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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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Association Between Posyandu’s Role in Maternal Nutrition Monitoring and Stunting in Puyung Latifa, Nindy Citra; Nurbaiti, Lina; Hasby, Amelia Ramdani
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): Oktober-Desember
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.v25i4.10304

Abstract

Stunting is a health issue, particularly in poor nations such as Indonesia. One factor that contributes to stunting is mothers' nutritional status during pregnancy. Integrated Health Posts (Posyandu) monitor pregnant women's nutritional status by assessing mid-upper arm circumference (LILA), hemoglobin (Hb) levels, and maternal compliance with iron supplementation (TTD). The purpose of this study is to examine the association between Posyandu's role in monitoring pregnant women's nutritional status and the prevalence of stunting at the Puyung Community Health Center in Central Lombok Regency. This is an analytical correlation study conducted in a cross-sectional design. The sampling method was stratified random sampling. Data was collected using the KIA Handbook and questionnaires. The chi-square test was utilized while analyzing bivariate data. Of the 90 responders, 8 (8.9%) had low nutritional status during pregnancy, and 49 (54.4%) had stunted toddlers at the Puyung Community Health Center in Central Lombok. The bivariate test using the chi-square method yielded a p-value of 0.791 (p > 0.05), indicating that there is no significant relationship between maternal nutritional status during pregnancy and the incidence of stunting in the working area of Puyung Health Center, Central Lombok Regency. The study concludes that there is no significant association between the involvement of integrated health posts (Posyandu) in monitoring maternal nutritional status during pregnancy and the prevalence of stunting in Puyung Health Center's operational area, Central Lombok Regency.
Utilization of Posyandu Services and its Relationship with Stunting in 6–24-Month Old Children Nurmawaddah, Intan; Nurbaiti, Lina; Paramaiswari, Nurul Firdausi
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): Oktober-Desember
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.v25i4.10305

Abstract

Stunting is still a serious public health concern in Indonesia, especially in places with poor access to medical care. Stunting risk is thought to be significantly decreased by using Posyandu services, which include exclusive breastfeeding, full basic immunization, and appropriate reporting in the Maternal and Child Health (KIA) Book. Ninety respondents were chosen by stratified random sampling for this cross-sectional observational analytical study. Bivariate statistical analysis was conducted to examine the relationships between exclusive breastfeeding, basic immunization, and KIA Book completeness with stunting. The results showed no significant association between exclusive breastfeeding and stunting (p = 0.687), basic immunization and stunting (p = 0.079), or KIA Book completeness and stunting (p = 0.665). Although immunization coverage was higher among stunted children (93% versus 80%) and KIA Book completeness was high in both groups (98% in stunted versus 96% in non-stunted), these differences were not statistically significant. In conclusion, exclusive breastfeeding, basic immunization, and KIA Book documentation were not significantly associated with stunting in children attending the Puyung Health Center, Central Lombok Regency. Further studies are recommended to explore the roles of nutrition, parenting practices, and socioeconomic factors in the occurrence of stunting.
Analysis of Mercury Heavy Metal Content in Tilapia (Oreochromis niloticus) From Rawa Taliwang Lake Khairuddin, Khairuddin; Yamin, M.; Kusmiyati, Kusmiyati; Sedijani, Prapti
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): 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.v25i3.10331

