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Kota mataram,
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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 2,562 Documents
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Nanoparticle Formula Optimization of Juwet Seeds Extract (Syzygium cumini) using Simplex Lattice Design Method Yohanes Juliantoni; Wahida Hajrin; Windah Anugrah Subaidah
Jurnal Biologi Tropis Vol. 20 No. 3 (2020): September - 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.v20i3.2124

Abstract

Diabetes is a degenerative disease whose numbers continue to increase from year to year. Treatment with oral antidiabetic drugs can cause harmful side effects for patients. One of the plants that can be used for diabetes therapy is juwet (Syzygium cumini L.). Flavonoid compounds of juwet seed is easily oxidized and hydrolyzed in intestinal fluids with low absorption. This problem can be overcome by forming nanoparticle of juwet seed extract. The aims of this study was to obtain the formula for juwet seed nanoparticles. Nanoparticle of juwet seed extract made by ionic gelation method with chitosan and Na-TPP polymers which are varied. The formula optimization design in this study was determined using a simplex lattice design by 3 variations of materials based on the parameters %entrapment efficiency, %transmittant, particle size, polydisperse index, and zeta potential. The results showed that the yield of duwet seed extract was 7,44%. Juwet seed ethanolic extract contains 3.33 mg of quercetin per 1 g of extract. Based on the desirability value approach, the optimum formula was produced with an extract composition of 1.650 mL; chitosan 0.500 mL; and Na-TPP 0.010 mL can give optimal results with a desirability value of 0.772 which results in the criteria of 63.66% entrapment efficiency; 50.56% transmittant; 615,833nm particle size; 0.620 PDI; and zeta potential of +13.89 mV. Juwet seeds extract can be formulated into the form of nanoparticles. To get better parameters, it is advisable to optimize the mixing time and mixing speed in the ionic gelation method.
The Community of Chlorophyta as Bioindicator of Water Pollution in Pandanduri Dam District of Terara East Lombok Zikriah Zikriah; Imam Bachtiar; Lalu Japa
Jurnal Biologi Tropis Vol. 20 No. 3 (2020): September - 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.v20i3.2344

Abstract

The Pandanduri Dam has a function as a support for agricultural irrigation water and also supports community activities so that it will affect the quality of its waters. The quality of the water needs to be analyzed because it can affect the aquatic ecosystem. This study aims to determine the level of water pollution in the Pandanduri Dam based on the phytoplankton community from the Chlorophyta Division. This type of research is descriptive exploratory. Sampling was carried out at 5 stations that were haphazardly selected with ecological representativeness consideration. Phytoplankton data were analyzed using the abundance formula, Shannon-Wiener diversity index, PIELOU uniformity index, and Simpson dominance index. The phytoplankton from the Chlorophyta Division found in the Pandanduri Dam were 14 species that are Pediastrum duplex var. Gracillimum, Gonium sp. 1, Gonium sp. 2, Coelastrum reticulatum, Scenedesmus acuminatus, Cosmarium sp., Chlamydomonas nasuta, Chlamydomonas sp., Selenastrum capricornutum, Monoraphidium dybowskii, Monoraphidium contortum, Monoraphidium irregular, Westella botryoides, and Kirchneriella lunaris consisting of 4 orders (Sphaeropleales, Chlorococcales, Chlamydomonadales and Desmidiales) and 10 genera (Pediastrum, Coelastrum, Scenedesmus, Gonium, Cosmarium, Chlamydomonas, Selenastrum, Monoraphidium, Westella, and Kirchneriella). The species diversity index of 2.21 is classified as moderate diversity, the species uniformity index is 0.83 which indicates even species growth, and the species dominance index indicates that no species dominates with a value of 0.12. The level of water pollution in the Pandanduri Dam was found in the moderate pollution category (oligotrophic).
Incubation of Oryzias woworae Eggs at Different Temperature on Embryo Development and Hatching Performance Nisa Nafiyanti; Mustahal Mustahal; Mas Bayu Syamsunarno; Muh. Herjayanto
Jurnal Biologi Tropis Vol. 21 No. 2 (2021): Mei - Agustus
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.v21i2.2575

