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BERITA BIOLOGI

berita_biologi
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Published by Lembaga Ilmu Pengetahuan Indonesia

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Core Subject : Science, Agriculture,

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Articles 2,125 Documents

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ANALISIS VEGETASI POHON DI HUTAN HUJAN TROPIK HARAPAN, JAMBI Mansur, Muhammad; Triono, Teguh; Ismail, Ismail; Adi, Setyawan Warsono; Wahyu, Enu; Ismail, Gofar
BERITA BIOLOGI Vol 10, No 2 (2010)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Vegetation analysis of trees in Harapan Rainforest, PT.REKI, Jambi, was conducted on October-November 2009. Two 50m x 100m (0,5 ha) plots were established to obtain primary data for analysis. Plot one was made in the area of Medium Secondary Forest and plot two in the area of High Secondary Forest. Results shows that, the number of tree species were recorded from the two plots was 205 species from 550 individual trees with a total Basal Area (BA)= 64.75 m2. Plot one has 123 species from 284 individuals with BA = 10.82 m2 and Diversity Index (H)= -1.87. Bellucia axinanthera was recorded as the dominant species with Importance Value (IV)= 37.21%. Meanwhile, plot two has 126 species from 266 individuals with BA= 53.93 m2 and (H)= -1.97. Shorea acuminata was recorded as the dominant species with IV= 12.93%. Plot two (High Secunder Forest) has higher diversity of tree species than plot one (Medium Secunder Forest).The structure and composition of vegetation between plot one and plot two is different with similarity index for the two plots is only 21.46%.

EKOLOGI DAN PERSEBARAN GEWANG (Corypha utan Lamk.) DI SAVANA TIMOR, NUSA TENGGARA TIMUR Partomihardjo, Tukirin; Naiola, BP
BERITA BIOLOGI Vol 9, No 5 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

A study of the distribution and ecology of Corypha utan Lamk. (gewang) within the natural habitat of savana ecosystem at Usapisonbai village area, Kecamatan Nekamese, Kabupaten/Regency Kupang, East Lesser Sunda Islands was conducted to gain an understanding factors controlling distribution and dynamics populations of the species. Three plots with total of 2.1 ha were established at different sites. Reconnaissence throughout the study area revealed that gewang grows in the lowlands below 200 m altitude, but away from the immmediate vicinity of the sea. Populations were studied within different savana types. It was concluded that gewang appears to be relatively associated to the open areas. The abundance of gewang within the study area formed the main savana vegetation as savanna gewang type. Distribution pattern of gewang within the study area tend to be concentrated at the lower part of the plots in particular at relatively flat areas. Examination of seedling and sapling densities in relation to parent trees revealed a large number of propagules fallings to disperse, and in consequence tendencies toward dumb distributions. The seedlings tend to grow under dead parent tree and or at flat of lower areas. Based on the population structure, gewang revealed has good regeneration strategy with high population of younger stages.

AKTIVITAS ANTIOKSIDAN DAN ANALISIS KIMIA EKSTRAK DAUN JUNGRAHAB (Baeckeafrutescens L.) Murningsih, Tri
BERITA BIOLOGI Vol 10, No 1 (2010)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Extraction of Jungrahab (Baeckea frutescens L.) leaves was done by using organic solvent (ether). The antioxidant activity of the extract was investigated using l,l-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay. Ascorbic acid (vitamin C) was employed as a positif control. By virtue of their hydrogen donating ability, the extract and ascorbic acid exhibited reducing power.The extract was found has activity in free radical scavenging activity against DPPH. The antioxidant activity was supposed to be due to the composition of certain constituens e.g. 2,6-di(/-buthyl)-4-hidroxybenzoie acid (BHT-acid), 5,7-dihydroxy-6-methylflavanone and a-tocopherol (vitamin E) within the extract.

