The effect of food on the determination of sex ratio in Calanus spp. Evidence from experimental studies and field data

Xabier Irigoyen*, B. Obermüller, R. N. Head, R. P. Harris, C. Rey, B. W. Hansen, B. H. Hygum, M. R. Heath, E. G. Durbin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)1752-1763
Number of pages12
JournalICES Journal of Marine Science
Volume57
Issue number6
DOIs
StatePublished - Jan 1 2000

Keywords

  • Calanus spp.
  • Copepods
  • Sex ratio

ASJC Scopus subject areas

  • Oceanography
  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology

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