Aquatic Life Sciences Archives (Volume 2 Issue 1)

Kevin Andreas Sihombing, Bustari Hasan, Santhy Wisuda Sidauruk. Potential of Chitosan from Mangrove Snail Shells (Telescopium sp.) in Body Scrub Formulation. Aquatic Life Sciences. 2025; 2(1):21-27.

Abstract: Mangrove snails (Telescopium sp.) are a potential source of chitin-rich shells, which can be converted into chitosan with antimicrobial, humectant, and natural thickening properties suitable for cosmetic applications. This study aimed to evaluate the effect of varying chitosan concentrations on the Show more...

Abstract: Mangrove snails (Telescopium sp.) are a potential source of chitin-rich shells, which can be converted into chitosan with antimicrobial, humectant, and natural thickening properties suitable for cosmetic applications. This study aimed to evaluate the effect of varying chitosan concentrations on the quality and shelf life of body scrubs and to identify the optimal concentration for formulation. An experimental approach was employed, assessing chitosan characteristics (yield, moisture content, ash content, nitrogen content, and degree of deacetylation) and product quality parameters (homogeneity, humectant capacity, viscosity, adhesiveness, spreadability, pH, total bacterial count, and total fungal count) over a 30-day storage period. Chitosan derived from mangrove snail shells showed a yield of 9.91%, with 6.10% moisture, 6.34% ash, 6.57% nitrogen, and 67% degree of deacetylation. The 2% chitosan formulation yielded the best results, with favorable humectant capacity (94.75%), viscosity (3746.05 cps), adhesiveness (6.12 s), spreadability (6.52 cm), pH (6.38), and low microbial counts (10³ CFU). Chitosan’s antimicrobial activity contributed to maintaining product quality and safety throughout the 30-day shelf life. Show less...

Marine-derived biopolymers Chitosan-based body scrub Eco-friendly exfoliating products Biopolymer extraction methods

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Nurul Mutiara Irwan, Sharifuddin Bin Andi Omar, Budiman Yunus. Sex Ratio and Gonadal Maturity of Marble Goby (Oxyeleotris marmorata) in Lake Tempe, Indonesia. Aquatic Life Sciences. 2025; 2(1):12-20.

Abstract: Understanding the sex ratio and initial gonadal maturity size of fish populations is essential for effective conservation and sustainable fishery management. This study aims to analyze the comparison of sex ratio and initial gonadal maturity size of marble goby (Oxyeleotris marmorata) in Lake Tempe, Show more...

Abstract: Understanding the sex ratio and initial gonadal maturity size of fish populations is essential for effective conservation and sustainable fishery management. This study aims to analyze the comparison of sex ratio and initial gonadal maturity size of marble goby (Oxyeleotris marmorata) in Lake Tempe, Wajo Regency, South Sulawesi. The research was conducted over two months, from October to November 2023, with four sampling events, two during the dark moon phase and two during the bright moon phase. A total of 285 individuals were collected, consisting of 118 females and 167 males, using jabba or bubu fishing gear. Sex identification and gonadal maturity determination were conducted at the Fisheries Biology Laboratory, Faculty of Marine and Fisheries Sciences, Universitas Hasanuddin. The results showed that the overall sex ratio was 0.71:1.00 (female:male), with significant male dominance during the dark moon phase and at Station 1 (near agricultural land). Gonadal maturity levels (TKG) ranged from stage I to stage V, with first gonadal maturity sizes varying between moon phases and locations. The smallest first gonadal maturity size was recorded at 175.72 mm for females (Station 1) and 191.65 mm for males (Station 1). These findings provide essential data for supporting sustainable fishery management in Lake Tempe. Show less...

Gonadal maturity level Moon phase impact Sustainable harvesting

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Serianto Simon, Diana Maulianawati. Study of Mineral Content in Pond Water for Traditional Farming of Black Tiger Shrimp (Penaeus monodon) in Tarakan City. Aquatic Life Sciences. 2025; 2(1):28-33.

Abstract: Although required only in trace amounts, minerals are vital for the cultivation of black tiger shrimp (Penaeus monodon). However, limited studies have explored the link between mineral availability and shrimp farming performance. This study aimed to identify the types and concentrations of minerals Show more...

