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INDONESIA
Jurnal Biologi Tropis
Published by Universitas Mataram
ISSN : 14119587     EISSN : 25497863     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Jurnal Biologi Tropis (ISSN Cetak 1411-9587 dan ISSN Online 2549-7863) diterbitkan mulai tahun 2000 dengan frekuensi 2 kali setahun oleh Program Studi Pendidikan Biologi PMIPA FKIP Universitas Mataram, berisi hasil penelitian dan ulasan Ilmiah dalam bidang Biologi Sains.
Arjuna Subject : -
Articles 2,520 Documents
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Malaria-Associated Anaemia: A Cross-Sectional Study in Mau Bokul Village, East Sumba Lalel, Indah Christine; Deo, Dwita Anastasia; Setianingrum, Elisabeth Levina; Handoyo, Nicholas Edwin
Jurnal Biologi Tropis Vol. 25 No. 4a (2025): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4a.11128

Abstract

Malaria remains a major public health challenge in eastern Indonesian and anaemia is a principal haematological complication with notable clinical and functional consequences. Community-based data quantifying malaria-associated anaemia in East Sumba are scarce. This study aimed to determine the prevalence of anaemia associated with malaria and to evaluate the association between malaria infection and anaemia among residents of Mau Bokul Village, East Sumba. An analytical cross-sectional survey was conducted on 98 community participants recruited by consecutive sampling during June–July 2025. Malaria diagnosis was established by microscopy of Giemsa 3%-stained thick blood films and haemoglobin (Hb) was quantified using a point-of-care digital meter (Easy Touch GCHb). Fisher's Exact Test analyzed the association between malaria and anaemia with significance set at (p < 0.05).  The results are indicate malaria prevalence was 8.2% (8/98), and anaemia prevalence was 34.7% (34/98). All malaria-positive individuals were anaemic. The association between malaria and anaemia was statistically significant (p < 0.001).
Literature Review: Potential Activity of Natural Ingredients as Antibiofilm Agents against Pathogenic Bacteria in Vitro Muktiali, Abdul Hamid; Hidayati, Agriana Rosmalina
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4b.11129

Abstract

Natural materials have great potential as sources of active antibiofilm compounds that can inhibit or destroy the biofilm matrix of pathogenic bacteria. Based on this, this review article was compiled as a systematic review journal to trace, select, and analyse various scientific publications related to the antibiofilm activity of natural materials over the past 10 years. The review focuses on the in vitro testing methods used in these journals, namely the Microtiter Plate Assay, tube test, direct microscopic observation, and post-test only control group design. The review results indicate that differences in testing methods yield varying levels of sensitivity and accuracy in observations; however, all demonstrate that antibiofilm efficacy is significantly influenced by phytochemical content, test concentration, and bacterial type. Thus, the selection of appropriate testing methods and comprehensive phytochemical analysis are key factors in supporting the development of effective, applicable, and environmentally friendly antibiofilm formulations based on natural materials.
Production, Quality Analysis, and Application of Solid Organic Fertilizer from Household Organic Waste Using Takakura Method on the Growth of Zea mays Hidayah, Wardatul; Wulandari, Diepa Febriana; Alkas, Taufiq Rinda; Sardianti, Andi Lelanovita; Pratiwi, Wike; Isra, Nur; Maruf, Shalehuddin Denny; Suparjo, Suparjo
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4b.11134

Abstract

Garbage is a serious environmental problem, especially in urban areas. If organic waste is not processed, it will experience uncontrolled decomposition which can produce dangerous gases and leachate that pollute the environment. This study aimed to produce and evaluate the quality of solid organic fertilizer derived from household organic waste using the Takakura method and to determine its effect on the growth of maize (Zea mays). Fertilizer quality was analyzed based on pH, C-organic content, and macronutrients, including nitrogen (N), phosphorus (P), and potassium (K). The fertilizer was used on maize crops by utilizing a completely random approach with three different types of planting media. The growth factors measured included the height of the plants, leaf count, and leaf surface area at 21 and 28 days post-planting. Findings indicated that the solid organic fertilizer possessed a pH of 8.51, an organic carbon content of 0.8%, and a total macronutrient level (N + P₂O₅ + K₂O) of 1.79%, which fell short of the national quality guidelines for solid organic fertilizers. Nevertheless, the application of solid organic fertilizer improved maize growth compared to the control treatment, particularly in the P2 treatment, which showed the best results in terms of leaf number and leaf area. These findings indicate that solid organic fertilizer produced using the Takakura method has potential to be utilized as a soil conditioner and as a supporting input for plant growth.
Test of Antibacterial Activity of Star Fruit Leaf Ethanol Extract (Averrhoa bilimbi linn) Against the Growth of Propionibacterium acnes Mory, Ogy Rya; Rini, Desi Indria; Nurina, Rr. Listyawati; Manongga, Fidriati Olivia
Jurnal Biologi Tropis Vol. 25 No. 4a (2025): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4a.11135

