Indenesian Journal of Tropical Biology
Indonesian Journal of Tropical Biology (IJTB) is a scientific journal that accommodates the results of basic and applied research in the field of tropical biology. The focus of this journal covers various aspects of biology such as ecology, biodiversity, conservation of biological resources, biotechnology, physiology, genetics, zoology, botany, and microbiology, especially those related to tropical ecosystems. IJTB aims to be a scientific communication forum for historians, researchers, and practitioners in developing science and its application to support tropical ecosystems and biological resources. Published manuscripts can be research results and results that have used scientific methodology standards. Therefore, the Indonesian Journal of Tropical Biology (IJTB) is a peer-reviewed journal published by the Siti Widhatul Faefa Foundation, which is published three times a year (January-April, May-August, September-December) in online and print versions. Focus and Scope: The Indonesian Journal of Tropical Biology (IJTB) is a scientific journal that publishes original research articles, literature reviews, and brief communications in the field of tropical biology. This journal focuses on the exploration, conservation, and development of biological sciences related to biodiversity, ecology, and the tropical environment, particularly in Indonesia and other tropical regions. The scope of IJTB topics includes, but is not limited to: Tropical Life Biology Covers research in zoology, botany, mycology, and tropical microbiology, focusing on the diversity, biology, and ecological roles of tropical organisms. Ecology and Conservation Includes studies on population dynamics, tropical ecosystems, endemic and endangered species, and evidence-based conservation practices in tropical environments. Biotechnology and Molecular Biology Focuses on the application of biotechnology, genomics, and molecular biology in the utilization, improvement, and conservation of tropical biological resources. Taxonomy and Systematics Encompasses the discovery, description, identification, and classification of tropical organisms, including phylogenetics and evolutionary relationships. Ecophysiology and Adaptation Investigates physiological functions, environmental adaptations, and response mechanisms of tropical organisms to environmental stressors. Environmental Management and Tropical Natural Resources Studies on sustainable management, ecosystem services, climate change mitigation, and restoration strategies of tropical natural resources. Tropical Biomedical and Health Sciences Research on natural compounds with therapeutic potential, tropical infectious diseases, ethnopharmacology, public health, and biomedical applications related to tropical environments. Biochemistry and Biophysics of Tropical Organisms Covers the biochemical pathways, structural biology, bioenergetics, and biophysical mechanisms that underlie the physiology and molecular functions of tropical organisms. Environmental and Ecosystem Biology Focuses on bioenvironmental processes, ecotoxicology, pollution impacts, bioremediation, and interactions among biological, chemical, and physical components of tropical ecosystems Resources The journal is open to articles in Indonesian and English, and is aimed at academics, researchers, policy makers, and practitioners engaged in the field of tropical biology and the environment. All manuscripts will go through a peer review process to ensure their quality and scientific contribution.
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<![CDATA[Strategy of Management of Pavo Muticus linnaeus Population in Bekol and Bama Savana of Baluran National Park: Strategi Pengelolaan Populasi Pavo Muticus linnaeus di Savana Bekol dan Bama Taman Nasional Baluran ]]>
<![CDATA[Ilham Wijayanto Oktarino]]>
<![CDATA[ Indonesian Journal of Tropical Biology Vol. 1 No. 2 (2025): August 2025 ]]>
Publisher : <![CDATA[Yayasan Siti Widhatul Faeha ]]>