Abstract

This study aims to determine the levels of heavy metal mercury (Hg) in the bodies of Tilapia (Oreochromis niloticus) fish taken from Lake Rawa Taliwang to enrich the material in Ecotoxicology. This study is particularly useful in protecting consumers from heavy metal contamination when consuming fish. This study was conducted at Lake Rawa Taliwang, located in West Sumbawa. There were two separate stations in the study, namely on the east and west sides of the lake. Tilapia (Oreochromis niloticus) fish were caught using gill nets. Three to four fish samples were taken from each station. Each fish sample was then placed in a plastic bag and stored in a sample box. The research samples were then analyzed at the West Nusa Tenggara Health Testing and Calibration Laboratory. Data analysis was carried out by taking fish muscle tissue and analyzing the heavy metal content of Hg using an Atomic Absorption Spectrophotometer (AAS). The wet digestion stage of sample digestion is the process of degrading organic material in the sample using a strong acid, namely HNO3, as a digesting agent. The data obtained is the heavy metal Hg content in ppm (parts per million). The next stage is to process the obtained Hg concentration descriptively and then display it in a table according to the AAS results. The conclusion of this study was that the heavy metal Hg content in Tilapia (Oreochromis niloticus) originating from Lake Rawa Taliwang to enrich the Ecotoxicology material ranged from 0.044 to 0.086 ppm.
Effect of Biochar and Various Organic Fertilizer Combinations on Growth, Yield of Mustard Green (Brassica juncea L.), and Soil Chemical Properties of Inceptisol Alfitriani, Pipi; Mulyati, Mulyati; Jaya, Dori Kusuma
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): Oktober-Desember
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.v25i4.10073

Abstract

Mustard green (Brassica juncea L.) is one of the important leafy vegetables cultivated in tropical regions, yet its productivity is often constrained by the low fertility of Inceptisol soils. The application of organic amendments such as biochar and various animal manures has been widely reported to improve soil fertility and plant performance. Therefore, this study aimed to evaluate the effect of biochar combined with different types and dosages of organic fertilizers on the growth, yield of mustard green (Brassica juncea L.), and the chemical properties of Inceptisol soil. The experiment was conducted using a Completely Randomized Design (CRD) with seven treatments and three replications, resulting in 21 pots. The results showed that K4 (biochar 10 t ha⁻¹ + swallow manure 20 t ha⁻¹ + NPK 150 kg ha⁻¹) achieved the best growth and yield of mustard green by significantly increasing plant height, number of leaves, leaf area, fresh and dry biomass, as well as improving soil chemical properties such as pH, organic C, total N, available P, and available K. In conclusion, combination of biochar and organic fertilizers, especially with swallow manure, proved effective to enhance the soil fertility of Inceptisol for supporting growth and yield of mustard green. Based on the results, further research should be conducted using different dosages of swallow manure to obtain the optimal growth of mustard green or other vegetables in relation to reducing the use of inorganic fertilizers.
Feeding Behavior and Food Preferences of Bornean Orang utan (Pongo pygmaeus) at Gembira Loka Zoo Yogyakarta Jati, Fajar Sanintan; Riawan, I Made Oka; Syah, Moh Jafron
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): Oktober-Desember
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.v25i4.10098

Abstract

Feeding management is crucial in the care of orangutans in captivity, particularly the understanding of individual feeding preferences as a key factor in animal welfare. This study aims to review feeding management, identify preferences, and analyze the feeding behavior of Bornean orangutans (Pongo pygmaeus) at Gembira Loka Zoo, Yogyakarta. Observations were conducted on four accommodation individuals and two display individuals from May to July 2025, focusing on feeding position, technique, timing, and activity. The method used was descriptive observational with scan sampling from 08:00 to 15:00 local time, along with recording of feed types, weights, and leftovers. Preferences were analyzed using Jacobs’ Index (Di), categorized as highly preferred, preferred, less preferred, and not preferred, along with palatability assessment. Results showed that the main diet consisted of vegetables (64.90%), fruits (18.47%), and tubers (15.32%), with melon, tubers, and corn being the most preferred foods, while pumpkin and bok choy were less favored. Feeding behavior varied according to age, sex, social status, and activity level, dominated by sitting positions and techniques that demonstrated fine motor skills as well as adaptation to artificial environments. These findings are particularly beneficial for feeding management at Gembira Loka Zoo to minimize leftovers based on individual preferences, while also serving as a reference for improving animal welfare and the effectiveness of other ex situ conservation efforts.
The Growth of Lemna Minor and Pistia Stratiotes in Batulayang Landfill’s Leachate Perdana, Aurendyo Yuscel; Zakiah, Zulfa; Rusmiyanto, Elvi
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): Oktober-Desember
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.v25i4.9513

