Garuda - Garba Rujukan Digital

All

BIOTROPIA - The Southeast Asian Journal of Tropical Biology

biotropia
Website

Published by Southeast Asian Regional Centre for Tropical Biology

ISSN : 02156334 EISSN : 1907770X DOI : http://dx.doi.org/10.11598/btb

Core Subject : Health, Science, Agriculture,

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology Veterinary

BIOTROPIA, The Southeast Asian Journal of Tropical Biology, is a scientific publication of the Southeast Asian Ministers of Education Organization (SEAMEO) – Southeast Asian Regional Center for Tropical Biology (BIOTROP). It publishes articles in the broad areas of tropical ecosystems and environmental impacts, biodiversity conservation and sustainable development and biotechnology.

Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)

Articles 520 Documents

13 14 15 16 17

Tiger Beetles (Coleoptera: Carabidae: Cicindelinae) of Compostela Valley Province, Mindanao Island, Philippines Medina, Milton Norman Dejadena; Cabras, Analyn Anzano; Wiesner, Jurgen
BIOTROPIA Vol. 23 No. 2 (2016): BIOTROPIA Vol. 23 No. 2 December 2016
Publisher : SEAMEO BIOTROP

The first faunistic record of tiger beetles (Coleoptera: Carabidae: Cicindelinae) in Compostela Valley Province, Mindanao with notes on their habitat is presented. Opportunistic sampling, standard light trapping and photo documentation were conducted in selected areas from January to April 2013 and in September 2015. One hundred four tiger beetles belonging to twelve species and seven genera were recorded. An astonishing (100%) endemicity was observed identified to subspecies level. Thopeutica and Calomera species, specifically Thopeutica anichtchenkoi Wiesner, 2015 and Calomera mindaoensis Cassola, 2000 were observed to be abundant in the samples mostly found in the mountainous and forested open riparian ecosystem of Cagan, New Bataan. Cylindera (Ifasina) discreta elaphroides (Dokhtouroff 1882) was the most common species and was found in different habitat types, but the majority of the species showed a narrow and specialized habitat preference. Protection and conservation of remaining forest areas in Cagan is especially important in preserving endemic species.

SACCHARIFICATION OF CORNCOB USING CELLULOLYTIC BACTERIA FOR BIOETHANOL PRODUCTION SUNARTI, TITI CANDRA; MERYANDINI, ANJA; SOFIYANTO, M. EDY; RICHANA, NUR
BIOTROPIA Vol. 17 No. 2 (2010): BIOTROPIA Vol. 17 No. 2 December 2010
Publisher : SEAMEO BIOTROP

The use of cellulose degrading enzyme (cellulases) for hydrolysis of lignocellulosic material is a part of bioethanol production process.Â In this experiment, Â delignified corncob,Â its cellulose fraction and alpha cellulose were used as substrates to produce fermentable sugar by using three local isolates of celluloytic bacteria (C5-1, C4-4, C11-1 and Cmix ; mixed cultures of three isolates), and Saccharomyces cereviseae to produce ethanol. The results showed that all isolates of cellulolytic bacteria can grow on cellulose fraction better than on Â delignified corncob, and alpha cellulose.Â The highest hydrolytic activity produced from cellulose fraction was by isolate C4-4, which liberated 3.50 g/l of total sugar.Â Ethanol can be produced by mixed culture of bacteria and yeast, but because of competitive growth, the fermentation only produced 0.39-0.47 g/l of ethanol. Keywords:Â Celluloses, delignified corncob

ANTAGONISTIC BACTERIA AGAINST SCHIZOPHYLLUM COMMUNE FR. IN PENINSULAR MALAYSIA DIKIN, ANTARJO; SIJAM, KAMARUZAMAN; KADIR, JUGAH; SEMAN, IDRIS ABU
BIOTROPIA Vol. 13 No. 2 (2006): BIOTROPIA Vol. 13 No. 2 December 2006
Publisher : SEAMEO BIOTROP

