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BIOTROPIA - The Southeast Asian Journal of Tropical Biology
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 3 Documents
 1 
Search results for , issue "No. 18 (2002)" : 3 Documents clear
MORPHOLOGICAL CHARACTERIZATION OF MALAYSIAN WILD BANANA MUSA ACUMINATA MUHAMMAD ASIF JAVED; MAK CHAI; ROFINA YASMIN OTHMAN
BIOTROPIA - The Southeast Asian Journal of Tropical Biology No. 18 (2002)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (253.366 KB) | DOI: 10.11598/btb.2002.0.18.170

Abstract

Fourteen populations of Musa acuminata  ranging from populations in  the lowlands of northern (ssp. siamea)  to central Malaysian region  (ssp. malaccensis) and highland banana  (ssp. truncata) were characterized based on chromosome number and 46 morphological characters. A large amount of variation was observed within the populations. However, only highland bananas appeared morphologically distinct. Lowland populations both from northern and central Malaysia were found to be overlapping and no distinguishing pattern was observed. The morphological characters found variable within these populations were related to developmental changes and mutations. The results obtained in this study were not revolutionary. However, the survey of a large number of characters treated with multivariate techniques further sharpened the existing groupings of the Musa acuminata subspecies. Key words: Musaceae/ Malaysia / ssp. malaccensis I ssp. truncata I ssp. siamea
ADHERENCE AND PATHOGENICITY ASSAY OF VIBRIO HARVEYI IN TIGER SHRIMP (PENAEUS MONODON) LARVAE FOR SCREENING BIOCONTROL AGENT ANTONIUS SUWANTO; YUSMINAH HALA; RIDWAN AFFANDI; MUHAMMAD ZAIRIN Jr.
BIOTROPIA - The Southeast Asian Journal of Tropical Biology No. 18 (2002)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2002.0.18.171

Abstract

Rifampicin-resistant marker was employed as a reporter to detect the adherence and colonization of V. harveyi  in shrimp larvae. Vibrio harveyi P1B  and YA32.2 were isolated from dead shrimp larvae in Besuki, Northern Coast of East Java, while V. harveyi HB3, was isolated from pristine sea water in Pacitan, Southern Coast of East Java. Vibrio metschnikovii used as biocontrol agent was isolated from healthy shrimp larvae in Serang, West Java. Spontaneous mutation was conducted to generate V. harveyi P1B, YA32.2 and HB3 resistant to rifampicin. These mutants exhibited similar survival ability to their parental (wild type) strains. Significant larval mortality was observed in shrimp larvae inoculated with YA32.2 than that of larvae inoculated with P1B. Larvae  inoculated with HB3 showed the lowest mortality. Bacterial cell count of Vibrio Rf*  in dead  larvae were 103-104 cells/larvae. Isolates of Vibrio metschnikovii Z and M as biocontrol candidates effectively reduced the growth and adherence ability of YA32.2 to shrimp larvae. Larval mortality in rearing water inoculated simultaneously with YA32.2 and V. metschnikovii was lower than the one inoculated with YA32.2 alone. Therefore, Vibrio metschnikovii Z or M could be developed as an effective probiotic or biocontrol agent for V. harveyi in shrimp hatcheries. Key words :   Biological control/Vibrio metschnikovii/shrimp \arvae/Penaeus mwu«fon/pathogenicity assay/Vibrio harveyi
PRELIMINARY STUDY ON THE PALM FLORA OF THE LORE LINDU NATIONAL PARK, CENTRAL SULAWESI, INDONESIA JOHANIS P MOGEA
BIOTROPIA - The Southeast Asian Journal of Tropical Biology No. 18 (2002)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2002.0.18.169

Abstract

The population size, structure, and composition of the palm flora in a 1350 m by 20 m rectangular plot in Gunung Potong and a 1500 m by 20 m rectangular plot in Tongoa were measured. The total palm species from both plots numbered 33 represented by 8 genera. Eight species, namely  Calamus omatus  var. celebicus, Pinanga caesia, Arenga pinnata, Daemonorops  sp.3.  Calamus didymocarpus. Calamus  sp.4 (rapid spines), Caryota mitis, andAreca vestiaria have relatively high frequency values ranging from 5.46% to 10.66%. In addition, palm specimens previously collected from the park were examined at Herbarium Bogoriense to set up a preliminary checklist. So far, the national park is recorded as having 48 palm species represented by 11 genera which give figures of about 68% species and 58% genera of the total native Sulawesi palm flora. Though the number of endemic palms in Sulawesi is high (72%), namely 51 out of total native 71 species, only two species are locally endemic to Central Sulawesi namely  Gronophyllum sarasinorum and Pinanga sp. nov. 1 (longirachilla). So far only the latter species is endemic to the national park. Key words: palm diversity/Lore Lindu National Park/Sulawesi/Indonesia/endemic species

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