Baatrup E, Bayley M
Department of Zoology, University of Aarhus, Denmark.
Physiol Behav. 1993 Jul;54(1):83-90. doi: 10.1016/0031-9384(93)90047-j.
The locomotor activity of adult specimens of the wolf spider Pardosa amentata was measured in an open-field setup, using computer-automated colour object video tracking. The x,y coordinates of the animal in the digitized image of the test arena were recorded three times per second during four consecutive 12-h periods, alternating between white and red (lambda > 600 nm) illumination. Male spiders were significantly more locomotor active than female spiders under both lighting conditions. They walked, on average, twice the distance of females, employed higher velocities, and spent less time in quiescence. Both male and female P. amentata were significantly less active in red light (simulated dark environment) than in white light. The results also revealed that P. amentata administers its walking velocity and periods of quiescence according to consistent distributions, which can be approximated by simple mathematical expressions. It was found that this species spends exponentially decreasing time at increasing velocities. The number of quiescent periods, however, follow a power decay distribution at increasing quiescent period duration.
使用计算机自动彩色物体视频跟踪技术，在开放式场地设置中测量成年狼蛛豹蛛（Pardosa amentata）的运动活性。在连续四个12小时的时间段内，每秒记录动物在测试场地数字化图像中的x、y坐标三次，照明在白色和红色（波长>600纳米）之间交替。在两种光照条件下，雄性蜘蛛的运动活性均显著高于雌性蜘蛛。它们平均行走的距离是雌性的两倍，速度更高，静止时间更少。雄性和雌性豹蛛在红光（模拟黑暗环境）下的活性均显著低于白光下。结果还表明，豹蛛根据一致的分布来调节其行走速度和静止时间，这些分布可以用简单的数学表达式近似。研究发现，该物种在速度增加时花费的时间呈指数下降。然而，静止期的数量在静止期持续时间增加时遵循幂衰减分布。
