Cookies 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

Ecology of Some Experimental Populations of the Landsnail Cepaea Nemoralis (L.). Ii. Production and Survival of Eggs and Juveniles

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.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Netherlands Journal of Zoology
For more content, see Archives Néerlandaises de Zoologie (Vol 1-17) and Animal Biology (Vol 53 and onwards).

Oviposition in Cepaea nemoralis occurs mainly from the end of May until the beginning of August, but there is a second peak, probably small, in egg production in October. Most of the eggs produced in late autumn die, but some survive during the winter and produce juveniles. During the summer the number of clutches produced per snail was 2.4 and mean clutch size was 72 eggs. It is suggested that some substance, possibly digestible protein and carbohydrates in the food is limiting clutch size, that the seasonal decrease in clutch size is caused by a decreasing concentration of that substance in the food and that larger snails produce larger clutches because they eat more. A comparison is made between a population which was rapidly increasing in size and one that declined. In the former egg production per snail was more than twice that in the latter and egg survival 25% better so that production of juveniles was 3 times larger. In the former some 25% of the snails that became adult did so in their first year while in the latter nu such fast growers have been observed. However, survival of juveniles in their first year in the expanding population was 20 times better. This suggests that survival of small juveniles is the key factor in the dynamics of populations of Cepaea. It is suggested that drought as well as predation by shrews, toads and frogs are the major factors affecting juvenile survival. It is argued that there may be some density governing processes acting but that their influence in population size is almost negligible.

Affiliations: 1: zoological Laboratory, University of Groningen, Haren (Gn.), The Netherlands


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Netherlands Journal of Zoology — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation