Bullock R W, Guttridge T L, Cowx I G, Elliott M, Gruber S H
Bimini Biological Field Station Foundation, South Bimini, Bahamas.
Hull International Fisheries Institute (HIFI), University of Hull, Hull, HU6 7RX, U.K.
J Fish Biol. 2015 Dec;87(6):1342-54. doi: 10.1111/jfb.12808. Epub 2015 Oct 29.
Behavioural responses of lemon sharks Negaprion brevirostris to a fin-mounted tag package (CEFAS G6A tri-axial accelerometer with epoxied Sonotronics PT4 acoustic transmitter) were measured in a controlled captive environment (n = 10, total length, LT range 80-140 cm) and in free-ranging sharks upon release (n = 7, LT range 100-160 cm). No changes were detected in behaviour (i.e. swimming speed, tailbeat frequency, time spent resting and frequency of chafing) between control and tagged captive shark trials, suggesting that the tag package itself does not alter behaviour. In the free-ranging trials, an initial period of elevated swimming activity was found in all individuals (represented by overall dynamic body acceleration). Negaprion brevirostris, however, appeared to recover quickly, returning to a steady swimming state between 2 and 35 min after release. Post-release tracking found that all sharks swim immediately for the shoreline and remain within 100 m of shore for prolonged periods. Hence, although N. brevirostris are capable of quick adaptation to stressors and demonstrate rapid recovery in terms of activity, tracking data suggest that they may modify their spatial use patterns post release. This research is important in separating deviation in behaviour due to environmental stressors from artefacts caused by experimental techniques.
在可控的圈养环境中（n = 10，全长，LT范围80 - 140厘米）以及放归后的野生鲨鱼中（n = 7，LT范围100 - 160厘米），测量了柠檬鲨（Negaprion brevirostris）对鳍部安装的标记包（带有环氧树脂封装的Sonotronics PT4声学发射器的CEFAS G6A三轴加速度计）的行为反应。在对照和标记的圈养鲨鱼试验之间，未检测到行为（即游泳速度、尾摆频率、休息时间和摩擦频率）的变化，这表明标记包本身不会改变行为。在野生试验中，所有个体都出现了初始游泳活动增强的时期（以总体动态身体加速度表示）。然而，短吻柠檬鲨似乎恢复得很快，在放归后2至35分钟内恢复到稳定的游泳状态。放归后的追踪发现，所有鲨鱼立即游向海岸线，并在距海岸100米范围内长时间停留。因此，尽管短吻柠檬鲨能够快速适应应激源并在活动方面表现出快速恢复，但追踪数据表明它们在放归后可能会改变其空间利用模式。这项研究对于区分环境应激源导致的行为偏差和实验技术造成的人为影响非常重要。
