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- 저자 : Faezah Syukriah Sabtu (검색결과 2 건)
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Faezah Syukriah Sabtu,Abdul Hafiz Ab Majid 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.4
Tetraponera rufonigra, commonly known as the arboreal bicolored ant has gained its notoriety as one of the medically-important pest insects in Malaysia. T. rufonigra is recognizable by its excruciating sting, causing a severe anaphylaxis especially to those with the history of allergy. In this study, genetic diversity and population structure of T. rufonigra populations were examined based on a 503 base pair fragment of the mitochondrial DNA Cytochrome Oxidase I (COI) gene. Specimens were collected from six different localities in urban areas in the eastern part of Penang Island. The six populations exhibited high pairwise genetic differentiation (FST), ranging from 0.42 to 1.00 and low gene flow (Nm), ranging from 0.00 to 0.69, except for populations of CSA and CH (FST =0.0, Nm =−1813.68). From AMOVA analysis, a high genetic variation was observed among populations i.e. 99.58% (FST =0.996 p=0.000 ± 0.000). These results provided the basic information for entomologists to better understand the difference of genetic structure of T. rufonigra at a population level and can be further utilized to estimate the contributing factors in the genetic differentiation of this species in urban areas. Our results suggested that the population structure and the gene flow of T. rufonigra in some studied areas might have been affected by the dispersal ability of the insect, environmental conditions, and/or human-mediated dispersal, while, populations of other areas retained their gene flow. These findings might provide useful baseline information for the implementation of area-wide pest management as well as for further characterization of genetic variation and population structure of this medically-important pest.
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Faezah Syukriah Sabtu,Abdul Hafiz Ab Majid 한국응용곤충학회 2018 Journal of Asia-Pacific Entomology Vol.21 No.3
Host-plant preferences of Tetraponera rufonigra Jerdon (Hymenoptera: Formicidae) were assessed by field measurement in relation to the types of trash found in the surrounding tree perimeters. The correlations between the density of T. rufonigra and the plants (types of trash and levels of infestation) were determined based on the data gathered at 34 study sites in the Eastern part of the Penang Island to clarify the density differences of T. rufonigra among the sites. A simple linear regression analysis was also employed to assess the effects of environmental parameters i.e. UV light, temperature and humidity on the density of T. rufonigra. No significant difference was found between the infestation level at each site and the types of trash. Six species were identified as host-plant preferences of T. rufonigra i.e. Cassia fistula L., Azadirachta indica A. Juss., Mimusops elengi L., Delonix regia (Hook), Cerberra odollam Gaertn and Tabebuia rosea (Bertol.). These tree species were recorded for the first time as the most preferred host trees by T. rufonigra in Malaysia. The results also identified that T. rufonigra preferred the trees with high humidity level, suitable surrounding temperature and UV light as their habitats
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