Abstract

Treatment of Propionibacterium acnes infection can use antibiotics, but the use of antibiotics in the wrong dosage can trigger antibiotic resistance. The development of natural antibacterial research with herbal plant ingredients is one alternative to reduce the incidence of resistance. One of the plants used is star fruit leaf (Averrhoa bilimbi linn). This research aims to determine the antibacterial activity of ethanol extract of star fruit leaf (Averrhoa bilimbi linn) against the growth of Propionibacterium acnes. This research used a true experimental design research type with a post-test only control group design. This research used star fruit  leaf extract which is macerated using 70% ethanol solvent and evaporated until a thick extract is obtained. Testing of antibacterial activity using the disc diffusion method (Kirby-Bauer) against the bacteria Propionibacterium acnes. The analysis used is  the One Way Anova statistical test. Star fruit leaf extract contains alkaloid compounds, tannins, saponins, flavonoids, and steroids. The test results show that the average diameter of the inhibition zone formed by each sample was at a concentration of 100% of 17,07 mm, a concentration of 50% of 15,21 mm, a concentration of 25% of 14,16 mm, a concentration of 12,5% of 12,86 mm, a concentration of 6,25% of 12,08 mm, a concentration of 3,125% of 10,58 mm and a concentration of 1,56% of 9,16 mm. Star fruit leaf extract (Averrhoa bilimbi linn) has antibacterial activity against the growth  of Propionibacterium acnes.
Analysis of The Profitability of Traditional Tuna Processing (Boiling) Businesses in Mataram City Aprilina, Anggun Rizki Siami; Junaidi, Muhammad; Noviyanti, Rinda
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i1.11140

Abstract

One of the leading fisheries products in Mataram City is boiled skipjack tuna (pindang ikan tongkol). This study aims to identify the potential and procurement of raw materials for boiled skipjack tuna processing in Mataram City and to analyze the financial feasibility (business profitability) as well as the development strategies of traditional boiled skipjack tuna processing enterprises. Data were collected using a descriptive quantitative approach through surveys, interviews, and documentation. Data analysis employed business feasibility analysis, including profitability, R/C ratio, ROI, and Payback Period (PBP), as well as SWOT analysis. The results indicate that traditional boiled skipjack tuna processing enterprises in Mataram City have considerable potential and promising sustainability prospects. The procurement of skipjack tuna raw materials is sourced from local fishermen, surrounding areas, and the availability of cold storage facilities, which play a crucial role in maintaining production continuity. The boiled skipjack tuna processing business in Mataram City is proven to be feasible and profitable for further development. This is reflected in the average annual profit, which reaches IDR 47,964,060 for micro-scale enterprises and IDR 141,405,000 for small-scale enterprises. The R/C ratio is 1.06 for micro-scale enterprises and 1.04 for small-scale enterprises. The ROI values are 28% for micro-scale enterprises and 21% for small-scale enterprises, with a very short Payback Period of 14–18 days. The business development strategy places boiled skipjack tuna processing enterprises in a strategic position that enables the implementation of aggressive strategies through the optimization of internal strengths and the utilization of external opportunities to enhance competitiveness and business sustainability.
Qualitative Phytochemical Screening of Ethanolic Extract of Ocimum basilicum L. Leaves Bahri, Syamsul; Wirdullutfi, Wirdullutfi; Hijriani, Baiq Isti
Jurnal Biologi Tropis Vol. 25 No. 4a (2025): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4a.11142

Abstract

Ocimum basilicum L. (basil) leaves are widely recognized for their potential bioactive compounds. This study aimed to qualitatively evaluate the phytochemical constituents of ethanolic extracts of basil leaves. Dried basil leaves were extracted using 96% ethanol, and the resulting extract was subjected to standard phytochemical screening tests to identify major secondary metabolites. The results revealed a strong presence of alkaloids and steroids, indicating that these compounds are dominant constituents in the ethanolic extract. In addition, flavonoids, tannins, and phenolic compounds were detected at lower intensities, suggesting their presence in smaller amounts. Conversely, terpenoids and saponins were not detected in the extract. These findings indicate that ethanol is an effective solvent for extracting alkaloids and steroids from basil leaves, while its efficiency for terpenoids and saponins may be limited. The presence of these secondary metabolites supports the potential biological activity of Ocimum basilicum leaves and provides a scientific basis for further studies on their pharmacological and biological activities.  
Test of the Ability of Fluorescent Pseudomonas to Dissolve Phosphate Norman, Mayanda; Advinda, Linda; Chatri, Moralita; Handayani, Dezi
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4b.11143

