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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 2,949 Documents
 288   289   290   291   292 
Seagrass Community Structure in the Coastal Waters of Pandanan Sekotong Barat, West Lombok Maulida Suryatni; Didik Santoso; Lalu Japa
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12746

Abstract

Seagrass ecosystems play a crucial role in marine environments, particularly in supporting coastal biodiversity and maintaining ecological balance. The coastal waters of Pandanan Beach are ecologically vital but potentially exposed to anthropogenic pressures such as boat mooring and local foraging ("madak") activities. This study aimed to identify the species composition and analyze the community structure, including density, diversity, dominance, and coverage of seagrass in coastal waters at Pandanan Beach. Data collection were conducted using a quadrate transect method across three distinct transects. The results showed that a total of 7 seagrass species were identified, namely Cymodocea rotundata, C. serrulata, Enhalus acoroides, Halodule pinifolia, Halophila decipiens, Syringodium isoetifolium, and Thalassia hemprichii. The overall community structure of the seagrass was relatively stable and healthy, characterized by a mean total density of 163 ind/m² and an average canopy coverage of 52.28%. The species diversity index (H' = 1.65) fell into moderate category, supported by a low dominance index (D = 0.22), indicating an even distribution of species across the habitat. These findings suggest that despite ongoing human activities, the seagrass ecosystem in the coastal waters at Pandanan Beach remains in a resilient and healthy condition.
The Influence of Health Education Through TikTok Media on Adolescents' Knowledge and Attitudes about Premarital Sex Liawati Liawati; Rika Mahardika Nuraeni
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12749

Abstract

Premarital sexual conduct in teenagers is a matter of reproductive health that may lead to an increased chance of unintended pregnancies, sexually transmitted diseases, and dropping out of school. Social media platforms, especially TikTok, could serve as a powerful tool for education, as they align well with the traits of adolescents. This research seeks to evaluate how effective TikTok education is in influencing knowledge and attitudes regarding premarital sex among female pupils from SMA Negeri 1 Rengasdengklok. The approach taken for this investigation was a pre-experimental design involving a one-group pretest–posttest. The participant group included 85 female students from grade XI IPA, chosen through proportionate stratified random sampling. Information was collected via a validated and reliable questionnaire, subsequently analyzed with the Wilcoxon Signed-Rank Test. Prior to the educational intervention, 95.3% of participants displayed poor knowledge while 84.7% exhibited negative attitudes. Following the TikTok education, all participants (100%) demonstrated good knowledge and positive attitudes. The analysis revealed a notable difference between the pretest and posttest results concerning both knowledge and attitude (p < 0.001). Health education utilizing TikTok proves effective in enhancing knowledge and developing favorable attitudes towards premarital sexual behavior. This approach could represent an innovative option for advancing reproductive health education that resonates with young people's traits.
The Effect of Eating Patterns on the Learning Achievement of Grade X DKV Students at SMK Budi Bakti Ciwidey Fitri Puspita Sari; Al-Ainna Rossel Ekasuci Elhany
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12750

Abstract

Academic success is a measure of educational progress that is shaped by multiple factors, one of which is nutrition. A poor diet can interfere with cognitive abilities and may adversely impact the academic performance of teenagers. This research aims to explore the link between eating habits and the academic performance of 10th-grade students in Visual Communication Design (DKV) at SMK Budi Bakti Ciwidey, located in Bandung Regency. A quantitative research method with a cross-sectional layout was employed for the study. The sample included 58 students chosen through simple random sampling from a total of 135 students. Data on dietary habits were gathered using a Food Frequency Questionnaire (FFQ), while academic performance information was collected from report card grades for the odd semester of the 2024/2025 academic year. Data analysis was performed univariately and bivariately utilizing Fisher's Exact Test at a significance level of 5%. Findings indicated that 74.1% of participants maintained a nutritious diet, and 96.6% exhibited commendable academic performance. The bivariate test results revealed no significant correlation between dietary habits and academic achievement (p = 0.064). The study concluded that dietary habits were not meaningfully connected to academic achievement among students in this case. It appears that academic performance is more impacted by other elements such as motivation to learn, support from family, and the educational environment. However, maintaining a healthy diet continues to be essential for fostering the health and cognitive abilities of adolescents.
Effect of the Dengue Ranger Educational Board Game on Elementary School Students' Knowledge of Aedes aegypti Breeding Sites and 3M-Plus Practices Putu Ari Wirya Pratama; Adnanto Wiweko; Wayan Sulaksmana Sandhi Parwata; Titi Pambudi Karuniawaty
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12760

