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HAYATI Journal of Biosciences

hayati
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Published by Institut Pertanian Bogor

ISSN : 19783019 EISSN : 20864094 DOI : -

Core Subject : Science, Agriculture,

Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

HAYATI Journal of Biosciences (HAYATI J Biosci) publishes articles and short communication in tropical bioscience fields such as development, biotechnology, biodiversity and environmental issues. HAYATI J Biosci covers wide range of all life forms topics including virus, microbes, fungi, plants, animal and human. HAYATI J Biosci has been also indexed/registered in Crossref, DOAJ, CABI, EBSCO, Agricola and ProQuest.

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Articles 6 Documents

Search results for , issue "Vol. 21 No. 3 (2014): September 2014" : 6 Documents clear

Physical Growth of Sasak Children at Different Altitudes in Lombok Island NOVITA TRI ARTININGRUM; BAMBANG SURYOBROTO; TETRI WIDIYANI
HAYATI Journal of Biosciences Vol. 21 No. 3 (2014): September 2014
Publisher : Bogor Agricultural University, Indonesia

The physical growth that occurs in schoolage children is makes this period one of the most important phases in the human life cycle. Within this period, puberty is indicated by growth spurts that increase both stature (BH) and bodyweight (BW). The focus of this research is to evaluate the age-related body size variation in Sasak children living at different altitudes on the island of Lombok, Indonesia: low, medium, and high. Our results showed that children living at low altitude were taller and heavier than children of the same age living at medium and high altitudes. Up until the onset of puberty, the children at medium altitude have similar stature and weight to those residing at high altitude, but they are shorter and lighter thereafter. There were significant differences in the height and weight of girls in different altitude locations, but no significant difference for boys. The effect of SES on child growth can be comparison between Sasak and other populations in Indonesia. In general, the Sasak children are shorter and lighter than children of the same age in urban populations, and relatively similar in size to the children in rural populations. Indicators of socioeconomic status such as family income and parental education were shown to be more influential factors in the differentiation of physical growth between populations than the altitude factor

Increasing Hermaphrodite Flowers using Plant Growth Regulators in Andromonoecious Jatropha curcas . DASUMIATI; . MIFTAHUDIN; . TRIADIATI; ALEX HARTANA; DIBYO PRONOWO
HAYATI Journal of Biosciences Vol. 21 No. 3 (2014): September 2014
Publisher : Bogor Agricultural University, Indonesia

Jatropha curcas (JC) is a crop with potential for use in biodiesel. Production of biodiesel requires plant seed as raw material, so the viability of JC for use in biodiesel will dependent greatly on the plant’s production of flowers. Generally, this plant is monoecious, meaning it has both male and female flowers. However, very rarely JC plants may be andromonoecious. Andromonoecious specimens of JC produce hermaphrodite and male flowers in the same plant. The number of hermaphrodite flowers per inflorescence is generally low compared to the number of male flowers. The aim of this study was to increase the proportion of hermaphrodite flowers by using plant growth regulators (PGRs) in andromonoecious JC. Our experiment was conducted in Randomized Block Design (RBD) with 9 treatments, namely kinetin, GA3, and IAA with concentrations of 0 ppm as a control, 50 and 100 ppm of each PGRs. The treatments were applied to stem cuttings from each plant and repeated 4 times. PGRs were applied by spraying the leaves within the buds of each plant. Applications took place weekly beginning when the plants entered flower initiating phase, until inflorescence produced. Observations were conducted during the treatment period (10 weeks). Results showed that plants treated with IAA, GA3, and kinetin at 50 and 100 ppm produced increased inflorescence per plant. The increases measured were 155.4 and 92.9% of (IAA), 120.4 and 151% (GA3), 96.6 and 51.7% (kinetin) respectively. In addition we found that application and GA3 at concentrations of 50 and 100 ppm, and kinetin at 50 ppm, increased the number of hermaphrodite flowers per inflorescence by 50%, and increased the number of hermaphrodite flowers per plant by 275.6 and 183.1% (IAA), 219.5 and 254.1% (GA3), 162.9 and 103.1% (kinetin) respectively. As would be expected, the number of fruit per plant increased in those specimens treated with IAA, GA3, and kinetin at 50 and 100 ppm. The increases measured were 301.7 and 167.4% (IAA), 211.7 and 257.0% (GA3), 162.5 and 101.4% (kinetin) respectively.

The Time Budget of Javan Deer (Rusa timorensis, Blainville 1822) in Panaitan Island, Ujung Kulon National Park, Banten, Indonesia . Pairah; YANTO SANTOSA; LILIK BUDI PRASETYO; ABDUL HARIS MUSTARI
HAYATI Journal of Biosciences Vol. 21 No. 3 (2014): September 2014
Publisher : Bogor Agricultural University, Indonesia

Javan deer that exist in Panaitan Island was reintroduced from Peucang Island during 1978-1982. We observed behavior of the reintroduced Javan deer inhabiting Panaitan Island. Javan deer in this island spent most of their diurnal time for feeding. There were no significant differences between all age-sex variation for all activities pattern. The behavior of Javan deer was influenced by age, sex, social group, temperature, and food availability.

