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INDONESIA
JURNAL BIOLOGI INDONESIA
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : 08544425     EISSN : 2338834X     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology
Arjuna Subject : -
Articles 847 Documents
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Komposisi Fitoplanton dan Status Kesuburan Perairan Danau Lido, Bogor-Jawa Barat Melalui Beberapa Pendekatan Pratiwi, Niken TM; Hariyadi, Sigid; Ayu, Inna Puspa; Iswantari, Aliati
JURNAL BIOLOGI INDONESIA Vol 9, No 1 (2013): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v9i1.152

Abstract

Danau Lido merupakan perairan yang banyak dimanfaatkan untuk berbagai aktivitas manusia yang akan memberimasukan bahan organik dan anorganik ke perairan. Masukan tersebut dapat meningkatkan kandungan nutrienperairan. Hal ini dapat menyebabkan berubahnya status kesuburan perairan. Penelitian ini bertujuan untukmengetahui komposisi fitoplankton dan menduga status kesuburan perairan Danau Lido melalui beberapa pendekatan.Komposisi fitoplankton di stasiun KJA dan non-KJA relatif sama. Proporsi dan kelimpahan tertinggiberasal dari kelompok Bacillariophyceae, terutama dari genus Melosira sp. Status kesuburan berdasarkan parameteryang diolah dengan menggunakan pendekatan TSI, TRIX, dan Indeks Nygaard menunjukkan bahwa perairan DanauLido memiliki status kesuburan eutrofik. Indeks Nygaard masih relevan dan dapat diterapkan dalam penentuanstatus kesuburan perairan.Kata kunci: Danau Lido, Indeks Nygaard, status trofik, TRIX, TSI
Skrining Rhizobium dari Wamena pada Weki di Rumah Kaca Latupapua, H.J.D.
JURNAL BIOLOGI INDONESIA Vol 3, No 2 (2001): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v3i2.3480

Abstract

ABSTRACTThe Screening of Isolated Rhizobium from Wamena on Weki in Green House Condition. The green house experiment has been carried out to study the effectiveness of some Rhizobium isolates on the growth of weki (Paraserianthes falcataria) seedlings. Thirteen isolates of Rhizobium viz. 1wy(1), 1wy(2), 1wy(3), 2wy(4), 3wy(1), 3wy(2), 4wy(1), 5wy(1), 6wy(1), 7wy(1), 9wy(1), 10wy(3) and 11wy(1) have been screened and inoculated to the plant seedlings. The purpose of the study was to find out whether the Rhizobium isolates able to stimulate and improve the growth of weki seedlings. The results showed that all of the Rhizobium isolates could stimulate the production of the root nodules . However each isolate was difference effect on the plant growth. Isolate number 11 wy(1) could stimulate all the plant growth parameters significantly.Key words: Screening, seedling, Paraserianthes falcataria, weki, green house, Rhizobium.
Pengujian Ketahanan Kekeringan pada Tanaman Garut (Maranta arundinacea L.) Hasil Mutasi Dengan Radiasi Sinar Gamma Hidayati, Nuril; Sukamto, Lazarus A.; Juhaeti, Titi
JURNAL BIOLOGI INDONESIA Vol 8, No 2 (2012): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.008 KB) | DOI: 10.14203/jbi.v8i2.3053

