scholarly journals Morphological and allozyme studies of small terrestrial snails (Opeas sp., Subulina sp., and Huttonella bicolor) collected from peninsular malaysia

2006 ◽  
Vol 42 (1) ◽  
pp. 40-48 ◽  
Author(s):  
M. S. Choh ◽  
C. K. Yap ◽  
S. G. Tan ◽  
H. A. Jambari
Keyword(s):  
Peninsular Malaysia ◽  
Terrestrial Snails

Floristic Variation of Tree Communities and Their Association with Soil Properties in Pulau Jerejak, Penang, Peninsular Malaysia

2020 ◽  
Vol 14 (1) ◽  
pp. 34
Author(s):  
Faezah Pardi
Keyword(s):  
Tree Species ◽  
Diversity Index ◽  
Basal Area ◽  
Peninsular Malaysia ◽  
Importance Value ◽  
Conservation Action ◽  
Endangered Tree ◽  
Endangered Tree Species ◽  
Tree Communities ◽  
Floristic Variation

This study was conducted at Pulau Jerejak, Penang to determine the floristic variation of its tree communities. A 0.5-hectare study plot was established and divided into 11 subplots. A total of 587 trees with diameter at breast height (DBH) of 5 cm and above were measured, identified and recorded. The tree communities comprised of 84 species, 63 genera and 32 families. The Myrtaceae was the most speciose family with 10 recorded species while Syzgium glaucum (Myrtaceae) was the most frequent species. The Myrtaceae recorded the highest density of 306 individuals while Syzgium glaucum (Myrtaceae) had the highest species density of 182 individuals. Total tree basal area (BA) was 21.47 m2/ha and family with the highest BA was Myrtaceae with 5.81 m2/ha while at species level, Syzgium glaucum (Myrtaceae) was the species with the highest total BA in the plot with value of 4.95 m2/ha. The Shannon˗Weiner Diversity Index of tree communities showed a value of 3.60 (H'max = 4.43) and Evenness Index of 0.81 which indicates high uniformity of tree species. The Margalef Richness Index (R') revealed that the tree species richness was 13.02. Myrtaceae had the highest Importance Value of 20.4%. The Canonical Correspondence Analysis (CCA) showed that Diospyros buxifolia (Ebenaceae) and Pouteria malaccensis (Sapotaceae) were strongly correlated to low pH. Dysoxylum cauliflorum (Meliaceae) and Eriobotrya bengalensis (Rosaceae) were correlated to phosphorus (P) and calcium ion (Ca2+), respectively. Therefore, the trees species composition at Pulau Jerejak showed that the biodiversity is high and conservation action should be implemented to protect endangered tree species. Keywords: Floristic variation; Tree communities; Trees composition; Pulau Jerejak; Species diversity

A COMPARATIVE STUDY BETWEEN UNIVARIATE AND BIVARIATE TIME SERIES MODELS FOR CRUDE PALM OIL INDUSTRY IN PENINSULAR MALAYSIA

2020 ◽  
Vol 5 (1) ◽  
pp. 374
Author(s):  
Pauline Jin Wee Mah ◽  
Nur Nadhirah Nanyan
Keyword(s):  
Time Series ◽  
Palm Oil ◽  
Moving Average ◽  
Forecast Accuracy ◽  
Peninsular Malaysia ◽  
Time Series Models ◽  
Crude Palm Oil ◽  
Univariate Time Series ◽  
Import And Export ◽  
Bivariate Time Series

The main purpose of this study is to compare the performances of univariate and bivariate models on four time series variables of the crude palm oil industry in Peninsular Malaysia. The monthly data for the four variables, which are the crude palm oil production, price, import and export, were obtained from Malaysian Palm Oil Board (MPOB) and Malaysian Palm Oil Council (MPOC). In the first part of this study, univariate time series models, namely, the autoregressive integrated moving average (ARIMA), fractionally integrated autoregressive moving average (ARFIMA) and autoregressive autoregressive (ARAR) algorithm were used for modelling and forecasting purposes. Subsequently, the dependence between any two of the four variables were checked using the residuals’ sample cross correlation functions before modelling the bivariate time series. In order to model the bivariate time series and make prediction, the transfer function models were used. The forecast accuracy criteria used to evaluate the performances of the models were the mean absolute error (MAE), root mean square error (RMSE) and mean absolute percentage error (MAPE). The results of the univariate time series showed that the best model for predicting the production was ARIMA  while the ARAR algorithm were the best forecast models for predicting both the import and export of crude palm oil. However, ARIMA  appeared to be the best forecast model for price based on the MAE and MAPE values while ARFIMA  emerged the best model based on the RMSE value.  When considering bivariate time series models, the production was dependent on import while the export was dependent on either price or import. The results showed that the bivariate models had better performance compared to the univariate models for production and export of crude palm oil based on the forecast accuracy criteria used.

