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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 20 Documents
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Search results for , issue "Vol. 20 No. 2 (2020): Mei - Agustus" : 20 Documents clear
The Influence of Paddy Fields toward The Seasonal Herbaceous Wetland Ecosystem in Rawa Pening Lake Desti Christian Cahyaningrum
Jurnal Biologi Tropis Vol. 20 No. 2 (2020): Mei - Agustus
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (566.839 KB) | DOI: 10.29303/jbt.v20i2.1932

Abstract

Most of the tidal land in the lakeside of Rawa Pening is currently used for rice farming activities. This activity is thought to have negative impacts on seasonal herbaceous wetland ecosystem in this region. The study aimed to analyze the influence paddy fields toward the seasonal herbaceous wetland ecosystems in Rawa Pening Lake through an vegetation composition and structure approach. This study is a quantitative descriptive research with field observation method. Data of vegetation was collected using line intercept transect technique in the area widely of 625 m2 for each affected and unaffected ecosystem sample. Data analysis was performed by calculating the Sorensen Similarity Index (IS), the Margalef Diversity Index (R), the Shanon-Wiener Diversity Index (H'), the Dominance Index (C), and the Evenness Index (E). The results showed that there were differences in the composition and structure of vegetation on the two ecosystem samples, seen from the value of similarity index (IS) between both of them that included in the low criteria (39.85%). The results also showed that the Shanon-Wiener Diversity Index (H') and the Margalef Diversity Index (R) on the affected ecosystem sample  (H' = 1,9834; R = 1,825) are lower when compared to the unaffected ecosystem sample (H'= 2,1297; R = 2,112). So it can be concluded that the existence of paddy fields has changed the composition and structure of vegetation and reduced the diversity of vegetation in the affected ecosystem. Based on these conclusions, it is recommended to construct a sustainable management system of paddy fields on Rawa Pening Lake's tidal land as the effort for natural ecosystems maintenance in this region, especially in the biodiversity and ecological services preservation.
Aktivitas Antibakteri Ekstrak Metanol Daun Turi (Sesbania grandiflora L.) Terhadap Pertumbuhan Klebsiella pneumoniae Huurun Iien; Lalu Zulkifli; Prapti Sedijani
Jurnal Biologi Tropis Vol. 20 No. 2 (2020): Mei - Agustus
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (315.405 KB) | DOI: 10.29303/jbt.v20i2.1790

