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Jurnal Natur Indonesia
Published by Universitas Riau
ISSN : 14109379     EISSN : 25030345     DOI : https://doi.org/10.31258/jnat
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Physics
Jurnal Natur Indonesia has been published since 1998, is a science journal that presents articles on research results, thoughts and views from researchers and experts in biosciences (basic science), including biology, physics, chemistry and mathematics. Jurnal Natur Indonesia involves reviewers who review each article according to their field of knowledge. The names and institutional origins of the Reviewers are listed on the normal two pages of each volume of publication. The journal is published twice a year, in April and October. In the field of biosciences (basic science) Biology, Physics, Chemistry, Mathematics.
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 10 Documents
 1 
Search results for , issue "Vol. 23 No. 2 (2025): October" : 10 Documents clear
The Effect of Developmental Stages on the Photosynthetic Parameters of the Melon Nifi, Agayev Faxraddin; İlham, Allahverdiyev Elmar; Hajı, Mammadova Khurshid; Agil, Yolchueva Emina
Jurnal Natur Indonesia Vol. 23 No. 2 (2025): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.2.68-73

Abstract

This study explores the fluctuations in key photosynthetic parameters in two high-potential melon (Cucumis melo L.) cultivars—Gunash and Sadaf—grown in open-field conditions in the Absheron region. The research analyzes a range of physiological and biochemical traits, such as leaf area, photosynthetic potential (PP), net photosynthetic productivity (NPP), specific leaf surface density (SLSD), concentrations of plastid pigments, the coefficient of economic photosynthetic efficiency (CEEP), overall economic efficiency (CEE), and the accumulation of both fresh and dry biomass. Results show a steady rise in SLSD and biomass (both crude and dry) from the vegetative phase to fruit development and full ripening. The early-ripening Gunash cultivar displayed the highest gains during early fruit formation, while the mid-ripening Sadaf cultivar reached peak values during full ripening. Significant differences in NPP, SLSD, and CEE were found throughout the plant's life cycle, with peak values observed at the mass ripening stage in both varieties. Additionally, levels of chlorophyll and carotenoids in the leaves showed a three-phase peak pattern, with each phase varying by cultivar
Analysis of Watermelon (Citrullus vulgaris Schard.) Farming Business in Amara Jaya Farmer Group in Binawidya District, Pekanbaru City Khaswarina, Shorea; Kusumawaty, Yeni; Sihombing, Andre Saputra Hasiholan
Jurnal Natur Indonesia Vol. 23 No. 2 (2025): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.2.74-78

Abstract

This study analyses watermelon farming in the Amara Jaya Farmer Group in Binawidya District, Pekanbaru City, focusing on farmer characteristics, conformity of cultivation techniques with Good Agricultural Practices (GAP), as well as analysis of costs, revenues, and farming efficiency. Watermelon is a horticultural commodity that has the potential to increase income, but management efficiency is very important. This analytical descriptive research used a case study approach with in-depth interviews with five farmers and secondary data. Results showed an average total production cost of IDR 244,646,434 per hectare per growing season, with an average total revenue of IDR 119,833,333.40 per hectare. The average net income was IDR 125,296,100.00 per growing season. The R/C ratio of 0.184 indicates that the watermelon farm has not broken even and is still losing money, despite the gross profit margin per kilogram
Analysis of Business Costs of Western Honey Bee (Apis mellifera) in Teluk Rimba Village, Koto Gasib District, Siak Regency Suhada, Nur; Sribudiani, Evi; Isma, Olla; Mohta, Gandhiko; Darlis, Viny Volcherina; Lestari, Ika
Jurnal Natur Indonesia Vol. 23 No. 2 (2025): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.2.126-135

