Abstract A mechanism is demonstrated that could explain large-scale aggregations of lipid-rich copepods in the surface waters of marine environments. Laboratory experiments establish that changes in salinity and temperature induce lipid-mediated buoyancy instability that entrains copepods in surface waters. Reduced hydrostatic pressure associated with forced ascent of copepods at fjordic sills, shelf breaks and seamounts would also reduce the density of the lipid reserves, forcing copepods and particularly those in diapause to the surface. We propose that salinity, temperature and hydrodynamics of the physical environment, in conjunction with the biophysical properties of lipids, explain periodic high abundances of lipid-rich copepods in surface waters.

中文翻译：

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桡足类Calanus finmarchicus失去浮力控制

摘要 证明了一种机制可以解释海洋环境表层水中富含脂质的桡足类动物的大规模聚集。实验室实验表明，盐度和温度的变化会导致脂质介导的浮力不稳定，从而导致地表水中的桡足类动物。与峡湾、陆架断裂和海山的桡足类强迫上升相关的静水压力降低也会降低脂质储备的密度，迫使桡足类，特别是滞育的桡足类浮出水面。我们提出，物理环境的盐度、温度和流体动力学，结合脂质的生物物理特性，可以解释地表水中富含脂质的桡足类的周期性高丰度。