Abstract

Dengue hemorrhagic fever (DHF) remains a major public health problem, requiring effective mosquito breeding site control through the 3M-Plus program involving community participation, including elementary school students. This study aimed to compare the effectiveness of the Dengue Ranger educational board game and the Ministry of Health leaflet in improving students' knowledge of Aedes aegypti breeding sites and 3M-Plus practices. A quasi-experimental study with a non-equivalent control group design was conducted among 213 students from grades 3–6 at SD Negeri 37 Ampenan. Participants were selected using cluster sampling and assigned to the board game group (n = 108) or the leaflet group (n = 105). Knowledge was assessed using a validated questionnaire before the intervention, immediately after, and seven days later. Data were analyzed using the Wilcoxon signed-rank test and Mann–Whitney U test. Knowledge scores increased significantly in both groups (p < 0.05). The mean score increased from 10.50 to 12.44 in the board game group and from 10.79 to 12.05 in the leaflet group. The board game demonstrated significantly greater improvement than the leaflet (p < 0.05). However, no significant difference was observed in knowledge retention after seven days (p > 0.05). These findings indicate that the Dengue Ranger educational board game is more effective than leaflets in improving elementary school students' knowledge of Aedes aegypti breeding sites and 3M-Plus practices, while both media provide comparable short-term knowledge retention.
The Potential of Probiotics for Modulating The Gut-Brain Axis to Enhance Cognitive Function: A Narrative Review Farhan Aimarsa Latuconsina; Ahsanal Kasasiah
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12768

Abstract

Cognitive decline is an important health issue because it is closely linked to chronic inflammation, oxidative stress, impaired intestinal barrier function, and microbial imbalance, all of which accelerate neuronal aging and increase the risk of neurodegenerative diseases. This article aims to review and analyze the biological mechanisms through which probiotics modulate communication between the digestive tract and the brain and how these mechanisms relate to cognitive outcomes. This review discusses key mechanistic pathways reported in the literature, including enhanced production of neurotransmitters such as gamma aminobutyric acid, serotonin, and dopamine; increased short chain fatty acids; improved integrity of the intestinal barrier and the blood–brain barrier; reduced inflammatory activity; increased neurotrophic factors; and regulation of physiological stress responses. Synthesis of the seven included studies shows that probiotics improve cognition through interconnected pathways that support memory performance, synaptic plasticity, and mood stability, and may prevent cognitive impairment associated with aging, inflammation, or postoperative stress. The implications of these findings suggest that probiotics hold considerable potential as a supportive approach for brain health, although their effectiveness depends on strain selection, dose, and duration. This article provides a comprehensive overview of mechanistic consistency across studies and offers a foundation for future research aimed at identifying optimal probiotic strategies to enhance cognitive function.
Ethnobotanical Study of Forest Tuber Plants as Local Food Resources in Sonraen, Indonesia Nur Aini Bunyani; Olivia Jihan Stifani Bait; Maya F. Roman
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12770

Abstract

Forest tuber plants are important non-timber forest products that contribute to local food security and the preservation of traditional knowledge in rural communities. However, the use of these indigenous food resources has declined due to changing dietary patterns and limited documentation of ethnobotanical knowledge. This study aimed to identify forest tuber species used as local food resources and describe their traditional processing practices in Sonraen Village, South Amarasi District, Kupang Regency, Indonesia. The research was conducted from 1–28 February 2026 using a descriptive ethnobotanical approach. Data were collected through field observations, exploration surveys, semi-structured interviews, documentation, and plant specimen identification. Five forest tuber species were identified: Dioscorea esculenta L., Colocasia esculenta L., Canna edulis Kerr (red and white varieties), and Dioscorea alata L. Dioscorea esculenta, Colocasia esculenta, and Dioscorea alata showed the highest citation frequency (20%), whereas white Canna edulis had the lowest (8%). Community knowledge of forest tuber utilization was categorized as good and has been transmitted across generations as part of local wisdom. Traditional processing includes washing, peeling, cutting, and boiling the tubers over wood-fired stoves before consumption as staple foods or rice substitutes. These findings demonstrate the potential of forest tubers as alternative local food resources and provide baseline data for developing food diversification programs based on local wisdom, while supporting biodiversity conservation and the sustainable management of non-timber forest products. Further studies on nutritional composition, cultivation, and value-added processing are recommended to promote their broader utilization.
Overview of Triglyceride Levels and Estimated VLDL in Atherosclerosis Development among Patients over 50 Years Mohamad Zaul Haq; Bekti Mastiadji; Subur Wibowo
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12789

