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INDONESIA
JURNAL BIOLOGI INDONESIA
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : 08544425     EISSN : 2338834X     DOI : -
Core Subject : Science,
Biochemistry, Genetics & Molecular Biology
Arjuna Subject : -
Articles 847 Documents
 70   71   72   73   74 
PENGARUH PERBEDAAN WAKTU AWAL PEMBERIAN PAKAN BUATAN TERHADAP PERTUMBUHAN DAN AKTIVITAS ENZIM PENCERNAAN LARVA IKAN KERAPU BEBEK CROMILEPTES ALTIVELIS (VALENCIENNES 1828) Melianawati, Regina; Pratiwi, Rarastoeti; Astuti, Ni Wayan Widya
JURNAL BIOLOGI INDONESIA Vol 8, No 2 (2012): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v8i2.3055

Abstract

The effect of different initial time of artificial feeding to the growth and the activities of digestive enzymes of humpback grouper larvae Cromileptes altivelis (Valenciennes 1828).Humpback grouper is an economically marine finfish commodity, so it is important to scale up its culture. In aquaculture, feed is dominantly affecting to fish growth. Besides live feeds, theartificial feed is also given to fulfill the need of nutrient for larvae. However, the capability of larvae to digest the artificial feed is still limited because of its simplicity and immaturity of digestive system structure. Digestive enzymes are a biological indicator to figure out the capability of larvae to digest the artificial feed. This research was conducted to find out the influence of different initial time of artificial feeding to the growth and digestive enzyme activity of humpback grouper larvae. Larvae rearing were done in hatchery. Larvae were fed with live feed rotifers started in the evening of the second day. The treatment given in this research was the difference initial time of artificial feeding, i.e: (A) given at 8 days old larvae and (B) given at13 days old larvae. The variable observations were the growth and digestive enzyme activity of larvae. The results indicate that the different initial time of artificial feeding influenced to thegrowth and digestive enzyme activity of humpback grouper larvae. Total length, body weight, length of dorsal spine and ventral spine of 30 days old humpback grouper larvae on treatment A were 17.47±2.35 mm, 0.11±0.04 g, 6.83±0.45 mm and 5.07±0.50 mm, respectively, while on treatment B were 13.23±2.53 mm, 0.04±0.02 g, 5.73±1.11 mm and 4.48±0.50 mm, respectively. Up to 30 days old larvae, protease and amylase enzymes activities of larvae on treatment A was higher than on treatment B, while lipase enzymes activity of larvae on treatment B was higher than on treatment A. Therefore, the different initial time of artificial feeding gives the different effect on the growth and the activities of protease, amylase and lipase enzymes of humpback grouper larvae.Key words: artificial feed, growth, digestive enzyme activity, humpback grouper, larvae
STRUKTUR VEGETASI DAN SIMPANAN KARBON HUTAN HUJAN TROPIKA PRIMER DI BATANG TORU, SUMATRA UTARA Onrizal, Onrizal; Ismail, Ismail; Perbatakusuma, Erwin A.; Sudjito, Herwasono; Supriatna, Jatna; Wijayanto, Iwan H.
JURNAL BIOLOGI INDONESIA Vol 5, No 2 (2008): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v5i2.3197

Abstract

ABSTRACTVegetation structure and carbon stock of primary tropical rain forest at Batang Toru, NorthSumatra. Deforestation and forest degradation contribute for 20 to 25 percent of annual totalcarbon dioxide (CO2) emissions and to be one of substantial factor of climate change or globalwarming. Avoided deforestation into carbon-market regime by reducing emission fromdeforestation and forest degradation (REDD) scheme has been agreed on COP 13 of UNFCCCthat was held in Bali on December 2007. REDD application need reliable scientific basic aboutthe amount of carbon storage in well managed natural forest. The aims of this research were todetect vegetation structure and to estimate aboveground biomass, carbon stock and CO2absorption of primary tropical rain forest at Key Biodiversity Area of Batang Toru ForestBlock, North Sumatra Province by existing allometric equation. We designed 20 sampling plotsof 20 x 20 m in two forest area, i.e. Aek Game-game forest and Aek Silemes forest. All trees 5 cmat diameter at breast height (dbh) and above were measure and identified. From the study, thedistribution of diameter class formed ?L? curve which mean an indication as balanced forest.The aboveground biomass of the forest is 544.4 to 583.0 t/ha in Aek Silemes forest and 604.5 to613.6 t/ha Aek game-game forest. It is equivalent with 272.2 to 291.5 t C/ha or 999.0 to 1,069.9 tCO2/ha in Aek Silemes forest and 302.2 to 306.8 t C/ha or 1,109.2 to 1,125.9 t CO2/ha in Aekgame-game forest. More of carbon stock (>46% for Aek Silemes forest and >58% for Aek gamegameforest) saved within dbh of trees 50 cm and above. Therefore, sustainable managementof forest ecosystem is very important to reduce CO2 emission from deforestation and forestdegradation and to improve the function of forest ecology and economy.Keywords: aboveground biomass, carbon stock, CO2, primary tropical rain forest, BatangToru-North Sumatra
KARAKTERISASI KWETIAU BERAS DENGAN PENAMBAHAN TEPUNG TAPIOKA DAN TEPUNG JAMUR TIRAM Saskiawan, Iwan; Sally, Sally; Kiyati, Warsono El; Widhyastuti, Nunuk
JURNAL BIOLOGI INDONESIA Vol 14, No 2 (2018): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v14i2.3742

