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Biologia

, Volume 71, Issue 12, pp 1353–1360 | Cite as

Reproductive strategy in rock-dwelling snail Cochlodina orthostoma (Gastropoda: Pulmonata: Clausiliidae)

  • Anna Sulikowska-DrozdEmail author
  • Tomasz K. Maltz
Article
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Abstract

To analyse the reproductive activity of the central-European clausiliid Cochlodina orthostoma we sampled monthly 30 adults from three sites comprising old stone walls of two abandoned castles and isolated limestone rocks. Out of the 395 dissected snails, 25.1% retained eggs. The number of eggs in the uterus ranged from 2 to 12. The highest percentages of gravid individuals were recorded in June–July, but reproductive intensity varied among populations. Almost half of the recorded eggs contained a shelled embryo. The largest embryonic shell featured approximately 1.3 whorls. The reproductive mode of the species was also studied in laboratory culture. Egg-laying was observed between May and November, the number of eggs laid on a single occasion ranged from 1 to 8, and the number of eggs produced per individual varied between 6 and 21 during the observation period. We found that eggs were laid in various developmental stages, accordingly, there were differences in egg sizes and the external incubation period varied between 6 and 15 days. Based on our results C. orthostoma should be regarded as brooding species with a short and flexible period of egg retention.

Key words

land snails Alopiinae life history egg-retention brooding limestone rocks stone walls 

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Notes

Acknowledgements

We are thankful to Robert A.D. Cameron for helpful comments on the earlier draft of this paper.

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Copyright information

© Slovak Academy of Sciences 2016

Authors and Affiliations

  1. 1.Department of Invertebrate Zoology and HydrobiologyUniversity of ŁódźŁódźPoland
  2. 2.Museum of Natural HistoryUniversity of WrocławWrocławPoland

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