Abstract: Although required only in trace amounts, minerals are vital for the cultivation of black tiger shrimp (Penaeus monodon). However, limited studies have explored the link between mineral availability and shrimp farming performance. This study aimed to identify the types and concentrations of minerals present in shrimp ponds located in two different areas of Tarakan City, North Kalimantan, namely West Tarakan and East Tarakan districts. An exploratory approach was employed, and samples were collected using purposive sampling techniques. The analysis revealed that concentrations of Magnesium (Mg), Calcium (Ca), and Iron (Fe) in both ponds met the quality standards suitable for shrimp farming. In Pond 1, Mg levels ranged from 1200 to 1245 mg/L, Ca from 438 to 480 mg/L, and Fe was below 0.02 mg/L. Similarly, in Pond 2, Mg levels ranged from 1200 to 1290 mg/L, Ca from 432 to 480 mg/L, and Fe remained below 0.02 mg/L. These values indicate that the presence of these minerals poses no toxicity risk to shrimp culture environments. Furthermore, water quality parameters such as temperature, salinity, pH, and dissolved oxygen were within the acceptable range for P. monodon cultivation. No significant correlation was found between water quality and mineral concentrations. Harvest results showed a yield of 90 kg (average size 35) with a 90% survival rate in Pond 1, from an initial stocking of 3,000 post-larvae. In contrast, no shrimp were harvested from Pond 2, and the absence of yield was attributed to suspected predation, as no disease outbreak or mass mortality was observed. These findings highlight the importance of stable mineral conditions in supporting successful shrimp farming, and suggest further investigation into non-water quality factors such as predation. Show less...

Coastal pond aquaculture Trace minerals in shrimp farming Environmental factors in aquaculture Role of magnesium and calcium in aquaculture Shrimp immune response to mineral levels

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Nuraisyah Nuraisyah, Riyanto Riyanto. Effectiveness of Freshwater Mussel (Pilsbryoconcha exilis) as a Biofilter Medium in Improving Water Quality. Aquatic Life Sciences. 2025; 2(1):34-39.

Abstract: This study aimed to evaluate the effectiveness of the freshwater mussel (Pilsbryoconcha exilis) as a natural biofilter in improving water quality in Dusun II, Bandar Klippa Village, Deli Serdang Regency. The research was conducted from August to October 2020 using a Completely Randomized Design (CRD Show more...

Abstract: This study aimed to evaluate the effectiveness of the freshwater mussel (Pilsbryoconcha exilis) as a natural biofilter in improving water quality in Dusun II, Bandar Klippa Village, Deli Serdang Regency. The research was conducted from August to October 2020 using a Completely Randomized Design (CRD) comprising four treatments based on biofiltration duration: 0 days (control), 5 days, 10 days, and 15 days, each with four replications. The observed parameters included physical characteristics (turbidity, odor, color, total dissolved solids/TDS) and chemical properties (pH, iron/Fe, manganese/Mn, nitrite/NO₂⁻, and nitrate/NO₃⁻). Statistical significance was tested using ANOVA followed by DMRT. The results indicated that P. exilis significantly reduced turbidity and eliminated odor within 5 days of treatment. The pH also significantly decreased, although it remained within the safe threshold for clean water. Conversely, Fe and Mn concentrations did not change significantly, while nitrite and nitrate levels increased, presumably due to enhanced nitrification during filtration. Overall, P. exilis demonstrated potential as an effective biofilter for improving water's physical and chemical quality, with a 5-day filtration period identified as the optimal duration. Show less...

Freshwater filtration using bivalves Natural methods for turbidity removal Filter-feeding mussels in water treatment Total dissolved solids

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Desta Hutagaol, Firmansyah Firmansyah. Sustainable Harvest of Large Pelagic Fish in the Western Sumatra Sea. Aquatic Life Sciences. 2025; 2(1):1-11.

Abstract: Large pelagic fish such as tuna, skipjack, and mackerel are key export commodities for fishers at Bungus Oceanic Fishing Port due to high demand and their importance in processed fish products. This study analyzed trends, sustainable potential, and utilization levels of these resources in the wester Show more...

Abstract: Large pelagic fish such as tuna, skipjack, and mackerel are key export commodities for fishers at Bungus Oceanic Fishing Port due to high demand and their importance in processed fish products. This study analyzed trends, sustainable potential, and utilization levels of these resources in the western Sumatra Sea. Research conducted from March 17 to April 1, 2023, used a descriptive quantitative survey and literature review, with catch and effort data from 2015 to 2022 processed using Microsoft Excel. Results showed increasing catch trends, with tuna, skipjack, and mackerel projected to reach 723,417 kg, 462,205 kg, and 706,592 kg by 2025, respectively. The Maximum Sustainable Yield (MSY) estimates were 532,728 kg/year for tuna, 1,047,319 kg/year for skipjack, and 10,445,616 kg/year for mackerel. On average, the utilization rate was 37%, with a fishing effort rate of 24%, both categorized as moderate. Although tuna catches exceeded the MSY in 2021 (109.55% utilization), average exploitation across species remained sustainable. These findings suggest current fishing practices have not yet surpassed ecological limits, providing room for controlled increases in fishing efforts to maximize yields while maintaining ecological balance. Show less...

Tuna Maximum sustainable yield Over catch

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