Abstract

ABSTRACTKwetiau is an Indonesian noodle which made from  rice flour. It has character of  less chewy and low nutrients. The addition of tapioca in kwetiau is hope to be able to improve the chewy texture. Furthermore the addition of oyster mushroom powder could increase its nutritional values. This study aimed to reveal  the effect of steaming time as well as addition of tapioca, and oyster mushroom powder on physical and chemical characteristics of kwetiau. The concentrations of tapioca and oyster mushroom powder are consecutively 0%, 10%, 20%, 30%, and 0%, 5%, 10%, 15%, with 4, 5, and 6 minutes steaming time. Determination of sensory, texture, cooking loss, testing, color, protein, crude fiber, and dietary fiber testing are conducted in this research. The result showed that there are an influences of steaming time, tapioca and oyster mushroom powder concentration on kwetiau?s physical and chemical characteristic as well as consumer preferences. The selected formulation is the kwetiau with 20% tapioca addition, steamed for 4 minutes, and 10% oyster mushroom powder addition. Keywords: Kwetiau, Oyster Mushroom, Rice Flour, Tapioca 
PRODUKTIVITAS DAN SERAPAN NUTRIEN HARIAN SPIROGYRA SP. DAN HYDRODICTYON SP. Pratiwi, Niken Tunjung Murti; Ayu, Inna Puspa; Nugraha, Bayu
JURNAL BIOLOGI INDONESIA Vol 12, No 1 (2016): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v12i1.2325

Abstract

This research aimed to analyze the potency of primary productivity (PP) and daily nutrients uptake ofSpirogyra sp. and Hydrodictyon sp. The research was conducted using Randomized Block Design andCompletely Randomized Design. Randomized Block Design was used to determine the difference of PP ofboth filamentous microalgae in different time periods. Completely Randomized Design was used to determinethe difference of daily net primary productivity and total amount of nutrients utilization by both filamentousmicroalgae in the same light intensity. The observations showed that Spirogyra sp. dan Hydrodictyon sp. hassame PP (p>0,05), both in total (daily) and time periods. The morning PP of two filamentous microalgae weredifferent from the daylight (p<0,05), and the daylight has different value from the afternoon (p<0,05), but therewere similar value of PP between morning and afternoon (p>0,05). Spirogyra sp. and Hydrodictyon sp. hassimilar capability in uptaking nutrients daily and in time periods observations (p>0,05).Keywords: Hydrodictyon sp., nutrients, primary productivity, Spirogyra sp.
STRUKTUR DAN KOMPOSISI VEGETASI HUTAN SEMUSIM HABITAT CURIK BALI (LEUCOPSAR ROTHSCHILDI STRESEMANN, 1912) DI KAWASAN LABUAN LALANG, TAMAN NASIONAL BALI BARAT Roemantyo, Roemantyo
JURNAL BIOLOGI INDONESIA Vol 7, No 2 (2011): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v7i2.3121