SISTEM SOSIAL JANTAN MONYET HITAM SULAWESI (Macaca nigra) DI CAGAR ALAM TANGKOKO-BATUANGUS, SULAWESI UTARA Saroyo, Saroyo
BERITA BIOLOGI Vol 9, No 5 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

A study on male social system of Sulawesi crested black macaque {Macaca nigra) has been conducted at Tangkoko-Batuangus Nature Reserve, North Sulawesi from January to October 2008.The aim of this research was to evaluate the male social system based on the social interaction among the males.The material was a habituated group called Rambo II that had 7 adult males and 19 adult females at early stage observation. Dominance hierarchy was determined with ad libitum sampling based on their results in agonistic interaction at 3 early-days of every month. The dynamics of the dominance hierarchy was traced during 10 months. Determination of dominance hierarchy linearity used Landaus index of linearity. Data of approaches among the males and their copulation frequency was collected with focal animal sampling.Approaches interaction data were analyzed for the direction of their approaches and the scoring of approachee responds that consisted of positive, neutral, negative, and without approaching.Results showed that during 10 months, there were 3 adult males that emigrated from Rambo II and one adult male that immigrated into the group.All dominance hierarchy had linearity indexes 1.0 that meant the hierarchies are perfect linear or linear and transitive.The a-male had highest frequency of copulation both with estrous and non-estrous females.For mid-rank male, on the other hand, the frequency was not always related to their rank. There was a tendency that dominate males approached subordinate males that was proved with their up/down index. Negative respond showed by subordinate males due to approaching by dominate ones was higher than the opposite. This result indicated that dominance played role in spatial controlling and freedom of interaction, for subordinate individual, the dominate presentating likely intimidated them. From those results, it can be concluded that the social system of male Sulawesi crested black macaque in not egalitarian and more despotic, different with the social system of the female that is considered as egalitarian.

PEMBUATAN STARTER UNTUK EKSTRAKSI MINYAK KELAPA MURNI MENGGUNAKAN MIKROBA AMILOLITIK Naiola, Elidar
BERITA BIOLOGI Vol 9, No 1 (2008)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

The thirteen isolates of amylolitic microbes had been tested their ability to extract the oil from " coconut milk" and nine of them could break the emulsion and separated the oil from the water and protein. The aim of this study was to find a starter that can be used for producing the coconut oil by using molase and "gula aer" gewang (Corypha utan Lamk.) palm sugar as the substrates.The result suggest that by using the isolates (ferm. 1 and ferm.2), "gula aer"gewang can be used as a substrate without supplemented by organic nitrogen. The starter prepared with isolate ferm. 1 containing cells of microbe about 10.2 x 10 cell/ml and prepared with ferm.2 about 9.0 - 10.2 x 10 cell/ml. After 4 weeks the amount of the cells decreased to 0.98 x 10 cell/ml and 0.90 x 10cell/ml, respectively, The amount of microbes were stable until 12 weeks.The starter conducted the fermentation processes at 40Â°C for 16 hours and produced the coconut oil. The extracted oil content about 85% saturated fatty acids and 42% of them was lauric acid. Another chemical component of the extracted oil were Iodine numbers, peroxide numbers and free fatty acid (FFA), they were 5.98%, 2.51 Meq/kg and 0.41%, respectively.

PENGARUH LAMA PENYIMPANAN, SUHU DAN LAMA PENGERINGAN KENTANG TERHADAP KUALITAS KERIPIK KENTANG PUTIH [Effect of Storage, Temperature and Drying Duration of Potato on Potato Chip Quality] Asgar, Ali; Kartasih, Asih; Supriadi, Asep; Trisdyani, Henna
BERITA BIOLOGI Vol 10, No 2 (2010)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

The purpose of this research was to study storage duration of potato, temperature and drying duration on the quality of Granola potato chips.This research was conducted at Postharvest Laboratory of Indonesian Vegetable Research Institute from May to November 2009. A Randomized Complete Block Design was used with two replications. First factor was storage duration of potato: 1 day, 4 and 7 days. Second factor was temperature: 40Â°C, 50Â°C and 60Â°C. Third factor was drying duration (16, 18, and 20 hours). The result showed that storage period of 1 day, drying temperature at 50Â°C for 20 hours gave the best quality of potato chip with better consumer preference. Good storage period of raw material, drying condition with appropiate temperature and time of drying could produce good quality of potato chip.

