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Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal
Published by Universitas Jenderal Soedirman
ISSN : 08531629     EISSN : 08531629     DOI : -
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science
Majalah Ilmiah Biologi Biosfera : A Scientific Journal merupakan peer reviewed jurnal yang diterbitkan oleh Fakultas Biologi Universitas Jenderal Soedirman. Media ini mewadahi hasil-hasil penelitian di bidang biologi tropika yang terbit tiga kali setahun (Januari, Mei, September).
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Vol 23, No 2 (2006)" : 7 Documents clear
Produksi Pigmen Karotenoid oleh Khamir Phaffia rhodozyma yang Diperlakukan dengan Radiasi Sinar UV Sri Pujiyanto; Wijanarka Wijanarka; Endang Kusdiyantini; T. A. Lestari
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 23, No 2 (2006)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2006.23.2.146

Abstract

Carotenoid pigment is an essential element in aquaculture, since it gives characteristic of color on shrimp and fish. Carotenoid pigments can be produced microbiologically using Paffia rhodozyma. Genetic improvement of the yeast, one of which can be accomplished by radiation mutation, will increase the production of carotenoid pigments. The aims of this study were to mutate P. rhodozyma using UV irradiation and to figure out pigment production by the mutant strains resulting from 30 minute-irradiation. Irradiated culture was incubated in dark condition and plated onto YMA media. Grown mutant colonies were collected in order to test for their pigment production. Pigment production was measured on the basis of extinction coefficient of 1%. The results showed that mutant strain encoded with MUV-1 produced the highest pigment at 179.96 mg/g dry weight cell, higher than the wild type (63.20 mg/g dry weight cell).
Model Pendugaan Biomassa Vegetasi Mangrove di Kabupaten Indragiri Hilir Riau Endang Hilmi; Asrul Sahri Siregar
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 23, No 2 (2006)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2006.23.2.160

Abstract

Indragiri Hilir mangrove forest is a type of one which is influenced by sea water tide, freshwater, soil texture, and salinity. The diversity of flora and fauna in the mangrove forest is relatively higher than that of many others in Indonesia. The potential vegetation is dominated by Bruguiera spp., Rhizophora spp., Avicennia spp., and Soneratia spp. This study was aimed to (1) determine biomass potential in Indragiri Hilir mangrove forest and (2) develop estimation model on the mangrove biomass with diameter of stem. The results showed that biomass potential of Rhizophora apiculata was 536.4 to 2,333.0 kg/tree, R. mucronata was 376.0 to 900.5 kg/tree, and Bruguiera spp. was 328.0 to 546.0 kg/tres. Estimation model on biomass of Bruguiera were 0.9450903501 D1.865827743 for stem biomass and 10.11259103 D 1.30096243 for total biomass, while those of R. apiculata were 0.2109981916 D 2.453342882 for stem biomass and  0.7574460068 D 2.232516567 for total biomass.
Keanekaragaman Genetik Rayap Tanah Genus Coptotermes (Isoptera: Rhinotermitidae) di Pulau Jawa Niken Subekti; Dodi Nandika; Dedy Duryadi Solihin
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 23, No 2 (2006)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2006.23.2.156

Abstract

Subterranean termite Coptotermes spp. has been known as the most economically important structural pest in Indonesia. Due to morphological ambiguity, traditional identification of Coptotermes spp. has always been difficult and unreliable.  Through molecular diagnostic method, a study was conducted to determine genetic variation of Coptotermes spp. occurring in Java Island.  Termite specimens were collected from Banten 1, Banten 2, DKI 1, DKI 2, Jabar 1, Jabar 2, Jateng 1, Jateng 2, Yogya 1, Yogya 2, Jatim 1, and Jatim 2.  The method for identification was PCR-Restriction Fragment Length Polymorphism (PCR-RFLP) analysis using four restriction enzymes each of which was applied to CO II amplicon for all the Coptotermes spp. being analyzed.  The results showed the existence of two species of Coptotermes in Java which are different from both Coptotermes gestroi and Coptotermes formosanus.
Studi Perilaku, Palatabilitas Pakan dan Bentuk Sarang Kesukaan Gelatik Jawa (Padda oryzivora) R. Susanti; Margareta Rahayuningsih; Nugroho Edi Kartijono; Andi Haryoko; Arif Rahman Hakim; Tri Oktaviantari
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 23, No 2 (2006)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2006.23.2.147