Abstract

Atherosclerosis is a chronic arterial disease caused by disorders of lipid metabolism, leading to the formation of atherosclerotic plaques. Elevated triglyceride levels are associated with increased production of Very Low-Density Lip oprotein (VLDL), which plays an important role in the process of atherogenesis and contributes to an increased risk of cardiovascular disease. Therefore, the measurement of triglyceride levels and the estimation of VLDL are important for the early detection of atherosclerosis risk, particularly in patients aged over 50 years. This study aimed to describe triglyceride levels and VLDL estimation in relation to atherosclerosis formation among patients aged over 50 years at QIM Batang Hospital. This study employed a descriptive research design involving 27 patients aged over 50 years. Triglyceride levels were measured using the enzymatic colorimetric GPO-PAP method with a chemistry analyzer, while VLDL levels were estimated using the Friedewald formula (VLDL = triglycerides/5). Data were analyzed descriptively and presented as frequency distributions and percentages. The laboratory results showed that normal triglyceride levels were found in 10 respondents (37.04%), borderline-high triglyceride levels in 10 respondents (37.04%), and high triglyceride levels in 7 respondents (25.92%). High estimated VLDL levels were observed in 17 respondents (62.96%), whereas normal estimated VLDL levels were found in 10 respondents (37.04%). These findings indicate that most patients aged over 50 years had elevated estimated VLDL levels, suggesting a potential increase in the risk of atherosclerosis development.
Codon Optimized MMLV Reverse Transcriptase Expression and Functional Evaluation in Escherichia coli Elsa Alfiyanti; Andani Eka Putra; Rita Maliza; Alponsin Alponsin
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12798

Abstract

Dependence on imported reverse transcriptase (RT) enzymes remains a challenge for the development of molecular diagnostic reagents, particularly in developing countries. This study aimed to design, express, purify, and functionally evaluate a recombinant Moloney Murine Leukemia Virus reverse transcriptase (MMLV-RT) as a candidate locally produced molecular biology reagent. A codon-optimized synthetic MMLV-RT gene was cloned into the pET-21a(+) expression vector and transformed into Escherichia coli BL21 (DE3). Recombinant protein expression was induced using IPTG, followed by purification using Ni²⁺-NTA affinity chromatography and characterization using SDS-PAGE. Functional activity of the recombinant enzyme was evaluated through reverse transcription of RNA templates followed by conventional PCR amplification. The optimized MMLV-RT gene was successfully expressed in E. coli BL21 (DE3), producing a recombinant protein band at approximately 55.4 kDa. The highest protein yield was obtained after overnight induction, reaching 3.385 mg/mL. Purification resulted in a dominant protein band corresponding to the expected molecular weight of MMLV-RT. Functional evaluation demonstrated that recombinant MMLV-RT successfully generated specific PCR amplicons with performance comparable to commercial reverse transcriptase without detectable non-specific amplification. These findings indicate that recombinant MMLV-RT produced in E. coli BL21 (DE3) retains functional reverse transcriptase activity and has potential for further development as an alternative locally produced reagent for molecular diagnostic applications.  
Relationship Between C-Reactive Protein Levels and Leucocytes Counts in Typhoid Fever Pediatric Patients Hari Saktiningsih; Nurdiana
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12813

Abstract

Typhoid fever was an infectious disease caused by Salmonella enterica serovar Typhi and Enteritidis. Laboratory tests most commonly performed in cases of typhoid fever included leukocyte count and C-reactive protein (CRP) measurement. Leukocytes played a role in the immune response to infection, while CRP increased as a result of the inflammatory response and was therefore used as an indicator of disease activity. This research intended to examine the correlation amongst C-reactive protein (CRP) levels and leukocyte count in pediatric patients with typhoid fever. This was an observational analytic descriptive study with a cross-sectional design. The study sample consisted of CRP levels and leukocyte count results obtained from the medical records of 84 pediatric patients aged 6 to 17 years diagnosed with typhoid fever at RSIA Brawijaya Duren Tiga during the period of July to December 2025, selected utilizing a purposive sampling technique. The findings of univariate and bivariate analyses showed that most pediatric typhoid patients were female, totalling 48 (57%) children, and the longest duration of fever was 7 days, observed in 53 (63%) children. The most common CRP finding was abnormal levels in 46 (55%) children, with the highest level reaching 168.80 mg/L. The leukocyte count was most commonly within the normal range in 44 (52%) children. Correlation test results indicated a significant correlation amongst CRP levels and leukocyte count, with a moderately strong positive correlation, as evidenced by a significance value of 0.002 and a correlation coefficient of r = 0.326.
Macroinvertebrates as Bioindicators of Water Quality in Karang Beach, Bali Gede Bayu Hendra Adi Putra; Rafi Radithya; Putu Anggi Handaresta Dewi; Revalina Aprilia; Made Dendy Pratama
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
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.v26i3.12825

Abstract

Karang Beach is a shallow water with a sandy substrate mixed with coral fragments and seagrass beds that support the life of benthic organisms. This study aims to determine the water quality at Karang Beach using macroinvertebrates as bioindicators. Sampling was conducted on November 1 and 25, 2025, using field survey methods (in situ) and laboratory analysis (ex situ). Water quality parameters measured included temperature, pH, turbidity, and current velocity. The measurement results showed relatively stable water conditions with an average temperature of 25.5°C, pH 8.1, and turbidity ranging from 3.3–4.8 NTU. The macroinvertebrates found came from the families Toxopneustidae, Grapsidae, and Holothuriidae. Analysis using the Family Biotic Index (FBI) at stations 1 to 4 showed that the water quality at Karang Beach was in a moderately stressed to poor condition, characterized by the dominance of organisms tolerant to environmental disturbances.

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