Distribution of micronekton was investigated during early summer of 2013, using data from a cruise covering the central parts of four north Atlantic basins, the Norwegian Sea (NS), Iceland Sea (ICS), Irminger Sea (IRS), and Labrador Sea (LS). Continuous underway acoustics mapped vertical and horizontal distributions, and trawl sampling provided data on biomass and taxonomic composition. The hull mounted acoustics and trawl catches suggested that, among the four basins, biomass of epipelagic, larger nektonic species (>20 cm length) during the cruise was highest in the NS and ICS basins, while mesopelagic non-gelatinous micronekton biomass peaked in the IRS and LS basins. Biomass of Scyphozoa was also about 1 order of magnitude higher in IRS and LS compared to ICS and NS. In ICS and NS, crustaceans made up about 50% of total non-gelatinous micronekton biomass, with fish making up less than 20% of total biomass. In contrast, fish constituted more than 60% of non-gelatinous biomass of catches in IRS and LS. In catches from ICS and NS the myctophid Benthosema glaciale dominated the catches, whereas bathylagids, gonostomatids, barracudinas and stomiids contributed to the high biomass densities of fish in IRS and LS. In addition to the differences in biomass between the basins, the acoustic measurements suggested gradients within the north-eastern basins, and large differences in vertical distribution of biomass between the basins during the cruise.

使用覆盖北大西洋四个海域，挪威海（NS），冰岛海（ICS），艾明格海（IRS）和拉布拉多海（LS）四个中部海域的航行数据，对微血管的分布进行了调查（2013年夏季初） ）。连续的行进声学绘制了垂直和水平分布，拖网采样提供了有关生物量和生物分类组成的数据。船体安装的声波和拖网渔获物表明，在四个海域中，上，上游较大的中性物种（> 20 cm长）的生物量在NS和ICS海域中最高，而中生的非胶质微神经元生物量在海域中达到峰值。 IRS和LS流域。与ICS和NS相比，IRS和LS中的鼠尾草生物量也高约1个数量级。在ICS和NS中，甲壳类约占非胶状微细胞总生物量的50％，而鱼类仅占不到总生物量的20％。相反，在IRS和LS中，鱼占渔获物非胶状生物量的60％以上。在ICS和NS的捕捞中Benthosema冰川为主的渔获物，而bathylagids，gonostomatids，裸蜥鱼科和stomiids促成了国税局和LS鱼类的高生物量密度。除了流域之间生物量的差异外，声学测量还显示了东北流域内的梯度，并且在航行期间流域之间生物量的垂直分布也存在较大差异。