Data on copepodid abundance and stage composition of Calanus finmarchicus was collected with seasonal resolution (5–6 times a year) from four stations along an oceanographic transect across the western Barents Sea Opening over 25 years (1995–2019). The stations were located in the Norwegian Coastal Current (NCC), inflowing Atlantic water (two stations), and near the Arctic polar front south of Bear Island. Mean copepodite abundance in the water column for the four stations increased from a level around 1000–10,000 individuals m⁻² in winter to 30,000–100,000 individuals m⁻² in summer (maximum 670,000 m⁻²). The overwintering (G0) population was dominated by copepodite stage 5 (CV) (40–70%) but with a relatively high fraction also of stage CIV (25–35%) in January. During winter, there was a progressive development of CVs into adult males and females, with mean abundances from 1500 to 4000 adult females m⁻² in April and May for the stations in the NCC and Atlantic water. Young copepodids of the new spring generation (G1) appeared with relatively high abundances in April at the NCC station and in May at the Atlantic water stations. The data showed a gradient of later development from south to north, reflected both in the maturation of the overwintering generation and in the development of the spring generation. Back-calculations based on temperature-dependent development time suggested peak spawning around late April to mid-May for the Atlantic water stations, and a month or so earlier (in March) for the NCC station, during an early phase of the spring phytoplankton growth. The spring generation developed as a distinct cohort but with large interannual variability in numbers. In Atlantic water, the composition of the copepodid developmental stages in August resembled the situation in June, although it was slightly more advanced. This is interpreted to reflect development of a second generation (G2) spawned upstream sometime in June or early July. The June data suggests that only a small fraction of the G1 cohort develops into adults that spawn and form the G2. There was a tendency of increased summer abundance of C. finmarchicus in the inflow region of the southwestern Barents Sea after about 2005. This may be related to the wind regime with more eastward wind-stress at the Barents Sea opening in recent ‘high Calanus’ years compared to ‘low Calanus’ years in the early 2000s.

在过去25年中（1995-2019年），沿着横跨西巴伦支海开口的海洋学剖面的四个站点，以季节性分辨率（每年5至6次）收集了鳍金枪鱼足足丰度和阶段组成的数据。这些气象站位于挪威沿海海流（NCC）中，有流入大西洋的水（两个气象站），并且位于熊岛以南的北极极地前线附近。这四个站的水柱中的平均坡足石的丰度从冬季的大约1000–10,000个人m ^-2的水平增加到夏季的30,000–100,000个人m ^-2的水平（最大670,000 m ^-2）。越冬（G0）人群主要由五足虫阶段5（CV）所占（40–70％），但在一月份CIV阶段（25–35％）所占比例也相对较高。在冬季，成年男性和女性的CV逐渐发展，平均丰度从1500到4000成年女性m ^-2分别在4月和5月在NCC和大西洋水域进行观测。新生代（G1）的幼足足在4月的NCC站和5月的大西洋水站出现了相对较高的丰度。数据显示了从南到北的后期发展梯度，既反映在越冬一代的成熟中，又反映在春季一代的发展中。根据与温度有关的发育时间的反算表明，在春季浮游植物生长的早期阶段，大西洋水站的峰值产于4月下旬至5月中旬，而NCC站的产卵高峰则早于一个月左右（3月）。 。春季一代是一个独特的队列，但数量之间存在较大的年际变化。在大西洋水域 8月足足发育阶段的组成与6月的情况相似，尽管稍稍先进一些。这被解释为反映了6月或7月初某个时候在上游产生的第二代（G2）的发展。6月的数据表明，只有G1队列中的一小部分发育成可生成并形成G2的成年动物。夏季的丰度有增加的趋势。大约在2005年之后，西南巴伦支海流入区域的C. finmarchicus。这可能与最近“高卡努斯”年的巴伦支海开放的东风应力相比，相比之下“巴兰斯”低年的风向更强。 2000年代初期。