Schizophyllum commune Fr., is one of the important fungi, causes brown germ and seed rot of oil palm. Biodiversity of antagonistic bacteria from oil palm plantations in Peninsular Malaysia is expected to support in development of biopesticide. Isolation with liquid assay and screening antagonistic bacteria using dual culture assay were carried out in the bioexploration. A total of 265 bacterial isolates from plant parts of oil palm screened 52 antagonistic bacterial isolates against 5. commune. Bacterial isolates were identified by using Biolog* Identification System i.e. Bacillus macroccanus, B. thermoglucosidasius, Burkholderia cepacia, B. gladioli, B. multivorans, B pyrrocinia, B. spinosa, Corynebacterium agropyri, C. misitidis, Enterobacter aerogenes, Microbacterium testaceum, Pseudomonas aeruginosa, P. citronellolis, Rhodococcus rhodochrous, Serratia ficaria, Serratia sp., S. marcescens, Staphylococcus sciuri, Sternotrophomonas maltophilia.Key words : Schizophyllum commune, biodiversity, antagonistic bacteria

Soil Characteristics Under Intensified Shifting Cultivation for Upland Rice Cultivation in Upland Sabal, Sarawak, Malaysia Ying, Ho Soo; Wasli, Mohd Effendi bin; Perumal, Mugunthan
BIOTROPIA Vol. 25 No. 1 (2018): BIOTROPIA Vol. 25 No. 1 April 2018
Publisher : SEAMEO BIOTROP

Shifting cultivation practices are regarded as the most important agricultural land-use in the marginal uplands of Sarawak for the livelihood of the rural communities. In response to various socio-economic consequences, previous practices on traditional form of shifting cultivation were altered into much sedentary farming practices. Soil productivity to sustain rice yield under current intensified forms of shifting cultivation should be of prime importance for food security among the local community at the marginal uplands of Sarawak. Therefore, this study was conducted to characterize soil properties influenced by the current intensified shifting cultivation practices at Sabal upland area, Sarawak. Along with the use of agrochemicals, shifting cultivation at Sabal area was conducted through single cultivation practices (10 to 15 years of fallow period and a cycle of rice cultivation) and multiple cultivation practices (5 to 7 years of fallow period and two cycles of rice cultivation). Before burning practices, soil pH was highly acidic (ranged from 4.28 to 4.72) in single cultivation sites; while multiple cultivation sites showed less acidic nature (soil pH ranged from 4.98 to 5.23) with relatively high secondary macronutrient contents, especially soil exchangeable Mg and Ca. No significant observation was found after burning practice in Total C and Total N of the soils at both sites. The level of soil exchangeable bases (K, Mg and Ca) and available P increased after the burning practices in single cultivation farmlands; while multiple cultivation sites showed lower to no increase in exchangeable bases and available P, partly attributed to the limited supply of nutrients from the aboveground biomass. After the harvesting of rice, soils at both sites tended to be more acidic and lower in macronutrient contents (K, Mg and Ca), primarily ascribable to crop uptake during the cultivation period. The average yield of rice in single cultivation sites and multiple cultivation sites were 721 kg/ha and 391 kg/ha, respectively. Our findings suggested that the usage of agrochemicals, particularly fertilizers in multiple cultivation sites are necessary for sustaining rice yield to restore the depleted macronutrients (especially K, Mg and Ca) after successive cultivation.

