Park Yung Chul, Grandcolas Philippe, Choe Jae Chun
School of Biological Sciences, Seoul National University, South Korea.
Zoolog Sci. 2002 Oct;19(10):1133-9. doi: 10.2108/zsj.19.1133.
Korean populations of the genus Cryptocercus occur in forested mountains throughout South Korea. They live in monogamous associations in which parents care for their young in complex woody galleries. Single paired adults (23.2%) and one or both parents with their offspring (28.1%) were found most frequently in the field. Among single-parent families adult females (6.7%) were observed more frequently than adult males (1.4%). In families with single or both parents, the mean brood size was 21.6+/-9.4. Oothecae were observed from mid-June to the late July. Oothecae were found in the galleries of only paired adults and never found in families with nymphs. The mean number of eggs per female was 73.7+/-29.8. Most of neonates grew to the third or fourth instar prior to the winter. During the winter, C. kyebangensis in the field remained almost frozen in their galleries, but ones kept in the laboratory continued to grow during winter. Some characteristics of proctodeal feeding behavior are also described based on laboratory observations. We propose that the cold temperate climate, especially of the winter season, is one of the most important causes for the evolution of unusual life history of Cryptocercus including delayed development of nymphs.
韩国的隐尾蠊种群分布于韩国各地的山林中。它们以一夫一妻制群居，父母在复杂的木质虫道中照顾幼崽。在野外，最常发现的是成对的成虫（23.2%）以及一方或双方父母与后代在一起的情况（28.1%）。在单亲家庭中，成年雌性（6.7%）比成年雄性（1.4%）更常被观察到。在有单亲或双亲的家庭中，平均一窝的数量为21.6±9.4。卵鞘在6月中旬至7月下旬被观察到。卵鞘仅在成对成虫的虫道中发现，从未在有若虫的家庭中发现。每只雌性的平均卵数为73.7±29.8。大多数新生儿在冬季来临前成长到第三或第四龄。在冬季，野外的庆尚隐尾蠊在其虫道中几乎处于冻僵状态，但在实验室饲养的个体在冬季仍继续生长。基于实验室观察，还描述了直肠取食行为的一些特征。我们认为，寒冷的温带气候，尤其是冬季，是导致隐尾蠊不寻常生活史进化的最重要原因之一，包括若虫发育延迟。