Abstract

ABSTRACTVegetation structure and composition of Bali Starling (Leucopsar rothschildi Stresemann,1912) Habitat at Labuan Lalang monsoon forest, Bali Barat National Park. Research wasconducted in Labuan Lalang monsoon forest, Bali Barat National Park in May 2010 to identifytheir vegetation structure and composition of plant species communities in this area. Thisinformation was important as basic data for developing model for habitat reconstruction ofendemic Bali starling birds (Leucopsar rothschildi Stresemann 1912). Several ecologicalparameters information such as name species, frequency, density and abundance of individualspecies were collected for qualitative an quantitative analyses.The result showed that 93 species belonging 84 genera and 37 families were found in this area.Some plant species were recorded as endangered such as Strycnos lingustrina, Helicteresixora, Protium javanicum, Rauvolfia serpentina, Zanthoxylum rhetza, Ziziphus rotundifolia,Ceriops tagal, Flacourtia indica, and Santalum album. The important species that composedin this forest were dominated by Grewia ericocarpa , Schoutennia ovata (Tiliaceae) andfollowed by Vitex trifoliata and Abutilon indicum. The species diversity and evenness indexof Shannon-Wiener indicated that species diversity in this forest were not too high and thepopulations on unstable condition. Principal Coordinat Analyses (PCO) on the tree height andaltitude data of every tress showed that tree species associated to Bali starling were found onthe 10 ? 25 m tree hiehgt community and occupied in the area of 40 ? 60 m asl. The problems andreal condition of the area as the habitat of Bali starling were discussed in this paper.Key words: vegetation, species diversity, Bali starling, Bali Barat National Park
PENGARUH KOMPOS DAN BERBAGAI PUPUK HAYATI TERHADAP PERTUMBUHAN DAN HASIL TEMULAWAK (CURCUMA XANTHORRHIZA) Sugiharto, A.; Widawati, Sri
JURNAL BIOLOGI INDONESIA Vol 3, No 9 (2005): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v3i9.3280

Abstract

ABSTRACTThe Influence of Compos and Several Biofertilizers on the Growth and the Harvesting ofTemulawak (Curcuma xanthorrhiza). Curcuma xanthorriza is one of the potentialmedicinal plants. Usually this plant is planted only as additional plant among the mainhorticultural plants. This plant is used as medicine plant, and usually grown not in fertile soils.So, this research tried to use the additional fertilizer such as compost and the potentialmicrobes. The aim of the research was to know the influence of the compost and the potentialisolates on the growth of the Curcuma xanthorrhiza. The research had been done at the greenhouse with Randomized Completely Design, by using polybag with 20 cm diameter. Therewas three replications. The results analyzed with ANOVA method, and Duncan Test at 0,05.The used soil was podsolik yellowish red that collected from Darmaga, Bogor. The resultshowed that the use of compost and biofertilizer increased the harvesting of the tubers from15,76% to 52,79%. The using of either BPP isolates or the mycorrhyza, increased the driedweigh of tubers of Curcuma xanthorrhiza.Keywords : Compost, potential microbes, Curcunla xanthorrhiza
KEPADATAN IKAN NAPOLEON (CHEILINUS UNDULATUS) DI PERAIRAN SINJAI DAN BONE-SULAWESI SELATAN Syam, Amran Ronny; Mujiyanto, Mujiyanto
JURNAL BIOLOGI INDONESIA Vol 10, No 1 (2014): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v10i1.327

Abstract

The exploitation of Napoleon fishery rates (Cheilinus undulatus) in the past year has been higher. Some areas inIndonesia are still doing the fishing business. Since the napoleon fish was registered in the IUCN red list &Appendix II of CITES, the export quota of 3,600 fishes per year was applied up to the year 2011. In order tosupport the evaluation size in the water bodies around Sinjai and Bone of the determination of napoleon fishprotection status, this study aims to determine fish population South Sulawesi. The method used was SnorkelingVisual Census (SVC). The results obtained indicate napoleon fish abundance is low (0 to 4 individuals/ha). Highestabundance of napoleon fish was found in Lapoipoi & Batanglampe, however none in three locations, i.e., Larearea,Pasiloange and Malambere. It is suggested that protection to species & its habitat is done in four locations wherethe napoleon fish were found, especially in Lapoipoi & Batanglampe.Keyword: napoleon fish, density, Sinjai, Bone, South Sulawesi
DEFORESTATION IN BUKIT BARISAN SELATAN NATIONAL PARK, SUMATRA, INDONESIA Suyadi, Suyadi
JURNAL BIOLOGI INDONESIA Vol 7, No 2 (2011): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v7i2.3080

