Jurnal Biologi Tropis
ISSN / EISSN : 1411-9587 / 2549-7863
Current Publisher: Universitas Mataram (10.29303)
Total articles ≅ 276
Latest articles in this journal
Jurnal Biologi Tropis, Volume 21, pp 89-94; doi:10.29303/jbt.v21i1.2351
Harapan forest is the remaining lowland tropical forest in Sumatra which represents about 20 percent of the biodiversity on the island of Sumatra. There are several Rasbora species found in the Sungai Kapas Tengah River Refuge in the Harapan Jambi Forest that the relationship is not yet known.This research aims to know kinship and genetic distance several species of Rasbora from Sungai Kapas Tengah, Hutan Harapan Jambi. The method in this research using secondary data from the NCBI website ((National Center for Biotechnology Information). The data taken, namelynucleotide sequence from the Cytochrome Oxidase I (COI) gene in mitochondrial DNA. The Rasbora species analyzed were Rasbora from identification results in the Sungai Kapas Tengah River Refuge, Harapan Jambi Forest, consisting of, Rasbora bankanensis, R. caudimaculata, R. cf. sumatrana, R. dusonensis, R. elegans, R. sumatrana, and R. trilineata. Based on phylogenetic analysis, the location of the branch length in each Rasbora species, the closest kinship is owned byR. sumatrana and R. elegans species. Based on the results of genetic distance analysis, the closest genetic distance was the species R. elegans and R. sumatrana, with a distance value of 0.023 (2.3%). While the farthest genetic distance between R. bankanensis and R. caudimaculata, with a distance value of 0.172 (17.2%).Based on research results It can be concluded that R. bankanensis has a greater kinship and genetic distance value than other Rasbora species, so that this species forms a separate group. Meanwhile, 5 other species have kinship and the value of close genetic distance so that these species are united in the same group. For future researchers, it is hoped that some additional families of fish species will be analyzed for phylogenetic analysis in Sungai Kapas, Hutan Harapan Jambi, so that they can find out the relationship of several other species.
Jurnal Biologi Tropis, Volume 21, pp 120-130; doi:10.29303/jbt.v21i1.2209
Drinking water is one of the most essential human needs. The purpose of this study was to investigate the status of the water quality of PDAM Giri Menang as a source of drinking water for people in Mataram area based on physical, chemical, and microbiological parameters. Determination of sample points was done by random sampling method while the samples were collected by using composite sample method. The results of analysis of physical parameters (odor, taste, turbidity, temperature, color), chemical parameters (dissolved oxygen, iron (Fe), pH, hardness, manganese (Mn), chloride (Cl-), ammonia (NH4), cadmium (Cd) ), and the microbiological parameters including the presence of E.coli bacteria and total Coliform in the five PDAM water samples generally meet the quality of drinking water since the value of each parameter was below the maksimum value set by Permenkes RI No. 492/2010 concerning requirements quality of drinking water. The conclusion from the research results shows that the status of water quality PDAM Giri Menang as a source of drinking water for people in Mataram area is very good according to the mandatory parameters, namely physics, chemistry, and microbiology that are in accordance with the Republic of Indonesia Minister of Health Regulation No. 492/2010 regarding the requirements for the quality of drinking water. The results of this study can be used as a reference for further research with more samples and parameters, especially in the city of Mataram and West Lombok.
Jurnal Biologi Tropis, Volume 21, pp 131-139; doi:10.29303/jbt.v21i1.2443
Sweet corn fruit is one of the food favored by the people of Indonesia. The growth and yield of sweet corn can be increased by fertilizing. Research on the response of sweet corn growth to organic and NPK fertilizer was conducted in the Terong Tawah Village, West Lombok Regency. The purpose of this research was to determine: (1) response of the growth of sweet corn to the organic fertilizer treatment, (2) response of the growth of sweet corn to the NPK fertilizer treatment, (3) the effect of the interaction between organic and NPK fertilizer on the growth of sweet corn. The growth parameters of sweet corn are stem height, leaf lenght, number of leaf and stem diameter. Research data were analyzed using analysis of variance. The results showed that: (1) sweet corn growth has a positive response to the organic fertilizer, organic fertilizer can increas stem height, leaf lenght, number of leaf and stem diameter, (2) sweet corn growth has a positive response to the NPK fertilizer, NPK fertilizer can increase all growth parameter, (3) the interaction between organic and NPK fertilizer has no significant effect on all growth parameters, (4) the optimum dose of organic fertilizer is 1.5 kg m-2 of agricultural land, (5) The treatment of 6 g NPK fertilizer was better than other treatments.
