Indonesian Institute of Sciences

About: Indonesian Institute of Sciences is a facility organization based out in Jakarta, Indonesia. It is known for research contribution in the topics: Population & Genus. The organization has 4795 authors who have published 10544 publications receiving 76990 citations. The organization is also known as: Indonesian Institute of Sciences Cibinong, Indonesia.

Gene flow at the margin of Lake Matano’s adaptive sailfin silverside radiation: Telmatherinidae of River Petea in Sulawesi

Abstract: Classical speciation concepts focus almost exclusively on the evolution of strict reproductive isolation as a prerequisite for speciation. However, there is a growing body of evidence indicating that speciation is possible despite or even triggered by gene flow among populations or species. Previous findings indicate that introgressive hybridization is a dominant phenomenon in the adaptive radiation of sailfin silversides (Telmatherinidae) endemic to Lake Matano (Sulawesi). In this study, we investigate patterns of genotypic and phenotypic variation of “sharpfin” sailfin silversides in the outlet area of L. Matano and six locations along River Petea, which is the only connection between L. Matano and other lakes and streams of the Malili Lakes system. Fieldwork revealed no hints for a previously cited major waterfall in River Petea, which was thought to separate L. Matano’s sailfin silverside radiation from the diversity of the downstream lake drainages. Likewise, genomic (AFLP) and morphometric data suggest high levels of gene flow between upper and lower stretches of this river, as well as between riverine Petea and lacustrine Matano populations. Increasing levels of genotypic and phenotypic dissimilarity are correlated with distance over a remarkably short geographic range.

Phenotypic, morphometric characterization and population structure of Pasundan cattle at West Java, Indonesia

Abstract: Said S, Putra WPB, Anwar S, Agung PP, Yuhani H. 2017. Phenotypic, morphometric characterization and population structure of Pasundan cattle at West Java, Indonesia. Biodiversitas 18: 1638-1645. Identification of phenotypic and morphometric characteristics in indigenous cattle is important in characterizing breeds of animals. This study was carried out to identify the phenotypic and morphometric characteristics of 813 indigenous Pasundan cattle from West Java Province of Indonesia. The coat color of Pasundan cattle is mainly solid reddish brown (>90%) with black color on hoof (>90%), switch of tail (>80%), eyelid (>90%), muzzle (>90%), horn (>90%) and whitish color on mouth lash (>80%) and reddish brown color on legs (>60%) and rump patch (>60%). The physical characteristic of Pasundan cattle mainly is the hump in males (65.23%) or humpless in female (74.91%), small dewlap size (>60%), presence of back line (>60%) and horned (>80%) with upper curved horn (>90%). The average of withers height (WH), body length (BL), chest girth (CG) and scrotal circumference (SC) of adult male Pasundan cattle were 128.94+16.69 cm; 128.72+15.98 cm; 159.36+15.84 cm and 17.68+3.51cm respectively. Therefore, the average of WH, BL, and CG of adult female Pasundan cattle was 122.56+11.40 cm; 115.63+19.06 cm and 140.13+12.16 cm respectively. Natural Increase (NI) and calf crop values were 18.46% (low category) and 20.40% respectively. Net Replacement Rate (NRR) values were 300% (male) and 507% (female) and indicated that West Java province was still capable to produce seed stock per year.

Factors influencing the behavioral intention of public transport passengers

Abstract: – The purpose of this paper is to investigate the factors that influence the behavioral intention (BI) of paratransit passengers in three major cities in Indonesia, namely Bandung, Medan, and Surabaya. More specifically, this paper will examine the relationship between the BI and other factors, including satisfaction (SAT), perceived sacrifice (SAC), perceived value (PV), service quality (SQ), and frequency of usage. , – The empirical data were collected through a survey with 264 respondents. Structural equation modeling was employed to test the proposed hypotheses. , – SQ affects word-of-mouth (WOM) of paratransit passengers directly and indirectly through PV. However, SQ has no statistically significant direct effects on repurchase intention. SAC is proved to affect WOM and repurchase intention of paratransit passengers indirectly via PV. In addition, it is also found that SAT and frequency of usage have no statistically significant effect on WOM and repurchase intention of paratransit passengers. , – The data collection using convenience sampling method as well as the use of small sample size caused the limitation of the research results in representing across all paratransit passengers in the three cities where the research was conducted in. This study can be replicated with larger sample size in order to examine the stability of the results in other contexts. , – The research results shows that sacrifice, SQ, and PV affect the BI of paratransit passengers. Thus, the management of paratransit service provider should consider and manage all of these factors proactively. , – The paper has established a BI model of public transport passengers that can help organizations to manage the formation of BI of their passengers. The model has some novelties, which are first, the model includes frequency of usage, second, it uses BI as a multidimensional construct, consisting of repurchase intention and WOM, rather than a single dimensional construct, and third, it also includes the direct relationship between SAC and BI (repurchase intention and WOM).

Correlation of Ligninolytic Enzymes from the Newly-Found Species Trametes versicolor U97 with RBBR Decolorization and DDT Degradation

Abstract: Thirty strains of fungi collected from nature were investigated for their ability to grow on agar medium contaminated with Remazol Brilliant Blue R (RBBR) and 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (DDT). The results showed that strain U97, later identified as Trametes versicolor, was the most active decomposer. This fungus decolorized 85 % of RBBR in 6 h and degraded 71 % of DDT in 30 days. In RBBR decolorization, high-performance liquid chromatography analysis revealed that two peaks were identified as metabolic products. Among inducers for ligninolytic enzymes, only veratryl alcohol improved RBBR decolorization and DDT degradation by 93 % and 77 %, respectively. A partial least squares method using Minitab 15 showed that lignin peroxidase exhibited a positive correlation to the abilities of T. versicolor U97 to decolorize RBBR and degrade DDT. A multivariate linear equation, with the same values of ligninolytic activity during RBBR decolorization and DDT degradation, revealed that 1 % RBBR decolorization represented 1.16 % DDT degradation. Screening with agar or liquid medium and improvement of the mathematical modeling could have practical importance in the exploitation of T. versicolor U97 for the removal of DDT on a commercial scale.