Ford Michael J
Animal Ecology Research Group, Department of Zoology, South Parks Road, OX1 3PS, Oxford, England.
Oecologia. 1977 Dec;28(4):333-340. doi: 10.1007/BF00345988.
Pardosa amentata adopts a "sit-and-wait" predation strategy with periodic changes of site. The metabolic costs of this strategy were evaluated using a Gilson respirometer. The respirometer was run at the mean temperatures prevailing month by month in the litter layer from which the experimental animals were collected and equations relating standard respiration rate to spider weight were established for each temperature. The mean value of b, the exponent relating weight to respiration rate, was 0.8011. Active respiration rate was determined at each temperature by using larger experimental flasks containing small glass beads which, in conjunction with the shaker mechanism on the respirometer, ensured that the spiders in the respirometer flasks maintained a fairly consistent level of locomotory activity. It was found that the measured active respiration rate was on average 3.17 times the standard rate. The two respiration rates were combined in the appropriate proportions to calculate the daily energy expenditure of an adult spider exhibiting its normal pattern of activity at different temperatures. It is shown that as locomotory activity is very limited in duration in P. amentata, the associated active respiration rate accounts for only a small proportion of daily respiratory energy losses, 0.36% at 5°C, 0.69% at 10°C, and 1.01% at 15°C.
豹蛛采用“坐等”捕食策略，并会定期更换地点。使用吉尔森呼吸计评估了这种策略的代谢成本。呼吸计在收集实验动物的落叶层逐月盛行的平均温度下运行，并针对每个温度建立了将标准呼吸速率与蜘蛛体重相关联的方程。与体重和呼吸速率相关的指数b的平均值为0.8011。通过使用装有小玻璃珠的较大实验烧瓶在每个温度下测定活跃呼吸速率，这些玻璃珠与呼吸计上的摇动机制一起确保呼吸计烧瓶中的蜘蛛保持相当一致的运动活动水平。结果发现，测得的活跃呼吸速率平均是标准速率的3.17倍。将两种呼吸速率按适当比例组合，以计算成年蜘蛛在不同温度下表现出正常活动模式时的每日能量消耗。结果表明，由于豹蛛的运动活动持续时间非常有限，相关的活跃呼吸速率仅占每日呼吸能量损失的一小部分，在5°C时为0.36%，在10°C时为0.69%，在15°C时为1.01%。
