大栗鳃金龟蒙古亚种成虫交配与生殖习性研究
Study on the Mating and Reproduction of Adult Melolontha hippocastani mongolica Menetries
周宇爝1，蒲德强1，周祖基1，朱天辉1*，韩开华2
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DOI：
作者单位：(1. 四川农业大学森林保护学省级重点实验室，四川雅安625014；2. 康定恩威高原药材野生抚育基地有限责任公司，四川康定626002)
中文关键字：大栗鳃金龟；成虫；交配；产卵；生殖习性
英文关键字：Melolontha hippocastani mongolica Menetries; adult; mating; oviposition; reproduction habit
中文摘要：于2008~2010年在康定对大栗鳃金龟成虫的出土、取食，特别是交配、产卵等方面进行了研究。结果表明：在康定，成虫4月底开始出土，5月中旬至6月下旬为出土高峰期。成虫可进行多次交配，一次交配过程可以分为3个阶段，即交配前、交配中和交配后，平均交配时长为115.6 min±24.4 min (n=10)。交配日节律呈“M”形，分别在中午和晚上有一明显的高峰期。产卵前，成虫在地表以下10 cm左右做一圆形产卵室，将卵产于其中，堆状分布，初产卵粒为浅黄色，随后颜色逐渐变深。每室产卵33.7粒±7.0粒(n=10)。
英文摘要：The habit of emergence, feeding, mating and oviposition of adult Melolontha hippocastani mongolica were investigated in Kangding from 2008 to 2010. The eclosion of adult M. hippocastani mongolica was finished in the end of April with a peak between mid May and the last ten days of June. The adult M. hippocastani mongolica would mate for several times and usually last for 115.6 min±24.4 min (n=10), and the mating rhythm presented a shape of “M” with two peaks at noon and night respectively. Before oviposition, the female would make a round chamber about 10 cmunderground, which was used for laying eggs. New eggs were pale-yellow and the colour would be darkened as time went on. The average egg numbers were 33.7±7.0 per chamber (n=10).