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Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences
Published by Universitas Brawijaya
ISSN : 20875517     EISSN : 25274376     DOI : -
Core Subject : Agriculture, Social,
Agriculture, Biological Sciences & Forestry Environmental Science
The Journal of Tropical Life Science (JTLS) provides publication of full-length papers, short communication and review articles describing of new finding or theory in living system, cells and molecular level in tropical life science and related areas. The journal publishes articles that report novel findings of wide Tropical Life system phenomenon in the areas of biodiversity, agriculture, fisheries, health, husbandry, forestry and environmental technology. JTLS has 1 volume with 3 issues per year.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 2, No 1 (2012)" : 5 Documents clear
Vegetation Diversity Quality in Highland Forest of Ranu Regulo Lake Area, Bromo Tengger Semeru National Park, East Java Haryati, Jehan Ramdani; Hakim, luchman
Journal of Tropical Life Science Vol 2, No 1 (2012)
Publisher : Journal of Tropical Life Science

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Abstract

Aim of this research was to study vegetation diversity quality in highland forest of Ranu Regulo Lake area in Bromo Tengger Semeru National Park (TNBTS), East Java. Field observation was carried out by vegetation analysis using sampling plots of 25x25 m2 for trees, 5x5 m2 for poles, 1x1 m2 for ground surface plants. Community structure of each lake side was determined by calculating vegetation's density, basal area, frequency, important value and stratification of species. While vegetations diversity was estimated by taxa richness, Shannon-Wiener diversity index, and rate of endemism. Each lake side forests were compared by Morisita community similarity index. The result showed that based on existed vegetation, highland forest surrounding Ranu Regulo Lake consisted of four ecosystems, i.e. heterogenic highland forest, pine forest, acacia forest and bushes. Bushes Area has two types of population, edelweiss and Eupatorium odoratum invaded area. Vegetation diversity quality in heterogenic highland forest of Ranu Regulo TNBTS was the highest, indicated by its multi-stratification to B stratum trees of 20-30m high. Heterogenic highland forests formation was Acer laurinum and Acmena accuminatissima for trees, Chyatea for poles. Taxa richness was found 59 species and 30 families, while the others were found below 28 species and 17 families. Diversity Index of heterogenic highland forest is the highest among others for trees is 2.31 and 3.24 for poles and second in bushes (H=3.10) after edelweiss ecosystem (H=3.39). Highest rate of endemism reached 100% for trees in heterogenic highland forest, 87% for poles in edelweiss area and 89% for bushes also in heterogenic highland forest. Trees, poles and herbs most similarity community showed by pine and acacia forest. Based on those five characters, vegetation diversity quality in Ranu Regulo Lake area was medium for heterogenic highland forest and edelweiss area comparing to pine and acacia forest which had very low diversity quality. This low diversity was caused by invading species E. odoratum in density, distribution and dominance for threatening growth of poles and ground surface plants local species. Invaded ecosystem were pine forest, acacia forest and edelweiss area. It hasnt major invading in heterogenic highland forest, but it has reached the edge. Therefore, environmental policy must focus on this matter soon. Keywords: highland forest, community structure, quality diversity, Ranu Regulo
Hydro- Chemical Evolution of Palk Strait Region, Bay of Bengal govindasamy, chinavenkataraman; Arulpriya, Mani; Ruban, Packiasamy; Meenakshi, V. R.
Journal of Tropical Life Science Vol 2, No 1 (2012)
Publisher : Journal of Tropical Life Science

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Abstract

Present analysis was carried out the physico- chemical parameters of two stations such as Thondi and Soliyakudi in the southeast Palk Strait region during the monsoon and post monsoon seasons (November 2008 – March 2009). High temperature (31ËšC) and salinity (35%o) was recorded in the month of March (post monsoon). Dissolved oxygen content was high (5.2 O2 mg. l-1) during in the monsoonal season. Compared with other nutrients such as NO3, NO2 and SiO2, the total phosphorous concentration was high in both the stations during monsoonal season. In general concentrations of all the nutrients were high in the station I during monsoon season (November and December) which could be due to the addition of nutrients through the sewage, agricultural and land run off.
Utilization of Snail (Achatina fulica) Shell Waste for Synthesis of Calcium Tartrate Tetrahydrate (CaC4H4O6.4H2O) Single Crystals in Silica Gel Prananto, Yuniar P; Khunur, Mohammad M; Tjahjanto, Rachmat T; Sakdi, Imam; Basori, Muchammat C
Journal of Tropical Life Science Vol 2, No 1 (2012)
Publisher : Journal of Tropical Life Science

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Constructing Phenetic and Phylogenetic Relationship Using Clad'97 Rahardi, Brian; Arumningtyas, Estri Laras; Mahmudi, Wayan Firdaus
Journal of Tropical Life Science Vol 2, No 1 (2012)
Publisher : Journal of Tropical Life Science

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Abstract

Relationship construction has a very important position in classification process for arranging taxonomy of organism. In the world of taxonomy, there are two the most familiar relationship diagram, cladogram and phenogram. In every construction activity, a researcher is always facing character state data from taxa that becomes components of the diagram. Calculation that is used for construction is often incorporate iterative or repetitive process that needs time and precision. The existence of calculating tools that produces both text and graphical output are hopefully decrease time and error during construction. Basic algorithm that is used in calculation is for phylogenetic construction by Kluge and Farris in 1969,for phenetic construction using cluster analysis with slight modification. Basic common algorithm used in the software is by calculating two dimensional arrays of taxa x characters matrix and creating distance or similarity matrix. In more detail the program creates one dimensional array of taxonomical object and each object has some other one dimensional array containing data commonly exist in a taxonomic unit. The relationship between one object and theother are regulated by an object that created by class representing taxonomic tree. Cladogram is constructed by calculating nearest distance between each taxon (OTU) and creating one HTU in every bifurcation. Phenogram is constructed agglomeratively by searching highest similarity between taxon then grouped into new taxon. Program calculates numerical data after we do character scoring. Final result for each user may be different; this may be due to decision by user during construction process. This paper hopefully attracts people from systematic computation to develop further into open source software and multi-platform feature.
The operation and production of the barramundi, Lates calcarifer, at the Good Fortune Bay (GFB) Barramundi Farm Australia Aji, Ludi Parwadani
Journal of Tropical Life Science Vol 2, No 1 (2012)
Publisher : Journal of Tropical Life Science

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Abstract

Barramundi (Lates calcarifer) is a commercially important species in Australia and Southeast Asia. Barramundi are not difficult to accept artificial diets, resistant to disease and can grow faster in warm climates. System operation in Good Fortune Bay (GFB) Barramundi Farm in Kelso can be divided into nursery and grow-out management sections. The water source for nursery and grow-out is come from ground water with semi-recirculated system was applied. Every cage in the grow-out ponds has equipment with 4-wheel paddlewheel aeration. Aeration is eminent usually at night when the dissolve oxygen (DO) level in the ponds drop. To prevent predation and disease, each cage is covered by oyster tray lid and nursery tanks are always cleaned to remove pathogens. In the nursery, pellet is given to fish and the pellet size increase depends on the fish size, whereas, fish are feed by floating pellet for grow-out fish. Moreover, farmers measure water quality like DO every morning and also take water sample for ammonia, nitrite, nitrate analysis once a month. GFB Barramundi Farm just sells their product domestically and not import to other country since the price of barramundi from South East Asia such as Indonesia and Vietnam is much cheaper even the quality is lower than Australia product. This is because the labor and production cost in Australia is higher than South East Asia. Keyword: barramundi, nursery, grow-out, farm

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