New Zealand scampi (Metanephrops challengeri) is a commercially important deep-water lobster species that is caught by bottom trawling on areas of muddy seafloor on the continental shelf below 300 m. Efforts are being made to develop lower impact potting methods to harvest scampi, however, they can only be caught when out of their burrows and searching for food. This emergent food searching behaviour appears to be associated with periods of higher tidal flow. Such water flow will increase turbulence along the sea floor, which has been observed to improve the efficiency of chemosensory food searching in some lobster species. Consequently, this study examined the food search behaviour of scampi in response to odours from two types of bait (mackerel and mussel) in both turbulent and laminar flows. Scampi were more efficient at foraging in the turbulent flow than in the laminar flow, using shorter search paths in response to both types of bait. Scampi in the turbulent flow reached the mussel bait 44% faster and with lower mean heading angles than in laminar flow. However, there was no difference between the flow regimes for the mackerel bait. The pattern of orientation behaviour was similar under both flow regimes, suggesting that the scampi were using the same orientation strategy, but it was more accurate in turbulent flows. The results show that the foraging efficiency of scampi improves in turbulent conditions and that this may explain their increased emergent behaviour during periods of higher tidal flows.

中文翻译：

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深海龙虾在湍流层流和层流异味羽流中的方向和食物搜寻行为

新西兰海螯虾（Metanephrops Challengeri）是一种商业上重要的深水龙虾物种，在300 m以下大陆架的泥泞海底区域被底拖网捕获。人们正在努力开发影响较小的盆栽方法来收获小鳞片，但是，只有当它们离开洞穴并寻找食物时，它们才能被捕获。这种紧急食物搜寻行为似乎与潮汐流量较高的时期有关。这样的水流会增加沿海底的湍流，已经观察到这种湍流可以提高某些龙虾种类中化学感应食物的搜索效率。因此，本研究考察了湍流和层流中对两种诱饵（鲭鱼和贻贝）的气味做出反应而对scampi进行食物搜索的行为。Scampi在湍流中觅食比在层流中觅食更有效，对两种类型的诱饵都使用较短的搜索路径。与层流相比，湍流中的Scampi到达贻贝诱饵的速度快44％，平均航向角更低。但是，鲭鱼饵的流动方式之间没有差异。在两种流动方式下，定向行为的模式都相似，这表明小便使用相同的定向策略，但在湍流中更准确。结果表明，在湍流条件下，小便的觅食效率提高，这可以解释在潮汐流量较高时小便的出苗行为增加。与层流相比，湍流中的Scampi到达贻贝诱饵的速度快44％，平均航向角更低。但是，鲭鱼饵的流动方式之间没有差异。在两种流动方式下，定向行为的模式都相似，这表明小便使用相同的定向策略，但在湍流中更准确。结果表明，在湍流条件下，小便的觅食效率提高，这可以解释在潮汐流量较高时小便的出苗行为增加。与层流相比，湍流中的Scampi到达贻贝诱饵的速度快44％，平均航向角更低。但是，鲭鱼饵的流动方式之间没有差异。在两种流动方式下，定向行为的模式都相似，这表明小海豚使用相同的定向策略，但在湍流中更准确。结果表明，在湍流条件下，小便的觅食效率提高，这可以解释在潮汐流量较高时小便的出苗行为增加。这表明小海豚使用相同的定向策略，但在湍流中更准确。结果表明，在动荡的条件下，Scampi的觅食效率提高，这可能解释了在潮汐流量较高时它们的突生行为增加。这表明小海豚使用相同的定向策略，但在湍流中更准确。结果表明，在湍流条件下，小便的觅食效率提高，这可以解释在潮汐流量较高时小便的出苗行为增加。