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Contact Name
Abd. Kakhar Umar
Contact Email
abd.kakhar@etflin.com
Phone
+62 82216335184
Journal Mail Official
aqlis@etflin.com
Editorial Address
ETFLIN Office Baliase Blok P No. 21, Marawola, Kabupaten Sigi 94222, Indonesia.
Location
Kota palu,
Sulawesi tengah
INDONESIA
Aquatic Life Sciences
Published by ETFLIN
ISSN : -     EISSN : 30635543     DOI : https://doi.org/10.58920/aqlis
Aquatic Life Sciences is an open-access journal published by ETFLIN and dedicated to advancing research on aquatic life, encompassing various fields such as aquatic biotechnology, natural products from bioresources, and the impact of environmental stressors on ecosystems. The journal is affiliated with the Faculty of Fisheries and Marine Sciences, Mulawarman University. Aquatic Life Science aims to provide a platform for researchers, academics, and professionals to publish original research, reviews, and perspectives on all aspects of aquatic life. The journal seeks to promote interdisciplinary research that addresses aquatic organisms chemical, biological, ecological, physiological, and behavioral aspects and their interactions with the environment and other species. The Aqlis scope is related to these following topics but are not limited to: Aquatic biotechnology: research on the development and application of biotechnological approaches to marine and freshwater organisms, including the production of novel biomolecules, genetic engineering, and bioprospecting. Natural products from aquatic bioresources: studies on the identification and characterization of natural compounds with potential pharmaceutical, industrial, or agricultural applications, sourced from marine and freshwater organisms. Aquatic environment: research on the impacts of environmental stressors on aquatic ecosystems, including climate change, pollution, and habitat degradation, as well as the development of strategies for conservation and management. Aquaculture: studies on the cultivation and breeding of aquatic organisms for food, ornamental purposes, and other applications, including the development of sustainable aquaculture practices. • Biotechnology in seafood: studies on biotechnological tools and methods to improve the quality, safety, and sustainability of seafood production, including genetic engineering, bioprocessing, microbial ecology, food science, and food safety.
Articles 4 Documents
Search results for , issue "Volume 2 Issue 2" : 4 Documents clear
Water Quality Analysis of the Sengkaring River for Fish Farming Feasibility in Pekalongan Regency Afidah, Fini; Jailani, Abdul Qadir; Aji, Muhammad Tri
Aquatic Life Sciences Volume 2 Issue 2
Publisher : ETFLIN Publishing House

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Abstract

Rivers serve as essential water sources for freshwater aquaculture, and their quality must meet physical, chemical, and biological standards to ensure environmental sustainability. This study aimed to assess the water quality of the Sengkarang River in Pekalongan Regency, Central Java, Indonesia, determine its suitability for freshwater aquaculture, and identify fish species appropriate for cultivation. The research was conducted from October to November 2021 during the transitional period from dry to rainy season at three sampling sites representing the upstream (Legokalong Village), midstream (Karanganyar Village), and downstream (Karangsari Village) zones. Water samples were collected using purposive sampling and analyzed by the Environmental Agency of Pekalongan City through laboratory testing, descriptive statistics, and a scoring-based suitability assessment. The results showed that temperature (25.3–26.1°C), brightness (38–54 cm), dissolved oxygen (5.2–5.7 mg/L), pH (7.0–7.3), BOD (0.19–1.05 mg/L), COD (20.65–35.92 mg/L), and nitrite (0.026–0.041 mg/L) met the Class III water quality standards based on Government Regulation No. 22 of 2021. Plankton abundance ranged from 47,410 to 75,000 ind/L, indicating fertile and productive waters. With an overall suitability score of 86 (highly suitable category), the Sengkarang River is considered feasible for the cultivation of Nile tilapia (Oreochromis niloticus), catfish (Clarias sp.), and gourami (Osphronemus goramy). These findings highlight the strong potential of the Sengkarang River for sustainable aquaculture development and emphasize the importance of regular environmental monitoring to maintain water quality and ecological balance.
Characteristics of Crude Pepsin Enzyme from Catfish Stomach (Clarias sp.) Fatiranes, Erlando; Sidauruk, Santhy Wisuda; Hasan, Bustari
Aquatic Life Sciences Volume 2 Issue 2
Publisher : ETFLIN Publishing House