Abstract

In Teluk Rimba Village, Koto Gasib Subdistrict, Siak Regency, there are honey bee (Apis mellifera) businesses. These consist of five owners: Depra Group and Abdullah Madu Riau, established in 2020, and Young Daffa Madu, Madu Munthe Family, and Tunas Mekar, established in 2024. The beehives are located in the Industrial Plantation Forest (HTI) area of PT. Arara Abadi, Minas-Rasau Kuning District. This study focuses on cost analysis and business feasibility. No previous research has provided information on the current condition, business overview, cultivation practices, or feasibility of the honey bee ventures. This research analyzes the production costs, revenues, income, and feasibility of the Apis mellifera honey bee business in Teluk Rimba Village, Koto Gasib Subdistrict, Siak Regency. This research uses a mixed-method approach combining both qualitative and quantitative methods. The data analysis includes descriptive analysis, cost analysis, revenue, income, and Revenue Cost Ratio (R/C ratio) analysis. The results show that the total production cost of the Apis mellifera honey bee business from January to December 2024 was IDR 492,393,331. The total revenue for the same period was IDR 1,055,775,000. The net income generated was IDR 563,381,669. The R/C ratio analysis for the five honey bee businesses, Young Daffa Madu, Madu Munthe Family, Tunas Mekar, Depra Group, and Abdullah Madu Riau, shows that the total revenue divided by total production cost yielded a value of 2.14. This indicates that the honey bee business is profitable and feasible for development, as the R/C ratio value exceeds 1
Modeling of Water Surface Elevation Using MIKE 21 Based on Rupat Strait Bathymetric Data Ahmad, Alianisa; Mubarak, Mubarak; Tanjung, Afrizal; Rifardi, Rifardi; Ilahi, Ilham
Jurnal Natur Indonesia Vol. 23 No. 2 (2025): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.2.79-84

Abstract

The Rupat Strait, a strategically crucial marine channel separating Sumatra Island from Rupat Island, exhibits complex hydrodynamic characteristics influenced by tidal propagation from the adjacent Malacca Strait. As a vital shipping corridor, the strait's navigational safety is fundamentally governed by its bathymetric profile and tidal regime. This study implements an integrated methodological framework combining in situ bathymetric surveys with MIKE 21 hydrodynamic modeling to assess morphological dynamics quantitatively. Systematic validation of model outputs against field measurements revealed significant spatial variations in seafloor topography, including pronounced shallowing (>6.6 m) and substantial deepening (≤17 m) at distinct locations. Concurrent analysis of tidal data demonstrated extreme water level fluctuations, ranging from -2.36 m during the lowest astronomical tides to +6.28 m during peak tidal surges. These geomorphological alterations appear correlated with anthropogenic pressures, particularly intensive shipping traffic and coastal zone modifications, suggesting a coupled natural-anthropogenic forcing mechanism governing the strait's evolving morphodynamics. The findings highlight the critical need for ongoing monitoring to ensure maritime safety and sustainable coastal management in this rapidly changing marine environment
Strategy for Developing Ecotourism in the Imbo Putui Customary Forest Petapahan, Tapung District, Kampar Regency, Riau Riani, Imelda; Sumiarsih, Eni; Syafii, Muhammad
Jurnal Natur Indonesia Vol. 23 No. 2 (2025): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.2.96-102

Abstract

Forests are important in human life because they have ecological, social, and economic functions. One way to utilise forest environmental services to preserve the environment and increase income is to manage them as ecotourism sites. One area with ecotourism potential that needs to be developed in Kampar Regency is the 251-hectare Imbo Putui Customary Forest. Despite its diverse potential, the development of Imbo Putui Customary Forest Ecotourism faces several challenges, such as human resources for management and tourism infrastructure facilities. The location of this study is the Imbo Putui Petapahan Customary Forest Ecotourism site. This study aims to analyse the existing ecological, social, and economic conditions of the Imbo Putui Customary Forest Ecotourism potential and formulate a development strategy for the Imbo Putui Petapahan Customary Forest Ecotourism. This study uses a mixed methods approach with a qualitative dominance. Primary data was collected directly from the field through interviews, questionnaires, and observations. The existing conditions were measured using purposive sampling and qualitative descriptive analysis. Meanwhile, the ecotourism development strategy was formulated using SWOT analysis. The analysis results show that the strategic position for implementing Imbo Putui Customary Forest Ecotourism is quadrant I, namely the S-O (Strengths-Opportunities) strategy. The strategies that can be applied are to develop integrated tourism packages based on attractions, activities, and digital promotion; utilise local wisdom and area zoning as ecotourism educational material; optimise forest legality to expand stakeholder cooperation and program support; and make tree diversity and flora and fauna protection the basis for educational tourism and research.
Impact of Climate on Soil Wind Erosion in Karabakh Plain Mammadova, Ulviyya
Jurnal Natur Indonesia Vol. 23 No. 2 (2025): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.2.103-107