Abstract

Drought Tolerance Assay on Resulted Mutation of Arrowroot Plant (Maranta arundinacea L.) with Gamma Irradiation. Selection of garut (Maranta arundinacea L.) toward drought stress was conducted in induced mutant by using provenance plants from some semi aridregions of East Jawa. In this research three provenance were used 1) Garut from Dusun Pogal, Desa Lebakrejo, Kec. Purwodadi, Kab. Pasuruan (N1); 2) Garut from Dusun Sembung, Desa Parerejo, Kec. Purwodadi, Kab. Pasuruan (N5); 3) Garut from Dusun Genitri, Desa Gunting, Kec. Sukorejo, Kab. Pasuruan (N8). Provenance plants were treated with mutation induction using several levels of gamma radiation i.e. 0, 10, 20 and 40 Gy. The inducted plants were thenplanted in optimum environmental condition for acclimatization. After 5 months the plants were placed in a greenhouse for water stress treatments. Three levels of water regimes 1) optimum water (field capacity Ø = -0,3 to -1,5 Mpa); 2) 7 days watering interval (Ø =-1,0 to -11,0 Mpa); 3) 14 days interval (Ø = -4,0 to -15,0 Mpa). Plant drought tolerance was examined by analyzing morphological and physiological characteristics related to drought tolerant characteristics, including stomatal conductance (stomatal opening), transpiration, rate of CO2 assimilation, biomass production and yield, Harvest Index and drought Tolerance Index. The resultsshowed that radiation treated plants were more capable of maintaining their water potential (Ø). This indicated by significantly higher values of Ø in treated plants i.e. -2.95 Mpa(10 Gy),-2.86 Mpa (20 Gy) and -2.84 Mpa (40 Gy), compared to -3.74 (Untreated plants). Drought stressed plants produced total biomass 79,55 g/plant, much lower compared to unstressed plants (308,20 g/plant). The highest yield was N8 (219,53 g biomass and 139,83 g tuber), followed by N1 (183,32 g biomass and 126,20 g tuber) and N5 (178,8 g biomass and 136,64 g tuber). Drought Tolerance Index of untreated N1 was the highest (1,27), followed by N5 treatedwith 40 Gy (1.22), N1 with 10 Gy (1.17) and N8 with 40 Gy (1.00). Among radiation treatments, untreated plant produced the highest yield followed by the plants treated with 10 Gy, and the lowest was treated with 40 Gy.Keywords: Drought, tolerance, Maranta arundinacea, mutation, gamma, radiation
Tingkah Laku Melahirkan dan Estrus Tikus Lesoqlati Sulawesi Maxomys hellwandii (Jentink, 1879) Wahyuni, Indyah
JURNAL BIOLOGI INDONESIA Vol 5, No 2 (2008): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (127.132 KB) | DOI: 10.14203/jbi.v5i2.3199

Abstract

ABSTRACTParturition Behavior and Estrus of Sulawesi spiny rat Maxomys hellwandii (Jentink, 1879).This research is aimed to study the parturition behavior of wild Sulawesi spiny rat involvingobservations of pre-parturition, parturition and post- parturition behaviors. In this study, 15female white tail rats at the ages of 60 days old were used to evaluate their estrus. Animals weremaintained in cages made of glass at size of 1m x1mx1.5m. The covers of cages were made ofram wire and completed with feeder and drinker. For estrus observation, animal cages weremade of plastic trays of 39 cm x42 cm x15 cm. The phase of estrus cycles observation was doneby collecting sample of vagina smear from the animals. The determination of cycles phase wasbased on the cell types that were obtained from preparation vagina smear. The results showedthat about six hours before parturition, the animals were nervous and urinated 4 to 9 times asthey showed agonistic. The parturition process needed 3 to 8 minutes. The deviation times ofsuckling progeny were 8-12 seconds. The progeny at the ages of 1 to 5 days old slept againsttheir mother nipples. For the estrus, the results showed that estrus cycle of wild white tail ratswas ranging from 3 days to 5 days, consisted of pro estrus (12 hours), estrus (12 hours), metestrus (18 – 12 hours) and di-estrus (45 - 54 hours).Key Words: Parturition Behavior, Estrus, Maxomys hellwandii.
Sifat Fisikokimia Tepung Gembili (Dioscorea esculenta (Lour.) Burk.) Hasil Fermentasi dengan Penambahan Inokulum Bakteri Selulolitik dan Bakteri Asam Laktat Saskiawan, Iwan; Nafi’ah, Maidatun
JURNAL BIOLOGI INDONESIA Vol 10, No 1 (2014): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v10i1.335

