Abundance data of planktonic cnidarians collected during the ABRACOS 1 and 2 surveys performed along the northeast Brazilian continental shelf, slope and open ocean

abundance data (individuals.100 m-3) of planktonic cnidarians collected during two “acoustics along the brazilian coast” surveys (abracos 1 and abracos 2) performed along the northeast brazilian continental shelf and slope between 5 and 9° s and around oceanic seamounts and islands from fernando de noronha ridge, including the fernando de noronha archipelago itself and the rocas atoll. the surveys were carried out on board the french oceanographic vessel r/v antea in austral spring (september–october 2015) and autumn (april–may 2017). planktonic cnidarians were sorted from zooplankton samples collected at 34 and 45 stations in spring and autumn, respectively. samples were collected through oblique hauls, with a bongo net with a 300 µm mesh size and 0.6 m mouth opening. the water column was sampled from near the bottom to the surface over the continental shelf and from 200 m to the surface in the offshore. the net was towed at approximately 2 knots, at various times of day and night.

在“巴西海岸声学调查”的两次调查（Abracos 1 和 Abracos 2）期间，于巴西东北部大陆架和斜坡（5°至9° S）以及费尔南多·德·诺里奥角脊附近的海洋山丘和岛屿（包括费尔南多·德·诺里奥群岛本身和罗卡斯环礁）收集了浮游腔肠动物的丰度数据（个体密度，每立方米100个）。这些调查分别于南半球春季（2015年9月至10月）和秋季（2017年4月至5月）在法国海洋研究船R/V Antea上实施。在春季和秋季，分别从34个和45个站位收集的浮游动物样本中分离出浮游腔肠动物。样本通过斜拖法采集，使用300微米网孔大小的邦戈网和0.6米的口门。水柱样本从大陆架底部到表层采集，离岸区域则从200米到表层。网具以大约2节的速度在不同昼夜时段拖曳。