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<![CDATA[This study aims to determine the management strategies and populations of green peacocks in bekol savanna and Bama savanna. The method of collecting data for the population is done by the Line Transect method which uses a path length of 2 Km with an unspecified path width and for spatial distribution carried out by stabilizing the coordinate points in each encounter and measuring the encounter distance and angle of encounter. And then it is managed by Geographic Information System. Whereas the strategy for optimizing the management of green peacock populations is used by in-depth interview method and Focus Group Disscustion (FGD) then it are analyzed descriptively, quantitatively. The results of the study carried out that population estimation was found for 27 individuals in Bekol savanna and 38 individuals in Bama savanna and having different sex ratio production at Bekol savanna had a ratio of male and female, which are 1: 2 and in Bama savanna had a 1: 4 sex ratio, and had a percentage of age structures dominated by adolescents from the two observation pathways, while the strategy for efforts to optimize the management of green peacock populations is obtained by the management of adaptive green peacock habitat to conduct regional management by increasing workforce personnel and maximizing cooperation in education and research from various partner institutions.]]>
<![CDATA[Arenga Palm Harvesting and Processing Practices by the Community of Kekait Village, West Lombok: Praktik Pemanenan dan Pengolahan Pohon Aren oleh Masyarakat Desa Kekait, Lombok Barat ]]>
<![CDATA[Rizki Sukarman Sawaka]]>;
<![CDATA[Adelia Zahra]]>;
<![CDATA[Regina Natasya Putri]]>
<![CDATA[ Indonesian Journal of Tropical Biology Vol. 1 No. 2 (2025): August 2025 ]]>
Publisher : <![CDATA[Yayasan Siti Widhatul Faeha ]]>
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<![CDATA[This study aims to describe the traditional practice of harvesting and processing palm trees (Arenga pinnata) by the people of Kekait Village, West Lombok, as well as examining the cultural values and ethnobotanical knowledge that accompany them. The research method used is qualitative with an ethnobotanical approach, through participatory observation, in-depth interviews, and field documentation. The results of the study show that palm trees are still abundant and scattered on land owned by residents and wild land. The sap tapping technique is carried out through the stages of mantokin and bêgéyong, as well as the use of traditional tools such as bamboo, belakas, and laru wood as natural bioinhibitors. The process of processing sap into ant sugar is carried out without chemicals, reflecting local wisdom in maintaining the quality and sustainability of the environment. It was also found that human behavior and emotions can affect crop yields, which suggests an ecological-spiritual relationship between humans and trees. These findings confirm the importance of preserving local knowledge as part of biocultural conservation and sustainable management of natural resources.]]>
<![CDATA[Bioconservation Management of Protected Forest Areas: A Case Study in the West Rinjani Forest Management Unit: Pengelolaan Biokonservasi Kawasan Hutan Lindung: Studi Kasus di Unit Pengelolaan Hutan Rinjani Barat ]]>
<![CDATA[Raden Dendy Anugrah]]>;
<![CDATA[Haeki Manzis]]>;
<![CDATA[Inda Nur Cahyani]]>;
<![CDATA[Fitri Sandya Arini]]>
<![CDATA[ Indonesian Journal of Tropical Biology Vol. 1 No. 2 (2025): August 2025 ]]>
Publisher : <![CDATA[Yayasan Siti Widhatul Faeha ]]>
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<![CDATA[Sustainable forest management is essential to maintaining ecological integrity and improving community welfare. This study aims to assess the performance of the West Rinjani Forest Management Unit (KPHL Rinjani Barat) in implementing conservation-based forest governance. A descriptive qualitative approach was applied, involving field observations, semi-structured interviews with key stakeholders, and document analysis. The data were analyzed using the Miles and Huberman interactive model through data reduction, data display, and conclusion drawing. The results indicate that KPHL Rinjani Barat achieved the highest performance score (3) across all six evaluation indicators, including competency standards, operational consistency, planning effectiveness, and implementation of forest utilization and protection. Despite this, only 20% of the long-term forest management plan (RPHJP) could be executed due to limited financial support. The study concludes that while institutional performance is strong in planning and community facilitation, funding constraints hinder full implementation. This highlights the urgent need for policy reform in budgeting systems to strengthen forest governance at the local level. Scientifically, this study supports the integration of bio-conservation principles into decentralized forest management and recommends increased state and stakeholder investment to ensure ecological sustainability and socio-economic benefits for forest-dependent communities.]]>