Abstract

Abstrak: Sesbania grandiflora (tanaman turi) memiliki berbagai khasiat dalam pengobatan penyakit termasuk yang dapat digunakan sebagai campuran dalam persiapan bahan antibakteri. Tumbuhan ini mengandung senyawa metabolit sekunder yang dapat memiliki aktivitas sebagai zat antibakateri. Penelitian ini bertujuan untuk mengetahui kandungan metabolit sekunder ekstrak methanol daun turi dan mengetahui bioaktivitas ekstrak tersebut terhadap pertumbuhan bakteri Klebsiella pneumoniae. Daun S. grandiflora diekstraksi dengan metode maserasi menggunakan pelarut metanol. Hasil uji fitokimia secara kualitatif menunjukkan bahwa ekstrak metanol daun turi mengandung senyawa metabolit sekunder seperti tannin, saponin, dan terpenoid. Uji penghambatan sifat antibakteri dilakukan berdasarkan metode difusi sumuran, dengan mengukur rata-rata zona hambat yang terbentuk pada media MHA. Hasil penelitian menunjukkan bahwa ekstrak metanol dari daun S. grandiflora dengan konsentrasi 10%, 25%, 40%, dan 55% menunjukkan diameter rata-rata zona hambatan masing-masing 7,2, 14,4, 17,9, dan 22,5 mm. Kemampuan untuk menghambat pertumbuhan bakteri pada konsentrasi 55%, 40%, dan 25% dikategorikan sebagai penghambatan kuat karena memiliki diameter zona hambat rata-rata lebih dari 12 mm (sesuai dengan kategori Vasanthakumari). Konsentrasi yang semakin tinggi memberikan efek penghambatan yang lebih kuat. Hasil di atas menunjukkan bahwa kandungan ekstrak daun tanaman turi dapat digunakan sebagai sumber bahan obat baru di masa depan melalui penelitian lebih lanjut.Kata kunci: Ekstrak Daun Turi, maserasi, antibakteri, Klebsiella pneumoniae, metabolit sekunderAbstract: Sesbania grandiflora (Turi plant) has various medicinal properties, including as a mixture in the preparation of antibacterial ingredients. This plant contains secondary metabolites that can have antibacterial activity. This study aims to determine the secondary metabolite content of the turi leaf methanol extract and determine the bioactivity of the extract on the growth of Klebsiella pneumoniae. S. grandiflora leaves were extracted using the maceration method using methanol as a solvent. Phytochemical test results show that the turi leaf methanol extract contains secondary metabolites such as tannin, saponin, and terpenoids. The antibacterial inhibition test was carried out based on the well diffusion method, by measuring the average of the zone of inhibition formed on the MHA media. The results showed that the methanol extract of the leaves of S. grandiflora with concentrations of 10%, 25%, 40%, and 55% showed an average diameter of inhibition zones 7.2, 14.4, 17.9, and 22, 5 mm, respectively. The ability to inhibit bacterial growth at concentrations of 55%, 40%, and 25% were categorized as having a strong inhibitory power because it has an average inhibition zone diameter of more than 12 mm (according to the Vasanthakumari category). The higher concentration gives a stronger inhibitory effect. The above results show that the leaf of the turi plant can be used as a source of new medicinal ingredients in the future.  Keywords: Turi Leaf Extract, maceration, antimicrobial, Klebsiella pneumoniae, secondary metabolites
Identifikasi Karakter Morfologi dan Sensoris Kultivar Mangga (Mangifera Indica L.) di Kecamatan Langsa Lama, Aceh, Indonesia Marina Br Sembiring; Dira Rahmi; Mia Maulina; Vidia Tari; Rahmayanti Rahmayanti; Adi Bejo Suwardi
Jurnal Biologi Tropis Vol. 20 No. 2 (2020): Mei - Agustus
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (335.907 KB) | DOI: 10.29303/jbt.v20i2.1876

Abstract

Abstrak: Mangga (Mangifera indica L.) menjadi salah satu buah yang disukai dan memiliki banyak kultivar. Penelitian ini bertujuan untuk mengidentifikasi karakter morfologi dan sensoris kultivar mangga di kecamatan Langsa Lama, Aceh, Indonesia. Penelitian dilaksanakan di 5 desa, yaitu di desa Meurandeh, Sidodadi, Sidorejo, Meurandeh Teungoh, dan Asam Peutek, Kecamatan Langsa Lama, Kota Langsa, Aceh pada bulan Januari - Maret 2020. Pengumpulan data lapangan dilakukan dengan mengamati kultivar mangga yang dibudidayakan penduduk di kebun dan pekarangan rumah.  Seratus orang panelis dari 5 desa (20 orang setiap desa) dipilih secara acak untuk menilai kualitas warna, rasa, dan aroma dari buah mangga yang ditemukan. Sebanyak 5 kultivar mangga ditemukan pada lokasi penelitian, yaitu mangga arumanis, mangga apel, mangga golek dan mangga madu. Mangga tersebut memiliki karakter morfologi yang berbeda. Mangga Arumanis menjadi jenis kultivar mangga yang paling disukai berdasarkan atribut rasa, aroma, tekstur dan warna.Kata Kunci: Kultivar; sensoris; rasa; Langsa Lama;Abstract: Mango (Mangifera indica L.) is one of the most preferred fruit and has many cultivars. This study aims to identify the morphological and sensory character of mango cultivars in the Langsa Lama district, Aceh, Indonesia. The study was conducted between January and March 2020 in five villages, namely Meurandeh, Sidodadi, Sidorejo, Meurandeh Teungoh, and Asam Peutek, Langsa Lama District, Kota Langsa, Aceh. A field study was conducted by observing mango cultivars cultivated in the home garden and farmland. One hundred panelists from five villages (20 people from each village) were randomly selected to assess the taste, colour, and aroma of the mangoes. A total of five mango cultivars were identified at the study site, namely Arumanis, Apple, Golek, and Madu. These mangoes have different morphological characteristics. Arumanis is the most preferred product based on the taste, aroma, texture, and colour.Keywords: cultivar; sensory; taste; Langsa Lama; 
Cadmium (Cd) Resistance of Isolate Bacteria from Poboya Gold Mining in Palu, Central Sulawesi Fahruddin Fahruddin; Syahruddin Kasim; Eka Ummi Rahayu
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.v20i2.2013

