OBSERVATIONS ON KEEPING OF ADULT FEMALE PSEUDOCALANUS ELONGATUS UNDER LABORATORY CONDITIONS

Stocks of adult female Pseudocalanus elongatus have been kept for the past 6 years in a laboratory remote from the sea. The techniques used in maintaining these stocks are described. The most suitable temperature for keeping the copepods has been found to be 10 °C. The control of pH has not been necessary. Although an allowance of 30 ml. of sea water for each copepod is recommended, it has been found that survival is not affected by densities of up to 1 copepod/10 ml. © 1968, Marine Biological Association of the United Kingdom. All rights reserved.