NOTES ON SOME GROWTH CHARACTERISTICS OF MIKANIA CORD AT A (BURM. F.) B.L. ROBINSON* MERCADO, B.T.
BIOTROPIA No. 7 (1994)
Publisher : SEAMEO BIOTROP

Mikania follows a sympodial dichotomy pattern of branching. Both stem (branches) and leaves give rise to new plants with relative ease. Internodes also root easily but do not give rise to new plants. Flower formation and seed germination are strongly influenced by light. Numerous seeds are produced but only few are filled; still fewer are the seeds that germinate. The period from early emergence to about the 3-leafed stage is most critical for survival of the new plant. Keywords: Mikania cordata, Growth, Weed physiology

Mitochondrial DNA variation of the Sumatran elephant in Sumatera Sulandari, Sri
BIOTROPIA Vol. 19 No. 2 (2012): BIOTROPIA Vol. 19 No. 2 December 2012
Publisher : SEAMEO BIOTROP

A research on Mitochondrial DNA analysis of genetic diversity in Sumatran elephant (Elephas maximus sumatranus) was conducted in this study.Â A 630 bp segment of mitochondrial DNA was amplified on 105 samples of Sumatran elephant from 5 locations in Sumatera (Bentayan, Sugihan, Bukit Salero Lahat, Seblat, Way Kambas) using a set of primers: MDL3 (5â€™-CCCACAAT-TAATGGGCCC-GGAGCG-3â€™) and MDL5 (5â€™-TTACATGAATTGGCAGCCA-ACCAG-3â€™). The objectives of this study is to generate mitochondrial DNA D-loop sequences for all the Sumatran elephant samples under this study andÂ to provide information haplotypes and nucleotide diversity ofÂ Sumatran elephant populations. Â Â Â Â Â Â Â Â Â Â Â A total of 105 PCR product were successfully sequenced perfectly, with an average length of about 616 base pairs. However, mitochondrial DNA fragmentsÂ for this analysis used the first 601 bases. Results showed six haplotypes (BP, BT, BS, BR, BX and BY) identified in Sumatera.Â The most of the sampled individuals are the haplotipe BT. BX and BY are most likely new haplotypes.. Â All haplotype, except for the haplotipe BPÂ are belonging to the Sumatera clade. The haplotipeÂ BX was derived from the haplotipe BT, and the haplotypeÂ BY wasÂ derived from the haplotipe BS by one transversion respectively. The other substitutions in this network were the transitions. The haplotype BP is widely distribute from Sri Lanka, Sumatera, Peninsular MalayÂ and China). Although reported that the haplotype BU distributed Sumatera and Peninsular Malay, but BU haplotype not detected in this study. Â Â Â Â Â Â Â Â Â Â Â Genetic distances within populations in Bentayan, Bukit Salero Lahat, Seblat, Sugihan and Way Kambas ranged from 0.0000 - 0003, and the genetic distance between the populations that is 0.0000 - 0. 0022. The distance between haplotypes of Sumatran elephantâ€™s population is low.â€¢ The diversity of haplotypes and nucleotide in Sumatera island is low, the highest isÂ in the region of Buki SaleroÂ Lahat and, lowest is in Bentayan and Sugihan. Overall, the results of analysis of Fu and Li's F * test statistic indicates that the population of Sumatran elephants in Sumatra is -0.78871, which means there is no inbreeding, but not significant at P> 0:10. Â Keywords : Sumatran elephant, Elephas maximusÂ sumatranus, mitochondrial DNA, haplotype

Review: Solutions for Grand Challenges in Goat and Sheep Production Industry Aldridge, Mildred Elizabeth; Fearon, Jasmyn Elaine; Haynes, Bethany Peyton; Miller, Hannah Marie; Sanford, Katie Yvonne; Scott, Rachel Rebecca; Anglin, William Wess; Blalock, Lauren Susanne; Burkes, Briana Lashun; Cohn-White, Olivia Lucienne; Franks, Brittany Renee; Giles, Haleigh Margaret; Greene, Ashley Lorraine; Hanby, Riley Dawn; Holliman, Anna Grace; Kirby, John Mark; Klein, Austin William; Lehmann, Courtney Ann; Llyod, Grace Jennette; Lore, Cody Triston; McMurray, Tyler B.; Moody, Zachary Vinz; Palmer, Brianna Nicole; Pansano, Lindsey Virginia; Pickle, Ryan Matthew; Schaeffer, Laura Marie; Seidl, Jeneva Ruth; Smith, James Dean; Stepp, Hannah Faith; Satrio, Faisal Amri; Kutchy, Naseer Ahmad; Dechert, Ed; Rutherford, Cobie; Brown, Kipp; Purwantara, Bambang; Memili, Erdogan
BIOTROPIA Vol. 26 No. 1 (2019): BIOTROPIA Vol. 26 No. 1 April 2019
Publisher : SEAMEO BIOTROP

