...Tomasz Antkowiak; Ronald Chase SUMMARY Because oviposition in the land snail Helix aspersa is a metabolically expensive process coupled to a high fixed cost, one expects oviposition to occur only when the clutch size surpasses a minimum value at which the reproductive benefit exceeds the cost. We...

...G. S. Bewick; D. A. Price; G. A. Cottrell ABSTRACT The C3 neurone of Helix aspersa is known to induce contraction of the ipsilateral tentacle retractor muscle. It is immunoreactive for peptides of the FMRFamide series and immunoreactive FMRFamide nerve fibres occur in the muscle. Here we found...