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Articles by A.B. Idris
Total Records ( 4 ) for A.B. Idris
  A.L. Yusuf , M. Ebrahimi , Y.M. Goh , A.A. Samsudin , A.B. Idris , A.R. Alimon and A.Q. Sazili
  The study was carried out to determine the effect of diets containing different parts of Andrographis paniculata on cumulative gas production, dry matter digestibility, methane and volatile fatty acids production in goats using in vitro gas production technique. The leaves, stems and roots of Andrographis paniculata (AP) were analysed for total polyphenols. Leaves of AP were found to contain the highest concentration of polyphenols; 3.08% Tannic Polyphenol (TP), 0.46% Hydrolysable Tannin (HT) and 0.19% Condensed Tannin (CT). The Non-Tannic Polyphenols (NTP) were estimated as 2.43% of the total polyphenols in the herb. Four diets were formulated three of which contained 1% each of the parts analysed (APL = leaves, APS = stems and APR = roots) and not containing Andrographis paniculata (APO) which was used as the control and tested for digestibility via in vitro gas production technique. The results indicated that VFAs, IVDMD, gas production and pH of the rumen fluid were not significantly affected (p>0.05) by the experimental diets except for ammonia (p<0.05). The results suggest that goats can utilize nutrients from feeds containing AP without compromising the production of VFA and dry matter digestibility.
  A.B. Idris , S. Md. Nor and R. Rohaida
  A total of six insect Orders comprising 2139 individual were collected for this study. The Hymenopterans had the highest individuals followed by Orthopterans, Coleopterans, Diptyopterans, Hemipterans and Dipterans. There was no specific pattern of abundant for the Hemipteran and Dipteran individuals collected except for Diptyoptera that was more abundant at 800 m altitude than at other altitudes. However, the Hymenopterans were found to higher at the lower altitudes than at the higher altitudes. There was a significant different (P < 0.05) in diversity of insect communities among the altitudes as indicated by the values of Shannon Weiner-Index (H`) with the highest and lowest H` values were at 500 (1.89) and 1100 m (1.33) altitudes respectively. The species richness was relatively highest and lowest at 800 and 500 m altitudes respectively. The Jaccard`s Similarity Index indicated that the insect communities similarity was highest between altitudes 800 and 1100 m (0.467) and lowest between 300 and 1100 m (0.176). There seemed to be two altitudinally associated insect faunas, one in higher altitudes and another one in the lower altitudes. The transition between the two assemblages is between 500 and 800 m altitudes.
  A.B. Idris and J. Hainidah
  The present study was carried out to observe the differential effect of logged over forests of the Langat Basin in Selangor, Malaysia on diversity of Ichneumonid wasps. A total of 732 ichneumonid individuals comprising 16 subfamilies (45.7% of the world recorded ichneumonid subfamily) and 136 morphospecies were successfully collected. Of this 10 subfamilies were recorded in HSUKM while HSKLU and HSKLS had 12 and 14 subfamilies respectively. However, the HSUKM had the less number of ichneumonid species (73) as compared to HSKLU (84) and HSKLS (78). There were nine subfamilies recorded in all forest with the Cryptinae members was the most abundance representing 62.4% of the ichneumonid individuals collected. There was a significantly different (P < 0.05) in the mean number of ichneumonid individuals collected among forests with the HSUKM had HSKLS had the highest and lowest respectively. This result showed that the small, fragmented and isolated HSUKM capable of acting as refuge for the certain ichneumonid species. Ichneumonid diversity was significantly higher at HSKLS and HSKLU than at HSUKM. The Jaccard`s Coefficient Index (percent species similarity) among forests was 36.1, 36.5 and 38.5% between HSKLU and HSKLS, HSKLU and HSUKM, HSUKM and HSKLS respectively. Based on Jaccard`s Coefficient Index there seemed to be two community assemblages exist between these three forests. First is between HSKLS and HSUKM and another one is between HSKLU and HSKLS and HSUKM. In general, distances from forest`s edge into the forest seemed to have no influence on abundant and species composition, diversity and similarity of ichneumonid.
  A.B. Idris and Z. Hasmawati
  An ecological study of braconid wasps with special emphasis on the subfamily microgastrinae was conducted in three different logged and fragmented forests (HSUKM, HSKLU and HSKLS). Sampling was done for one week per month starting from July to November 2001 using nine Malaise traps per forest. A total of 953 braconidae individuals comprising 19 subfamilies and 91 species (morphospecies) were collected. Of this, 195 individuals were collected at HSUKM, 414 individuals at HSKLU and 344 individuals at HSKLS. The microgastrinae, gnampthodontinae and rogadinae individuals were the most abundant in all forests having 427, 133 and 98 individuals respectively. Of the eight Microgastrinae species recorded, Sp4 was the most abundant in all forests but did not clearly indicate its preference to either older or younger regeneration forests. However, its presence seemed to be related to the forest size. Although HSUKM had the lowest microgastrines individuals, it had the highest diversity of microgastrines species compared with other forests. Results also showed that using value of H`(Shannon diversity index) this group of parasitoid has potential to be used as a biological indicator of environmental health or habitat disturbance status. Species similarity between the forests is somewhat higher (> 70%) but results suggested that the closer the forests the higher would be percent of species overlapped (shared). There were two different microgastrines community assemblages between the forests observed. The possible effect of size and distances between the logged over forests on the parasitoid abundance, diversity and species similarity are discussed.
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