Trawl catch data from Nansen Legacy Cruise - Arctic Basin Joint Cruise 2-2

Trawl catch data from the Nansen Legacy Cruise - Arctic Basin Joint Cruise 2-2 in the Eurasian Basin during August-September 2021. Two pelagic trawls were used resulting in twelve trawl stations in pairs at six locations: eight stations with a Harstad trawl targeting pelagic fish and four stations with a macroplankton trawl for catching larger zooplankton. The Harstad 320 trawl is a standard Norwegian pelagic trawl for pelagic fish (capelin, herring and juveniles) in northern areas and was used with modified rigging. The modified rigging included wire instead of spectra sweeps (both 60 m long), reducing the total buoyancy of the trawl net (from 1047 kg to 50 kg), and applying 150 kg weights in front of each lower wing and a 40 kg weight at the end of the cod-end. The macroplankton 92 m trawl (trawl opening area of ~36 m2) was used with ordinary rigging, except that 40 kg weight was added at the back part of the cod-end. The macroplankton trawl is a non-graded trawl with 8 mm mesh opening (EN ISO 1107:2003) from the front of the trawl to the cod-end. More information about the trawling specifications and operations can be found in {add link when paper is published}. The data set include station information, trawl catch data (wet weight in g nm-1) and individual length measurements.

本数据集源自2021年8月至9月期间在欧亚大陆架进行的Nansen Legacy巡航联合巡航2-2号航次，收集了捕捞数据。该航次采用了两种浮游生物拖网，分别在六个位置设置了十二对拖网站：其中八个站位使用哈斯塔德拖网针对浮游鱼类进行捕捞，四个站位则使用大型浮游生物拖网以捕捉较大的浮游动物。哈斯塔德320型拖网是适用于北半球浮游鱼类（如鲱鱼、鲭鱼和幼鱼）的标准挪威浮游生物拖网，并采用了改良的装备。改良装备包括使用钢丝而非光谱扫帚（均为60米长），从而降低了拖网网具的总浮力（从1047千克降至50千克），并在每个下翼前增加了150千克的重物，以及在每个鱼尾末端增加了40千克的重物。大型浮游生物拖网（拖网开口面积约为36平方米）则采用常规装备，仅在鱼尾末端增加了40千克的重物。该大型浮游生物拖网为非分级拖网，网眼尺寸为8毫米（EN ISO 1107:2003），从拖网前端至鱼尾末端。更多关于拖网规格和操作的信息，可在论文发表后查阅{待论文发表时补充链接}。数据集包含站位信息、拖网捕捞数据（湿重以克每立方米纳米计）以及个体长度测量数据。