cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota mataram,
Nusa tenggara barat
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 2,695 Documents
 263   264   265   266   267 
Biocontrol of Beauveria bassiana Against Leptocorisa acuta in Rice (Oryza sativa) Wisanggeni, Gen Adi; Nurhidayati, Febry
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
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.v26i2.11658

Abstract

The rice bug (Leptocorisa acuta) is a major pest during the grain filling stage of rice (Oryza sativa L.), causing significant yield losses. The use of entomopathogenic fungi such as Beauveria bassiana offers an environmentally friendly alternative for pest control. This study aimed to evaluate the effectiveness of B. bassiana against rice bug under screen house conditions. The experiment was conducted by applying a suspension of B. bassiana (100 g formulation per liter of water) through direct spraying on rice plants infested with 11 adult rice bugs. Observations were conducted for seven days after application. Results showed that mortality began on the third day after treatment and reached 45.45% by the sixth day. Infected insects exhibited reduced movement, decreased feeding activity, body discoloration, and external white mycelial growth. Laboratory confirmation showed typical morphological characteristics of B. bassiana. These results indicate that B. bassiana has potential as a biological control agent against rice bug, although further studies with larger sample sizes and statistical analysis are required to optimize its field application.
Description of Aedes sp Mosquito Population Density Based on Ovitrap Index in Babadan Hamlet Sukoharjo Army, Kristina; Rahma, Fina Laila; Santoso, Revana Putri; Haryatmi, Dwi
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
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.v26i2.11660

Abstract

Dengue Hemorrhagic Fever (DHF) remains a public health concern in endemic areas, where vector density determines transmission risk. This descriptive cross-sectional study aimed to determine the population density of Aedes sp.. mosquitoes based on the Ovitrap Index (OI) in Babadan Hamlet, Sukoharjo Regency. A total of 40 ovitraps were installed indoors for seven days and examined microscopically for egg detection. Larvae were morphologically identified, and adult mosquitoes were collected using the sweeping method for genus identification. The results showed that 2 ovitraps were positive for Aedes eggs, resulting in an OI of 5% (low density category). Larvae were detected in 25% of ovitraps. Adult mosquito identification revealed Aedes aegypti (100%) as the only species found, while Aedes albopictus was not detected. In conclusion, although the OI indicates low vector density, the presence of larvae and adult Aedes aegypti suggests a continued risk of DHF transmission. These findings emphasize the need for sustained vector surveillance and community-based control strategies to prevent dengue outbreaks.
Qualitative Analysis of Borax (Sodium Tetraborate) Content in Meatballs in Pidie Regency Najiba, Aliya; Sardi , Arif; Harahap, Diannita
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
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.v26i2.11677

Abstract

Food safety in street foods remains a serious challenge in Indonesia due to the widespread misuse of hazardous chemicals. This study aims to identify the presence of borax in food samples circulating in the community. A descriptive qualitative method was applied to 48 samples collected through purposive sampling across 12 sub-districts, with analysis conducted via the rosocyanine complex formation test. The results showed that 22 samples (45.8%) tested positive for borax, characterized by a color change to reddish-brown. These findings indicate that nearly half of the samples do not comply with the food safety standards set by BPOM Regulation No. 22 of 2023. Consequently, urgent intervention by relevant authorities is required to enhance consumer protection and ensure the distribution of safe food products within the region.
Antibiotic Resistance of Escherichia coli and Staphylococcus aureus Bacteria in Goats in Pematang Gajah, Jambi Damhuri, Dedi; Yatno, Yatno; Rizky, Asri; Safitri, Jessica Anggun; Syarifuddin, Ahmad
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
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.v26i2.11678

