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Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
Sponsored by:Chinese Society of Entomological;institute of zoology, chinese academy of sciences;
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Your Position :Home->Past Journals Catalog->2023年60 No.5

Improved laboratory conditions for rearing Simulium xingyiense
Author of the article:YANG Chen, XUN Hui, ZHAO Na, ZHANG Hong-Wei, LI Shi-Mei, GAO Han, XIU Jiang-Fan, YANG Ming
Author's Workplace:Department of Biology and Key Laboratory of Medical Entomology, School of Basic Medicine, Guizhou Medical University
Key Words:Simuliidae; Simulium xingyiense; rearing methods; oviposition
Abstract:

[Objectives]  To improve current rearing methods for Simulium xingyiense to enable the maintenance of two consecutive generations under laboratory conditions. [Methods]  We designed and built emergence cups, mating tubes, blood-feeding apparatus and oviposition tubes, and modified a commercially available miniature aquarium for hatching eggs and rearing successive generations. The first generation was reared as follows: pupae were collected in the field and placed in emergence cups until adults emerged. Adults were then transferred to mating tubes for 30 minutes after which females were transferred to the blood-feeding apparatus for 90 minutes. Engorged females were placed in oviposition tubes until they laid eggs, which were then hatched in the modified aquarium and reared until the larvae pupated. The second generation was reared by repeating these steps with pupae from the first generation. All experiments were carried out at a temperature of 20 ℃ and a relative humidity of 70%. The effects of different feeding media temperatures and compositions on engorgement and oviposition rates were measured and compared. [Results]  Serum medium enriched with ATP was found to be the most appealing to female flies. The highest engorgement rate was measured at a medium temperature of 34 ℃. Female flies preferred bovine serum medium, and the higher its serum content, the higher their oviposition rate. Under the above optimal conditions, the female engorgement rate was 25.3%, the oviposition rate was 29.4%, each female produced an average of 163.5 eggs and the hatching rate was 85.5%. The larval stage lasted 13-15 days with a pupation rate of 10.7%. Adults emerged after 4-6 days at an emergence rate of 95.2%. [Conclusion]  Two consecutive generations of S. xingyiense can be reared from pupae under laboratory conditions for subsequent molecular experiments. However, the pupation rate was low, so finding a way to increase this would further improve the captive rearing of this species.

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