Cookies Policy
X
Cookie Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Peculiarities of Immature Individuals Developing from Both Resting and Subitaneous Eggs of Polyphemus pediculus (Cladocera, Onychopoda)

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
MyBook is a cheap paperback edition of the original book and will be sold at uniform, low price.

Buy this article

Price:
$30.00+ Tax (if applicable)
Add to Favorites

image of Crustaceana

Juveniles of Polyphemus pediculus (Linnaeus, 1761) emerge into the aquatic environment from resting eggs at an earlier stage of development, compared to those that hatch from subitaneous eggs. They become sexually mature after five moults, while individuals originating from subitaneous eggs become mature after four moults. The numbers of moults under both circumstances are strictly stable. Morphometric characteristics, body length, and the ratio of the entire body and its parts change with every moult, but the intensity of these changes is different in individuals originating from different types of eggs. Newborns originating from resting eggs, are larger, but have less setae on antennae I-II and on the third endopodal segments of thoracic limbs I-III. Morphometrically they are closer to sexually mature individuals of Polyphemus exiguus Sars, 1897, than to immature individuals of P. pediculus originating from subitaneous eggs. Their morphometric correspondence to mature individuals of the freshwater form of their own species, P. pediculus is even less. As a consequence, the numbers of setae on the first segments of the endopodites of the thoracic limbs can not be used as a systematic character for the species of the genus Polyphemus.

Loading

Article metrics loading...

/content/journals/10.1163/156854011x607033
2011-12-01
2015-03-29

Affiliations: 1: Institution of RAS, I. D. Papanin Institute for Biology of Inland Waters, Borok, Nekouz district, Yaroslavl region 152742, Russia

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to email alerts
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Name:*
    Email:*
    Your details
    Name:*
    Email:*
    Department:*
    Why are you recommending this title?
    Select reason:
     
     
     
     
    Other:
     
    Crustaceana — Recommend this title to your library

    Thank you

    Your recommendation has been sent to your librarian.

  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation