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INDONESIA
BERITA BIOLOGI
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Arjuna Subject : -
Articles 26 Documents
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Search results for , issue "Vol 17, No 2 (2018)" : 26 Documents clear
PROFITABILITAS DAN KERAGAAN PERTUMBUHAN BENIH IKAN Tor tambroides DENGAN FREKUENSI PAKAN YANG BERBEDA Jojo Subagja; Deni Radona
BERITA BIOLOGI Vol 17, No 2 (2018)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v17i2.3000

Abstract

Fish of Tor genus have a slow growth character that resulted in increasing production cost. The high production cost is related to the high price of feed. Fish growth can be triggered by an optimal feeding. A feeding strategy is needed to improve the efficiency of production cost. This study aimed to determine the profitability and the performance of the seedling thai mahseer fish with different feeding frequencies. This study was conducted in Germplasm Research Station, Cijeruk in March-April 2014. The fish used in the experiment have a standard length of 2.29 ± 0.12 cm and weight of 0.32 ± 0.07 g derived from induced breeding spawning of the broodstock natural catches which was adapted for four years in pond concrete. The fish were reared in the aquarium (dimension= 40 x 30 x 30 cm) with a water height of 20 cm and a stocking density of 50 individuals each. The experiment was designed by using three treatments and three replications for each treatment. Fish were feed using commercial feed (protein content = 28%) as much as 20% per day of the total biomass. The treatment observed was feeding frequency, namely (A) three times/day, (B) twice/day, (C) once/day. Results of the experiment for 40 days showed that the increasing values of length, weight, specific growth rate, survival rate, biomass and FCR were not significantly difference (P>0.05). The highest benefit value was obtained in the treatment of feeding with a frequency of three times/day (Rp. 332.304 ± 14.819,-).
HUBUNGAN PANJANG DAN BERAT, FAKTOR KONDISI , FEKUNDITAS, DAN PERKEMBANGAN TELUR IKAN TENGADAK (Barbonymus schwanenfeldii) DARI SAROLANGUN, JAMBI DAN ANJONGAN, KALIMANTAN BARAT, INDONESIA Irin Iriana Kusmini; Jojo Subagja; Fera Permata Putri
BERITA BIOLOGI Vol 17, No 2 (2018)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v17i2.3017

Abstract

Tinfoil barb (Barbonymus schwanenfeldii) is one of the potential local fish to be cultivated as a food or pet fish. The data and information of the growth pattern of species are essential for fish farming success. The observation on the length and weight relationship is an usefull indicator to determine the pattern of growth fish observed. This study aims to determine the growth patterns of tinfoil barb fish based on length and weight relationship, condition factor and fish fecundity of tinfoil barb from Sarolangun, Jambi and Anjongan, West Kalimantan. The 30 samples were taken randomly from each group. Data were analyzed using analysis regression Microsoft Excel. The result showed that the regression coefficient of length and weight relationship was 2.811 for Sarolangun and 2.686 for Anjongan. The regression value indicates that the the growth of tinfoil barb was allometric negative, with an average factor condition ranged from 0.99 to 1.002. Length and weight relationship had determinant value (R2) ranged from 0.79 to 0.96, with the fecundity ranged from 20168 to 232.040 eggs from 9–45.5g of gonad weight. 
FISIOLOGI PERTUMBUHAN, POTENSI AKTIFITAS PRODUKSI N2O DAN GEN FUNGSIONAL PENYANDINYA PADA BEBERAPA ISOLAT BAKTERI DENITRIFIKASI Dwi Agustiyani; Nur Laili; Sarjiya Antonius
BERITA BIOLOGI Vol 17, No 2 (2018)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v17i2.2340

Abstract

Physiological characters of four denitrifying bacteria (Bacillus sp. CPNS, Bacillus thuringiensis UPT1, Brevundimonas diminuta EA1 and Bacillus sp. UPSB) were studied based on the growth ability on various nitrate concentrations and the production of N2O gas. The characters of denitrifying bacteria were also evaluated through the existence of functional genes nirS and nosZ, encoding the nitrite reduction and nitrous oxide reduction enzymes which have important role on denitrification processes. The study showed that Bacillus sp. UPSB and Bacillus sp. CPNS isolates have a linear growth with the increasing concentration of KNO3. The N2O gas production of Bacillus sp. UPSB isolate was relatively high, about 70 ?/l, Bacillus sp. CPNS isolate was 25?/l, while the Bacillus thuringiensis UPT1 isolate was 5 ?/l and Brevundimonas diminuta EA1 isolate was 8 ?/l. It was also indicated that both Bacillus sp. UPSB and Bacillus sp. CPNS had high deninitrification activities. It was confirmed that all isolates were contained functional gen of nirS and nosZ.
KERAGAMAN BEBERAPA TUMBUHAN CIPLUKAN (Physalis spp.) DI LERENG GUNUNG KELUD, JAWA TIMUR Nugraheni Hadiyanti; Supriyadi Supriyadi; Pardono Pardono
BERITA BIOLOGI Vol 17, No 2 (2018)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v17i2.3238

