisheries productivity. This study aims to analyze the relationship between chlorophyll-a and sea surface temperature (SST) on the productivity of dominant capture fishery commodities in the southern waters of the Special Region of Yogyakarta I-FMA 573. Fisheries productivity data on five dominant fish species at the research site (yellowfin tuna (Thunnus albacares), skipjack tuna (Katsuwonus pelamis), savalai hairtail (Trichiurus savala), Indian scad (Decapterus russelli), and common dolphinfish (Coryphaena hippurus)) in 2014-2023 were collected from PPP Sadeng. Chlorophyll-a and SST data for 2014-2023 were obtained from Aqua Modis multisensory satellite imagery. The data was classified based on the four seasons in Indonesia allowing analysis of seasonal changes affecting fisheries productivity. Skipjack tuna has the highest productivity, with an average of 410,803 kg/trip, while common dolphinfish has the lowest productivity, with an average of 29,521 kg/trip. Based on the results of multiple linear regression, chlorophyll-a and SST had a significant effect on the productivity of yellowfin tuna, skipjack tuna, Indian scad, and common dolphinfish, so that chlorophyll-a and SST may indicate the presence of these fish populations. Meanwhile, savalai hairtail are not significantly affected by chlorophyll-a and SST, because many environmental factors affect including monsoon winds, currents, and rainfall.
ANALYSIS OF THE CARACTERISTICS OF PLASTIC OIL FOR FISHING TOOLS MADE FROM POLYETHELIENE (PE) AND POLYAMID (PA) Marsono, Marsono; Wijatmika, Wijatmika; Mustono, Eddy
Aurelia Journal Vol 7, No 1 (2025): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i1.15024

Abstract

The caracteristic of plastic oil include density, viscosity and heating value Plastic waste can be used as raw material for plastic oil by usingpyrolysis process. The resulting plastic oil can be used as an additive or mixturefuel in the engine. In this research, the process of making plastic oil was used twicepyrolysis process. The reactor temperatures in the first and second pyrolysis processes are different respectivelynamely 200 oC and 150 oC. From the results of this research it is known that in the first pyrolysis processwith a reactor temperature of 200 oC, from 25 kg of raw material produces 15.5 liters of plastic oil intime 8 hours. Meanwhile, in the second pyrolysis process with a reactor temperature of 150 oC, from 15 liters of oilThe plastic from the first pyrolysis process produces 11.6 liters of plastic oil in 3.33 minutesO'clock. The characteristics of the plastic oil produced are a density of 771.4 kg/m3, Viscosity0.501 m2/s and calorific value 10518 kJ/kg.
ASSESSMENT OF VOLTAGE AND CURRENT IMBALANCE ON PURSE SEINE FISHING VESSELS OPERATING IN THE NATUNA SEA: A COMPARATIVE STUDY BASED ON IEEE STD 45-2002 Demeianto, Bobby; Siahaan, Juniawan Preston; Abrori, M. Zaki L; Tumpu, Mula; Fadiga, Aqshal Ilham; Mahendra, Taufan; Nasution, Akhyar; Pane, Mhd Riswan
Aurelia Journal Vol 7, No 1 (2025): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/aj.v7i1.15628

Abstract

Although numerous studies have been conducted on voltage and current imbalance in electrical systems, research specifically focusing on these conditions in fishing vessels, particularly those operating in the Natuna Sea, remains very limited. This study aims to analyze the voltage and current imbalance on the generators of purse seine fishing vessels operating in the Natuna Sea, based on the IEEE Std 45-2002 and BKI Volume IV Year 2022 standards. A quantitative approach was employed, involving direct measurements of voltage (both line-to-line and phase-to-neutral) and current at the main distribution panels of five fishing vessels. The reference standard for Line Voltage Unbalance Tolerance (%LVUT) according to IEEE Std 45-2002 is ≤ 3%, while the acceptable limit for current imbalance according to BKI Volume IV Year 2022 is ≤ 15%. The results showed that the average voltage imbalance across the five vessels was below the IEEE tolerance limit (≤ 3%), with the highest recorded value being 4.34% on KM. Palembang Indah II. Meanwhile, current imbalance generally complied with the BKI limit (≤ 15%), except for KM. Rezeki Bersama, which exhibited the highest current imbalance at 30.48%. These findings highlight the need for mitigation measures, such as load redistribution and phase balancing, particularly on vessels with significant imbalance levels. This study provides practical contributions to improving the reliability of vessel electrical systems and enhancing operational safety within Indonesia’s marine fisheries sector. 

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