Zooplankton Bongo Net Data from the 2019 and 2020 Gulf of Alaska International Year of the Salmon Expeditions

This record contains zooplankton occurrence data collected in the Gulf of Alaska (GoA) with a bongo net between February 19 - March 15, 2019, and March 14 – April 5, 2020, as part of the International Year of the Salmon High Seas Expedition. The bongo net (3 m length, 250 µm mesh, 50 cm diameter) was deployed at 58 stations, to a depth of 250 m and retrieved vertically at 1 m s-1. Volume of sea water filtered was determined using General Oceanics flowmeters and by multiplying effective distance travelled by the mouth area. After the bongo net deployment and recovery, the net was rinsed down into the cod end. Samples from one cod end were rinsed into a jar and preserved in 4 % formaldehyde for future taxonomic analysis. The other cod end was rinsed into a sieve and transferred below deck where it was subsequently size fractionated (250-500 µm, 500-1000 µm, 1000-2000 µm, 2000-4000 µm, and >4000 µm) onto pre-weighed filters. Individuals larger than 4000 µm were measured, identified to species level, and stored in individual Eppendorf tubes. Size fractionated zooplankton samples were stored on dry ice. This record contains the zooplankton occurrence data from both cod ends, identified to the lowest taxonomic rank possible.本数据集包含2019年2月19日至3月15日、2020年3月14日至4月5日期间，采用邦戈浮游生物网（bongo net）在阿拉斯加湾（Gulf of Alaska，GoA）采集的浮游动物（zooplankton）出现数据，相关采样为国际鲑鱼年公海考察（International Year of the Salmon High Seas Expedition）的组成部分。该邦戈浮游生物网长3米，网目尺寸250微米，口径50厘米，共在58个站位布设，下放至250米水深后以1米每秒的速度垂直回收。过滤海水体积通过通用海洋学流量计（General Oceanics flowmeters）测定，同时通过有效行进距离与网口面积的乘积计算得出。完成邦戈浮游生物网的布放与回收后，将网内样品冲洗至集样囊（cod end）中；取其中一个集样囊的样品冲洗至样品瓶内，以4%甲醛溶液保存，用于后续分类学分析，另一个集样囊的样品则冲洗至筛网中，转移至甲板下方后按粒径分级（250~500微米、500~1000微米、1000~2000微米、2000~4000微米及＞4000微米）过滤至预先称重的滤膜上。粒径大于4000微米的浮游动物个体将被测量、鉴定至物种水平，并分装至独立的艾本德离心管（Eppendorf tubes）中保存；经粒径分级的浮游动物样品均以干冰保存。本数据集包含两个集样囊的浮游动物出现数据，所有样品均鉴定至可达到的最低分类学等级。