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Marine Biology

, Volume 55, Issue 1, pp 63–68 | Cite as

Calanoid copepod eggs in sea-bottom muds. V. Seasonal changes in hatching of subitaneous and diapause eggs of Tortanus forcipatus

  • S. Kasahara
  • S. Uye
Article

Abstract

A warm-water neritic calanoid copepod, Tortanus forcipatus, has been found to lay two physiologically different types of eggs (subitaneous and diapause eggs), which are separately spawned in response to different seasonal environmental conditions. Subitaneous eggs are produced when the planktonic populations are at their numerical maxima, and are only shed until late summer. After peak spawning, true resting eggs are spawned which undergo diapause for 1 to 3 months. The eggs recover from their diapause around mid-winter, but hatching does not take place until the water temperature at the sea bottom exceeds 15°C in early summer.

Keywords

Water Temperature Seasonal Change Late Summer Early Summer Calanoid Copepod 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Literature Cited

  1. Anraku, M.: Seasonal distribution of pelagic copepods at Oshoro Bay, west coast of Hokkaido. Bull. Fac. Fish. Hokkaido Univ. 3, 187–192 (1953)Google Scholar
  2. Fish, C.J. and M. Johnson: The biology of the zooplankton population in the Bay of Fundy and Gulf of Maine with special reference to production and distribution. J. Fish. Res. Bd Can. 3, 189–322 (1937)Google Scholar
  3. Grice, D.G. and V.R. Gibson: Occurrence, viability and significance of resting eggs of the calanoid copepod Labidocera aestiva. Mar. Biol. 31, 335–337 (1975)Google Scholar
  4. ——: Resting eggs in Pontella meadi (Copepoda: Calanoida). J. Fish. Res. Bd Can. 34, 410–412 (1977)Google Scholar
  5. —: Resting eggs in the marine calanoid copepod, Labidocera aestiva Wheeler. Crustaceana 30, 9–12 (1976)Google Scholar
  6. Johnson, M.: The life history of the copepod Tortanus discaudatus (Thompson and Scott). Biol. Bull. mar. biol. Lab., Woods Hole 68, 182–200 (1934)Google Scholar
  7. —: Some observations on the hatching of Tortanus discaudatus eggs subjected to low temperatures. Limnol. Oceanogr. 12, 405–410 (1967)Google Scholar
  8. Kasahara, S., T. Onhé and M. Kamigaki: Calanoid copepod eggs in sea-bottom muds. III. Effects of temperature, salinity and other factors on the hatching of resting eggs of Tortanus forcipatus. Mar. Biol. 31, 31–35 (1975a)Google Scholar
  9. —: Calanoid copepod eggs in sea-bottom muds. Mar. Biol. 26, 167–171 (1974)Google Scholar
  10. ———: Calanoid copepod eggs in sea-bottom muds. II. Seasonal cycles of abundance in the populations of several species of copepods and their eggs in the Inland Sea of Japan. Mar. Biol. 31, 25–29 (1975b)Google Scholar
  11. McLaren, I.A.: Predicting development rate of copepod eggs. Biol. Bull. mar. biol. Lab., Woods Hole 131, 457–469 (1966)Google Scholar
  12. Rehman, F.U.: Observations on variation in a planktonic copepod, Tortanus forcipatus (Giesbrecht, 1889) from the inshore water of the Karachi coast, Pakistan. Crustaceana 25, 113–117 (1973)Google Scholar
  13. Sazhina, L.I.: On hibernating eggs of marine Calanoida. Zool. Zh. 47, 1554–1556 (1968)Google Scholar
  14. Uye, S. and A. Fleminger: Effect of various environmental factors on egg development of several species of Acartia in Southern California. Mar. Biol. 38, 253–262 (1976)Google Scholar
  15. Zillioux, F.J. and J.G. Gonzalez: Egg dormancy in a neritic calanoid copepod and its implications to overwintering in boreal waters. In: Fifth European Marine Biology Symposium, pp 217–230. Ed. by B. Battaglia. Padova, Italy: Piccin Editore 1972Google Scholar

Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • S. Kasahara
    • 1
  • S. Uye
    • 1
  1. 1.Faculty of Fisheries and Animal HusbandryHiroshima UniversityFukuyamaJapan

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