British Antarctic Survey, Natural Environment Research Council, High Cross, Cambridge, United Kingdom.
Adv Mar Biol. 2010;57:59-90. doi: 10.1016/B978-0-12-381308-4.00003-0.
This chapter reviews the short- and long-term changes in the size and age composition of Northern krill (Meganyctiphanes norvegica) populations and the environmental processes influencing those changes. It examines how populations of this species are affected by rates of reproductive output and mortality, and the effects of development, immigration and dispersion on population structure. This review also takes account of the many behavioural features that directly or indirectly influence M. norvegica population dynamics, such as swarming behaviour, diel vertical migration and diverse feeding strategies. What becomes evident is that M. norvegica shows a wide variability in population size-structure over the species extensive distributional range. Nevertheless, there are limits to this variability, as a result of the common life-cycle pattern.
本章回顾了北方磷虾（Meganyctiphanes norvegica）种群在大小和年龄组成方面的短期和长期变化，以及影响这些变化的环境过程。它研究了该物种的种群如何受到生殖输出和死亡率的影响，以及发育、移民和扩散对种群结构的影响。本综述还考虑了许多直接或间接影响 M. norvegica 种群动态的行为特征，例如群集行为、昼夜垂直迁移和多种摄食策略。显而易见的是，M. norvegica 在其广泛的分布范围内表现出种群大小结构的高度可变性。然而，由于共同的生命周期模式，这种可变性是有限的。
