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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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Nanoemulsion of Cardamom Fruit Extract (Amomum compactum) and its Characterization Ina, Febi Rambu; Saragih, Horasdia
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): 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.v25i2.8902

Abstract

The development of medicinal materials from bioactive compounds of plants continues to be carried out. Various problems that occur in it continue to be overcome. Bioactive compounds of plants are known to be hydrophobic, including bioactive compounds from cardamom fruit, so that these compounds are difficult to deliver into the organs of the body. To overcome this problem, nanoemulsion techniques have been carried out. The purpose of this study was to produce nanoemulsions of bioactive compounds of cardamom fruit and to study their characteristics. Nanoemulsions of bioactive compounds of cardamom fruit have been synthesized using a microtube equipment system by utilizing the characteristics of the flow pattern of its liquid segment which is circulative forming a vortex in a very small size. The nanoemulsions obtained have a diameter ranging from 15.2 nm to 19.7 nm. The diameter increases when the mass of the bioactive compound concentrate of cardamom fruit is increased. The polydispersity index ranges from 0.341 to 0.637; the average electrophoretic mobility ranges from -0.000010 cm2/V.s to -0.000062 cm2/V.s and the zeta potential from -1.3 mV to -8.1 mV. From the results obtained, it shows that the obtained nanoemulsions have a relatively very small average diameter, their size distribution is relatively heterogeneous and the surface charge surrounding the nanoemulsions is negative. However, the zeta potential is still relatively small so that it has the potential to be less stable. Therefore, an effort to increase the magnitude of the zeta potential in the future needs to be done.
Diversity of Species and Morphometrics of Reptiles (Order Squamata) in The Utilization Block of The Kerandangan Tourism Area Ramadhan, Nuzul Rizki; Syaputra, Maiser; Wahyuningsih, Endah
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): 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.v25i2.8918

Abstract

This study aims to identify and analyze the diversity of reptiles from the order Squamata in the Kerandangan Nature Tourism Park, West Lombok Regency, West Nusa Tenggara Province, Indonesia, which has various habitat types, namely garden, secondary forest, riparian, and ecotone, influencing the distribution and adaptation of reptile species. The results showed that 11 species of reptiles from the order Squamata were found, consisting of 7 species of snakes and 4 species of lizards. The diversity, richness, and evenness indices of species varied across each habitat type, with the highest diversity index found in the riparian habitat (H’ = 1.64) and the lowest in the ecotone habitat (H’ = 1.28). The dominance index revealed that Dendrelaphis pictus dominated the ecotone habitat, while Gekko gecko dominated the garden habitat. Morphometric analysis showed variations in body size between species, with the reticulated python (Malayopython reticulatus) having the largest total length (375 cm) and the snail snake (Pareas carinatus) having the smallest size (47 cm). These results illustrate the adaptation of reptile species to diverse ecological conditions in the Kerandangan Nature Tourism Park. This study is expected to contribute to understanding biodiversity and the importance of reptile habitat conservation in the nature tourism park. Kerandangan Nature Tourism Park, located in West Lombok Regency, has abundant biodiversity, with reptiles from the order Squamata being an important part of its ecosystem.  This research is crucial to understanding the diversity, abundance, and distribution of reptiles in the Kerandangan Nature Tourism Park as part of conservation efforts that can provide valuable data and information for managing the area.
Efusi Pleura: Literature Review Supriantarini, Dita; Afifah, Fiza
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): 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.v25i2.8948

Abstract

Pleural effusion is an abnormal accumulation of fluid in the pleural space, which is the thin cavity between the pleural layers that surround the lungs. Globally, around 1.5 million patients are diagnosed each year, with the main causes being congestive heart failure, malignancy, and infection. The purpose of this article is to determine pleural effusion: a literature study. The method used is a literature review using several database journals taken from Google Scholar. Relevant keywords related to the title of the article are used in the search strategy. The results of the literature study obtained that pleural effusion is classified into transudate and exudate. The diagnosis of pleural effusion is made through anamnesis and physical examination. In addition, there are supporting examinations consisting of chest x-ray, chest ultrasound, chest CT scan, and pleural fluid analysis. Management in dealing with pleural effusion through pleural puncture (thoracentesis), thoracoscopy, conservative management (if the fluid is small), installation of water seal drainage, pleurodesis, complications and prognosis. In conclusion, pleural effusion can be diagnosed in 2 ways and by carrying out other supporting examinations.
Utilization of Hatchery Waste Egg Flour as a Protein Source for Catfish (Clarias gariepinus) Fry Assabri, Maulana Riski; Alim, Sahrul; Lumbessy, Salnida Yuniarti
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): 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.v25i2.8959