Abstract

Deforestasi di Taman Nasional Bukit Barisan Selatan, Sumatra, Indonesia. Studi ini menerangkan deforestasi dan penyebabnya di Taman Nasional Bukit Barisan Selatan (TNBBS) yang merupakan habitat bagi berbagai satwa liar yang terancam punah. Penelitian ini menghubungkan metode penginderaan jauh dengan metode wawancara untuk memperkirakan laju deforestasi dan mengetahui penyebab deforestasi. Hasil wawancara menunjukan bahwa penggundulan hutan di TNBBS di mulai sejak tahun 1960an, lebih awal dari perkiraan sebelumnya.Hasil tersebut di perkuat oleh hasil analisa citra-satelit yang menunjukan bahwa sebelum 1972 tutupan hutan seluas 46.100 ha atau sekitar 13% dari luas hutan di TNBBS telah hilang. Ratarata laju deforestasi sejak 1972 hingga 2006 adalah 0,64% per tahun. Hanya sekitar 67.225 hahutan yang tersisa pada 2006 dari 310.670 ha hutan pada tahun 1972, atau sekitar 22% tutupan hutan telah hilang sejak 1972 hingga 2006. Laju deforestasi di TNBBS paling tinggi di hutan perbukitan (9.01 km2/tahun), kemudian hutan dataran rendah (7.55 km2/tahun), and hutanpegunungan (3.43 km2/tahun). Deforestasi tertinggi terjadi pada dekade pertama (1972-1985), setiap tahunnya seluas 28 km2 hutan di babat habis, kemudian pada dekade berikutnya (1986-1996) deforestasi hanya 15 km2/tahun, namun pada dekade terakhir deforestasi meningkat kembali(21 km2/tahun). Pelaku yang secara fisik membabat hutan di TNBBS adalah petani yang tinggal di dalam dan di sekitar hutan. Meskipun demikian, yang menjadi penyebab terpenting deforestasidi TNBBS adalah penyebab tidak langsung seperti illegal logging, Hak Pengusahaan Hutan, tingginya harga kopi, lemahnya penegakan hukum, dan situasi sosial-ekonomi di tingkat lokal dan nasional. Faktor-faktor tersebut merupakan faktor external yang mendorong petani untukmembuka hutan di TNBBS atau memperluas lahan garapannya.Kata kunci: Deforestasi, Penyebab deforestasi, Survei wawancara, Penginderaan jauh, Taman Nasional Bukit Barisan
ANALISA VEGETASI HUTAN PEGUNUNGAN DI TAMAN NASIONAL GUNUNG CIREMAI, MAJALENGKA, JAWA BARAT Purwaningsih, Purwaningsih; Yusuf, Razali
JURNAL BIOLOGI INDONESIA Vol 4, No 5 (2008): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v4i5.3221

Abstract

ABSTRACTThe Mountain Rain Forest Vegetation Analysis in Ciremai Mountain NationalPark, Majalengka, West Jawa. Vegetation study on some different altitude in CiremaiMountain National Park has been carried out with a quadrat methode. Ten plots were setup in altitude at 1600? 2050 m. The results of a floristic inventory of 1.2 hectare sampledplot show that there were 57 species of 42 genera in 28 families, represented by 1069individuals. The two leading families in terms of number of species were Euphorbiaceaeand Fagaceae while according to the most prominent species were Engelhardia spicata(Juglandaceae). There are differences of both zonation and altitudinal forest disturbance.The zone of 1600?1700 m asl. dominated by secondary species such as Saurauia nudiflora,Glochidion arborescens, Glochidion rubrum, Ficus fistulosa, Vernonia arborea andVillebrunea rubescens. In altitude of >1900 m asl. dominated by primary species such asMacropanax dispermum, Astronia spectabilis, Turpinia spaerocarpa, Elaeocarpus oxypyrenand Syzygium laxiflorum. The forest structure could be seen by diameter and heightstem classes distribution. Although the most of trees are small in size, but there havebeen still some largest trees were Engelhardia spicata, Turpinia sphaerocarpa and Astroniaspectabilis.Key words: West Java, Ciremai Mountain National Park, forest zonation, structure and speciescomposition
PHENETIC ANALYSIS OF GOSSYPIUM SPECIES (MALVACEAE) FROM INDONESIA Juswara, Lina Susanti
JURNAL BIOLOGI INDONESIA Vol 9, No 1 (2013): JURNAL BIOLOGI INDONESIA
Publisher : Perhimpunan Biologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jbi.v9i1.145

Abstract

This research was aimed to revise the species of Gossypium in Indonesia with statistical analysis of morphologicalcharacteristics. Three species of Gossypium were recognized based on phenetic analyses (cluster analysis-UPGMAand ordination-Principle Component Analysis) using 20 morphological characters and 18 samples of Gossypiumarboreum, G. barbadense, and G. hirsutum. Based on these analyses, two varieties were differentiated under G. arboreum(var. arboreum and var. acuminatum). The data set used for the analysis was robust in separating the samplesused in the analysis into discrete groups and cluster analysis-UPGMA and ordination-PCA were powerful tools forthe allocation of those samples into identifiable groups.Keywords: Phenetic analysis, Gossypium, Principal Component Analysis, UPGMA

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