Marine Biology

, Volume 31, Issue 1, pp 31–35 | Cite as

Calanoid copepod eggs in sea-bottom muds. III. Effects of temperature, salinity and other factors on the hatching of resting eggs of Tortanus forcipatus

  • S. Kasahara
  • T. Onbé
  • M. Kamigaki
Article

Abstract

The “resting” eggs of a marine neritic copepod, Tortanus forcipatus Giesbrecht, recovered from sea-bottom sediment were hatched in the laboratory. Hatching occurred at temperatures of 13° to 30°C, no eggs hatched at 10°C. Temperatures around 25°C were found to be optimal for hatching, although the range of optimal temperatures for hatching was approximately 5°C lower in eggs stored for 14 to 15 months than in those stored for 1 to 2 months. A wide range of salinity, from 18 to 54%S, was favourable for hachting. Eggs failed to hatch within the sediment mud, which suggests that they are in a state of dormancy in the mud. Hatching was successful under both light and dark conditions.

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Literature Cited

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Copyright information

© Springer-Verlag 1975

Authors and Affiliations

  • S. Kasahara
    • 1
  • T. Onbé
    • 1
  • M. Kamigaki
    • 1
  1. 1.Faculty of Fisheries and Animal HusbandryHiroshima UniversityFukuyamaJapan

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