<![CDATA[Detection of Aerobic Bacterial Contamination in Frozen Chicken Meat Using the TPC (Total Plate Count) Method: Deteksi Kontaminasi Bakteri Aerob pada Daging Ayam Beku Menggunakan Metode TPC (Total Plate Count) ]]>
<![CDATA[Annisa Alifiya Mutmainnah]]>;
<![CDATA[Lili Suharli]]>;
<![CDATA[Kusdianawati]]>;
<![CDATA[Ardiyanto Chandra Wijaya]]>
<![CDATA[ Indonesian Journal of Tropical Biology Vol. 1 No. 2 (2025): August 2025 ]]>
Publisher : <![CDATA[Yayasan Siti Widhatul Faeha ]]>
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<![CDATA[This study aims to evaluate the biological quality of frozen chicken meat through pH, early spoilage detection, and total microbial contamination, supporting food safety monitoring. According to SNI No. 01-6366 (2000), the maximum microbial contamination limit (BMCM) for chicken meat is 1 × 10⁴ CFU/g. The study utilized pH tests with litmus paper, the Eber test with Eber reagent, and total plate count (TPC) using the MC-Media Pad ACplus™ method, involving buffer preparation, serial dilution, and colony counting. Results showed all three samples had a normal pH range (5–6), meeting the standard. The Eber test indicated all samples were negative for spoilage, as no NH₄Cl compound was formed. However, TPC results revealed that sample A1 (1 × 10⁴ CFU/ml) met the microbial threshold, while samples A2 (3 × 10⁵ CFU/ml) and A3 (5 × 10⁵ CFU/ml) exceeded the BMCM after 48 hours. The findings suggest that although pH and spoilage indicators were within normal limits, microbial load in some frozen chicken samples surpassed safety thresholds. These results underscore the importance of strict cold chain management and routine microbial testing to ensure food safety and consumer health.]]>
<![CDATA[Analysis of Factors Causing Garbage Accumulation in The Tanjung Karang Coastal Area: Analisis Faktor Penyebab Penumpukan Sampah di Wilayah Pesisir Tanjung Karang ]]>
<![CDATA[Irtiqa Ulya]]>;
<![CDATA[Valhalla Yudha Pramana]]>;
<![CDATA[Syaum Sahruramadhan]]>;
<![CDATA[Nadia Tarissya Pratiwi]]>
<![CDATA[ Indonesian Journal of Tropical Biology Vol. 1 No. 2 (2025): August 2025 ]]>
Publisher : <![CDATA[Yayasan Siti Widhatul Faeha ]]>
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<![CDATA[Tanjung Karang Beach in Mataram City faces serious waste accumulation due to rising human activities, especially tourism. This study aims to identify the types and sources of waste and analyze the main contributing factors. A qualitative approach was used through field observations, interviews, and literature reviews. The results show that inorganic waste, particularly single-use plastics and styrofoam, dominates the area. The main sources include tourist activities, river runoff, and marine debris. Using a Fishbone Diagram, four contributing factors were identified: (1) Machine limited infrastructure and budget; (2) Method irregular waste collection and weak implementation of the 3R principle; (3) Man low awareness and careless littering; and (4) Material inadequate trash bins. The study concludes that waste accumulation in Tanjung Karang is a multidimensional issue involving technical, behavioral, and institutional aspects. This research contributes to understanding coastal waste problems and recommends improving infrastructure, promoting community education, enforcing regulations, and strengthening collaboration between stakeholders to ensure sustainable coastal tourism.]]>
<![CDATA[The Implementation of a spatial model for developing a flood early warning system in the Kelep River Basin, Lombok, Indonesia: Implementasi model spasial untuk pengembangan sistem peringatan dini banjir di Daerah Aliran Sungai Kelep, Lombok, Indonesia ]]>
<![CDATA[Lalu Ade Sugiarta]]>;
<![CDATA[Arben Virgota]]>;
<![CDATA[Baiq Farista]]>;
<![CDATA[Astrini Widiyanti]]>
<![CDATA[ Indonesian Journal of Tropical Biology Vol. 1 No. 2 (2025): August 2025 ]]>
Publisher : <![CDATA[Yayasan Siti Widhatul Faeha ]]>