Abstract

Oryzias woworae is one of Muna Island's endemic fish, Sulawesi, which needs to be developed in cultivation and can be used as ornamental fish with high economic value. However, information on fish farming is not yet well available, especially at egg incubation temperatures. This study aims to determine the optimal temperature of the incubation water medium for the hatching performance of O. woworae eggs. The study used experimental methods with the treatment of differences in egg incubation temperatures at 24-26°C (temperature fluctuations in the laboratory), 24°C, 28°C and 32°C. The research parameters were analyzed descriptively, namely embryogenesis, hatching time, and hatching rates. The results showed that differences in incubation temperature affected the embryogenesis of O. woworae eggs. The obtained fastest time for hatching eggs O. woworae at a temperature of 32°C with six days 5 hours 49 minutes and 100% hatching. The egg incubation temperature 24-26°C is the lowest hatching time and hatching rate, nine days 11 hours 38 minutes and 53.33%. The use of 32°C in the incubation medium is the optimal temperature to accelerate embryogenesis and the hatching rate of O. woworae eggs.
Variety of Tank Colours to Enhance the Colour Quality of Platyfish (Xyphophorus helleri) Ina Oktaviani; Muhammad Junaidi; Bagus Dwi Hari Setyono
Jurnal Biologi Tropis Vol. 20 No. 3 (2020): September - 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.v20i3.1630

Abstract

One of the factors that affect the colour quality of the platy fish (Xyphophorus helleri) during cultivation is the environment in bright light conditions, where setting bright light conditions can be done using a tank with a colour that can absorb light. Therefore, a study was conducted to examine the effect of tank colour on improving the colour quality of the platy fish and determining the correct tank colour. This research was conducted with an experimental method using a completely randomized design (CRD) consisting of five treatments repeated three times. The colour treatments of the tanks used were white, black, red, orange and yellow. The parameters observed were the increase in colour, growth in absolute weight and length and survival rate of platy fish. The results showed that the use of different tank colours had a significant effect (p <0.05%) on the improvement of colour quality and growth in absolute weight, and had no significant effect (p> 0.05) on absolute length growth and survival rate. The highest increase in colour quality was in white tanks with brightness values ranging from 13-15% and absolute weight growth ranging from 0.21 to 0.25 g. Therefore, in the cultivation of platy fish, a white tank should be used.
The Value of Habitat Complexity and Diversity of Reef Fish Species in Sangiang Island, Bima Regency, West Nusa Tenggra Rahmat Hidayatullah; Didik Santoso; Abdul Syukur
Jurnal Biologi Tropis Vol. 20 No. 3 (2020): September - 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.v20i3.2261

Abstract

Coral reef ecosystems in the marine environment have a vital role, especially in providing habitat for the diversity of commercial and non-commercial fish species. This study aims to assess the species richness of coral reef fish based on the complexity of the habitat of Sangiang Island, Bima Regency. The data collection method used Underwater Visual Census on the belt transect, and the habitat complexity value is determined by the chain intercept transect method. Data analysis used Shannon-Wiener Index Diversity (H '), Abundance (Ki), and Habitat complexity (C). Next is a simple regression analysis between habitat complexity as the independent variable and fish abundance as the dependent variable. In this study, 106 species were found and covering 24 families. The three fish families, Pomacentridae, Labridae, and Lutjanidae, are the most dominant of the other families. Meanwhile, the diversity index ranged from 1.874-2.753 with an average value of ± SD 2.35 ± 0.317, and the abundance value ranged from 0.774-2.528 individuals/m2 with an average value of ± SD 1.505 individuals / m2 ± 0.745. Furthermore, the analysis showed that hábitate complexity had a significant effect on fish abundance. The coefficient of determination (R2) of 80% can explain the relationship of habitat complexity to fish abundance in the study location. This study concludes that coral reef habitat complexity is a determining factor for the level of fish diversity and abundance in the study area. Therefore, the protection of coral habitat is a strategy for the protection of coral reef fish resources.
Relationship between Cycling Mileage and VO2max Value of Cyclists in Bike Community Mataram City, West Nusa Tenggara Ida Ayu Eka Widiastuti; Rifana Cholidah; Gede Wira Buanayuda
Jurnal Biologi Tropis Vol. 21 No. 1 (2021): Januari - April
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.v21i1.2451

Abstract

Currently cycling is a sport that is in vogue. Exercise that is done regularly and programmed will improve physical fitness, which can be seen from the maximum oxygen uptake (VO2max.). This study aims to determine the relationship between cycling distance and VO2max. value achievement on cyclists who are members of the bicycle community in Kota Mataram, Nusa Tenggara Barat. This research is an observational analytic study with cross sectional method. The research subjects were 34 cyclists from 5 bicycle communities in Kota Mataram, who were determined by non-probability sampling technique, namely consecutive sampling. VO2max. measurement, carried out by loading tests using the Bruce Protocol, while the cycling distance is obtained from the data recorded on the Strava application. The results showed that the mean VO2max. value of the subjects was 37.51 ml / kg / minute and the mean distance traveled by cycling was 4256.53 km. Correlative analysis using Spearman, obtained the value of r = 0.406 with p = 0.017. There is a significant correlation between cycling distance and VO2max. value with moderate correlation strength.
Monohibridization with Different Media Treatments on Fruit Flies (Drosophila melanogaster) Msy Elsa Mayori Aurora; Ika Oksi Susilawati
Jurnal Biologi Tropis Vol. 20 No. 2 (2020): Mei - Agustus
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v20i2.1895

