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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. 1 (2025): April" : 10 Documents clear
Identification of Vibrio sp. Bacteria in Intensive and Traditional Ponds of Vannamei Shrimp (Litopenaeus vannamei) in Teluk Pambang Village, Bengkalis Regency Gustina, Lenny; Feliatra, Feliatra; Nursyirwani, Nursyirwani; Widantari, Meilya
Jurnal Natur Indonesia Vol. 23 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.1.34-41

Abstract

The identification of Vibrio sp. bacteria in the water of intensive and traditional ponds for vannamei shrimp in Teluk Pambang Village was conducted from March to June 2023. The aim of this research was to calculate the quantity of Vibrio sp. bacteria, understand the morphological characteristics, and identify the various types of Vibrio sp. bacteria in the water of intensive and traditional ponds for vannamei shrimp. The sampling involved collecting water from 2 bottles each from intensive and traditional ponds. Subsequently, Vibrio isolation from the water was cultured on selective TCBS media through three dilution steps. The bacterial count was then determined. Further, bacterial cultures from different colonies were streaked on TSA media, followed by identification through a series of morphological observations and biochemical tests. The research results indicate that the presence of Vibrio bacteria in intensive ponds complies with the maximum threshold and quality standards for a favorable environment for both the pond and shrimp. However, for traditional ponds, there is an abundance of Vibrio bacteria exceeding the threshold, where the maximum limit or good quality standard for Vibrio in the environment and shrimp is 103 CFU/ml. The morphological characteristics found include a round shape, green and yellow color, and a flat edge with emerging elevations. Furthermore, infections of Vibrio hollisae, Vibrio anguillarum, and Vibrio damsela were identified in the water of intensive and traditional ponds for vannamei shrimp (Litopenaeus vannamei) in Teluk Pambang Village, Bengkalis Regency.
Types and Abundance of Beach Waste in the Coastal Area of Kampung Beran Tanjung Harapan, Meranti Islands District Exaudi, Bonita Tiolina; Amin, Bintal; Nedi, Syahril
Jurnal Natur Indonesia Vol. 23 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.1.29-33

Abstract

This research was carried out in June 2023; the research location was on the coast of Kampung Beran, Tanjung Harapan, Meranti Islands Regency. This research aims to determine the type and abundance of beach litter, analyze the differences in the type and abundance of beach waste between stations, and analyze the type and abundance of beach litter between sampling times. Beach litter data collection was taken at three stations, with each station 25m in distance. Each station has three transect lines with nine plots or quadrants measuring 5×5 m2 with a distance between plots of 5m. Sampling was conducted during low tide and on weekdays (Tuesday, Wednesday) and weekends (Saturday, Sunday). Based on the research results, five types of beach litter were found, namely plastic (40%), iron/metal materials (5%), broken glass/ceramic (31%), rubber (3%), wood (11%), and others (10%). The highest abundance of waste occurred on weekdays (10,59 units/m2), and the lowest waste occurred on weekends (7,97 units/m2). ANOVA analysis and independent sample test show that the abundance of beach litter waste between stations and between sampling times did not have significant differences (P > 0.05).
Effect of Chitosan Extracted from Vannamei Shrimp (Litopenaeus vannamei) Shells in Feed on the Growth Performance and Digestibility of Nile Tilapia (Oreochromis niloticus) Rangkuti, Putra; Suharman, Indra; Siagian, Desi Rahmadani
Jurnal Natur Indonesia Vol. 23 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.1.1-9