Goats and sheep are valuable as they are a source of meat, milk, fleece, and other products. These livestock are also important both for agriculture and biomedical research. However, the efficient, sustainable, and profitable production of these small ruminants faces major obstacles. Hence, this review analyzes these major challenges specifically, their negative impacts on the industry, and suggests some science-based solutions to overcome them. Those challenged areas are education and training, research, translational research/biotechnology, goat and sheep health, and maintenance of an economically sustainable agribusiness. The suggested solutions include the effective teaching of goat and sheep science to the next generation and public empowerment, support for innovative and translational research, disease prevention and treatment, support for technology transfer, and development of sound agribusiness practices. This review is helpful particularly for scientists, students, and the goat and sheep producers. In general, these information on the current state of goat and sheep agriculture will also help the public to better understand and appreciate the challenges met and opportunities provided in small ruminant production enterprises.

SCREENING FOR NATURAL PRODUCTS OF SHOREA Spp. AND ANISOPTERA Spp. OF THE FAMILY DIPTEROCARPACEAE FROM PASIR MAYANG, JAMBI, SUMATERA AFFANDi, HILMAN; NURYADIN, ARIF; PRAYOGA, SUSILO B.
BIOTROPIA No. 12 (1999)
Publisher : SEAMEO BIOTROP

Screening of 12 species ofÂ ShoreaÂ and 2 species ofÂ AnisopteraÂ from the forest of Pasir Mayang, Jambi with brine shrimp (Anemia salina) lethality bioassay showed that Shorea gibosa and Anisoptera marginataÂ have sufficient activity for further investigation. Bioassay-guided fractionation of the active extract ofÂ S. gibosaÂ led to the isolation of stigmasterol and the shoreaphenol. Bioassay-guided fractionation of the active extract of A. marginata resulted in the isolation of lupenone and 3-methoxy-4-hydroxybenzoic acid O-p-C glucopyranoside as the bioactive compound. Key words: Plant natural products/Sftorea gibosalAnisoptera marginatalActive extracts/Bioassay/Pasir Mayang.

Effects of Fire on Structure and Composition of Vegetation Community in Pine Forests, Nam Nao National Park, Thailand Wanthongchai, Kobsak; Tarusadamrongdet, Voradet
BIOTROPIA Vol. 27 No. 2 (2020): BIOTROPIA Vol. 27 No. 2 August 2020
Publisher : SEAMEO BIOTROP

Anthropogenic forest fires, including those occurring in the pine forests of Thailand, have been widely reported. Although pine forests are fire-dependent, too frequent burning could be unhealthy for the forest as it might result in nutrient depletion and ecosystem degradation. Hence, this study aimed to examine the effects of forest fire on the vegetation structure and composition of a degraded pine forest (PF) and a mixed pine-oak forest (O-PF) in Phu Kum Khao, Nam Nao National Park, Phetchabun Province, Thailand. The effects of fire over one year were studied using three 50 × 50 m experimental plots established in each forest type. Results showed that fire events caused a significantly higher tree mortality rate in the degraded pine forest than in the mixed pine-oak forest. Moreover, the seedling ratio (number of sprouts to number of seedlings) in the mixed pine-oak forest was higher than in the degraded pine forest. Although the sapling and seedling diameters were slightly different between the sites, no significant effect of burning was observed on sapling and seedling density, diameter, or height. This might be due to the high variation of fire behavior in each plot. Since forest fires are a potential factor contributing to forest degradation in the study area, further studies on the effects of fire frequency on vegetation structure and composition are needed to provide sufficient control measures for efficient forest fire management and prevent further ecosystem degradation.