Abstract

The mining industry in Indonesia is growing rapidly, giving an environmental impact from the waste produced because it contains dangerous heavy metals, one of which is cadmium metal (Cd). The purpose to know the ability of cadmium resistance in bacterial isolates. Bacterial isolates were obtained from soil samples from the Poboya Gold Mine field, Palu. Bacterial isolation and selection were carried out by the plate count method, resistance testing using nutrient broth media containing heavy metals Cd, analysis of Cd concentrations using atomic absorption spectrophotometers. From the results of the study, four types of Cd resistant isolates were obtained based on macroscopic and microscopic characterization results, namely isolates EK1, EK2, EK3 and EK4. The two best isolates of Cd resistance, EK2 and EK4 isolates were tested on media containing 20 ppm Cd, showing that both of these isolates were able to significantly reduce Cd concentrations in the supernatant and pellets.
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.
Vegetative Growth of Kale Land (Ipomoea reptans poir.) Due to Different doses of NPK and Bokashi Fertilizer Ahmad Raksun; Mahrus Mahrus; I Gde Mertha
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.v20i2.2022

Abstract

In order to maintain soil fertility, NPK fertilizer applications that have been carried out by farmer need to be combined with non chemical fertilizer such as bokashi. Research on vegetative growth of kale land due to NPK and bokashi fertilizer has been carried out in Bajur Village, West Lombok Regency. The purpose of this research was to detemine: (1) vegetative growth of kale land due to different doses of NPK fertilizer, (2) vegetative growth of kale land due to different doses of bokashi, (3) the effect of interaction of NPK and bokashi fertilizer on growth of kale land, (4) Optimum dose of NPK fertilizer and bokashi for kale land. This research used 2 factors design. The first factor is the dose of NPK fertilizer and the second factors is the dose of bokashi. The growth parameters measured were stem height, leaf length, leaf width and number of kale land leaf. Reseach data analyzed using analysis of variance. The results showed that: (1) NPK fertilizer treatment significantly affected stem height, leaf length and kale leaf width, but have no significant effect on the number of kale land leaves, (2) bokashi aplication significantly affected stem heght, leaf length and kale land leaf width but did not significantly affect the number of kale land leaves, (3) the interaction of NPK fertilizer and bokashi did not significantly affect all growth parameters measured, (4) the optimun dose of bokashi for kale land is 1,2 kg for 8 kg of soil and the optimum dose of NPK fertilizer is 1,5 g per plant.  It is recommended that kale land famers use 1,2 kg bokashi for 8 kg of soil and 1,5 g NPK fertilizer per plant.
Addition of Yeast Bread (Saccharomyces cerevisiae) in Feed to Increase Growth of Barramundi (Lates calcarifer) Nunik Cokrowati; Ika Linda Hartati; Dewi Putri Lestari
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.v20i2.1984

Abstract

Barramundi (Lates calcarifer) is known as Sea bass with a selling price of Rp.75,000 - Rp.80,000/Kg consumption size. The purpose of this study was to determine the effect of the addition of bread yeast with different doses to feed on the growth of Lates calcarifer. This study uses an experimental method with a Completely Randomized Design (CRD). The treatments were P0=0% yeast, P1=0.5%, P2=0.10%, P3=0.15%, P4=0.20% yeast from the weight of the feed given. The results of the study are the bread yeast influences the growth of Lates calcarifer. The highest absolute weight gain in P4 treatment was 0.507 g. The highest absolute length increase in P4 treatment was 0.990 cm. The lowest FCR at perlakuan P1 yaitu 15,55. The highest survival rates are P2, P3, and P4 which is 100%. Erythrocytes with the highest total amount in P4 treatment 12,58x106 - 18,62x106 cells/mm3. Leukocytes with the highest total number in P2 treatment were 27,96x106 - 44,641x106 cells/mm3. Water quality parameter values in the maintenance media are in the range of requirements for Lates calcarifer cultivation. The conclusion of the study is the addition of bread yeast affects the growth of Lates calcarifer and the optimal dose that can increase the growth is 0,20%.
Community of Seaweeds on Cemara Beach East Lombok Intan Mushlihah; Lalu Japa; I Gde Mertha; Ahmad Raksun
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.v20i2.1926