The Use of Synbiotics to Prevent IMNV and Vibrio harveyi Co-Infection in Litopenaeus vannamei ADNI OKTAVIANA; . WIDANARNI; MUNTI YUHANA
HAYATI Journal of Biosciences Vol. 21 No. 3 (2014): September 2014
Publisher : Bogor Agricultural University, Indonesia

This study evaluated the effects on viral immune responses and bacterial co-infection, of different feeding frequencies of a synbiotic supplemented diet given to Pacific white shrimp (L. vannamei). A synbiotic-supplemented diet was formulated from probiotic Vibrio alginolitycus SKT-bR and prebiotics from sweet potato (Ipomoea batatas L.) oligosaccharide. Pacific white shrimp were fed the synbiotic diet at different frequencies, i.e. daily (P1), twice a week (P2), and once a week (P3) for a 30 day pre-challenge test. After the 30 day feeding period, the shrimps were challenged by intramuscular injection of Infectious Myonecrosis Virus (IMNV) and Vibrio harveyi. The results showed that shrimp treated with a synbiotic-supplemented diet showed significantly higher growth performance than control groups (P<0.05). Shrimp treated under regime P1 showed the highest values for phenoloxidase (PO) and respiratory burst (RB) parameters compared to shrimp given the other treatments. Following the challenge test, higher survival rate were seen in the P1 treatment group, in comparison to the positive control, and the P1 treatment group showed the highest values in total haemocyte count (THC), PO, and RB.

Nesting Sites Apis cerana Fabr. (Hymenoptera: Apidae) in Two Different Altitutes of Polyculture Plantations in West Sumatera . JASMI; SITI SALMAH; . DAHELMI; . SYAMSUARDI
HAYATI Journal of Biosciences Vol. 21 No. 3 (2014): September 2014
Publisher : Bogor Agricultural University, Indonesia

Natural cavities in polyculture plantations are important for the conservation of honeybees. This study was aimed to determine the diversity, nest sizes, and fluctuations in the use of sites for nesting by Apis cerana Fabr. in polyculture plantations in two altitudes in West Sumatra. A census method was used to obtain the data variables in 10 plantations (five locations for each altitute). Polyculture plantations used as the study sites were dominated by coconut in lowland areas and coffea in highland areas. The results showed that nesting sites of Apis cerana were found amongst 18 species of plants belonging to 15 families (12 species in lowlands and seven species in highlands). Most of the nests were placed on Cocos nucifera (coconut) treesin lowland sites, and on Erythria variegata (dadap) in highland sites. Nests were also found to be located mostly in the cavities of trees with diameter 21-60 cm. Nest entrances were located at 228.31 cm above ground surface (ags) in highland and at 116.04 cm agsin lowlands. The nest entrances in highlands measured 12.21 by 3.73 cm (height and width), and in the lowlands 14.93 by 7.36 cm. The percentage of tree cavities used for nesting was statically higher in lowland (40.73%) compared to high land (17.86%), but it fluctuated very slightly in both high or lowland areas during observation. The percentage of trees with nests decreased in December and January but increased in February, with the same patterns found in both high and lowlands. Our research suggests that higher tree diversity in polyculture plantations promotes increased use by honeybees for nesting. Thus, the more tree diversity in polyculture plantations the better it could conserve natural honey bees populations.

Identification of Antibiotic-Resistance Genes from Lactic Acid Bacteria in Indonesian Fermented Foods LINDA SUKMARINI; APON ZAENAL MUSTOPA; MARIDHA NORMAWATI; IKRIMAH MUZDALIFAH
HAYATI Journal of Biosciences Vol. 21 No. 3 (2014): September 2014
Publisher : Bogor Agricultural University, Indonesia

Lactic acid bacteria (LAB) are known to have an important role in food fermentation and are thought to have health-promoting abilities such as probiotic properties. In this study, LAB were isolated from Indonesian fermented foods such as dadih (fermented buffalo milk), tempoyak (fermented durian), bekasam (fermented meat), and tape ketan (fermented glutinous rice). Those isolates were investigated for their resistance to two antibiotics: chloramphenicol and erythromycin. Recent efforts in food science have sought to identify genetic markers for antibiotic resistance within LAB strains, so that these genes can be selected for genetic modification. Such research is presently being directed toward the development of food-grade vectors (plasmid). The aim of this study is to screen LAB isolated from Indonesian traditional fermented foods, for chloramphenicol and erythromycin resistance. In this study, a total of 120 LAB samples were taken from traditional Indonesia fermented foods, and were tested for resistance to chloramphenicol and erythromycin. The results show that three LAB strains remained resistant to doses of up to 5 μg/mL chloramphenicol, while the LAB strain Lactobacillus plantarum showed resistance to the antibiotic erythromycin up to a concentration of 15 μg/mL.

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