CHARACTERIZATION OF STREPTOMYCES sp. 45I-3 XYLANASE Meryandini, Anja; Saprudin, Deden; Prihandono, Prima Agung; Akhdiya, Alina; Hendarwin, Trio
BIOTROPIA Vol. 14 No. 2 (2007): BIOTROPIA Vol. 14 No. 2 December 2007
Publisher : SEAMEO BIOTROP

Streptomyces sp 45I-3 producing xylanase was isolated from Kalimantan soil sample. Crude enzyme (produced by centrifuging the culture at 14000 rpm for about 5 minutes) and purified xylanase has an optimum condition at pH 5 and 50 oC.Â Crude xylanase have half-life time of 2 hours 9 minute at 50 oC, whereas purified xylanase has half-life time of 12 hours. The molecular mass of purified xylanase was determined to be 43.2 and 39.2 kDa.

Page 15 of 52 | Total Record : 520

13 14 15 16 17

Filter by Year

1987 2025

Filter By Issues

All Issue Vol. 32 No. 2 (2025): BIOTROPIA Vol. 32 No. 2 August 2025 Vol. 32 No. 1 (2025): BIOTROPIA Vol. 32 No. 1 April 2025 Vol. 31 No. 3 (2024): BIOTROPIA Vol. 31 No. 3 December 2024 Vol. 31 No. 2 (2024): BIOTROPIA Vol. 31 No. 2 August 2024 Vol. 31 No. 1 (2024): BIOTROPIA Vol. 31 No. 1 April 2024 Vol. 30 No. 3 (2023): BIOTROPIA Vol. 30 No. 3 December 2023 Vol. 30 No. 2 (2023): BIOTROPIA Vol. 30 No. 2 August 2023 Vol. 30 No. 1 (2023): BIOTROPIA Vol. 30 No. 1 April 2023 Vol. 29 No. 3 (2022): BIOTROPIA Vol. 29 No. 3 Desember 2022 Vol. 29 No. 2 (2022): BIOTROPIA Vol. 29 No. 2 Agustus 2022 Vol. 29 No. 1 (2022): BIOTROPIA Vol. 29 No. 1 April 2022 Vol. 28 No. 3 (2021): BIOTROPIA Vol. 28 No. 3 December 2021 Vol. 28 No. 2 (2021): BIOTROPIA Vol.28 No.2, Agustus 2021 Vol. 28 No. 1 (2021): BIOTROPIA Vol. 28 No. 1 April 2021 Vol. 27 No. 3 (2020): BIOTROPIA Vol. 27 No. 3 December 2020 Vol. 27 No. 2 (2020): BIOTROPIA Vol. 27 No. 2 August 2020 Vol. 27 No. 1 (2020): BIOTROPIA Vol. 27 No. 1 April 2020 Vol. 26 No. 3 (2019): BIOTROPIA Vol. 26 No. 3 December 2019 Vol. 26 No. 2 (2019): BIOTROPIA Vol. 26 No. 2 August 2019 Vol. 26 No. 1 (2019): BIOTROPIA Vol. 26 No. 1 April 2019 Vol. 25 No. 3 (2018): BIOTROPIA Vol. 25 No. 3 December 2018 Vol. 25 No. 2 (2018): BIOTROPIA Vol. 25 No. 2 August 2018 Vol. 25 No. 1 (2018): BIOTROPIA Vol. 25 No. 1 April 2018 Vol. 24 No. 3 (2017): BIOTROPIA Vol. 24 No. 3 December 2017 Vol. 24 No. 2 (2017): BIOTROPIA Vol. 24 No. 2 August 2017 Vol. 24 No. 1 (2017): BIOTROPIA Vol. 24 No. 1 April 2017 Vol. 23 No. 2 (2016): BIOTROPIA Vol. 23 No. 2 December 2016 Vol. 23 No. 1 (2016): BIOTROPIA Vol. 23 No. 1 June 