Abstract

Catfish (Clarias gariepinus) is one of the aquaculture commodities with high economic value. Its fast growth rate and broad environmental tolerance make it widely cultivated. This study aimed to analyze the growth performance of catfish (C. gariepinus) fry by using hatchery waste egg flour as a protein source in feed. The research employed an experimental method using a Completely Randomized Design (CRD) consisting of five treatments with three replications. Observed parameters included absolute weight, absolute length, specific growth rate (SGR), feed utilization efficiency (FUE), feed conversion ratio (FCR), and survival rate (SR). The results showed that adding hatchery waste egg flour had a substantial influence on absolute weight, SGR, FUE, and FCR, but not on absolute length or SR. The best treatment was the 50% substitution of fishmeal with hatchery waste egg flour, which resulted in an increase in absolute weight by 3.69 g, absolute length by 2.90 cm, SGR by 1.91%, and FUE by 59.30%. These findings indicate that hatchery waste egg flour can be used as an alternative protein source in feed for catfish fry.
Mangrove Crab (Scylla olivacea) Population in The Waters of The Mangrove Area, Sei Lepan Subdistrict, Langkat District, North Sumatera Damayanti, Ervina; Jayanthi , Sri; Wahyuni, Ayu
Jurnal Biologi Tropis Vol. 24 No. 4 (2024): 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.v24i4.7653

Abstract

Mangroves are a habitat for mangrove crabs, one of which is Scylla olivacea, which is a source of protein and has nutritional value and is a food commodity whose selling value increases every year. The aim of this research was to determine crab density, crab growth patterns and physical and chemical condition parameters. Determining the location of the station used purposive sampling at 3 observation research locations, at each observation location 10 traps were placed. The data analysis used is data on crab density, growth patterns and environmental physico-chemical factors. This research was conducted in August 2023. There were 18 Scylla olivacea crabs that were obtained at station 1, 6 (3 males, 3 females), station 2, 5 (1 female, 4 males), station 3, 7 (3 male, 4 female), with a density value of 1800 ind/ha. The growth pattern for male mud crabs is W = 0.0202x + L5.9649 with a value for females of W = 0.0243x L+5.8572, while at all observation stations W= 0.0191x+L 6.2536. So the growth pattern of Scylla olivacea is negative allometric. Environmental parameter data consists of temperature, salinity and pH. At salinity 10 0/00 - 20 0/00 and temperature ranging from 24 0 C- 27 0 C, pH ranges from 7.1-7.3.
Culture of Spiny Lobster in Multi-level Floating Net Cage System Integrated with Snubnose Pompano and Abalone Shells Junaidi, Muhammad; Diniarti, Nanda; Dwiyanti, Septiana; Diniariwisan, Damai; Sumsanto, Muhammad
Jurnal Biologi Tropis Vol. 25 No. 1 (2025): 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.v25i1.7955

Abstract

Modification of floating net cages (FNC) to multi-level floating net cages (MFNC) is one of the integrated cultivation options which is believed to be able to increase production capacity without increasing the horizontal area of ​​the cultivation area. Therefore, research was conducted with the aim of comparing the growth performance, survival and physiological behavior of lobsters cultivated in FNC and MFNC. The research method used was a field experiment with comparative analysis between lobster cultivation using the MFNC and FNC systems where each treatment was repeated 3 times. The parameters observed were growth performance, survival and physiological behavior of lobsters, growth and survival of    snubnose pompano and abalone as well as water quality. Data analysis was carried out using the paired sample t test.  The results of the research showed that there were no significant differences in the growth performance, survival and physiological behavior of lobsters reared using multi-level floating net cages and floating net cages (p > 0.05). Thus, the application of the multi-level floating net cage system in lobster cultivation is efficient in optimal use of space. Apart from that, the water quality of Ekas Bay is classified as suitable as a cultivation area for lobster, snubnose pompano and abalone, where cultivation activities using a multi-level net cage system do not have an impact on water quality, especially the parameters of temperature, pH, dissolved oxygen and salinity.
The Effect of IAA-Producing and Phosphate-Solubilizing Bacteria Isolated from Zea mays Rhizosfera on the Germination of Vigna sinensis L (Wulung Var.) Sari, Neti Kumala; Zulkifli, Lalu; Rasmi, Dewa Ayu Citra; Sedijani, Prapti
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): 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.v25i2.8521