Abstract

Limited knowledge among smallholder goat farmers regarding appropriate antibiotic use may contribute to the emergence of antimicrobial resistance in livestock-associated bacteria. This study aimed to identify bacterial isolates and evaluate antibiotic resistance patterns of bacteria obtained from fecal and nasal mucosal swabs of goats in Pematang Gajah. Samples were collected from nine goats with three repeated examinations. Bacterial identification was performed using Gram staining followed by standard biochemical tests. The results showed that 8 of 9 isolates (≈90%) from fecal swabs exhibited biochemical characteristics consistent with Escherichia coli, including Indole (+), MR (+), VP (−), Citrate (−), TSIA A/A with gas production, positive motility, and metallic green sheen on EMB agar. A total of 7 of 9 isolates (≈76%) from nasal mucosal swabs demonstrated typical characteristics of Staphylococcus aureus, namely Gram-positive cocci, catalase-positive, coagulase-positive, mannitol fermentation positive, and β-hemolysis. Antibiotic susceptibility testing conducted on one isolate of E. coli and one isolate of S. aureus with three replications revealed the highest inhibition zones in E. coli against enrofloxacin (23.33 ± 0.58 mm) and gentamicin (21.33 ± 0.58 mm), categorized as sensitive, while high resistance was observed against tylosin (8.33 ± 0.58 mm) and penicillin–streptomycin (9.33 ± 0.58 mm). Staphylococcus aureus isolates showed high sensitivity to enrofloxacin (24.33 ± 0.58 mm), tylosin and gentamicin (22.33 ± 0.58 mm), but resistance to penicillin–streptomycin and ampicillin. These findings indicate variability in antimicrobial susceptibility among goat-associated bacteria and highlight the importance of susceptibility-based antibiotic selection to reduce antimicrobial resistance risk.
Effect of Fermentation of Palm Kernel Meal by a Bacterial and Yeast Consortium on Nutritional Quality Maulana, Fajri; Agasi, Satri Yusasra
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
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.v26i2.11680

Abstract

Palm kernel meal is a potential alternative feed ingredient due to its abundant availability; however, its utilization in poultry diets is limited by suboptimal nutritional quality. One strategy to improve its nutritional value is fermentation using microorganisms. This study aimed to evaluate the effect of palm kernel meal fermentation by a bacterial and yeast consortium on its nutritional quality. The experiment was conducted using a completely randomized design with four treatments and five replication: a (unfermented palm kernel meal), B (fermentation with Bacillus subtilis), C (fermentation with Saccharomyces cerevisiae), and D (combined fermentation with Bacillus subtilis and Saccharomyces cerevisiae). The observed parameters included moisture content, metabolizable energy, organic matter, and inorganic matter. Data were analyzed using analysis of variance (ANOVA) at a 95% confidence level. The results showed that fermentation using the bacterial and yeast consortium significantly affected (P<0.05) moisture content and metabolizable energy, but had no significant effect (P>0.05) on organic and inorganic matter. The combined treatment produced the best values, with a moisture content of 12.25%, a metabolizable energy of 3139.52 kcal/kg, an organic matter of 95.57%, and an inorganic matter of 4.43%. This study concludes that the fermentation of palm kernel meal using a consortium of Bacillus subtilis and Saccharomyces cerevisia is the most effective treatment for improving nutritional quality, particularly by increasing metabolic energy without reducing the content of organic and inorganic compounds.  
The Expansion of Palm Oil Plantation and the Crisis of Orangutan Habitat in Indonesia: A Literature Review Altaf, Carissa; Suranto, Suranto
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
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.v26i2.11690

Abstract

Indonesia is the country with the best biodiversity in the world, as measured by its terrestrial and marine biodiversity. However, at the same time, there is additionally a significant decline in biodiversity. One species experiencing population decline is the orangutan, because of the growth of oil palm plantations that convert natural forests, resulting in the loss and fragmentation of orangutan habitats. This paper aims to analyze the effect of oil palm plantation expansion at the orangutan habitat crisis in Indonesia. This paper uses a literature review method with a descriptive-qualitative approach, drawing on scientific journals, conservation organization reports, and official government documents. Data are analyzed descriptively and analytically to study the relationship between oil palm plantation growth and orangutan habitat. The outcomes of the study indicate that orangutans are noticeably depending on the complexity of natural forests for nesting and foraging. Forest conversion to homogeneous monoculture oil palm plantations reduces habitat and food sources and increases conflict between humans and orangutans. This has caused a decline within the orangutan population, resulting in its categorization as a critically endangered species. The weak implementation of oil palm plantation management and orangutan conservation policies further exacerbates the crisis of the orangutan habitat. Therefore, efforts to strengthen integrated palm oil plantation governance and orangutan conservation based on ecosystem restoration are crucial.
Comparative Analysis of DNA Barcodes in The Fabaceae Family Tsany, Haura Fikriyyah; Indriyani Roslim, Dewi
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
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.v26i2.11696