Abstract

Chitosan extracted from vannamei shrimp shells has the potential to act as an attractant for Nile tilapia (Oreochromis niloticus) while also enhancing growth performance and digestibility in various fish species. This study evaluated the impact of chitosan supplementation in feed on Tilapia's growth rate and digestibility. The experiment was designed using a Completely Randomized Design (CRD) with five treatment groups and three replications. Fish were fed diets containing chitosan at 0%, 1%, 2%, 3%, and 4% for 56 days. 525 tilapia fingerlings (2.50±0.41 g) were stocked in 15 floating net cages (1x1x1 m3). Feed was provided at 10% of the fish biomass three times daily at 08:00 AM, 01:00 PM, and 05:00 PM. The results indicated that chitosan supplementation significantly (P<0.05) influenced Tilapia's specific growth rate and digestibility. Among the tested levels, the 4% chitosan treatment yielded the highest values, including overall digestibility (52.38%), protein digestibility (74.72%), protein retention (27.27%), feed efficiency (34.77%), specific growth rate (3.33%), and 100% survival rate. These findings suggest that incorporating chitosan into tilapia feed can enhance growth performance and nutrient utilization.
Utilization and Contribution of Non-Timber Forest Products to the Community Economy in Sentajo Protected Forest Suhada, Nur; Somadona, Sonia; Dilas, Akbar Alldhu
Jurnal Natur Indonesia Vol. 23 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.1.16-21

Abstract

The potential of Non-Timber Forest Products (NTFPs), in general has not been optimally utilized. The processing of NTFPs for the people of Koto Sentajo Village is still not the primary source of income for the community but is part of fulfilling daily living needs. This study aims to determine the types of NTFP utilization and their contribution to the economy of the community in Koto Sentajo Village. This study uses a qualitative descriptive approach, and primary data were collected through observation and in-depth interviews using purposive sampling techniques. Data were analyzed quantitatively. The results of this study found that the types of NTFPs utilized by the people of Koto Sentajo Village are fruits and medicinal plants; the types of fruits are keranji (Dialium indum), tampui (Baccaurea macrocarpa), geruntang (Phoebe grandis), cempedak (Artocarpus fretessii), forest durian (Durio zibethinus), kulim (Scrodocarpus borneensis), petai (Parkia speciosa), and barangan (Castanopsis argentea). In contrast, the types of medicinal plants most widely utilized are sepico (Eurycoma longifolia Jack) and rosam (Dicranopteris linearis). The contribution of NTFPs to the people's economy in Koto Sentajo Village is 5.6% of the total income of the community, or around IDR 1,519,851/person/year, to the average total income of IDR 26,983,265/person/year
Distribution and Clinical Significance of Nuclear Factor Erythroid 2-Related Factor 2 Gene Polymorphism in Chronic Hepatitis B: A Cross-Sectional Study Yuhendri, Vitriyanna Mutiara; Labecka, Magda; Ibrahim, Sundus; Arfianti, Arfianti
Jurnal Natur Indonesia Vol. 23 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.1.10-15

Abstract

Chronic hepatitis B (CHB) infection is associated with serious complications, including liver cirrhosis and hepatocellular carcinoma (HCC). Nuclear factor erythroid 2-related factor 2 (NRF2) is a transcription factor that regulates the expression of antioxidant genes, helping protect cells and tissues from oxidative stress, a process involved in the pathogenesis of chronic hepatitis B (CHB). This study aimed to determine the distribution of NRF2 polymorphisms in CHB patients and their association with complications. The study included 68 CHB patients, with 33 having no complications and 35 with complications (Cirrhosis and HCC). Genotyping of the NRF2 polymorphisms, rs35652124 (A→G) and rs6721961 (C→A), was performed using confronting two-pair primers and polymerase chain reaction (PCR-CTPP). The serum levels of bilirubin, albumin, and alanine aminotransferase (ALT) were measured using commercial kits. The mean age of subjects was 45.34±1.32 years old on average. There was no significant difference in mean bilirubin and ALT levels between patients with and without CHB complications. However, patients without complications had significantly higher albumin levels than those with complications (4.0±0.8 vs. 3.37±0.7 g/dL; p<0.05). The most common genotypes for NRF2 rs35652124 were AG (51.85%), AA (40.74%), and GG (7.41%), while for NRF2 rs6721961, the were CA (51.47%), CC (45.59%), and AA (2.94%). The distribution of NRF2 genotypes did not differ significantly between CHB patients with and without complications (p>0.05). This study suggests that NRF2 gene polymorphisms may not contribute to the development of Cirrhosis and HCC in CHB. Further research with a larger sample size is needed to confirm these findings.
Carbon Stock in Sediments of Mangrove Ecosystems in Pangkalan Jambi Village, Bengkalis Regency Furqan, M. Alief; Amin, Bintal; Nursyirwani, Nursyirwani
Jurnal Natur Indonesia Vol. 23 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.1.22-28