Abstract

Soil wind erosion in the Karabakh Plain has become a critical environmental concern due to shifting climatic patterns and anthropogenic pressures. This study explores the influence of key climate variables, including wind intensity, rainfall, and temperature fluctuations, on soil erosion dynamics. The research identifies the most erosion-prone periods and regions by evaluating historical climate data and local soil properties. The analysis emphasizes the importance of vegetation cover, optimized land use, and adaptive practices in mitigating soil degradation. However, implementing these measures faces several obstacles, such as limited financial and technical resources, insufficient public awareness, and the intricate interaction between climate and soil systems. The study advocates for a multifaceted risk management approach integrating innovative agricultural techniques, active community participation, and supportive policy frameworks to enhance soil health and reduce erosion. The insights offered a foundation for developing targeted strategies to combat wind erosion and foster long-term environmental sustainability. Furthermore, the proposed measures are adaptable to similar challenges in other semi-arid areas, enabling a broader application of these solutions to enhance resilience against soil erosion.
The Effect of Liquid Organic Fertilizer Made from Catfish Waste on the Biomass of Lemna sp in the Maintenance Media of Kissing Gourami (Helostoma temminckii) on Peat Water Nurhadi, Mhd Ilham; Syafriadiman, Syafriadiman; Hasibuan, Saberina
Jurnal Natur Indonesia Vol. 23 No. 2 (2025): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.2.85-95

Abstract

Peat water is acidic and nutrient-poor, thus less supportive for aquatic organisms. Lemna sp. has potential as both a phytoremediator and natural feed, but its growth depends on nutrient availability. Catfish waste can be fermented into liquid organic fertilizer (POC), rich in nitrogen, phosphorus, and potassium. This study aimed to examine the effect and optimal dosage of catfish-waste POC on the biomass of Lemna sp in peat water used for rearing kissing gourami (Helostoma temminckii). The research was conducted for 30 days, from March to April 2025, at the Environmental Quality Laboratory of Aquaculture, Faculty of Fisheries and Marine, Universitas Riau. The experimental method used a Completely Randomized Design (CRD) with five treatments and three replications. The treatments were: P0 (control, without POC), P1 (1.75 mL/L), P2 (2.0 mL/L), P3 (2.25 mL/L), and P4 (2.5 mL/L). The best result was obtained in treatment P3 (2.25 mL/L), with water quality values of temperature 26–30.4℃, pH 3.8–7.2, dissolved oxygen 4.54–7.37 mg/L, nitrate 0.39–15.86 mg/L, phosphate 3.06–6.05 mg/L, and CO₂ 5.0–10.0 mg/L. This treatment also produced a biomass increase of Lemna sp. of 107.6 g and a specific growth rate of 5.05%.
Species Inventory of Epilithic Macroalgae in Padang Unoi Coastal Waters, Simeulue Island Wahyuni, Sri; Mursawal, Asri; Usiani, Lulu; Kurniawan, Ronal
Jurnal Natur Indonesia Vol. 23 No. 2 (2025): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.2.108-115

Abstract

Epiphytic macroalgae are phototrophic organisms that attach to rigid substrates in the intertidal zone and serve as key components of coastal ecosystem structure due to their roles in providing habitat, stabilizing substrates, and supporting nutrient cycling. This study aimed to inventory the types of epiphytic macroalgae present in the rocky intertidal zone of Padang Unoi Village, Salang District, Simeulue Regency. Observations were conducted in July 2025 along a 150-m transect, dividing the area into two tidal zones: the lower littoral and the mid-littoral. The inventory revealed seven species of epiphytic macroalgae, namely Turbinaria sp, Sargassum sp, Padina sp, Chaetomorpha aerea, Caulerpa taxifolia, C. racemosa, and Amphiroa subcylindrica. Species from the Phaeophyta division dominated the mid-littoral zone, while Chlorophyta were more abundant in the lower littoral zone, and Rhodophyta were observed on coarse-textured rocky substrates. These three major divisions indicate habitat heterogeneity that supports the growth of various types of epiphytic macroalgae. The results of this study highlight the importance of the rocky intertidal zone of Simeulue as a productive habitat and provide a basis for sustainable coastal resource management
The Effect of Eucheuma cottonii Seaweed Flour Addition on the Preference Level of Dogol Shrimp Nuggets Hanun, Inas Maya Tamimah; Rostini, Iis; Haetami, Kiki; Pratama, Rusky Intan
Jurnal Natur Indonesia Vol. 23 No. 2 (2025): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.2.116-125

