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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 13 Documents
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Search results for , issue "Vol 7, No 3 (2017)" : 13 Documents clear
Cyanobacteria Community Dynamics and Trophic Status of Intensive Shrimp (Litopenaeus vannamei) Farming Pond in Situbondo East Java Indonesia Aliviyanti, Dian; Suharjono, Suharjono; Retnaningdyah, Catur
Journal of Tropical Life Science Vol 7, No 3 (2017)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.07.03.10

Abstract

The objective of this study was to analyze the dynamics community structure of Cyanobacteria and trophic status in ponds of intensive shrimp culture (Litopenaeus vannamei) in Situbondo based on Trophic Diatom Index (TDI).  The ex post facto research was conducted in situ in the hamlet of Pond Mutiara Mas III Klatakan Situbondo East Java Indonesia.  Observation of Cyanobacteria and Diatoms community structure were done every week during four cycles of shrimp farming ponds.  Cycle of shrimp farming ponds is the times for enlargement process of the shrimps from seed to mature which ranges from 90-120 days.  The dependent variables were the density of Cyanobacteria and Diatoms community, as well as chemical parameters nitrite and orthophosphate.  Trophic status was determined from TDI be counted from data of diatom density.  All of the data were then classified using cluster and biplot analysis program PAST Ver. 3.11 to discribe the profile of ecosystem quality.  The research results showed that there were four taxa of Cyanobacteria during farming cycle which the highest density was found from the genus of Oscillatoria.  Based on the value of TDI, we found that the trophic status of water in shrimps pond during the production process was eutrophic until hyper-eutrophic.  The water quality was decreases along with the length of incubation time.
Bioactivity of Citrus hystrix D.C. Leaf Extract Against Cigarette Beetle Lasioderma serricorne (F.) Ikawati, Silvi; Dhuha, Moh. Syamsu; Himawan, Toto
Journal of Tropical Life Science Vol 7, No 3 (2017)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.07.03.01

Abstract

The major control of pest stored Lasioderma serricorne for using synthetic pesticides, look like phosphine. Although quite effective, synthetic pesticides have a negative effect on the environment, such as pest re-sistance, deadly natural enemies, residues that are harmful to the environment and human health. The use of botanical pesticides as an alternative control be the focus this study. Botanical pesticides are selective to the target, safe for non-target insects and the environment. This research studies the repellent and fumigant activi-ty of the leaf extract of Citrus hystrix against all L. serricorne life stage. The results of GC-MS analysis of leaf crude extracts of C. hystrix with N-hexane solvent showed the highest percentage in the citronellal compound (86.43%). C. hystrix leaf extract showed stronger fumigant against pupae and eggs, compared adults, and larvae. The toxicity of the leaf extract of C. hystrix increased with increasing concentration. At a concentration of 60 ppm, fumigant activity showed the toxicity of 98.75% (pupae), 93.75% (eggs), 86.25% (adults) and 76.25% (larvae). Sequentially the LC50 value of fumigant activity from the highest to the lowest as follows; larvae 47.56 ppm, adults 43.42 ppm, eggs 31.61 and pupae 29.63 ppm. Extract of leaves of C. hystrix, have character repellent against L. serricorne. At a concentration of 60 ppm the IR value of 66% including repellent class IV, which means strong repellent level. Based on the results of the research, extracts of leaves of C. hystrix has a fumigant activity and repellent for controlling L. serricorne.
Identification of Fingerprints Pattern in Mixed Family of Chinese-Javanese Ethnic Nikmah, Istiftakhun; Fatchiyah, Fatchiyah
Journal of Tropical Life Science Vol 7, No 3 (2017)
Publisher : Journal of Tropical Life Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/jtls.07.03.12

Abstract

The aim of this study is to identify fingerprints patterns from the mixed family of Chinese-Javanese ethnic. The fingerprint patterns divided into three main patterns, i.e. arch, loop and whorl. The respondents were determined based on inclusion criteria (subject of research qualified as a sample) and the exclusion criteria (subjects which could not be used as a sample) through interviews and questionnaires. First, respondent’s fingers cleaned with alcohol or washed using soapy water. The patterns of fingerprint were taken by pressing one by one using an inked stamp pad. Then, printed on white paper which has been given a code and serial number of fingers for each respondent. The last step was to identify the specific characteristic of fingerprint patterns from the respondents and analyzed it while determining about similarity and variability of inter-generations. The results indicated that the mixed family of Chinese-Javanese ethnic had whorl variant pattern (plain whorl and double loop whorl) on the thumbs as a specific marker of Javanese ethnic. Otherwise, radial loop on the index and tented arch pattern on both index and little finger are the unique marker of Chinese ethnic. Thus, both Javanese and Chinese ethnic have co-dominant fingerprint patterns for mixed family of Chinese-Javanese ethnic.

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