Jurnal Biologi Tropis, Volume 21, pp 72-80; doi:10.29303/jbt.v21i1.2340
Plant damage by pathogenic fungi is often found in plants, one of which is caused by Sclerotium rolfsii. Biological control strategy offers a promising alternative for managing disease in plants because they are environmental friendly compared to pesticides application. One of the biological control offered is by using endophytic fungi isolated from Vitex trivolia L. The aim of the study was to isolate, to identify macroscopic and microscopic endophytic fungi from Vitex trifolia L and to test their antagonism potency against the pathogenic fungus Sclerotium rolfsii in vitro. The isolation obtained 7 endophytic fungi isolates identified based on their genus characteristics, nsmely Periconia sp, Aspergillussp, Dendrophoma sp, Geotrichum sp, Ampulliferina sp, Chalara sp, dan Bispora sp and 2 isolates have not been identified. The Antibacterial test of the fungi isolate on the 4 tested bacteria showed that of all the fungi isolate have low activity. The antagonism test using the direct opposition method with the PIRG formula, showed that the 3 isolates had high percentage of growth inhibition, in which ALJ1, BLJ5, and ALJ3 isolate has 85%, 90%, and 100% respectively. This potency could be used as biological agents on the pathogenic fungus Sclerotium rolfsii.
Jurnal Biologi Tropis, Volume 21, pp 157-170; doi:10.29303/jbt.v21i1.2426
Fertilizer is one of the most important needs for plants. Fertilizing can be done by using inorganic fertilizers or organic fertilizers. Long term fertilizing by using inorganic fertilizers without adding the organic matter could potentially reduce soil fertility and lead to not optimal growth of the plant. This study aims to determine the effect of liquid organic fertilizer (LOF) made from rabbit urine, NPK fertilizer, and the combination of both fertilizers on the growth of bok choy, and to determine the best fertilizer dosage for the growth of bok choy. This study uses a Completely Randomized Design consisting of 2 factors, the dose of rabbit urine LOF and dose of NPK fertilizer; 4 dosage levels each in triplicates. Data was analyzed using ANOVA followed by DMRT Test. The results indicates that the application of LOF made from rabbit urine, NPK fertilizer, and the combination of both fertilizers increases plant height, leaves number, leaf area, wet weight, dry weight, and chlorophyll total of bok choy. DMRT (a 5%) test shows the best dosage applied for enhancing growth parameter are 6 ml of LOF plus 0,4 gram of NPK for plant height, wet weight, and dry weight, the 4 ml of LOF plus 0,6 gram of NPK for leaves number and leaf area, and the 4 ml of LOF plus 0,4 gram NPK for chlorophyll total.
Jurnal Biologi Tropis, Volume 21, pp 149-156; doi:10.29303/jbt.v21i1.2442
The sunfish or mola fish (Mola spp.) is one of marine tourism’ icon in Nusa Penida waters where they appear seasonally. This study was aimed to observe the habitat characteristics of mola fish at the depths of diving tourism where they are visible. The research was conducted from July to December 2019 using survey and descriptive methods to obtain information of mola fish animal linked to habitat conditions. On its appearance data on depths, temperatures, currents, and the presence of symbiotic fishes were observed directly assisted by dive center operators. By comparing the morphological characteristics shown photographically, it is assumed that mola fish in study area is composed by two species, M. alexandrini and M. mola. The highest individual record was in September and decreasing along the incoming months. Mola fish prefers calm deeper water with lower temperatures coincides with the presence of cleaning reef fishes.
