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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 14 Documents
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Search results for , issue " Vol 11, No 3 (2012)" : 14 Documents clear
STRUKTUR KOMUNITAS IKAN INTRODUKSI DI DANAU BATUR, BALI [Community Structure of Introduced Fish in Lake Batur, Bali] Sentosa, Agus Arifin; Wijaya, Danu
BERITA BIOLOGI Vol 11, No 3 (2012)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (218.33 KB) | DOI: 10.14203/beritabiologi.v11i3.503

Abstract

Lake Batur is the largest lake in Bali island, however information on introduced fish community is not available yet. The research aimed to identify the community structure and ecological status of the introduced fish in Lake Batur, Bali. The study was carried out on May, July and October 2011 using survey method. The fishes were obtained using experimental gill nets and by fishermen. Data analysis included index of diversity, evenness, dominance, species richness and the abc (abundance-biomass comparison) curve. The results showed the tilapia (Oreochromis niloticus) was the dominant species. The status of introduced fish community suggested to ecological stress but it was relatively undisturbed.
STRUKTUR DAN KOMPOSISI VEGETASI SEKITAR SARANG PENYU HIJAU (Chelonia mydas Linnaeus) PANTAI PANGUMBAHAN, SUKABUMI SELATAN, JAWA BARAT [Vegetation Structure and Composition of Green Turtle (Chelonia mydas Linnaeus) Nests in Pangumbahan Coastal Area, Southern Sukabumi, West Java] Roemantyo, Roemantyo; Nastiti, Adriani Sri; Wiadnyana, Ngurah N
BERITA BIOLOGI Vol 11, No 3 (2012)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v11i3.508

Abstract

Pangumbahan coastal area is one of many important nesting sites of the green turtle (Chelonia mydas Linnaeus) in Indonesia. This area is mainly comprises of disturb coastal old secondary forest. Some sites along the seashore were converted into fishpond, dry land agricultural and other was destroyed for other uses or as an open unproductive areas. However this area has a still plays an important role especially for the conservation of green turtle habitat and also for the ecosystem stabilization of the coastal area in general. Floristic research was conducted on September 2009 to investigate the existing vegetation structure and composition along the seashore using transects method.The “point center quarters method” was used to calculate the importance value of the vegetation on every turtle nesting sites. The important natural species vegetation communities in the area were comprises of herbs, shrubs and trees species. Ipoemoea pes-caprae (L.) R. Br and Spinifex littoreus (N. L. Burman) Merrill as a first layer coastal line plant community that play as an important herbs species which creeping grown on the white sands coastal surface. The second layer comprises herbs, small trees and shrubs such as Pandanus tectorius Parkinson ex Zucc, Crinum asiaticum L. and Callotropis gigantea R.Br. The second layer species plays as a vegetation community which covering and protecting the green turtle nest site from the direct sunshine, running of big wave and heavy rain water. Terminalia catappa L., Calophyllum inophyllum L., Barringtonia asiatica (L.) Kurz. and Hibiscus tiliaceus L. as a big crown tree community grown covering on the most behind as a back layer of coastal line which play as shading trees of the second layer species community, especially to stabilized humidity and temperature of the sand and the environment. The vegetation structure and composition of the old secondary coastal forest of Pangumbahan was described to understand the detail role and function of the vegetation species in this area.
INFEKTIFITAS Spodoptera exigua NUCLEOPOLYHEDROVIRUS (SeNPV) YANG DIPERKAYA DENGAN BAHAN PENGAKTIF TERHADAP LARVA Spodoptera exigua Huebner [The Infectivity of Spodoptera exigua Nucleopolyhedrovirus (SeNPV) Enriched with the Enhancer to the Spodoptera exigua Huebner Larvae] Samsudin, Samsudin; Santoso, Teguh
BERITA BIOLOGI Vol 11, No 3 (2012)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (102.084 KB) | DOI: 10.14203/beritabiologi.v11i3.499

Abstract

Spodoptera exigua Huebner nucleopolyhedrovirus (SeNPV) is an entomophathogenic virus of onion caterpillar S. exigua larvae commonly used as bioinsecticide. The major limitations of SeNPV for biocontrol of onion caterpillar is it requires long time for the virus to kill the insect host. This research was aimed to find out the material as phagostimulant to increase the infectivity of SeNPV and to determine the optimum boric acid concentration as an enhancer for SeNPV activities. This research was conducted at laboratory using Cipanas isolate of SeNPV and third instar of S. exigua larvae. Phagostimulant used are 5% ofsucrose, soybean sauces, molases, sugar and turmeric filtrate,and the enhancers used are 0,1%, 1%, 5% and 10% concentration of boric acid. This result indicated that soybean sauces and sucrose increased S. exigua consumption and enhanced the infectivity of SeNPV. When mixed with polyhedra of SeNPV, 1% to 5% sucrose significantly increased S. exigua consumption and increased the infectivity of SeNPV, while 10% sucrose tended to decrease the feeding of S. exigua. Boric acid enhanced the infectivity of SeNPV. However, the increase of boric acid concentration should be restricted maximum at 5% for avoiding the negative impacts on the environment.
KORELASI ANTAR-KARAKTER DAN SIDIK LINTAS ANTARA KOMPONEN HASIL DENGAN HASIL BIJI KACANG HIJAU (Vigna radiata (L) Wilczek) [Correlation Among Characters and Path Analyses Between Yield Components with Grain Yiled on Mungbean (Vigna radiata (L) Wilczek)] Hakim, Lukman; Suyamto, Suyamto
BERITA BIOLOGI Vol 11, No 3 (2012)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (174.326 KB) | DOI: 10.14203/beritabiologi.v11i3.504

Abstract

A total of 10 mungbean (Vigna radiata (L.) Wilczek) genotipes including check variety (Vima) were evaluated on rainfed after rice at Ngale Experimental Farm, Ngawi, East Java during early dry season of 2010. The experiment was conducted in randomized complete block design with three replications. Plot size was 4 m x 5 m, plant spacing was 40 cm x 20 cm, each hill contained two plants. A correlated and path coefficient analyses were used in order to determine the association among characters and quantify the direct and indirect effects of agronomy traits on seed yield. The study has identified 2 promising lines, i.e. MMC342d-3-4 and MMC342d-kp-3-3 produced the highest yield of 2.2 t and 2.0 t/ha respectively and had good adaptation on rainfed. Two varieties (Kutilang and Kenari) having large seed size (>7.5g/100 seed). Therefore, these varieties can be used as source of parents on breeding program. Among the agronomic characters, number of pods per plant, number of seeds per pod and seed size were positively and significantly correlated with grain yield. The direct effect of number of pods per plant, number of seed per pod and seed size to grain yield as indicated by path coefficient were the highest, while other causal effects to grain yield were small or negative. Based on both analyses, mungbean genotipes with high grain yield should have high number of pods per plant, number of seeds per pod and large seed size. Therefore, number of pods per plant, number of seeds per pod and seed size can be suggested for selection criteria in selecting high yield mungbean genotipes on rainfed.

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