Abstract

The study on carbon reserves in sediment within Pangkalan Jambi Village, Bengkalis Regency's mangrove ecosystem, was conducted from June to 2024. This research aimed to analyze carbon reserves in the sediment of the mangrove ecosystem in Pangkalan Jambi Village, Bengkalis Regency, Riau Province. The study employed field survey methods and laboratory analyses, focusing on three stations with varying mangrove densities. Results revealed nine mangrove species, dominated by Rhizophora mucronata. The average mangrove density was 2,611 individuals/ha, with a carbon reserve of 43.25 tons/ha across all stations. The study found a positive correlation (r = 0.528) between mangrove density and carbon reserves, explaining 27.98% of the total variation. Furthermore, carbon reserves showed no significant differences across sediment depths. These findings emphasize the importance of mangrove conservation for carbon storage, contributing to climate change mitigation. Further biomass and species-specific carbon storage research is recommended to optimize mangrove management strategies.
Study of Waves, Currents and Coastline Changes in North Rupat Sub-District, Bengkalis Regency, Riau Fathurrahman, Febri; Mubarak, Mubarak; Nurrachmi, Irvina; Rifardi, Rifardi; Ilahi, Ilham
Jurnal Natur Indonesia Vol. 23 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.1.42-49

Abstract

The Malacca Strait, between the island of Sumatra and the Malaysian Peninsula, is classified as an international strait. One of the Indonesian islands in the Malacca Strait is Rupat Island, which is the outermost small island of the Indonesian territory and has a sub-district directly facing the Malacca Strait, namely North Rupat Sub-district resulting in the phenomenon of shoreline change in this area. The location that became the research object is the coastal waters of the North Rupat District. The research aimed to investigate the coastline changes in Rupat Utara over the past 20 years and analyze the physical oceanographic factors affecting the area. The research method used in the research is survey methods. Primary data collected were wave, tidal, and sediment data. Sediment sampling was carried out using a sediment grab at the research stations, with each station being sampled three times. The sediment samples were collected at intervals of 50 meters between sampling points at each station. The results of the analysis of changes in the coastline of North Rupat District carried out using DSAS, and it can be seen that in the period 2003 to 2023, there was a change in the coastline, which was dominated by the accretion process with the highest accretion value at 252.80 m, the lowest abrasion value was -111.29 m, and an EPR value of 2.20 m/year. The current velocity and wave height in these waters are categorized as low. The sediment fraction in this area falls into the sand and mud categories
Analysis of Mangrove Forest Changes Using Satellite Image Data on Rupat Island Agusti, Dinda Roanna; Mubarak, Mubarak; Efriyeldi, Efriyeldi; Rifardi, Rifardi; Mulyadi, Aras; Zulkifli, Zulkifli; Ilahi, Ilham
Jurnal Natur Indonesia Vol. 23 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.1.50-57

Abstract

Mangrove forest vegetation is spread across several islands in Indonesia, including Rupat Island. Rupat Island is the outermost island in Riau Province, close to Malaysia, and directly faces international waters, namely the Malacca Strait. Rupat Island has two sub-districts, namely Rupat District and North Rupat District. Rupat Island has a very extensive mangrove forest and has a significant contribution. Monitoring changes in mangrove forests is one way of controlling the mangrove forest ecosystem. This research aims to analyze changes in mangrove vegetation area and mangrove density using the MVI algorithm in 2013 and 2023 on Rupat Island, Bengkalis Regency. This research was conducted in the mangrove forest ecosystem on Rupat Island, Bengkalis Regency, Riau Province. The method used in this research is a survey method with observation and field data collection (ground check). Based on image processing results, the area of ​​mangrove vegetation was 13903.03 ha (2013) to 11748.66 ha (2023) and experienced a reduction of 2154.37 ha. Classification based on MVI in sparse density has an area of ​​5872.46 ha (2013), decreasing to 3422.05 ha (2023); medium density has an area of ​​2188.84 ha (2013), increasing to 3334.64 ha (2023), and dense density has an area of ​​5841.73 ha (2013) reduced to 4991.97 ha. Over 10 years, the density of mangrove vegetation has increased in the medium class and tends to decrease in the sparse and dense classes. Based on calculations, the density of mangroves on Rupat Island falls into the tree category, ranging from 1150.00 ind/ha to 1450.00 ind/ha, which is considered good, and the sapling category ranges from 366.67 ind/ha to 1050.00 ind/ha, which is classified as good.
Utilization of Sesai as an Environmentally Friendly Planting Media: Case Study of Buruk Bakul Village, Bukit Batu Subdistrict, Bengkalis Regency, Riau Fadliyati, Refo; Sumiarsih, Eni; Budijono, Budijono
Jurnal Natur Indonesia Vol. 23 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.1.63-67

