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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2016年53 No.4

Factors that induce Brithys crini Fabricius (Lepidoptera: Noctuidae) larvae to play dead
Author of the article:ZHU Min1** WANG Min1 CHEN Li-Qiong1 SHENG Li-Xing1 CHEN Yuan-Sheng2 TU Xiao-Yun1***
Author's Workplace:(1. College of Life Sciences, Jiangxi Normal University, Nanchang 330022, China; 2. Jiangxi Environmental Engineering Vocational College, Ganzhou 341000, China
Key Words:Brithys crini, death-feigning, internal factor, external factor
Abstract:

 [Objectives]  To understand what induces larvae of Brithys crini Fabricius to play dead. [Methods]  The effects of internal and external factors on the frequency and the duration of playing dead were observed. [Results]  (1) The duration of feigned death increased with larval body weight but this trend was not statistically significant. (2) Duration decreased significantly with the number of repeated stimuli. The duration from the 1st to the 10th stimulus (85.6 s) was longer than that from the 11th to the 20th stimulus (67.3 s). (3) The duration of feigned death following mechanical stimulation of 2, 5 and 10 Newtons (N) (82.3, 97.4 and 78.3 s, respectively)was shorter than that after receiving a stimulus of 6 N (157.0 s). The relationship between duration and applied force could be described by a parabolic equation. (4) The duration  following exposure to the sound of wind (65.6 s) was shorter than that following exposure to bird and frog calls (144.8 s and 134.1 s, respectively). (5) There was a significant difference in duration following exposure to different LED sources. Durations of feigned death following red flashing, red, yellow, green, white and blue LED treatments were 54.7, 64.3, 82.7, 90.6, 96.9 and 112.3 s, respectively. The difference in the frequency of feigned death was insignificant among all treatments. [Conclusion]  The larvae of B. crini are induced to play dead by both internal and external factors.

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