Abstract

Seaweeds (macroalgae) are a marine biological resource that have an important role in aquatic ecosystems and for society. The aim of this research was to determine community of seaweeds in Cemara Beach, East Lombok Regency.Data were collected at four observation points using a method of combinationof the line transect and quadrat. Seaweeds community data were analyzed using density parameters, important values, species diversity index, and species evenness index. The similarity percentage between transects was determined based on the Bray-Curtis cluster analysis using biodiversity program-version 2. In Cemara Beach there were 24 species of macroalgae which memberof 3 divisions, 11 orders and 15 families. Chlorophyta was a division with highest number of species. The number of species for Chlorophyta was 14 species, Rhodophyta division was 7 species, and Phaeophyta division 3 species. The species with highest density is Enteromorpha sp.,25.1 clumps/m2. Ulva lactuca is the species with the highest important value (72.69%). Diversity and evenness index in Cemara Beach seaweed species were 1,868 (medium category) and 0,699 (almost evenly distributed).The results of cluster analysis based on environmental parameters, species similarity and number of clumps of seaweed species, diversity index, and species evenness index indicate that seaweed in Cemara Beach can generally be divided into 2 groups.
The Effect of Adding Iodine to the Feed to Increase Growth and Survival Rate of Carp Seeds (Cyprinus carpio) Ayu Nirmaniar Fadliani; Ayu Adhita Damayanti; Ibadur Rahman
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.v20i2.1698

Abstract

One of the factors that greatly influence the successful growth of cultivated fish is feed. The aim of this study was to examine the effect of iodine addition on the growth and survival rate of carp (Cyprinus carpio) seeds. This study used a completely randomized design (CRD) method with 4 treatments and 3 replications. 10 fish per unit each, with treatment P0 (feed without adding iodine), P1 (feed + iodine at a dose of 10 mg / kg), P2 (feed + iodine at a dose of 20 mg / kg), P3 (feed + iodine at a dose of 30 mg / kg). The results showed that there was no significant effect (p> 0.05) on the growth rate, feed conversion and survival rate of goldfish. So it can be concluded that the addition of iodine in feed supplementation up to a dose of 30 mg / kg does not have a significant effect on the growth rate of length and absolute weight, feed conversion, survival rate and iodine content in the body of goldfish (Cyprinus carpio). The best recommended dose of iodine for growth is 20 mg / kg of feed, although the results were not significantly different for growth. However, it can have an effect on the iodine content in the body of goldfish.
Growth and Graduation of Vannamei Shell Life (Litopenaeus Vannamei) with Feeding Tray (ANCO) System in AV 8 Lim Shrimp Organization (LSO) in Sumbawa District Syamsul Bahri; Dwi Mardhia; Osi Saputra
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.v20i2.1812

Abstract

Vannamei shrimp species look for lunch and dinner. These properties need to be known related to the amount of feed and frequency of feeding to be given. Because wasted feed is expensive and can reduce water quality, optimizing feeding practices is an important issue in shrimp culture management. The use of some ANCOs is intended to monitor feed consumption and estimate feed adjustments. So it is necessary to conduct research on the growth and graduation of vannamei shrimp (Litopenaeus Vannamei) with the feeding tray (ANCO) system in Av 8 Lim Shrimp Organization (LSO) in Sumbawa Regency. The method used in this research is descriptive method, namely research based on reality and the facts of the situation as it is. The results showed that the amount of feed every week or sampling is always different, this is because the amount of feed adjusted to the addition of shrimp growth every sampling. Addition and reduction of feeding is adjusted to the results of checking feed consumption on ANCO, adding the amount of feeding is done if when checking ANCO there is no feed left. Reduction in the number of gifts is done if when checking ANCO still left feed. In the 8th sampling the amount of feed decreased to 38 kg, this was due to the first partial harvest. In the 10th sampling is the lowest amount of feeding which is 30 kg, this is due to the second partial harvest, but in the 11th sampling the number of feeding again increased so that the shrimp could grow to its maximum potential during panentotal.

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