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Abstract

Fish stomach is a by-product of the fishing industry that has potential as a natural source of pepsin enzyme, particularly from catfish (Clarias sp.). This study aimed to characterize crude pepsin extracted from catfish stomachs. The extraction was carried out by homogenizing the stomach with 10 mM Tris-HCl buffer (pH 7.5), followed by centrifugation at 10,000 g for 15 min at 4°C. The obtained pepsinogen was activated using 3 N HCl at pH 2 and neutralized to pH 2.75 with 2 N NaHCO₃. Enzyme activity was determined using the hemoglobin assay at 280 nm, and protein concentration was measured by the Bradford method at 595 nm. The crude pepsin showed an activity of 33.50 ± 0.87 U/mL, protein concentration of 0.358 ± 0.005 mg/mL, total activity of 1,608 ± 41.57 U, and specific activity of 93.52 U/mg. The enzyme exhibited optimal activity at 50°C and pH 4, with relative activity toward NaCl, ZnCl₂, and FeCl₃ of 81.08%, 49.10%, and 128.15%, respectively, indicating Fe³⁺ acted as an activator. These results demonstrate that catfish stomachs can serve as a potential halal-compatible pepsin source, supporting enzymology advancement and fish waste valorization.
Physicocemical and Microbiologycal Characterization of Hydroxyapatite Based Toothpaste From Freshwater Mussel (Pilsbryoconcha exilis) Shell Octavia, Stephanie; Sidauruk, Santhy Wisuda; Sari, Noor Ira
Aquatic Life Sciences Volume 2 Issue 2
Publisher : ETFLIN Publishing House

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Abstract

Utilizing freshwater mussel shell waste as a sustainable source of calcium-based biomaterials represents an eco-friendly approach to producing hydroxyapatite for oral care applications. Hydroxyapatite acts as an active component in toothpaste formulations, functioning as an abrasive and inhibiting bacterial growth responsible for dental plaque. This study aimed to evaluate the effect of adding hydroxyapatite to toothpaste on its physicochemical and microbiological characteristics and to determine the best formulation of freshwater mussel shell–based hydroxyapatite toothpaste. The research included hydroxyapatite synthesis, toothpaste production, and evaluation of physicochemical and microbiological properties. An experimental method using a completely randomized design was employed, consisting of four treatments: TH35 (35% hydroxyapatite), TH45 (45% hydroxyapatite), TH55 (55% hydroxyapatite), and TK (commercial toothpaste). The results showed that the addition of hydroxyapatite significantly affected the physicochemical characteristics (color, aroma, texture, homogeneity, spreadability, pH, and foam height) and microbiological activity (inhibition zone against Staphylococcus aureus) at a 95% confidence level (p < 0.001). The best formulation, based on pH, calcium content, and bacterial inhibition zone, was obtained with 55% hydroxyapatite, having a pH of 7.39, calcium content of 15.97%, and an inhibition zone of 22.24 mm against Staphylococcus aureus. These findings demonstrate that mussel shell–derived hydroxyapatite can serve as a sustainable and functional ingredient in toothpaste formulations with enhanced antibacterial and physicochemical performance.
Assessment of Water Quality Parameters in Penaeus monodon Culture Ponds: Implications for Sustainable Shrimp Aquaculture Tulus, Muh Yusril AL; Maulianawati, Diana
Aquatic Life Sciences Volume 2 Issue 2
Publisher : ETFLIN Publishing House

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Abstract

Shrimp aquaculture depends on stable water quality, but fluctuations often reduce growth and survival, making optimal conditions essential for sustainable Penaeus monodon culture. This study aimed to evaluate key water quality parameters in two shrimp ponds and assess their suitability against established aquaculture standards. Field measurements and laboratory analyses were conducted over ten weeks across three sampling stations in each pond. Parameters measured included pH, temperature, salinity, dissolved oxygen (DO), nitrate, nitrite, ammonia, phosphate, and water hardness. Results showed that pH ranged from 7.29–7.80, temperature from 31.40–32.00 °C, salinity from 17.30–17.88 ppt, and DO from 5.29–5.87 mg/L, all within acceptable limits (SNI 8038.1:2014). Nutrient concentrations varied, with nitrate (0–0.4 mg/L), nitrite (0–0.4 mg/L), ammonia (0.1–0.4 mg/L), and phosphate (0–0.5 mg/L), where ammonia occasionally exceeded the safe threshold of 0.1 mg/L. Water hardness ranged from 0.17–0.43 mg/L CaCO₃, below the reference limit of 100 mg/L CaCO₃. Overall, the ponds provided suitable conditions for shrimp growth, but elevated nutrient levels at certain periods indicate the need for improved feed and waste management. Maintaining balanced water quality is essential to optimizing shrimp health, enhancing productivity, and ensuring the sustainability of aquaculture practices.

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