ANALISIS BEBAN PENCEMARAN DAN KAPASITAS ASIMILASI DANAU SENTANI, PAPUA SEBAGAIUPAYAKONSERVASI LINGKUNGAN PERAIRAN Walukow, Auldry F; Djokosetiyanto, D; KholiPdan, KholiPdan; Soedharma, Dedi
BERITA BIOLOGI Vol 9, No 3 (2008)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v9i3.777

The Lake Sentani has problems. Firstly, high of erosion number i.e. 94.52 ton/ha/year of which the value is higher than erosion tolerance at average 25 ton/ha/year.Secondly, high concentration of chemical pollution such as Cu (0.0201- 0.1081 mg/L) and Zn (0.21 - 0.36 mg/L) which these values are above water quality standard approved by the government as ruled in PP 82 Tahun 2001 about the management of water quality and water pollution. Therefore research and management are needed to find solution for the sustainability of this lake. The aims of this research is to be acquainted with carrying capacity of Lake Sentani through analyzing 1) the pollution load, and 2) the assimilation capacity of Lake Sentani aquaculture. The collected information is important for future aquaculture environmental management and conservation. Result shows that the pollution loads from river are obtained as follows (ton/month): TDS (441.806 to 775.287), BOD (3.510 to 7.801) and COD (7.737 to 16.055).The assimilation capacities from lake are obtained as follows (ton/month): TDS (12.18494), BOD (11.31973) and COD (122.4184).The number of pollution loads (TDS, BOD and COD) are under the assimilation capacity.

KEANEKARAGAMAN FAUNA IKAN EKOSISTEM MANGROVE DIKAWASAN TAMAN NASIONAL UJUNG KULON, PANDEGLANG-JAWA BARAT Wahyudewantoro, Gema
BERITA BIOLOGI Vol 9, No 4 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Fish fauna survey biodiversity was conducted in Ujung Kulon National Park, Pandeglang-West Java, to reveal fish diversity in mangrove ecosystem. Samples were caught using electrofish (12 V 10A), gill net (mesh sized 1-1.5cm) and fishing tackle.Result showed that there were 58 fish species belongs to 34 families and 43 genera Gobiidae was a dominant famili with 8 spesies, followed by Apogonidae, Chandidae, Lutjanidae and Serranidae each with 3 species. Cigenter river has highest diversity with H = 2.74, E=0.930, d = 5.346. Serinding fish (Ambassis dussumieri) was the highest abundance compared to others.

KARAKTERISASI 17 FAMILI IKAN NILA {Oreochromis niloticus) GENERASI KE TIGA (G-3) BERDASARKAN METODE TRUSS MORFOMETRIKS Nuryadi, Nuryadi; Ariiin, Otong Zenal; Gustiano, Rudhy; Mulyasari, Mulyasari
BERITA BIOLOGI Vol 9, No 1 (2008)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Objective of the study is to elucidate phenotype characters of nile tilapia (Oreochromis niloticus) of the third generation (G3)resulted from the selection breeding program in the Research Institute for Freshwater Aquaculture Bogor. Phenotypes of seventeen nile tilapia families, were observed using truss morphometric methods. The results showed that the composition average of standard lenght has low coefficient variation mean (10.42%) as well as coefficient variation of the truss measured characters (4.3- 13.3%). The highest index similarity of boddy shape within family was found in family 5 (79.3%), in contrast the lowest was in family 12 (32.3%). For index similarity between families, the highest score was in between family 12 and 17 (22.6).There were 8 characters enabled to differentiate the 17 families observed. They were Al, A3, A5, B2, C3, C5, C5, and D4. Cluster analyses recognized into 4 groups based on the phenotypic distance

PENINGKATAN KUALITAS NUTRISI TEPUNG DAUN LAMTORO SEBAGAI PAKAN IKAN DENGAN PENAMBAHAN EKSTRAK ENZIM CAIRAN RUMEN DOMBA Fitriliyani, Indira; Harris, Enang; Mokoginta, Ing; Nahrowi, Nahrowi
BERITA BIOLOGI Vol 10, No 2 (2010)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

The aim of this experiment is to evaluate the nutrient quality of leucaena leaf meal (LLM) with addition of sheep rumen fluid enzyme for nile tilapia feed and incubated in vitro either for 2 or 24 hours. This experiment was arranged in a completely randomized design with 6 treatments and 3 replications. Those treatments were enzyme levels of 0, 20, 40, 60, 80, and 100 ml/ kg LLM. Results showed that nutrient quality of LLM with addition of sheep rumen fluid enzyme that incubated for 24 hours had the best result compared to that incubated for 2 hours. This finding significantly affected (PO.05) on the increase of sugar release (76.97%), soluble glucose (21.27%) and soluble protein (37.7%). It is concluded that sheep rumen fluid enzyme has a great potential for improving nutritional quality of leucaena leaf meal of fish feed.

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