Abstract

This study aims to determine the effect of adding Eucheuma cottonii seaweed flour on the preference level of dogol shrimp (Metapenaeus monoceros) nuggets. Dogol shrimp nuggets have high protein content but are low in fiber, so adding seaweed flour as a dietary fiber source is expected to improve the nutritional value and product quality. The research used an experimental method with four treatments of seaweed flour addition to dogol shrimp nuggets: 0% (control), 1.5%, 2.5%, and 3.5%. Hedonic testing was conducted with 25 semi-trained panelists as replicates to evaluate sensory attributes (color, aroma, taste, and texture). Based on panelist preference level and Bayes test results, the priority product was subsequently analyzed through proximate analysis (moisture, protein, fat, and ash), crude fiber content, and texture testing (Texture Profile Analysis). The research showed that adding seaweed flour significantly affected the increase in fiber content. The treatment with 1.5% seaweed flour addition was the best treatment with moisture content values of 61.11%; protein 8.47%; ash 1.84%; fat 1.78%; crude fiber 2.15%; and texture analysis values of hardness 4,315.7523 gForce; fracturability not detected; springiness 0.8487%; cohesiveness 0.5813%; gumminess 2,500.1247 gForce; chewiness 2,110.6553 gForce; and resilience 0.2553%. The addition of Eucheuma cottonii seaweed flour to dogol shrimp nuggets can serve as an innovation in developing healthier fishery product processing that consumers prefer
Structure of Intestinal and Kidney Tissue of Carp (Cyprinus carpio) Maintained in Salinity Media and Feed Enriched with Guava Leaf Flour (Psidium guava) Pulungan, Amar Doli; Windarti, Windarti; Eddiwan, Eddiwan; Effendi, Irwan; Kurniawan, Ronal
Jurnal Natur Indonesia Vol. 23 No. 2 (2025): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.2.136-143

Abstract

Carp (Cyprinus carpio) is one of the freshwater fishery commodities with high economic value. Keeping carp in saline media can affect the osmoregulation system, impacting the performance of vital organs such as the intestines and kidneys. Such disturbances can potentially reduce fish's health and survival rate. One strategy that can be used to increase the fish's immune system is through feed supplementation with natural immunostimulants, one of which is guava leaf flour (Psidium guajava), which is known to contain bioactive compounds such as flavonoids, tannins, and saponins. This study aims to evaluate the effectiveness of guava leaf flour-enriched feed on the histological structure of the intestines and kidneys of carp raised in saline media and exposed to Aeromonas hydrophila bacterial infection. The study was conducted from August to October 2024 at the Biotechnology Laboratory, Faculty of Fisheries and Marine, Universitas Riau. The method used was an experiment with a completely randomized design (CRD) consisting of five guava leaf flour dosage treatments with three replicates. The results showed that the histological structure of the intestine in all treatments was relatively normal, with neatly arranged villi and round to oval goblet cells. However, in the guava leaf powder supplementation treatment, several abnormalities were found in the kidney tissue, including inflammation, hemorrhage, and necrosis. This indicates that the salinity factor has a greater effect on kidney damage than the effect of immunostimulant administration. Nevertheless, the administration of guava leaf powder still positively improved the immune response and survival rate of fish. The optimal dose was obtained in treatment P2 (15 g/kg feed) with a survival rate of 83.33–93.33%. The water quality parameters during the study were still within the acceptable range for aquaculture, namely temperature 28–31°C, DO 3.7–7.4 mg/L, and pH 5.5–7. Thus, it can be concluded that feeding fish with guava leaf flour-enriched feed is effective in maintaining intestinal histology and increasing the survival rate of carp in saline media, although it cannot completely prevent kidney damage caused by environmental factors

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