Abstract

In identifying plants, people are confused about choosing the appropriate barcode for identification. For that reason, this study aims to analyze four DNA barcode rbcL, matK, trnL-trnF IGS, and ITS in the Fabaceae family. DNA sequence were taken and collected from Genbank through the NCBI website, which is 30 species from 6 genera each consisting of 5 species and the outgroup (Acacia auriculiformis). DNA sequence analysis was performed using MEGA 11. Phylogenetic analysis were performed using the Neighbor Joing Tree (NJ) and Maximum Likehood (ML) methods. The results of the analysis sequence variation showed that the highest conserved site was found in rbcL (83.72%) and variable site was found in ITS (62.03%). The number of segregation sites, substitution rates and diversity values in the Fabaceae family were highest in the ITS, respectively (451), (0.155284), and (0.219148). In conclusion, the four DNA barcodes analyzed in the Fabaceae family, namely rbcL, matK, trnL-trnF IGS and ITS, were able to separate the genera in the Fabaceae family. Among the four DNA barcodes analyzed, ITS was superior in identifying the Fabaceae family. The results of this study can be used as information in identifying plants in the Fabaceae family.
Bivalve Biodiversity in Ekas Waters as an Indicator of Aquatic Environmental Quality Purbajati, Lalu Kinayung; Haris, Ali; Mukminah, Mukminah; Effendi, M. Harja
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
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.v26i2.11700

Abstract

Bivalves are one of the aquatic organism groups that play an important role in maintaining the balance of aquatic ecosystems. This role makes bivalves essential not only in food webs but also in sustaining overall water quality. This study employed a quantitative descriptive approach using a purposive sampling method. Sampling was conducted using hand nets, forceps, 1 × 1 m quadrat frames, buckets, plastic containers, gastropod identification guides, a GPS device, a pH meter, millimeter block paper, and a camera. The collected data were analyzed using community structure indices, including the Shannon–Wiener diversity index, evenness index, species richness index, Simpson dominance index, and importance value index. These indices were then interpreted to describe the condition of the aquatic environment. The results of the bivalve community structure analysis showed that the Shannon–Wiener diversity index (H′ = 1.840) indicated a moderate level of diversity, accompanied by a high evenness index (E = 0.885) and a low Simpson dominance index (D = 0.174). This combination of values suggests a relatively even distribution of individuals among species, with no single species strongly dominating the community. Overall, these conditions indicate that the water quality at the study site can be classified as moderate to good, or lightly polluted, and remains capable of supporting the sustainability of various benthic species.
Growth Response, Flavonoid Content, and Antioxidant Activity of Mustard Microgreen under Reduced Water Availability An'nisa, An'nisa; Harso, Wahyu; Lambui, Oryyani; Prismawiryanti, Prismawiryanti
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
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.v26i2.11701

Abstract

Mustard (Brassica juncea L.) has often been cultivated as a microgreen. Investigation into the impact of water stress effects on mustard in the microgreen stage is currently limited. The objective of this study was to assess the effect of reduced water availability on growth performance, flavonoid concentration, and antioxidant potential in mustard microgreens. Samples used to assess plant growth, flavonoid content, and antioxidant activity were collected from mustard plants grown in growth media under water availability of 90%, 70%, and 50% of field capacity. All acquired data were further evaluated by applying a one-way ANOVA. Reducing water availability to 50% field capacity did not impact growth, but it did enhance flavonoid content and antioxidant capacity. Peak values occurred at 70% of field capacity, with flavonoid content positively correlated with antioxidant activity. A water availability of 70% field capacity can be recommended as the optimal condition for producing mustard microgreens, as it effectively increases flavonoid content without inhibiting plant growth. This study confirms that growth parameters do not always accurately reflect the functional quality of plants; therefore, the evaluation of horticultural crops needs to include aspects related to secondary metabolites.
Profile of MYH9 SNP RS3752462 Gene Polymorphism in Chronic Kidney Disease (CKD) Patients with Hypertension Heryanti, Nabiilah Nuur Ainii; Qurrohman, Muhammad Taufiq
Jurnal Biologi Tropis Vol. 26 No. 2 (2026): April - Juni
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.v26i2.11711