Abstract

Phosphate is a vital nutrient required for plants, yet its presence in the soil is frequently limited due to being held by specific ions. Microorganisms that solubilize phosphate, particularly fluorescent Pseudomonas, are considered among the most efficient agents for phosphate solubilization. This research intends to assess the capacity of six fluorescent Pseudomonas isolates derived from the rhizosphere of different plants to solubilize phosphate, and to analyze their IKF values. The research was carried out descriptively from June to August 2025 at the Plant Physiology Laboratory, Faculty of Mathematics and Natural Sciences, Padang State University. Observations were conducted by noticing the development of clear zones and determining the IKF values. The findings indicated that every isolate, specifically PfPj1, PfS36, PfLAHP2, PfCas, PfS31, and PfKd7, was capable of solubilizing phosphate. The highest IKF value was found in isolate PfKd7 (4.91), whereas the lowest was recorded for PfS36 (4.08). Variations in IKF values indicate differences in the capacity of each isolate to release organic acids, which are involved in the phosphate solubilization process. This discovery reinforces the capability of fluorescent Pseudomonas as an eco-friendly biological agent to enhance phosphorus availability.
Growth and Yield Response of Rice (Oryza sativa L.) to Compound Copper and Zinc Micronutrient Fertilization Lubis, Sutan Tarmizi; Putra, Eka Tarwaca Susila; Silmia, Betha
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i1.11147

Abstract

This study evaluated a Zn–Cu compound micronutrient fertilizer on plant growth, yield components, grain yield, and fertilizer-use efficiency of Inpari 32 rice. A field experiment was conducted in an Inceptisol paddy field (1,100 m²) in Margokaton, Seyegan, Sleman, Yogyakarta, Indonesia (January–April 2025). Treatments were arranged in a non-factorial completely randomized design with eight fertilizer regimes and four replications, combining NPK with graded rates of Zn+Cu fertilizer. Pre- and post-planting soil nutrient analyses and post-harvest leaf tissue nutrient analyses were conducted, and vegetative traits, yield, Relative Agronomic Effectiveness (RAE), and fertilizer-use efficiency were evaluated. Soil Zn and Cu were initially very high and high, respectively, but remained below toxicity thresholds. Compared with regimes without Zn+Cu, Zn+Cu additions significantly increased plant height, tiller number, and milled dry grain yield. Treatments P2–P7 achieved RAE >100%, indicating greater agronomic effectiveness than the non-Zn+Cu regimes. The most effective dosage was P6 (1 dosage NPK + 1.5 dosage Zn+Cu).
The Effect of Bay Leaf (Syzygium polyanthum) Extract on The Hepatic Histopathology of Male White Rats (Rattus norvegicus) Induced by Ibuprofen Dirganingrum, Kadek Galuh; Damanik , Efrisca M. Br.; Nugroho, Teguh Dwi; Deo, Dwita Anastasia
Jurnal Biologi Tropis Vol. 25 No. 4a (2025): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4a.11149

Abstract

Excessive use of ibuprofen can trigger Drug Induced Liver Injury (DILI) through oxidative stress mechanisms. Syzygium polyanthum (bay leaf) contains antioxidant compounds with potential hepatoprotective activity. Objective to determine the effect of ethanol extract of bay leaves on the improvement of liver histopathology in ibuprofen-induced rats. This experimental study used 36 Sprague Dawley rats divided into six groups: Negative Control, two Positive Controls (ibuprofen induction), and treatment groups P1, P2, and P3 (ibuprofen induction + extract at doses of 50, 150, and 250 mg/kgBW). Histopathological changes were evaluated using the Manja Roenigk scoring system. Data were analysed using the Kruskal–Wallis test followed by Dunn’s Post Hoc test. There were significant differences among groups (p < 0.001). Group P3 (250 mg/kgBW) showed the lowest damage score (1.35 ± 0.15), approaching normal conditions, and differed significantly from P1 (2.37 ± 0.27), which showed the highest damage. Lower doses did not provide optimal improvement. Bay leaf extract significantly improved liver histopathology in ibuprofen-induced rats in a dose-dependent manner, with the most effective dose being 250 mg/kgBW.
Traditional Processing of Red Moke Arak from Lontar Palm Sap in Aimere District, Ngada Regency Bao, Antonia P.; Limbu, Umbu N.; Lea, Victoria Coo
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4b.11150

Abstract

Aimere is one of the districts in Ngada Regency that has many moke factories using palm sap and has been passed down throught generations as a source of livelihood for the community. This research aims to gather information about the process of red moke arak produced, the factors influencing its production, and marketing strategies. The research uses an exploratory descriptive method with data collection techniques including observation, interviews, and documentation. The results show that the production of red moke arak goes throught palm sap fermentation, distillation, spice addition, soaking of red moke arak and spices, filtration, and storage. Factors influencing production include the quality of palm sap, fermentation process, cleanliness of equipment, temperature, spices, spice soaking time, and storage method. The marketing strategy for red moke arak still uses simple methods thru stalls and social media, with the price per jumbo jerrycan being Rp. 1,000,000, while in 700 ml bottles it is sold for Rp. 35,000 – 40,000. The moke product produced has great potential for economic profit, so it is hoped that the marketing of this product will be expanded with more adequate sales techniques and brand labels, allowing it to be safely marketed to other areas beside Ngada Regency.

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