Marine Biology

, Volume 107, Issue 3, pp 443–447 | Cite as

What is the sex ratio of harpacticoid copepods in the deep sea?

  • D. Thistle
  • J. E. Eckman


The sex ratios of deep-sea harpacticoids have been thought to be greatly skewed toward females. The representation of males is notably more equitable (approximately 1:2) at three deep-sea sites (San Diego Trough: 32°52.4′N, 117°45.5′W, 1 050 m, January 1987; Porcupine Seabight: 51°36.85′N, 12°57.30′W, 1 369 m, August 1984; northwest Atlantic, 40°27′N, 62°20′W, 4 820 m, July 1982, June 1983). This ratio conceals extensive variation at the species level. For some species, males are unknown. For other species, males are more numerous than females. Sampling bias against males can occur and may explain the more extreme reports of male rareness in the literature.


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Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • D. Thistle
    • 1
  • J. E. Eckman
    • 2
  1. 1.Department of OceanographyFlorida State UniversityTallahasseeUSA
  2. 2.Skidaway Institute of OceanographySavannahUSA

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