Abstract

A study was conducted to disclose the habit, food type palatability, and the nest type preference of gelatik jawa (Padda oryzivora). As many as 54 gelatik jawas from Surabaya, Malang, Ngawi, Bekasi, Karawang, Cirebon, Bogor, Semarang, Magelang, Yogyakarta and Prambanan were captured using soft nylon net and then caged for two weeks for adaptation. Each bird was given a ring to make it easier to identify. After the adaptation period, the birds were moved to a wider cage. Every day the habit and mating behaviour as well as the preference of food and nest were observed. The highest  frequency of daily feeding (997.75 ± 72.23) and moving (795.50 ± 138.27); and the lowest  frequency of daily self care (4.126 ± 138.27) and communicate (93.75 ±  7.59) were recorded at 08.00 – 10.00. Food palatability and preference over nest, habit, and biological clock of gelatik jawa could be the basis of ex-situ conservation. The monogamy character of gelatik jawa could also serve as the basis of ex-situ conservation that male and female in one cage must be in equal number.
Pengaruh Inokulasi Jamur Mikoriza Arbuskular Terhadap Penyakit Busuk Pelepah Pada Jagung Di Lapangan Soenartiningsih Soenartiningsih; Ambarwati Tj. Harsoyo; Nursamsi Pusposenjoyo; John Baco Baon
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 23, No 2 (2006)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2006.23.2.161

Abstract

Sheath blight caused by Rhizoctonia solani is one of the important diseases in corn. A study on the effect of arbuscular  mycorrhizal  fungi in controlling  sheath blight disease was conducted at pilot project scale in Jambangan Village, Malang District. Three-replicated treatments were arranged in a split-split plot design. The results   showed that highest attack intensity occured at treatments without inoculation of  arbuscular mycorrhizal fungi. The mean of attack intensity for Wisanggeni variety  was 70,05%, while that for GM 30 line was 73,79%. The attack intensity at Wisanggeni variety inoculated with arbuscular mycorrhizal fungi was 45.39% to 49.46%, while that at GM 30 line was 47.52% to 56.12%. The infection of sheath  blight disease reduced the production in terms of knob part and seed  weight even  though the plant was inoculated with arbuscular mycorrhizal fungi of Glomus sp. or  Acaulospora mellea. The reduction of knob weight at Wisanggeni variety was 14.2% to 15.0% and that of seed weight was 21.4% to 23,0%.  At GM 30 line the reduction of knob part was 12.0% to 17.2%, while that of seed weight was 19.1% to 20.4%.
Produksi Efipium Dafnia (Daphnia carinata King) dengan Pengaturan Fotoperiode dan Kepadatan Kultur Irsyaphiani Insan; Chumaidi Chumaidi
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 23, No 2 (2006)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2006.23.2.157

Abstract

Daphnia carinata King is a planktonic crustacean commonly used as natural food for freshwater fish. This experiment was conducted to evaluate the effect of different culture densities of daphnids and photoperiod on the ephippia production. Daphnids of different densities, i.e. 15, 20, and 25 individuals per 20 ml water media were cultured in small bottles.  The bottles were placed in a refrigerator and treated with two different photoperiods, i.e. 10.5 light hours : 13.5 dark hours (10.5:13.5) and 4 light hours : 20 dark hours (4:20).  All refrigerators were set at 12° C.  The experiment was arranged in a Complete Randomized Design with factorial treatments (3x2) replicated six times. The ephippia were colleted from every bottle for 45 days. The results showed that the photoperiod of 10.5: 13.5 and daphnid densities of 25 individuals per 20 ml produced most ephippia (12.1). Different culture density within the same photoperiod had no significant effect on ephippia production.
Keanekaragaman Tumbuhan Pakan Bagi Tapir (Tapirus indicus), Kijang (Muntiacus muncak), Kukang (Nycticebus coucang) dan Kondisi Habitat di Kawasan Gunung Tujuh, Taman Nasional Kerinci Seblat, Jambi W. Rosa Farida; Wirdateti Wirdateti; H. Dahruddin; G. Sumaatmadja
Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Vol 23, No 2 (2006)
Publisher : Fakultas Biologi | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.mib.2006.23.2.163

Abstract

A study on the diversity of feed plants of tapir (Tapirus indicus), barking deer (Muntiacus muncak), and slow loris (Nycticebus coucang) as well as their habitat condition has been conducted at Gunung Tujuh, Kerinci Seblat National Park, Jambi. Survey was carried out by visiting places where the animals are usually found and by taking collection of herbarium plant specimens of those animals’ feed.  The habitat of tapir is in a region of Gunung Tujuh forest up to the altitude of 2,020 m above sea level, while that of barking deer is in Gunung Tujuh forest  where dense bushes at the edges of forest until the altitude of 1620 m above sea level is favored and that of slow loris is in low region of forest. Thirty eight species belonging to 25 families of forest plants as feed resources for tapir, barking deer, and slow loris were found. Amaranthaceae, Anonaceae, Clusiaceae, Moraceae, and Myrsinaceae were recorded as feed plants for tapir, while Euphorbiacea, Fagacea, Lauracea, and Urticacea were for slow loris and Solanaceae was for barking deer.

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