Abstract

Ciplukan (Physalis spp.) is a wild plant which is that potentially used as a medicinal plant. Information related to the diversity of Physalis spp. in Indonesia is limited. The objectives of the research was to identify the diversity of wild Physalis sp. on Mt. Kelud, East Java based on morphological characters, total protein profiles, and flavonoid compounds. The research was conducted by survey on some gradients viz. 200–400, 400–600, 600–800, 800–1,000 and >1,000 m above sea level. Identification of morphological characters was focused on root, stem, leaf, flower and fruit covering 16 characters for scoring. Identification of total protein profile was performed by SDS-PAGE method and the flavonoid compound was analyzed using UV spectrophotometric method based on the colorimetric principle. The degree of diversity of Physalis spp. was determined based on morphological similarity and total protein profiles through cluster analysis. The results showed that Physalis spp. on Kelud was found up to 1,000 m above sea level. Altitude affected to the morphological diversity, total protein profile and the flavonoid compound. Morphological features that play a role in the diversity of Physalis sp. were the direction of growing stems, leaf shape, leaf margin, leaf surface, leaf stalk color, stain color on the inner neck of thr flower, and fruiting calyx color. Expression of total protein P. minima. shows similarity to P. angulata L. Physalis sp. in the low gradient have a higher flavonoid compound as compared to the middle and high gradients. There were two species of Physalis found on the gradient of Mt. Kelud, East Java, namely Physalis minima L. and Physalis angulata L.
PAKET PEMUPUKAN WORTEL PADA TANAH LEMPUNG LIAT BERPASIR DATARAN RENDAH DI PALANGKA RAYA - KALIMANTAN TENGAH Muhammad Anang Firmansyah; Wiwik Rahayu; Twenty Liana
BERITA BIOLOGI Vol 17, No 2 (2018)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v17i2.2838

Abstract

Carrot (Daucus carota L.) is generally cultivated at uplands areas. However, for lowlands, technology of innovation related to fertilizing can be considered as the solution. This study was aimed to determine the appropriate fertilizer package, the variety of carrot adapted in rainy season, and sandy clay loam of the lowland areas in Palangka Raya, Central Kalimantan. This study was designed by using a split plot exponential design consisting of main plot consisting of carrot varieties: (V1 = Kirana and V2 = Lokal Batu) and sub-plot, consisting of fertilizer packages (P0 = control, P1 = low. P2 = medium, P3 = High). The results showed that variety of Lokal Batu was more adaptive than Kirana for having higher tuber production. 16.95 g/plant (10.12 t/ha) and 16.33 g/plant (9.80 t/ha). The result showed that the highest production of 18.89 g/plant was obtained in a medium fertilizer package as compared to other fertilizer package. There was no significant interaction between carrot varieties and fertilizer packages. The trend showed that the fertilizer packages of P2 produced the highest yield of total weight of tuber production within each carrot variety of 10.36 ton/ha for Kirana and 12.31 ton/ha for Lokal Batu.
PERTUMBUHAN DAN PRODUKSI TEBU (SACCHARUM OFFICINARUM; POACEAE) PADA BERBAGAI PAKET PEMUPUKAN DI LAHAN KERING BERPASIR Supriyadi Supriyadi; Nunik Eka Diana; Djumali Djumali
BERITA BIOLOGI Vol 17, No 2 (2018)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v17i2.2287

Abstract

Improvement of cultivation technology is a part of the sugarcane intensification programs to supply the national sugar demand. Fertilization package is one component in of the of cultivation technology improvement. The research aims to obtain the information on (1) the role of Ca + Mg versus Sulfur nutrients, (2) the integration of low-dosage compound fertilizers with manure versus high-dosage compound fertilizers without manure, and (3) moderate-dosage versus very high-dosage of compound fertilizer without manure in improving productivity, sugar yield and economic benefits in sandy upland. The research was conducted in November 2012 - October 2013 at Asembagus Experimental Station, Situbondo, East Java. Four fertilizer packages was arranged in a Randomized Block Design and replicated three times. Data were analyzed by orthogonal contrast. The results showed that package of compound fertilizer containing Ca + Mg inccreased productivity (11,67%), sugar yield (15,51%) and economic benefit (293,3%) from the package of fertilizer without containing Ca + Mg with high-dosage Sulfur. Package of high-dosage compound fertilizer containing Ca + Mg without manure inccreased productivity (5.82%), sugar yield (8.26%) and economic benefit (54%) from package of low-dose fertilizer + manure. Package of very high-dosage compound fertilizer containing Ca + Mg inccreased productivity (32%), sugar yield (31,32%) and economic benefit (347,7%) from moderate-dosage fertilizer package.

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