A seasonal study of the life cycle and reproductive biology of the copepod Calanus finmarchicus – the dominant zooplankton species and a key link between the lower and higher trophic levels within the southwestern Norwegian Sea - is presented. C. finmarchicus reproduces, feeds and accumulates lipids during spring and summer within surface waters, which enables it to survive overwintering at depth until the following spring. An inflow of warm and saline Atlantic Water (AW) enters from the southwest and meets the cold and less saline subarctic waters (SAW) flowing from the north and west. This confluence establishes the dynamic Iceland Faroe Front. The study includes seven cruises, conducted from July 2013 to July 2014. Ascent occurred earlier and over a prolonged period in AW compared to the SAW. The peak egg production per capita occurred in April (43 eggs female⁻¹ d⁻¹) and May (13 eggs female⁻¹ d⁻¹) in SAW and AW, respectively. The higher productivity in SAW can be explained by larger female size, increased lipid content and better feeding conditions. The increased egg production rates in May in AW were not reflected in an increased abundance of young copepodite stages in June, potentially due to a decoupling between early ascent and the late onset of the bloom. Descent, largely comprised by the pre-adult stages, to overwintering depths was already initiated in June in both regions. This coincides with increased lipid content, being significantly higher at depth compared to the surface in late summer. A smaller portion of individuals remained within the upper layers to spawn a second generation in August in both regions, increasing the abundance and biomass. The reproductive phenology and stage development of C. finmarchicus likely influence feeding and competition between herring and mackerel and the duration of their stay in Faroese waters.

提出了对pe足类螯鱼（Calanus finmarchicus）的生命周期和生殖生物学的季节性研究-浮游动物的主要种类，也是挪威西南海域营养水平较低和较高之间的关键联系。芬氏梭菌在春季和夏季，在地表水中繁殖，喂养和积累脂质，使其能够在深层越冬之前生存直到下一个春天。温暖和咸的大西洋水（AW）从西南流入，并与从北部和西部流出的冷且盐分较少的北极亚水（SAW）汇合。这种汇合建立了充满活力的冰岛法罗战线。该研究包括从2013年7月至2014年7月进行的7次巡游。与SAW相比，AW的上升时间更早且持续时间更长。人均产蛋高峰出现在4月（雌性^-1 d ^-1的43个卵）和5月（雌性^-1 d ^-1的13个卵）。）分别显示在SAW和AW中。SAW的较高生产率可以用更大的雌性体型，增加的脂质含量和更好的喂养条件来解释。五月份AW产蛋率的提高并未反映在六月的幼小角足类幼虫期的增加，这可能是由于早期上升与开花后期延迟之间的脱钩所致。在两个地区，已经开始由成年前阶段构成的越冬深度下降。这与增加的脂质含量相吻合，与夏末的表面相比，其深度明显更高。一小部分个体保留在上层，以在两个地区于八月产卵第二代，从而增加了丰度和生物量。中华绒螯蟹的生殖物候与阶段发育。C. finmarchicus可能影响鲱鱼和鲭鱼之间的觅食和竞争以及它们在法罗群岛水域的停留时间。