Feeding preferences of the endangered diving beetle Cybister tripunctatus orientalis Gschwendtner (Coleoptera : Dytiscidae)
Feeding preferences of the endangered diving beetle Cybister tripunctatus orientalis Gschwendtner (Coleoptera : Dytiscidae)
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濒临灭绝的潜水甲虫 Cybister tripunctatus orientalis Gschwendtner（鞘翅目：Dytiscidae）的摄食偏好
DOI：
10.1155/2012/139714
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Inatani Y
中科院分区：
文献类型：
--
作者：
Ohba S;Inatani Y
日本大部分地区的Cybister tripunctatus orientalis Gschwendtner潜水甲虫的数量正在下降，在日本47个都道府县中，有34个都被列入物种红色数据名录。然而，关于C的基本生态信息。 Tripunctatus orientalis 的食性等特征仍然未知。为了阐明C.的食性。三斑幼虫，以2龄和3龄幼虫进行取食偏好实验。蜻蜓若虫消耗的数量显着高于蝌蚪消耗的数量，表明C. Tripunctatus orientalislarvae 更喜欢蜻蜓若虫而不是蝌蚪。此外，C的所有一龄幼虫。当给它们提供静止的蜻蜓若虫时，东方三蓬蝽发育成第二龄，但当给它们提供静止的蝌蚪时，它们的成活率较低。这些结果表明C. Tripunctatus orientalislarvae 更喜欢昆虫而不是脊椎动物。
The numbers ofCybister tripunctatus orientalisGschwendtner diving beetles are declining in most regions of Japan, and it is included in the Red Data List of species in 34 of 47 prefectures of Japan. However, basic ecological information aboutC. tripunctatus orientalis, such as its feeding habits, remains unknown. In order to elucidate the feeding habits ofC. tripunctatus orientalislarvae, feeding preference experiments were carried out in 2nd and 3rd instar larvae. The number of Odonata nymphs consumed was significantly higher than the number of tadpoles consumed, indicating thatC. tripunctatus orientalislarvae prefer Odonata nymphs to tadpoles. In addition, all the first instar larvae ofC. tripunctatus orientalisdeveloped into second instars when they were supplied with motionless Odonata nymphs, but their survival rate was lower when they were supplied with motionless tadpoles. These results suggest thatC. tripunctatus orientalislarvae prefer insects to vertebrates.