We compared the shapes and catches of two trawl nets having differing headrope and groundrope configurations based on paired tow data collected by two research vessels (Yoko Maru and Kumamoto Maru) in the East China Sea. According to the paired data, the vertical opening of the net was significantly higher on the Yoko Maru, which employed a headrope kite, than the Kumamoto Maru, which uses floats on the headrope, while the horizontal opening of the net was significantly wider on the Kumamoto Maru than Yoko Maru (p < 0.01). According to generalized linear model (GLM) analysis of paired data, the capture of Dentex hypselosomus and Photololigo edulis increased when either or both the vertical and horizontal openings of the net of Yoko Maru increased or the horizontal opening of the net of Kumamoto Maru decreased. The catch of these fishes was estimated to be 0.9–4.0 times greater for Yoko Maru compared with Kumamoto Maru, depending on the vertical opening of the net of Yoko Maru. The catch of Champsodon snyderi was only influenced by the horizontal opening of the net, while for two Carangidae species, Trachurus japonicus and Kaiwarinus equula, no influence of the net shape was detected.

我们根据东海两艘研究船（横河丸和熊本丸丸）收集的成对拖曳数据，比较了具有不同头绳和地绳构型的两个拖网的形状和捕获量。根据配对的数据，使用头状风筝的洋子丸的网的垂直开口要比在头上使用浮子的熊本丸的网的垂直开口要高，而在头上使用浮子的熊本丸的网的垂直开口要大得多。熊本丸比丸子洋子（p <0.01）。根据配对数据的广义线性模型（GLM）分析，捕获了Dentex hypselosomus和当横须丸的网的垂直和水平开口中的一个或两个都增加或熊本丸状的网的水平开口中的一个或两个都增加时，紫罗兰可食性增加。与熊本丸丸相比，横须丸丸的这些鱼的捕捞量估计是0.9-4.0倍，这取决于横丸丸网的垂直开口。香樟的渔获量仅受网的水平开放的影响，而对于两种Car科，日本Tra鱼和海螯虾，未检测到网形的影响。