Abstract

Gembili is a tuber plant which is usually used as an alternative food source. It containts high carbohydrates andpotentially to be developed into flour. Fermentation of gembili is the method to improve the quality of gembiliflour. The objective of this research was to study the physicochemical properties of fermented gembili flour with theaddition of cellulolytic (BS) and lactic acid bacteria (BAL). There were four treatments, namely naturalfermentation without the addition of neither BS nor BAL, with the addition of BS, with the addition of BAL, andwith the addition of BS and BAL. Fermentation was carried out for three days. Temperature, pH, the number ofbacteria, as well as cellulase and amylase activity were observed every day. The studies of physical properties ofgembili flour were the color, flavor, texture, and yield. Furthermore, the chemical properties included water, ash,carbohydrate, fat, and protein content. Data were analyzed by ANOVA and continued by LSD test at 5%significance level. It showed that the physical properties of flour color in the treatment of BS fermentation werebetter than other treatments. However, the aroma and texture did not show any significant difference. Thechemical properties showed no significant difference among all treatments.Keywords: fermented gembili flour, physicochemical
Keragaman Jenis Khamir Penghasil Etanol yang Diisolasi dari Makanan Fermentasi di Kepulauan Riau Sumerta, I Nyoman; Kanti, Atit
JURNAL BIOLOGI INDONESIA Vol 13, No 1 (2017): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (901.807 KB) | DOI: 10.14203/jbi.v13i1.3096

Abstract

ABSTRACTInformation on genetic diversity of fermentative yeast which produce ethanol is very crucial in developing biofuel production in Indonesia. Research on ethanol producing yeasts is interest of many scientist. The objective of study was to reveal yeast diversity in Indonesian fermented foods that able to produce ethanol. The sample of fermented foods were collected in the traditional market in Karimun Besar Island, Kepulauan Riau. Yeast isolation was performed using serial dilution with direct plating and enrichment culture with glucose as carbon source. Fifteen of isolates were isolated and identified by amplification of D1/D2 region LSU 26S rDNA. Its ethanol production characteristic was analyzed base on fermentation activity and measurement with gas chromatography for ethanol content. The result revealed that 8 yeast species were found belong to Ascomycetous and grouped into 5 clades which are able to produce ethanol. The highest ethanol production was obtained by Saccharomyces cerevisiae Y15Kr107 (3.53%) followed by Torulaspora delbrueckii Y15Kr104 (1.63%), Saccharomyces cerevisiae Y15Kr093 (1.58%), Candida glabrata Y15Kr110 (1.4%), Torulaspora delbrueckii Y15Kr103 (1.29%), Candida glabrata Y15Kr108 (1%), Torulaspora globosa Y15Kr094 (0.92%), Kodamaea ohmeri Y15Kr096 (0.61%), and Pichia kudriavsevii Y15Kr106 (0.31%) Y15Kr105 (0.21%) Y15Kr109 (0.16%). Other yeasts strains did not produce ethanol but may play different role in fermentation process.Key words: yeast, fermented food, ethanol, Kepulauan Riau
Model Spasial Terhadap Faktor yang Mempengaruhi Keberadaan Kambing Hutan Sumatera [Capricornis sumatraensis sumatraensis pechstein, 1799)l di Wilayah Sipurak, Taman Nasional Kerinci Seblat, Jambi Susanti, Neneng
JURNAL BIOLOGI INDONESIA Vol 4, No 3 (2007): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5224.367 KB) | DOI: 10.14203/jbi.v4i3.3260

Abstract

ABSTRACTSpatial Modelling Impact for Sumatran Serow Occupancy [Capricornissumatmensissumatraensis (Bechsteiu, 1799)] at Sipurak-Kerinci Seblat National Park, Jambi.Existency for habitat preference of sumatran serow is very important to support the wildlifemanagement. The research was designed to study the influence of factor of spatialhabitat occupany or habitat preference of sumatran serow [Copricornis sumatraensisAbstractsumotraensis (Bechstein, 1799)l. The detection-non detection survey method was appliedfor observation. Data processed by using software Arcview 3.2, and PRESENCE PC.From the ten model selected, there was little variation in the estimates of occupancy (Y )IPA0 (ranging from 0,7283 to 0,7637) and detection probability orp (0,2407 to 0,2495).The top two ranked models are distance to forest and slope. Its mean th%t distance toforest and slope have good influence on occupancy of Sumatran serow. The factors ofspatial habitat have positive correlation to PAO. Sumatran serow occupancy was greaterin grid cells that were further from the forest edge, in grid cells that were located onsteeper slopes, and also from others spatial habitat factors.Key words: The factor of spatial habitat; sumatran serow; PAO; detection probability; Sipurak.
Identifikasi Molekular dan Karakterisasi Morfo-Fisiologi Actinomycetes Penghasil Senyawa Antimikroba Nurkanto, Arif; Agusta, Andria
JURNAL BIOLOGI INDONESIA Vol 11, No 2 (2015): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v11i2.2193