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<![CDATA[Indonesia, including in the Kelep Watershed, Lombok Island, flood disasters frequently occur. Land use changes and climate variability make this area more vulnerable to floods. This study aims to analyze the distribution and level of flood vulnerability and the dominant factors causing flood vulnerability in the Kelep Watershed. The method used was the weighting of six parameters, namely slope, landform, soil type, rainfall, land use, and river buffer, which were then overlaid using ArcGIS 10.8 software. The results showed that the highly flood-prone areas were spread across all sub-districts in the Kelep watershed, with the highest concentration in Sekotong, Lembar and Southwest Praya sub-districts. The three villages with the highest flood-prone areas are Candi Manik, Sekotong Tengah and Taman Baru. These areas require special attention as they often experience serious impacts due to flooding. Based on the validation test, the RMSE value of 5.95% indicates acceptable accuracy. The resulting flood vulnerability classification map can be used as a flood early warning system or basis for flood risk mitigation and is proposed to be implemented through cross-sector collaboration to improve preparedness and reduce disaster impacts.]]>
<![CDATA[Equitable Development Strategy for Lombok Island and Sumbawa Island in West Nusa Tenggara: Analisis Keadilan Pembangunan Berkelanjutan Berdasarkan Tujuan Pembangunan Berkelanjutan di Nusa Tenggara Barat ]]>
<![CDATA[Muhammad Satrio Ramadhan]]>
<![CDATA[ Indonesian Journal of Tropical Biology Vol. 1 No. 2 (2025): August 2025 ]]>
Publisher : <![CDATA[Yayasan Siti Widhatul Faeha ]]>
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<![CDATA[Regional inequality between Lombok and Sumbawa Islands in West Nusa Tenggara remains a persistent development challenge that requires collaborative strategies. This study aims to analyze equitable development strategies by integrating Implementation Theory with the Pentahelix Collaboration model. A qualitative case study design was employed, involving 25 purposively selected stakeholders from government, private sector, academia, community, and media. Data were collected through in-depth interviews, field observations, and document reviews, and analyzed thematically using NVivo 12 Plus, supported by Four Quadrant Analysis and Implementation Theory. The findings show that development disparities are rooted in unequal infrastructure distribution, dominance of tourism and services in Lombok, and dependence on mining in Sumbawa despite its vast agricultural and forestry resources. The analysis highlights four key dimensions: coherence through a shared equitable vision, cognitive participation via inclusive stakeholder collaboration, collective action in leveraging natural resources with cultural embeddedness, and reflective monitoring through participatory evaluation. The study concludes that equitable development in West Nusa Tenggara requires not only economic growth but also fair distribution of benefits, strengthened connectivity, and inclusive governance. Scientifically, this research reinforces the applicability of Implementation Theory in regional development studies and recommends adaptive, evidence-based policies that integrate local cultural values and multi-stakeholder collaboration for sustainable and just outcomes.]]>
<![CDATA[Growth and Survival of Mytilopsis adamsi During Larval to Early Juvenile Transition Under Different Salinity Conditions: Pertumbuhan dan Kelangsungan Hidup Mytilopsis adamsi Selama Transisi Larva ke Juvenil Awal pada Kondisi Salinitas yang Berbeda ]]>
<![CDATA[Dina Ahyani]]>;
<![CDATA[Alis Muhklis]]>;
<![CDATA[Bayu Priyambodo]]>
<![CDATA[ Indonesian Journal of Tropical Biology Vol. 1 No. 2 (2025): August 2025 ]]>
Publisher : <![CDATA[Yayasan Siti Widhatul Faeha ]]>
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<![CDATA[Mytilopsis adamsi, a small filter-feeding bivalve mollusk, has become an invasive species cultivated in Indonesia as natural feed for economically valuable crustaceans. This study determined optimal salinity levels for growth and survival of M. adamsi during larval to early juvenile transition. Using a completely randomized design, four salinity treatments (10, 20, 30, and 40 ppt) were tested with three replicates each. Larvae were reared for 28 days with Nannochloropsis sp. and Pavlova lutheri as feed, developing from 50.4 µm to 140.17 ± 6.12 µm. Treatments at 20 and 30 ppt demonstrated optimal performance with identical specific growth rates (SGR) of 3.90% per day. Survival rates showed no significant difference (p > 0.05) between treatments, ranging from 24.6% to 27.8%, with highest values at 40 ppt (27.8 ± 0.4%). Statistical analysis revealed a quadratic relationship for SGR (y = -0.0014x² + 0.0615x + 3.2576, R² = 0.8753) with theoretical optimum at 22.0 ppt. The optimal salinity range for M. adamsi cultivation is 20–30 ppt based on growth performance. These results provide baseline data for commercial cultivation protocols and environmental management strategies.]]>
