Biology and Living Resources, Rosenstiel School of Marine and Atmospheric Science, 4600 Rickenbacker Causeway, Miami, FL, 33149, USA.
Fish Physiol Biochem. 1990 May;8(3):207-10. doi: 10.1007/BF00004459.
Tonic immobility (TI) is an unlearned behavioral response characterized by a state of immobility and torpor. Effect of inter-trial interval on duration of tonic immobility was assessed in thirty, juvenile lemon sharks (Negaprion brevirostris). Regression analyses showed that massed trials of 12 per session increased the average duration of tonic immobility by 475 sec compared to spaced trials of 1 per session. Each experiment was composed of 24 trials. TI is stable and durations much longer in the lemon shark than for other sharks. These findings have enabled us to develop a quantitative bioassay for use in testing chemical shark repellents.
僵直不动（TI）是一种未经学习的行为反应，其特征是处于不动和迟钝状态。在 30 只幼年柠檬鲨（Negaprion brevirostris）中，评估了试验间间隔对僵直不动持续时间的影响。回归分析表明，与每 session 1 次的间隔试验相比，每 session 12 次的密集试验使平均僵直不动持续时间增加了 475 秒。每个实验由 24 次试验组成。在柠檬鲨中，TI 是稳定的，持续时间比其他鲨鱼长得多。这些发现使我们能够开发出一种定量生物测定法，用于测试化学鲨鱼驱避剂。