Abstract

Indonesia has abundant natural resources, including the Bengkalis coastal area. Bengkalis waters are the largest in Riau Province, with a water area of 677,472.44 km2. One of the coastal areas is Buruk Bakul Village in Bukit Batu District, Bengkalis Regency, which has an area of about 68.05 km2. However, when viewed from the condition of the waters, marine debris poses a threat. Organic waste or sesai inhibits the growth of mangrove saplings and even causes death in mangrove saplings. The location of the research object is the coast of Buruk Bakul Village. The research objectives are to determine the potential of sesai to be used as an organic planting medium and to know the community's social perceptions and economic perceptions towards sesai as a planting medium. The research method used in this research is the survey method. Primary data included the results of NPK analysis on sesai, questionnaires, interviews, and observations in the field. Purposive sampling was carried out using the Geographic Information System (ArcGIS) along the coast of Buruk Bakul Village to measure sesai potential. The analysis results show the abundant potential of sesai, which can increase utilization into environmentally friendly planting media with the availability of a total volume of sesai of 39,029.5 m³ with an average volume per location of 2,295.8 m³. NPK content analysis (0.41%, 19.44 mg/100g, and 21.84 mg/100g) can be used as planting media. Social perception showed community initiative through survey results, which showed that 64% of respondents responded well. Economic perception by utilizing sesai as a planting medium can provide a profit of IDR.3,000 per unit, opening up opportunities for increased income for the people of Buruk Bakul Village
Induction of Organogenesis and Regeneration Species Tagetes erecta In Vitro Apriliani, Elisa; Sukma, Dewi; Sudarsono, Sudarsono; Syukur, Muhammad
Jurnal Natur Indonesia Vol. 23 No. 1 (2025): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.23.1.58-62

Abstract

Marigold (Tagetes erecta) from the Asteraceae family is well-known for its various uses as cut flowers, potted plants, ornamental plants, medicines, dyes, and biopesticides. Micropropagation and optimization of in vitro regeneration of T.erecta species provide opportunities for plant propagation and utilization of biotechnology in plant breeding. This study evaluated the regeneration efficiency of in vitro plantlet leaf explants with different combinations of IAA and BAP concentrations in organogenesis induction media. IAA concentration affects the growth of adventitious shoots on explants. Decreasing IAA concentration affects the percentage of shoot growth, roots, and average number of roots in organogenesis induction media. Meanwhile, adding cytokinins to the induction media will modulate auxin movement during organogenesis and plant cell regeneration. Leaf explants on Murashige and Skoog (MS) media supplemented with 2.8 µM IAA + 31.0 µM BAP showed shoot growth reaching 58%, with root growth reaching 32%. Meanwhile, using lower BAP 2.8 µM IAA + 13.3 µM BAP resulted in 63% of explants forming shoots with a lower percentage of root growth. Increasing the concentration of IAA (5.7 µM + 13.3 µM BAP) showed a root formation response reaching 61% with a smaller number of shoots (48%). The explant response began with the explant part differentiating to form a callus with a growing point that would form yellowish-green shoots (RHS / Fan3-N144-C) at 28 days of induction

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