Abstract Bottom trawling is a fishing method that typically produces high levels of bycatch and is associated with benthic habitat damage. Pots (also known as creels or traps) are used as a less impactful alternative to trawling in a range of crustacean fisheries and has been proposed as a method to harvest New Zealand scampi (Metanephrops challengeri). However, pots designed in Europe for the ecologically similar Norway lobster (Nephrops norvegicus) failed to capture scampi at an economically viable rate. Therefore, a series of laboratory experiments were conducted to investigate the behaviour of scampi around pots and to identify the drivers of successful entries. These experiments were conducted in flume tanks with the entry performance of standard and modified designs contrasted with a control. Scampi were significantly more likely to enter a control pot than either a standard or modified pot entrances. The width of the entranceway was the biggest hinderance to scampi entering pots, as further experiments showed that scampi were significantly more likely to enter the control (15 cm wide) or 12.5 cm entrances than 7.5 cm entrance. The height of the entrances had no impact as the control, 12.5 cm, 10 cm and 7.5 cm high entrances had similar likelihoods of success. Lastly the angle of the ramp also had a significant effect on the likelihood of scampi entering the pots, with a 20° ramp having a higher likelihood of success than the 30°,40° and 60° ramps These results show that scampi require wide, gently sloping entrances to consistently enter pots. Consequently, for a scampi potting fishery to be successful, NZ scampi-specific pot designs should be developed and tested.

中文翻译：

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确定新西兰海虾 Metanephrops Challengeri 入盆的基本指标

摘要 底拖网捕捞是一种捕捞方法，通常会产生大量的副渔获物，并且与底栖栖息地的破坏有关。盆（也称为筒子架或陷阱）在一系列甲壳类渔业中被用作一种影响较小的拖网捕捞替代品，并已被提议作为一种收获新西兰海鱼（Metanephrops Challengeri）的方法。然而，欧洲为生态相似的挪威龙虾 (Nephrops norvegicus) 设计的花盆未能以经济上可行的速度捕获海虾。因此，进行了一系列实验室实验来研究海虾在锅周围的行为并确定成功进入的驱动因素。这些实验是在水槽罐中进行的，标准和改进设计的进入性能与对照相比。Scampi 比标准或修改的锅入口更有可能进入控制锅。入口通道的宽度是海鱼进入花盆的最大障碍，因为进一步的实验表明，与 7.5 厘米的入口相比，海虾更容易进入对照（15 厘米宽）或 12.5 厘米的入口。入口的高度没有影响，因为对照、12.5 厘米、10 厘米和 7.5 厘米高的入口具有相似的成功可能性。最后，斜坡的角度也对虾进入花盆的可能性有显着影响，20° 的斜坡比 30°、40° 和 60° 的斜坡成功的可能性更高。这些结果表明，虾需要宽，轻轻倾斜的入口以始终如一地进入花盆。因此，要使海虾盆栽渔业取得成功，