Kajian keatas beberapa aspek ekologi culex quinquefasciatus say (diptera:culicidae) di kawasan kediaman di Pulau Pinang

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Date
1996-04
Authors
Saad, Ahmad Ralim Bin
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Abstract
Drains and trenches filled 'Hith polluted water are the major breeding habitats for Culex quinquefasciatus in the Bandar Bayan Baru residential area. The i mma t: ur e stages were found to be present among AxorwpLlS .-:.;p and Imper ita sp grasses as well as garbage found along the drainage system~ The number of larvae varied consider ably and showed no correlation (p>0.05) to rainfall, t~mperature, pH, conductivity, dissolve oxygen and biochemical oxygen demand whereas in the trenches, only the conductivity value correlated (p<0.05) with the number o£ larvae per dipper. However, t test showed that there was no significant difference (p>0.05) between the number of larvae per dipper at both sites throughout this study period. Sampling of adt-~:.t mosquitoE:s v;as carried out: using CDC light trap baitec1 1.vith d.ry ice, chicker: baited trap, resting bo~·:es and r.'he bare leg catch t·echnique (BLC). Approximately 2,701 Cx. quinquefasciatus adults were successfully collected using these four techniques. From this approximate total, 3.4% (93). were collected using the CDC light trap baited with dry ice, 4.0\. ('108) using the chicken baited trap, 7.8'3.; (212) from r·esting boxes and 84.7% (2,288) using the BLC technique. An ANOVA test showed . at least one mean was significantly different (p<0.05). A xii Duncan multiple range test showed that the BLC technique was the only technique that showed an obvious difference compared to the other traps tested. It was also found that there was no significant difference (p>0.05) in the total numbers of mosquitoes present at night during this study period. The BLC technique was used to study the biting patterns of ex. quinquefasciatus in Sungai Nibong Kecil village, Penang. During the sampling period, a total of 7, 284 mosquitoes were collected inside and outside of .two buildings of which, 31.89% (2,323) were collected inside the building and 68.11% (4,961) were collected outside. A t test indicated that the difference was significant (p<O.OS). The peak biting activity occured between 0000 hours and 0200 hours, after which i't declined. A t test showed no significant difference (p>0.05) for the number of mosquitoes caught before and after 0100 hours both outside and inside the building. Egg rafts were abundant at the end of December and February, early March, middle of May, end of July and throughout September. The number, of adult mosquitoes were found to increase during the second week of September, second week of November, early December, end of January, end of February, early March, early April, end of July, early August, the third week of August and in early September. The nurr1ber of egg rafts showed a positive correlation with the number of adult mosquitoes (p<0.05). On the other hand, rainfall, temperature and relative humidity showed no correlation (p>0.05) with the number of egg rafts and adult mosquitoes.
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Beberapa aspek ekologi , Culex quinquefasciatus say (diptera:culicidae)
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