Similar nucleus numbers among copepods

First nauplius stages (NI) of Pseudocalanus sp., Eurytemora herdmani, Calanus finmarchicus, and C. hyperboreas all have on average about 2000 nuclei. First copepodid stages (CI) of Acartia hudsonica, Pseudocalanus sp., E. herdmani, C. finmarchicus and C. glacialis have about 9600–13 000 nuclei. Body...

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Bibliographic Details
Published in:Canadian Journal of Zoology
Main Authors: McLaren, I. A., Marcogliese, D. J.
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1983
Subjects:
Calanus finmarchicus
Copepods
Online Access:http://dx.doi.org/10.1139/z83-095
http://www.nrcresearchpress.com/doi/pdf/10.1139/z83-095
Description
Summary:First nauplius stages (NI) of Pseudocalanus sp., Eurytemora herdmani, Calanus finmarchicus, and C. hyperboreas all have on average about 2000 nuclei. First copepodid stages (CI) of Acartia hudsonica, Pseudocalanus sp., E. herdmani, C. finmarchicus and C. glacialis have about 9600–13 000 nuclei. Body volumes among the same species differ ca. 8-fold in NI and 30-fold in CI. Larger species have much larger nuclei, but close correspondence of body size to nucleus size (amount of DNA) may only occur among closely related species. Nucleocytoplasmic ratios must also vary seasonally within species.

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