Abstract

Chronic kidney disease (CKD) and hypertension are closely related conditions and can be influenced by genetic factors, including polymorphisms in the Myosin Heavy Chain 9 (MYH9) gene. The SNP rs3752462 in the MYH9 gene is known to be associated with impaired kidney function. This study aims to describe the genotype pattern of the MYH9 rs3752462 SNP polymorphism in patients with chronic kidney disease and hypertension at UNS Hospital. This is a descriptive study with a molecular analysis approach. A total of 10 blood samples were collected. Polymorphism detection was performed using the Polymerase Chain Reaction–Restriction Fragment Length Polymorphism (PCR-RFLP) method with the RsaI restriction enzyme. The results showed that all samples were successfully amplified, producing a PCR product of approximately 421 bp. The DNA bands observed in all samples did not form a consistent combination and did not match the expected genotype reference standard. In addition, the appearance of additional bands outside the target fragment size, therefore the results of this study do not adequately represent the MYH9 SNP rs3752462 gene polymorphism in the studied samples. Conclusion: Further examination is needed using other modern methods such as DNA sequencing and larger sample sizes to obtain appropriate results.

Page 265 of 270 | Total Record : 2695

 263   264   265   266   267 

Filter by Year

2013 2026


Reset
Filter By Issues
All Issue Vol. 26 No. 2 (2026): April - Juni Vol. 26 No. 1 (2026): Januari-Maret Vol. 25 No. 4a (2025): Special Issue Vol. 25 No. 4 (2025): Oktober-Desember Vol. 25 No. 4b (2025): Special Issue Vol. 25 No. 3 (2025): Juli-September Vol. 25 No. 2 (2025): April-Juni Vol. 25 No. 1 (2025): Januari - Maret Vol. 24 No. 4 (2024): Oktober - Desember Vol. 24 No. 3 (2024): July - September Vol. 24 No. 2b (2024): Special Issue Vol. 24 No. 2 (2024): April - Juni Vol. 24 No. 1 (2024): Januari - Maret Vol. 24 No. 1b (2024): Special Issue Vol. 23 No. 4 (2023): October - December Vol. 23 No. 3 (2023): July - September Vol. 23 No. 2 (2023): Special Issue Vol. 23 No. 2 (2023): April-June Vol. 23 No. 1 (2023): Special Issue Vol. 23 No. 1 (2023): January - March Vol. 22 No. 4 (2022): October - December Vol. 22 No. 3 (2022): July - September Vol. 22 No. 2 (2022): April - June Vol. 22 No. 1 (2022): January - March Vol. 21 No. 3 (2021): September - Desember Vol. 21 No. 2 (2021): Mei - Agustus Vol. 21 No. 1 (2021): Januari - April Vol. 20 No. 3 (2020): September - Desember Vol. 20 No. 2 (2020): Mei - Agustus Vol. 20 No. 1 (2020): Januari - April Vol. 19 No. 2 (2019): Juli - Desember Vol. 19 No. 1 (2019): Januari - Juni Vol. 18 No. 2 (2018): Juli - Desember Vol. 18 No. 1 (2018): Januari - Juni Jurnal Biologi Tropis vol.17 No.2 Desember 2017 Jurnal Biologi Tropis vol.17 No.1 Juni 2017 Jurnal Biologi Tropis. Vol.16 No.2 Desember 2016 Jurnal Biologi Tropis. Vol.16 No. 1 Juni 2016 Jurnal Biologi Tropis. Vol.15 no.2 Desember 2015 Jurnal Biologi Tropis. Vol.15 No. 1 Juni 2015 Jurnal Biologi Tropis. Vol.14 No. 2 Desember 2014 Jurnal Biologi Tropis. Vol.14 No. 1 Juni 2014 Jurnal Biologi Tropis. Vol.13 No. 2 Desember 2013 Jurnal Biologi Tropis. Vol.13 No.1 Juni 2013 More Issue