Non-consumptive mortality in copepods: occurrence of Calanus spp. carcasses in the Arctic Ocean during winter

摘要: During a research cruise to the Arctic Ocean in January 2012, we observed high occurrence of carcasses Calanus spp. We analysed live samples separate living from dead individuals. In Rijpfjorden, an fjord north-eastern Svalbard, 9–14% population were be dead. At Sofiadjupet, oceanic basin located at 81.4N southern edge Ocean, 94% depth (between 300 and 2000 m) This is first estimation contribution copepod populations. Lipid sacs preserved part lipid sac area was significantly smaller than discuss possible causes for mortality, its implication dynamics energy transfer review previous accounts non-predatory mortality marine copepods. our case, partial consumption by predators death after reproduction are unlikely thus other stressors (starvation, environmental conditions, parasitic or viral infection) may responsible. Our analysis shows that have poor understanding factors predation causing