Effects of nutrient and salinity in egg and larval development of <i>Aedes togoi</i>

, Lee, J S; , Hong, H K

doi:1995.33.1.9

Korean J Parasito > Volume 33(1):1995 > Article

Original Article


Korean J Parasitol. 1995 Mar;33(1):9-18. English. Published online Mar 20, 1995. http://dx.doi.org/10.3347/kjp.1995.33.1.9
Copyright © 1995 by The Korean Society for Parasitology


Effects of nutrient and salinity in egg and larval development of Aedes togoi
Jong-Soo Lee,^*¹ and Han-Kee Hong²
¹Division of Parasitology, National Institute of Health, Seoul 122-020, Korea.
²Department of Agrobiology, Dongguk University, Seoul 100-715, Korea.

Received December 09, 1994; Accepted February 11, 1995.
Abstract
The study made an observation on periodicity of oviposition, and the effects of nutrient and salinity in egg and larval development of Aedes togoi, and the results are summarized as follows: The 53.9% mosquitoes of one feeding laid eggs once, 26.9% laid twice and 19.2% laid three times. Autogenous rate of Aedes togoi reared in three different nutrient groups in larval sage was 6.9% in 0.8 mg/larva, 22.5% in 1.6 mg/larva and 44.4% in 2.4 mg/larva. The oviposition rate according to different salinity of the oviposition sites (0%, 0.5%, 1.0%, 2.0% and 4.0%) was 25.2% in distilled water, 36.2% in 0.5% salinity, 23.5% in 1.0% salinity and 14.6% in 2.0% salinity. Developing period of the aquatic stage of male Aedes togoi in 25℃ were shorter (10.73 days) than females (11.85 days). The most effective concentration of salinity for the developing period was 1.0% which took 9.25 days in males and 10.44 days in females. In the developmental status of the follicles according to nutrition in the larval stage, the numbers of follicles of groups fed 0.8 mg, 1.6 mg and 2.4 mg per larva were 180.7, 197.5 and 202 respectively. The result of ovary dissection on the 10th day after emergence, three different nutrition groups were in Christopher's stage IIa mostly; each 71.0%, 61.1% and 39.9% of the total follicles and autogenous females observed.

Figures


	Fig. 1 Follicualr development and relic formation in ovarioles of Aedes togoi (Christopher's stage).

Tables


	Table 1 Periodicity of oviposition of Aedes togoi


	Table 2 Oviposition period and interval of oviposition of Aedes togoi


	Table 3 Autogenous rate of Aedes togoi in Sokcho and Yosu, 1991


	Table 4 Number of eggs 1aid at autogenic and anautogenic condition


	Table 5 Number of eggs 1aid at autogenic and autogenous rate of Aedes togoi females reared under three different food quantities during the larval stage


	Table 6 Selection of oviposition site by Aedes togoi females in various saline concentrations


	Table 7 Larval developing period of males and females of Aedes togoi in various saline concentrations reared at 20℃


	Table 8 Larval developing of males and females of Aedes togoi in various saline concentrations reared at 25℃


	Table 9 Number of the ovarioles number of Aedes togoi females reared under three different food quantities during the larval stage


	Table 10 Ovaliole number and follicle development of Aedes togoi females reared under three different food quantities in the larval stage

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