Abstract

PGPR are beneficial bacteria that play a role in increasing plant growth and productivity through hormone synthesis and provision of dissolved nutrients that are readily absorbed by plant roots. This study aims to determine the effect of IAA-producing and phosphate-solubilizing bacteria from corn plants (Zea mays L.) on the germination of legume plants (Vigna sinensis L.) in vitro. Rhizosphere bacteria from corn plants were isolated from Tetebatu Village, Sikur District, East Lombok Regency. IAA production and phosphate solubilization tests were carried out qualitatively and quantitatively. Qualitative phosphate solubilization was carried out by measuring the clear zone formed on Pikovskaya solid media and quantitatively using a spectrophotometer method with a wavelength of 690 nm. The test of the effect of bacteria on the germination of Wulung variety long bean plants planted on modified Murphy media with parameters of plant height, root length, fresh weight and dry weight of plants for 5 days was then analyzed using One Way Anova. The results showed that 7 isolates were able to produce IAA and dissolve phosphate and 3 other isolates were only able to dissolve phosphate. The highest IAA production (29.17 ppm) was produced by isolate RJ5 on the 5th day of incubation. The highest phosphate solubilization (18.46 ppm) was produced by isolate RJ1 on the 8th day of incubation. The results of the analysis showed that the effect of IAA-producing bacteria and phosphate-solubilizing bacteria on the germination of long bean plants was significantly different for plant height parameters, but not significantly different for root length, fresh weight and dry weight of plants. It can be concluded that bacteria isolated from the rhizosphere of corn (Zea mays) with the codes RJI and RJ5 are able to increase plant growth so that they have the potential as biofertilizer candidates that can be developed in the future.
Geese: A Valuable Genetic Resource for Meat Production Tamzil, M.H.; Indarsih, B.; Syamsuhaidi, S.
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): 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.v25i2.8744

Abstract

This article is a review written to provide information to readers about geese as livestock. Geese are herbivorous waterfowl with high genetic diversity. There are three centers of goose domestication in the world, namely Europe, China and Egypt. Geese can be developed as a meat producers as a functional food source, as well as by-products in the form of feathers which have high economic value. In order to produce high performance, geese need a balanced feed, which contains enough metabolic energy, crude protein and macro minerals. Geese can be developed as an alternative poultry meat producer to meet the need for poultry meat from other chickens, ducks and muscovy ducks.
Multilocus Analysis of matK, atpB-rbcL Intergenic Spacer, and trnL-trnF Intergenic Spacer in Pandanaceae Putri, Fatma Jumaita; Herman, Herman; Roslim, Dewi Indriyani
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): 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.v25i2.8775

Abstract

Species within the Pandanaceae family, particularly those in the Pandanus genus, exhibit substantial morphological variation, often leading to challenges in accurate species identification. This study conducted a multilocus DNA barcode analysis using sequences of matK, atpB-rbcL Intergenic Spacer (IGS), and trnL-trnF Intergenic Spacer (IGS) obtained from GenBank. Sequence alignment was performed using MAFFT v.7, and the aligned sequences were concatenated into multilocus datasets. Further analyses included frequency data evaluation and phylogenetic tree construction using the Neighbor Joining method in MEGA11. Results revealed that matK had the highest number of conserved sites and the greatest genetic stability, making it particularly effective for identifying broader taxonomic groups. In contrast, atpB-rbcL IGS and trnL-trnF IGS showed greater genetic variation, useful for distinguishing species with similar morphological features. Phylogenetic trees based on single- or two-locus data often failed to group species accurately, while multilocus combinations yielded well-resolved and more reliable tree structures. Therefore, the combined use of atpB-rbcL IGS + matK + trnL-trnF IGS significantly improves species resolution and reduces taxonomic misidentification within Pandanaceae. This study underscores the importance of multilocus barcoding in addressing limitations of morphological classification and enhancing molecular taxonomy in morphologically complex plant groups.
Phytoplankton Diversity and The Potential of Harmful Algal Blooms (HABs) in Utan Waters Sumbawa Supriatna, Nunung; Buhari, Nurliah; Jefri, Edwin
Jurnal Biologi Tropis Vol. 25 No. 2 (2025): 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.v25i2.8781

Abstract

Phytoplankton serve as primary producers and bioindicators in aquatic ecosystems. Elevated nutrient concentrations can trigger excessive phytoplankton proliferation, resulting in Harmful Algal Blooms (HABs) that adversely affect aquatic organisms. This study evaluated phytoplankton diversity and the potential for HAB formation in Utan Waters, Sumbawa. Water samples were collected from three purposively selected stations and analyzed in the laboratory to identify phytoplankton genera and calculate ecological indices, including diversity, evenness, dominance, and abundance. Concurrent in situ measurements of temperature, salinity, and current velocity were conducted. A total of twelve genera across four classes were identified, with Oscillatoria (Cyanophyceae) exhibiting the highest abundance. The diversity index ranged from moderate values (H’ = 1.29–1.64), evenness varied from low to moderate (E = 0.54–0.71), and dominance was high (D = 1.93–2.00). Potentially harmful genera detected included Oscillatoria, Ceratium, Chaetoceros, Coscinodiscus, and Rhizosolenia; however, their abundances remained below established HAB thresholds, indicating no current bloom events. The presence of these genera suggests that environmental conditions may support HAB development in the future. Therefore, regular monitoring and nutrient analyses (nitrate, phosphate, chlorophyll-a) are recommended for early detection and sustainable ecosystem management.

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