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The Effect of Drought On Egg Production in Cepaea Nemoralis (L.)

The Effect of Drought On Egg Production in Cepaea Nemoralis (L.) THE EFFECT OF DROUGHT ON EGG PRODUCTION IN CEPAEA NEMORALIS (L.). by H. WOLDA (Zoological Laboratory, University of Groningen, Haren (Gr.) The Netherlands) INTRODUCTION Observations on egg production in Cepaea under natural climatic cir- cumstances (WOLDA, 1963) led to the impression that in summers with a high frequency of warm dry periods oviposition frequency was rel- atively high and that the clutches produced were rather large. Ex- periments in the laboratory (WOLDA, 1965) have shown that oviposition frequency is correlated positively with temperature so that this could provide part of the explanation of the suggested influence of warm dry weather. The suggested effect of warm dry weather on clutch size, however, cannot be explained as an influence of temperature as tem- perature had only a small effect, if any, on clutch size (WOLDA, 1965). The effect on egg production of others factors associated with periods of warm dry weather should, therefore, be tested. Drought is one of the factors worth testing, inhibition of egg-laying being another as during dry weather usually no eggs are produced and it seems possible that this prevention from laying eggs per se has an effect. WAGNER and WONG ( 1957) found an overabundance http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives Néerlandaises de Zoologie (in 1967 continued as Netherlands Journal of Zoology) Brill

The Effect of Drought On Egg Production in Cepaea Nemoralis (L.)

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Publisher
Brill
Copyright
© 1964 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0365-5164
eISSN
1875-3019
DOI
10.1163/036551665X00058
Publisher site
See Article on Publisher Site

Abstract

THE EFFECT OF DROUGHT ON EGG PRODUCTION IN CEPAEA NEMORALIS (L.). by H. WOLDA (Zoological Laboratory, University of Groningen, Haren (Gr.) The Netherlands) INTRODUCTION Observations on egg production in Cepaea under natural climatic cir- cumstances (WOLDA, 1963) led to the impression that in summers with a high frequency of warm dry periods oviposition frequency was rel- atively high and that the clutches produced were rather large. Ex- periments in the laboratory (WOLDA, 1965) have shown that oviposition frequency is correlated positively with temperature so that this could provide part of the explanation of the suggested influence of warm dry weather. The suggested effect of warm dry weather on clutch size, however, cannot be explained as an influence of temperature as tem- perature had only a small effect, if any, on clutch size (WOLDA, 1965). The effect on egg production of others factors associated with periods of warm dry weather should, therefore, be tested. Drought is one of the factors worth testing, inhibition of egg-laying being another as during dry weather usually no eggs are produced and it seems possible that this prevention from laying eggs per se has an effect. WAGNER and WONG ( 1957) found an overabundance

Journal

Archives Néerlandaises de Zoologie (in 1967 continued as Netherlands Journal of Zoology)Brill

Published: Jan 1, 1964

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