Marine Biology

, Volume 36, Issue 2, pp 151–157 | Cite as

Brood size and chemical composition of Pareuchaeta norvegica (Crustacea: Copepoda) in Loch Etive, Scotland

  • T. Nemoto
  • J. Mauchline
  • K. Kamada


Brood size and chemical composition (carbon, nitrogen, and ash) of Pareuchaeta norvegica in Loch Etive, Scotland have been determined. From 23 to 37 eggs were found in each egg mass (mean=30 eggs). The eggs are oval; the mean size of the longer axis is 438 μm. Variation in egg mass (as dry weight) is related to increase in dry weight of the maternal body. an increase of 1 mg in maternal body dry weight produces an increase of 0.03 mg dry weight in the egg mass. Carbon content increases with increasing body dry weight both in pre-spawning and spent females, but nitrogen content decreases with increasing body weight. Thus, the carbon:nitrogen ratio increases with increasing body dry weight. The carbon content of an egg mass ranges from 61.4 to 65.3%, and nitrogen content from 9.6 to 13.2% of the total dry weight. Some examples of partitioning of chemical components of the maternal body into the egg mass are also described.


Brood Size Maternal Body Nitrogen Ratio Body Carbon Genital Segment 
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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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • T. Nemoto
    • 1
  • J. Mauchline
    • 2
  • K. Kamada
    • 1
  1. 1.Ocean Research InstituteUniversity of TokyoTokyoJapan
  2. 2.Dunstaffnage Marine Research LaboratoryObanScotland

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