The effect of food on the determination of sex ratio in Calanus spp.: Evidence from experimental studies and field data
Date of Original Version
The effect of food concentration on the sex ratio in Calanus spp. has been investigated in laboratory and mesocosm experiments. The results of the experiments are compared with time series in the field and with physiological rates. The food concentration and quality had an effect on the sex ratio of adult Calanus, with higher percentages of males obtained with increased food concentration. Laboratory experiments and field time series suggest that sex can still change at stage CIII-CIV, but is determined at stage CV. The energy budget of males was very unbalanced, suggesting that the shorter lifespan often reported could be due to exhaustion of lipid stores.
Publication Title, e.g., Journal
ICES Journal of Marine Science
Irigoien, X., B. Obermüller, R. N. Head, R. P. Harris, C. Rey, B. W. Hansen, B. H. Hygum, M. R. Heath, and E. G. Durbin. "The effect of food on the determination of sex ratio in Calanus spp.: Evidence from experimental studies and field data." ICES Journal of Marine Science 57, 6 (2000). doi: 10.1006/jmsc.2000.0960.