Abstract

Lemna minor and Pistia stratiotes are plants that can be used to degrade haevy metal pollutants iron (Fe) and lead (Pb) present in aquatic environments and can imprave water quality. The purporse of this study was to determine the best combination between L. minor and P. stratiotes in improving leachate water quality. This study uses a Completely Randomized Design (CRD) with five treatment levels with 3 replications each. The data obtained were then analyzed using descriptive.The results showed that the best plant combination in improving leachate water quality and capable of absorbing heavy metals iron and lead was L1P3 with a percentage reduction of heavy metals iron and lead of 98,2% and 85 % respectively as a result L. minor and P. stratiotes after treatment on Batu Layang Landfill leachate experienced an increase in biomass and chlorophyll content, as well as being able to reduce lead and iron levels. The results of this study are in line with Minister of Environment Regulation of the Republic of Indonesia Number 59 of 2016 concerning quality standards for leachate from business premises or final disposal sites.
The Effect of Vitamin C Addition on the Antibacterial Activity of Pseudomonas aeruginosa in the Ethyl Acetate Fraction of Green Tea Leaves Rayes, Norina Shaumy Putri; Permatasai, Lina; Mukhlshah, Neneng Rachmalia Izzatul; Octora, Metta; Arnawati, Ida Ayu; Jannah, Fathul
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): Oktober-Desember
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.v25i4.9657

Abstract

Pseudomonas aeruginosais a major antibiotic-resistant pathogen frequently associated with hospital-acquired infections posing significant treatment challenges. This study aimed to evaluate the antibacterial activity of the ethyl acetate fraction of green tea (Camellia sinensis L.) enriched with vitamin C against Pseudomonas aeruginosa. The ethyl acetate fraction obtained from 96% ethanol maceration was tested at concentrations of 12,5-200 mg/mL both with and without vitamin C using the disk diffusion method and compared to aztreonam as a positive control. Results showed that vitamin C enrichment increased the inhibition zone from 12,5 mm to 13,8 mm at 200 mg/mL, while aztreonam produced the largest inhibition zone at 20,17 mm. The vitamin C-enriched formulation also maintened antibacterical activity more effectively over a 5-15 day storage period. Vitamin C is believed to stabilize the primary antimicrobial compound epigallocatechin gallate (EGCG) by preventing its oxidation. These findings support the potential of vitamin C-enriched green tea extract as an adjunctive therapy against Pseudomonas aeruginosa infections. Further development of topical or systemic formulations is recommended for managing resistant bacterial infections.
Differences in Scube1 and Scube2 Gene Expression in Type II Diabetes Mellitus Patients with Dyslipidemia Saputri, Rahmi Agu; Ali, Hirowati; Tjong, Djong Hon; Anggraini, Debie; Yarni, Sisca Dwi
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): Oktober-Desember
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.v25i4.9875

