影响库蚊幼虫摄食鱼腥藻的因素
FACTORS AFFECTING FEEDING ABILITY OF CULEX PIPIENS LARVAE ON ANABAENA
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摘要: 在实验室条件下,致乏库蚊幼虫可大量摄食鱼腥藻,并能消化利用,完成生活史。鱼腥藻在蚊幼虫肠道中滞留时间约6h,酵母约5h,鱼腥藻比酵母稍难消化。对比幼虫孵化至化蛹周期,饲喂鱼腥藻为194h,而饲喂酵母则为142h,饲喂鱼腥藻比饲喂酵母延缓了蚊幼虫期52h。致乏库蚊幼虫摄食鱼腥藻的适宜条件为:pH7—8,温度25—30℃,藻液浓度愈高,摄食越多。随着蚊幼虫的生长,摄食量递增。Abstract: Under laboratory condition, the larvae of Culex pipiens Fatigans may feed a lot on Anabaena sp. and complete their life cycle. The retention time of Anabaena sp. in larval intestine was about 6 hours, while that of saccharomyces was about 5 hours, meaning that Anabaena sp is not so digestible for the larvae. From hatching to pupation, the larvae fed with Anabaena sp. lasted 194 hours and those fed with Saccharomyces were 142 hours, showing that the duration for complete larval stage of the former is 52 hours longer than that of the latter. By test, the optimum feeding conditions for mosquito larvae on Anabaena sp. are 7-8 in pHand 25-30℃ in water temperature. An increase in feeding quantity was observed when Anabaena sp. increases in density or mosquito larvae increased in size.
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Keywords:
- Culex pipiens /
- Anabaena sp /
- Feed
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