Phase-dependent locomotor activity in first-stadium nymphs of the desert locust, Schistocerca gregaria: Effects of parental and progeny rearing density
Phase-dependent locomotor activity in first-stadium nymphs of the desert locust, Schistocerca gregaria: Effects of parental and progeny rearing density
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DOI：
10.1016/j.jinsphys.2012.02.007
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发表时间：
2012-05-01
影响因子：
2.2
通讯作者：
Saito, Osamu
中科院分区：
文献类型：
--
作者：
Harano, Ken-ichi;Tanaka, Seiji;Saito, Osamu
利用活动记录仪研究了亲本和子代饲养密度对沙漠蝗Schistocerca gregaria第一龄期幼虫运动活动的影响。从独居（隔离饲养）或群居（群体饲养）蝗虫获得的后代是隔离饲养或以30只若虫为一组饲养的。孵化后拥挤有轻微的影响，平均活动开始后不久的测量，但没有明确的效果，直到第2天，当最大活动在6-24小时的观察是显着高于隔离保持在隔离。另一方面，父母养育密度对自发活动的影响表现在所有年龄（0-2日龄）。群居蝗虫的后代表现出一贯较高的活动比独居蝗虫。在新孵化的，父母养育密度的影响解释了在孵化时，阶段依赖的特征之一，在身体大小的变化。幼体的体色也与自发活动和体重相关。当绿色、独居的和黑色、群居的乌鸦体重相似时，表现出相似的运动活性水平。这些结果表明，父母养育密度间接影响运动活动的后代在孵化后不久，通过影响他们的身体大小作为鸡蛋或孵化。(C)2012爱思唯尔有限公司保留所有权利。
This study examined the effects of parental and progeny rearing density on locomotor activity of 1st-stadium nymphs of the desert locust, Schistocerca gregaria, using an actograph. Progeny obtained from solitarious (isolated-reared) or gregarious (crowd-reared) locusts were reared in isolation or in a group of 30 nymphs. Crowding after hatching had a slight influence on mean activity shortly after the start of measurements, but no clear effect was detected until day 2, when maximum activity during the 6-24 h of observation was significantly higher than that of the nymphs kept in isolation. On the other hand, the effects of parental rearing density on locomotor activity manifested at all ages examined (0-2 days old). Progeny of gregarious locusts showed consistently higher activity than those of solitarious locusts. In newly hatched nymphs, the effect of parental rearing density was explained by variation in body size at hatching, one of the phase-dependent characteristics. Hatchling body color was also correlated with locomotor activity and body weight. Similar levels of locomotor activity were exhibited when green, solitarious and black, gregarious nymphs were similar in body weight. These results suggested that parental rearing density indirectly influences locomotor activity in the progeny shortly after hatching by affecting their body size as eggs or hatchlings. (C) 2012 Elsevier Ltd. All rights reserved.