Abstract

The Scube1 gene is expressed in atherosclerosis (plaque buildup in blood vessels), while Scube2 is expressed in DIT (Diffuse Intimal Thickening) which is used to describe diffuse thickening of the intima of blood vessels. This study aims to determine the differences in the expression of the scube1 gene in blood samples of type II DM patients with dyslipidemia and type II DM with non-dyslipidemia and differences in the expression of the scube2 gene in blood samples of type II DM patients with dyslipidemia and type II DM with non-dyslipidemia. With a comparative cross-sectional research method, the sample size of this study was determined based on the Lameshow hypothesis test formula which obtained 18 blood samples of type II DM with dyslipidemia, and 18 blood samples of type II DM with non-dyslipidemia. Blood samples of type II DM patients with dyslipidemia and blood samples of type II DM patients without dyslipidemia showed significantly different expression of the scube1 gene, with a p-value of 0.000. Similarly, blood samples from type II DM patients with dyslipidemia and those from type II DM patients without dyslipidemia showed a significant difference in scube2 gene expression (p = 0.001). Thus, it can be said that the expression of the Scube1 and Scube2 genes is significantly influenced by the complications of diabetes mellitus with dyslipidemia. This happens because it is believed that hyperglycemia in type II DM contributes to endothelial cell dysfunction, which occurs prior to blood vessel damage and results in progressively more severe blood vessel problems. Along with hyperglycemia, type II diabetes also results in dyslipidemia, an alteration in the normal lipid profile. Both dyslipidemia and hyperglycemia contribute to macrovascular and microvascular problems in type II diabetes.
Genetic Diversity and Species Identification of Unhatched Sea Turtle Eggs from Southern Bali Hatcheries Dewana, I Gede Jose; Pertiwi, Ni Putu Dian; Yuliastuti, Yuliastuti; Yusmalinda, Ni Luh Astria; Luh Putu Candra Apriliani; Savitri, Ni Komang Rossa Sri; Rachmawati, Rita; Sembiring, Andrianus
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): Oktober-Desember
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.v25i4.9897

Abstract

Genetic data of sea turtles in Southern Bali remains limited as most previous studies rely on adult or live samples, while unhatched eggs are rarely utilized as a genetic resource. This study aims to identify the species and genetic diversity of unhatched sea turtle eggs from conservation sites in Southern Bali using mitochondrial control region. A total of six non-viable eggs were analyzed through DNA extraction, PCR, sequencing, and data analysis using MEGA 11, NCBI BLAST, and DnaSP v6. The identification results revealed that all samples belonged to the species of Lepidochelys olivacea (olive ridley turtle), with sequence similarity ranging from 99.54% to 100% and query coverage of 89% to 99% compared to reference data from GenBank. Phylogenetic analysis showed that all samples clustered within the same clade, with intraspecific genetic distances ranging from 0 to 0.008. Genetic diversity analysis revealed a haplotype diversity (Hd) of 0.86667 and nucleotide diversity (π) of 0.00306, with a total of four distinct haplotypes and six polymorphic sites. These findings indicate that unhatched sea turtle eggs still contain viable genetic material for analysis and suggest that Lepidochelys olivacea is the dominant nesting species found in Southern Bali. This study carries important implications for advancing conservation policy, enhancing habitat protection, minimizing inbreeding risks, and strengthening the use of species identification through forensic genetics.
Alternative Seedling Media Using Dicranopteris linearis and Rice Husk Charcoal for Acacia mangium Astuti, Ria; Pamoengkas, Prijanto; Srena, Mona Fhitri; Zuhriansah, Alfi Laila; Rahmah, Hanifa; Kusuma, Yosie Syadza; Br Lubis, Rizky Febriana
Jurnal Biologi Tropis Vol. 25 No. 4 (2025): Oktober-Desember
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.v25i4.9908

Abstract

Seedling quality contributes significantly to the development of industrial forest plantations. This study assessed Dicranopteris linearis (Resam) and rice husk charcoal mixtures as an alternative nursery media for Acacia mangium Willd. seedlings. The study was carried out using a Completely Randomized Design, and the data were analyzed using ANOVA. Five mixtures of resam and rice husk charcoal were tested: A (100% control), B (80%:20%), C (70%:30%), D (60%:40%), and E (50%:50%). The ratio of 70%:30% yielded the best performance, with a mean height of 12.84 cm, fresh weight of 4.63 grams, dry shoot weight of 1.53 grams, and a Seedling Quality Index (SQI) of 0.0018. These findings highlight mixed media C as the most effective composition and confirm the potential of resam and rice husk charcoal mixture as an effective and sustainable nursery media for industrial forest plantation.

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