Abstract

Drosophilla melanogaster is a modern experimental organism in the field of genetics because it has different phenotypic characters and looks real, easy to get, cheap (can be bred in bottles containing only fermented banana media) and has a breeding time that is not too long (2 weeks with maturation time) initial sexual ie 7 hours after exiting the pupa). This study aims to differentiate male and female fruit flies, create growth media for fruit fly culture and observe the phenotype ratio of F1 monohibrid crosses. The method used is the crossing of fruit flies by inserting male fruit flies and female fruit flies into a jam jar containing the medium using fermipan and not using fermipan. The phenotype and sex of fruit flies are formed from crossing of fruit flies. The results obtained in the form of fruit flies at most can grow on agar media and added corn flour with yeast. The medium needed by fruit flies to grow is a medium rich in protein and not much water dense. The media with corn flour is strong enough to resist thawing caused by larval activity, so that many larvae are found. Based on these conclusions, it can be continued observation of the fruit fly's politen chromosome in the next research.
Sunfish’s (Mola spp.) Habitat Characteristics on their Appearance at Dive Tourism Depths in Nusa Penida Waters, Bali Dewi SLKT; Mohammad Mukhlis Kamal; T Tarsidin; G Yulianto
Jurnal Biologi Tropis Vol. 21 No. 1 (2021): Januari - April
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.v21i1.2442

Abstract

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. 
Controlling Culex Quinquefasciatus Say, 1823 (Diptera: Culicidae) Using Several Lysinibacillus Sphaericus Isolates Endogenic to Indonesia Ika Indayati; Hari Purwanto
Jurnal Biologi Tropis Vol. 21 No. 1 (2021): Januari - April
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.v21i1.2566

Abstract

Mosquito-borne diseases include tropical diseases such as malaria, filariasis, dengue fever, chikungunya, yellow fever and cerebral fever are still major health problems in Indonesia and on a global scale. Various methods have been used to overcome this, including controlling vector mosquitoes using the entomopathogenic microbial Lysinibacillus sphaericus. This study aims to identify bacterial isolates collected based on the 16S rRNA gene and to carry out the pathogenicity test of the bacterial isolates collected on Cx. quinquefasciatus larvae. Bacterial isolates used in this study were collected from root soil, bird droppings and guano. The identification of the type of bacteria was carried out based on the 16S rRNA gene fragment. Based on the results of the 16S RNA sequence analysis of isolates 229C, 6B4, 6.2 and 4D21, it was found that the four isolates were included in the L. sphaericus species with similarity scores ranging from 97% to 100%. The pathogenicity of bacteria was measured based on the mortality of Cx. quinquefasciatus larvae to know whether it has pathogenicity equal to or higher than strain 1593. The pathogenicity test results of 6 isolates 15.4, 229C, 1593, 6B4, 6.2 and 4D21 showed that isolate 15.4 has the highest larval mortality rate, so it is potentially used as a biological agent to control disease vector mosquitoes.
Antimicrobial Activity of Pome granataum’s Endophytic Bacteria Against Pathogenic Microbe Putri Alfianti Sriwinahyu; Prapti Sedijani; Lalu Zulkifli
Jurnal Biologi Tropis Vol. 20 No. 3 (2020): September - 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.v20i3.2099

Abstract

White pomegranate (Punica granatum L.) is one of potential plant that can be use as an antimicrobial. The objective of this study was to determine antimicrobial activity of endophytic bacteria from white pomegranate (Punica granatum L.) in inhibiting the growth of pathogenic microbia (Staphylococcus aureus, Streptococcus viridans, Shigella dysentriae, Klebsiella pneumoniae and Fusarium sp. fungi). The stages of the research were isolation endophytic bacteria, antimicrobial assay, and characterization of potential endophytic bacterial. Endophytic bacterial were isolated from bark, leaves, flower, and fruit peel of white pomegranate taken from Gebang Baru, Mataram District. Antimicrobial assay was then performed using agar diffusion method, using supernatant of endophytic bacteria, water as negative control or ciprofloxacin as positive control. The potential isolates were characterized using Gram staining and biochemical test. The results showed that 2 endophytic bacterial isolates (DNX2 and BNG1) show strong activity against S. aureus, 3 endophytic bacterial isolates (BTG1, DNX11, and BNG1) show strong activity against S dysentriae, and 1 isolate KLBX11 shows medium activity against Fusarium sp. fungi. Those isolates are gram-possitive with bacill-shaped and produce spores. It can be concluded that it is possible to obtain potential endophytic bacterial from white pomegranate are potential as an alternative source for antimicrobial compounds.

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