"Exacum tenue (Gentianaceae), a new record from karst limestone in Peninsular Malaysia"

2018 ◽  
Vol 70 (1) ◽  
pp. 103-108
Author(s):  
A.R. Rafidah ◽  
◽  
A.R. Ummul-Nazrah ◽  
M.A. Mohd Hairul ◽  
◽  
...  
Keyword(s):  
New Record ◽  
Peninsular Malaysia

First record of the parasitic louse fly Ornithomya comosa (Diptera: Hippoboscidae) in Europe and western Russia

2019 ◽  
Vol 28 (2) ◽  
pp. 356-359
Author(s):  
E.P. Nartshuk ◽  
A.V. Matyukhin ◽  
A.P. Shapoval
Keyword(s):  
West Siberia ◽  
First Record ◽  
Peninsular Malaysia ◽  
Hirundo Rustica ◽  
Palaearctic Region ◽  
Curonian Spit ◽  
Oriental Region ◽  
Delichon Urbica ◽  
First Time

The parasitic louse fly Ornithomya comosa (Austen, 1930) (Diptera, Hippoboscidae), known from the Oriental Region (India, Thailand, Nepal and Peninsular Malaysia) and Asian part of the Palaearctic Region (Kazakhstan, Kyrgyzstan, West Siberia of Russia and Japan), is found for the first time in Europe and in the western part of Russia (Curonian Spit). Flies were collected from the swallow species Hirundo rustica (Linnaeus, 1758) and Delichon urbica (Linnaeus, 1758) (Hirundinidae). Two possible narratives for the occurrence of this fly in Europe are discussed.

Vertical profiles and storage fluxes of CO2, heat and water in a tropical rainforest at Pasoh, Peninsular Malaysia

Tellus B ◽  
2008 ◽  
Vol 60 (4) ◽  
Author(s):  
Shinjiro Ohkubo ◽  
Yoshiko Kosugi ◽  
Satoru Takanashi ◽  
Naoko Matsuo ◽  
Makoto Tani ◽  
...  
Keyword(s):  
Tropical Rainforest ◽  
Peninsular Malaysia ◽  
Vertical Profiles ◽  
And Storage

Lawad, Ye’ Yo’ and Tum Yap : The manifestation of forest in the lives of the Bateks in Taman Negara National Park

2016 ◽  
Vol 1 (1) ◽  
pp. 29 ◽  
Author(s):  
Nurul Fatanah Kamarul Zahari ◽  
Mustaffa Omar ◽  
Salleh Daim
Keyword(s):  
Physical Environment ◽  
National Park ◽  
Publishing House ◽  
Belief System ◽  
Peninsular Malaysia ◽  
Spiritual World ◽  
International Publishing ◽  
Dynamic Dimension ◽  
And Behavior ◽  
Open Access Article

This paper attempts to explore the manifestations of the forest in the lives of the Bateks who reside within the vast region of the Taman Negara National Park in Pahang, Peninsular Malaysia. Such manifestations emerged from the mutual relationship between the Bateks and their surroundings of the forest. In the Bateks belief system, there exist the concept of Lawad, Ye’ Yo’ and Tum Yap; all of which represent the Bateks’ unique way of giving value to the forest. Lawad, Ye’ Yo’ and Tum Yap are the manifestations of how the Bateks navigate themselves in the forest. The Bateks see that the forest represents a dynamic dimension which has to be calmed through good spirits and behavior because the physical environment is a medium for the spiritual world to express its feelings, thinking, decisions, and punishments. This belief is to them the best way in endearing themselves to the environment. To the Bateks, all concerns for the forest could be settled through this belief. © 2016 The Author. Published for AMER ABRA by e-International Publishing House, Ltd., UK.. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies), Faculty of Architecture, Planning & Surveying, UniversitiTeknologi MARA, Malaysia. Keywords: Environment-behaviour, indigenous people, Orang Asli, Orang Batek, taboos, Taman  Negara, National Park.

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