2016 Vol. 22 No. 2 (2015): BIOTROPIA Vol. 22 No. 2 December 2015 Vol. 22 No. 1 (2015): BIOTROPIA Vol. 22 No. 1 June 2015 Vol. 21 No. 2 (2014): BIOTROPIA Vol. 21 No. 2 December 2014 Vol. 21 No. 1 (2014): BIOTROPIA Vol. 21 No. 1 June 2014 Vol. 20 No. 2 (2013): BIOTROPIA Vol. 20 No. 2 December 2013 Vol. 20 No. 1 (2013): BIOTROPIA Vol. 20 No. 1 June 2013 Vol. 19 No. 2 (2012): BIOTROPIA Vol. 19 No. 2 December 2012 Vol. 19 No. 1 (2012): BIOTROPIA Vol. 19 No. 1 June 2012 Vol. 18 No. 2 (2011): BIOTROPIA Vol. 18 No. 2 December 2011 Vol. 18 No. 1 (2011): BIOTROPIA Vol. 18 No. 1 June 2011 Vol. 17 No. 2 (2010): BIOTROPIA Vol. 17 No. 2 December 2010 Vol. 17 No. 1 (2010): BIOTROPIA Vol. 17 No. 1 June 2010 Vol. 16 No. 2 (2009): BIOTROPIA Vol. 16 No. 2 December 2009 Vol. 16 No. 1 (2009): BIOTROPIA Vol. 16 No. 1 June 2009 Vol. 15 No. 2 (2008): BIOTROPIA Vol. 15 No. 2 December 2008 Vol. 15 No. 1 (2008): BIOTROPIA Vol. 15 No. 1 June 2008 Vol. 14 No. 2 (2007): BIOTROPIA Vol. 14 No. 2 December 2007 Vol. 14 No. 1 (2007): BIOTROPIA Vol. 14 No. 1 June 2007 Vol. 13 No. 2 (2006): BIOTROPIA Vol. 13 No. 2 December 2006 Vol. 13 No. 1 (2006): BIOTROPIA Vol. 13 No. 1 June 2006 No. 25 (2005) No. 24 (2005) No. 23 (2004) No. 22 (2004) No. 21 (2003) No. 20 (2003) No. 19 (2002) No. 18 (2002) No. 17 (2001) No. 16 (2001) No. 15 (2000) No. 14 (1999) No. 13 (1999) No. 12 (1999) No. 11 (1998) No. 10 (1997) No. 9 (1996) No. 8 (1995) No. 7 (1994) No. 6 (1992) No. 5 (1992) No. 4 (1991) No. 3 (1989) No. 2 (1989) Vol. 1 No. 1 (1987) More Issue

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
Knowledge Management Department

Contact Email
kmd@biotrop.org

Phone
+62251-8323848

Journal Mail Official
biotropia@biotrop.org

Editorial Address
SEAMEO BIOTROP Jl. Raya Tajur Km. 6 Bogor 16134 INDONESIA

Location
Kota bogor,

Jawa barat

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Knowledge Management Department

Contact Email kmd@biotrop.org

Phone +62251-8323848

Journal Mail Official biotropia@biotrop.org

Editorial Address SEAMEO BIOTROP Jl. Raya Tajur Km. 6 Bogor 16134 INDONESIA

Location Kota bogor, Jawa barat INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Knowledge Management Department

Contact Email
kmd@biotrop.org

Phone
+62251-8323848

Journal Mail Official
biotropia@biotrop.org

Editorial Address
SEAMEO BIOTROP Jl. Raya Tajur Km. 6 Bogor 16134 INDONESIA

Location
Kota bogor,

Jawa barat

INDONESIA