Abstract

ABSTRACTThe objectives of study were to identify antimicrobial producing Actinomycetes using 16S rDNA analyses and morphology and physiology characteristics. Eight Actinomycetes strain with the higest antibacterial and antifungal activity were selected and identified using six primers (20F, 520F, 920F, 1500R, 920R, and 520R). Morphological observation and physiology analyses were performed to the selected strain to accurately identify the strains. Morphological characters observed were aerial mycelium, spore chain, colony form, and pigment production. Physiological characterizations were antimicrobial properties, growth temperature, pH tolerance, salinity concentration for growth, sugars assimilation, and some enzymes production (arginine dihydrolase, urease, ß-glucosidase, protease, ß-galactosidase). Based on homology search by BLAST program and phylogenetic tree analyses, all of isolates were identified as the genus Streptomyces. They belong to eight different spesies. Isolates RC-SS-37-4, RC-SS-37-16 and BL-22-3 have been identified as Streptomyces costaricanus (100 %), Streptomyces costaricanus (99.8 %) and Streptomyces parvulus (98.6 %), respectively. Five isolates were identified as Streptomyces spp. (BL-36-1, BL-20-2, BL-14-2, BL-22-1 and BL-06-5) and can be presumed as new species because of the low homology value to their closest related spesies. Keywords : actinomycetes, antimicrobial, morphology, phylogenetic, physiology, 16S rRNA gene. 
Kajian Hubungan Antara Fitoplankton dengan Kecepatan Arus Air Akibat Operasi Waduk Jatiluhur Harsono, Eko
JURNAL BIOLOGI INDONESIA Vol 7, No 1 (2011): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (724.467 KB) | DOI: 10.14203/jbi.v7i1.3132

Abstract

ABSTRACTStudy on The Relationship Between Phytoplankton and Current Velocities due to Operationof Jatiluhur Reservoir. High abundance of phytoplankton may create oxygen depletionwithin water column, in which may also lead as a threat to the fisheries activities of floatingcage in the Jatiluhur reservoir. In addition, phytoplankton may also clog the filter within watertreatment plant that is currently using the water from Jatiluhur reservoir. The research objectivewas investigate effects of changing water current velocity to the abundance of phytoplanktonin the Jatiluhur reservoir. Phytoplankton, measured as chlorophyll-a, were sampled at 10 differentsampling points of 0, 4, 8 and 10 m depth. While current water velocities were calculated usingtwo-dimensional multilayer equation. The equation will calculate x and y axis current velocitieswithin different depth of the reservoir. Result shows that in the area in which the currentvelocities higher than 15 cm/s less phytoplankton would be found. These velocities found ifthe operation of water discharge from reservoir was more than 70 m3/s. The research suggeststhat discharging operation from reservoir can be used as an indicator for the early warningsystem for the fisheries activities in the reservoir.Keywords: Jatiluhur reservoir, current velocity, phytoplankton abundance, reservoir operation,two-dimensional multilayer equation
Kecernaan dan Efisiensi Pakan pada Oposum Layang (Petaurus breviceps) di Penangkaran Farida, W. R.; Sulistyowati, Sulistyowati; Sigit, N.; Pratas, R. G.
JURNAL BIOLOGI INDONESIA Vol 3, No 4 (2002): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v3i4.3390

Abstract

ABSTRACTDigestibility and Feed Emciency of Flying Squirrel (Petaurus breviceps) in Captivity.Two male flying squirrel (Petaurus breviceps) were used in this experiment to observe feedintake, digestibility and feed efficiency of them. The animals were given alternative diets incaptivity, namely passion fruit, sweet corn, banana, guava, papaya, coconut, sun flower bean,bread, and dogfood. The result showed that average intake of ash, crude protein, ether extract,crude fiber, nitrogen free extract, and gross energy were 2.4%, 2.3%, 9.3%, 6.0%, 69.9%, and4.0 kkallg respectively. The nutrient digestibility coefficient ash, crude protein, ether extract,crude fiber, and nitrogen free extract were 33.6%, 73.5%, 96.2%, 60.9%, and 95,5%respectively. Average body weight gain is 0.35 g/head/week and feed efficiency is 0,4%. Thepreferred feed is bread (58%), sweet corn (l2%), and coconut (1 1 %).Key words: Digestibility, consumption, feed efficiency, Petaurus breviceps

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