Amemiya Mio, Sasakawa Kôji
Laboratory of Zoology, Department of Science Education, Faculty of Education, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba-shi, Chiba 263-8522, Japan.
Insects. 2021 Jan 10;12(1):48. doi: 10.3390/insects12010048.
Thanatosis, also called death feigning, is often an antipredator behavior. In insects, it has been reported from species of various orders, but knowledge of this behavior in Hymenoptera is insufficient. This study examined the effects of sex, age (0 or 2 days old), temperature (18 or 25 °C), and background color (white, green, or brown) on thanatosis in the braconid parasitoid wasp . Thanatosis was more frequent in 0-d-old individuals and in females at 18 °C. The duration of thanatosis was longer in females, but this effect of sex was weaker at 18 °C and in 0-d-old individuals. The background color affected neither the frequency nor duration. These results were compared with reports for other insects and predictions based on the life history of this species, and are discussed from an ecological perspective.
假死，也称为装死，通常是一种反捕食者行为。在昆虫中，已报道了各个目物种的假死行为，但膜翅目昆虫的这种行为的相关知识还不足。本研究考察了性别、年龄（0日龄或2日龄）、温度（18或25℃）和背景颜色（白色、绿色或棕色）对茧蜂寄生蜂假死行为的影响。0日龄个体和18℃条件下的雌性假死更为频繁。雌性假死的持续时间更长，但这种性别效应在18℃条件下以及0日龄个体中较弱。背景颜色对假死频率和持续时间均无影响。将这些结果与其他昆虫的报道以及基于该物种生活史的预测进行了比较，并从生态学角度进行了讨论。
