While protein and lipid accumulation and reduced metabolism are also reported for Neocalanus and Eucalanus species which are dominant in the subarctic North Pacific Ocean , these indicators are not crucial for identifying copepod dormancy. For the past three decades, biochemical materials like nucleic acids and proteins have been used to evaluate physiological conditions of copepods. Ota and Landry proposed nucleic acids as growth rate indicators for C. pacificus. Wagner et al. also proposed the RNA:DNA ratio as an indicator of nutritional condition for C. finmarchicus. Since Miller et al. suggest that dormant copepods stop feeding and growth, the ratio of nucleic acid might be an easy and quick method for identifying their dormant condition.