Jurnal Biologi Tropis, Volume 21, pp 103-111; doi:10.29303/jbt.v21i1.2282
Green betel leaf (Piper betle L.) contains secondary metabolites, namely alkaloids, flavonoids, steroids, terpenoids, saponins, tannins. Green betel leaf (Piper betle L.) is widely used for wound healing, especially in rural Indonesians. This study aims to determine the effect of green betel leaves extract (Piper betle L.) on wound healing in mice (Mus musculus L.). The samples were determined using a randomized block design (RBD) using mice (Mus musculus L.) which consisted of three treatment groups using a concentration of 20%, 30%, 40% and one control group. The Measure of the average diameter of the wound was using a ruler on each side of the diameter. The data measurement for the average diameter of wound restriction was analyzed by using the one way. The one way Anova test showed that the sig or p-value is 0.000 0.05, which means that no change occurs in mice when given 30% or 40% extract. Green betel leaf extract (Piper betle L.) has an effect on wound healing in mice (Mus musculus L.).
Jurnal Biologi Tropis, Volume 21, pp 199-205; doi:10.29303/jbt.v21i1.2485
Macroalgae is a commodity that is used as food, medicine, fertilizer and other materials in industries. Macroalgae in the medical world have the potential to be anticancer, antiviral, antifungal and antibacterial. One type of macroalgae that has the potential as an antibacterial source is Sargassum polycystum. This study aims to analyze the ability of the methanol extract of S. polycystum to inhibit the growth of bacteria (Escherichia coli and Staphylococcus aureus) and analyze the potential compounds contained in the methanol extract of S. polycystum. This research is an experimental study using a completely randomized design. Extraction method by maceration. The test concentrations used were 20%, 40%, 60%, 80%, positive and negative control. While the test method uses a good diffusion method. Data were analyzed using description and SPSS application. The results showed that the methanol extract of S. polycystum had better inhibition against S. aureus growth than E. coli. The methanol extract concentration of S. polycystum, which had the best inhibition against S. aureus and E. coli was 80%. Metabolites content on S. polycystum extract is Tetradecanoic Acid, Loliolide; Hexadecanoid Acid, Methyl Ester, 9-Hexadecanoid Acid, Hexadecenoic Acid, 8-Octadecanoic, Methyl Ester, 5,8,11,14-Eicosatetraenoic Acid and Ethyl Ester.
Jurnal Biologi Tropis, Volume 21, pp 255-261; doi:10.29303/jbt.v21i1.2456
Lebak swamp in Bukit Baru has been largely degraded due to reclamation activity. Lebak swamp plays important role as land resource in Bukit Baru, Palembang. The aim of this study was to examine the composition of Odonata in lebak swamps in Bukit Baru, Palembang, Indonesia. The transect line (1 km) was used to collect odonata in the study area. This study recorded 8 species during the study period. The highest diversity of odonata was found in site A1. The highest abundance of odonata was recorded at site A2 and A4 and dominated by Ceriagrion coromandelianum and Orthetrum sabina. Neurothemis ramburii had the lowest abund ance at site A1 and A2, but absent at site A3 and A4. The occurrence of odonate species are lower at site around anthropogenic activity suggests the need to protect the lebak swamp so that such uncommon species will not go into local extinction. Neurothemis ramburii can become potential species to evaluate the rate of disturbed environment.
Jurnal Biologi Tropis, Volume 21, pp 206-212; doi:10.29303/jbt.v21i1.2461
Bees are known to be useful directly or indirectly in human life and ecosystem. This study aims to obtain information about the types of Trigona bees in three different habitats in South Sumatra. This research uses a descriptive method with a purposive sampling technique. Identification is done by observing the morphological characters. Trigona bee samples were taken from three different habitats, namely the Indralaya Sriwijaya University campus, the village of Aurduri Muara Enim, and the village of Kota Agung Lahat. The research found three species of Trigona bees from three different habitats. The three species are from three subgenera, namely Tetragonula, Heterotrigona, and Lepidotrigona. The location of the habitat for the Indralaya Sriwijaya University campus was found Tetragonula laeviceps, and Heterotrigona itama. The habitat of the village of Aurduri Muara Enim was found T. laeviceps and Lepidotrigona terminate. The location of the habitat for the village of Kota Agung Lahat was found T. laeviceps. The most common type of Trigona bee and found in almost every type of habitat is T. laeviceps. H. itama is only found on the Indralaya Sriwijaya university campus, while L. Terminate is only found in the village of Aurduri Muara Enim. Conclusion Trigona bees from 3 different habitats in South Sumatra found as many as 3 subgenuses, namely Tetragonula, Heterotrigona, and Lepidotrigona. The types of Trigona bees are T. laeviceps, H.itama, and L. terminata.