Subtitle:

Annales Zoologici, vol. 58, no 4

Contributor:

Polska Akademia Nauk. Muzeum i Instytut Zoologii ; Fundacja "Natura optima dux"

Publisher:

Natura optima dux Foundation

Place of publishing:

Warszawa

Description:

Bibliogr. p. 879-880 ; P. 857-880 : ill. ; 27 cm ; Taxa in Latin

Type of object:

Journal/Article

Abstract:

Among the 24 native clausiliids, 15 were subject to laboratory observations.Eleven of them were found to be oviparous, three – egg retainers and one – ovoviviparous. Batches, containing most often one to about a dozen of partly calcified, ellipsoidal orspherical eggs, appeared usually in the spring and autumn (in non-hibernating individualsthroughout the year). Probably the main factors determining the onset of reproduction arehumidity and temperature while the photoperiod has no significant effect. The incubation period is ca. two weeks (room temperature), the hatching is synchronous or asynchronous. Cases of intra-batch and inter-batch cannibalism were observed. The minimum time fromhatching/birth till adult size is ca. 3–9 months and after further 5–8 months the snails start producing eggs/babies. Clausiliids are iteroparous. Anatomical studies on the developmentof the reproductive system show that just before lip completion the reproductive system is still in completely developed. Penis, epiphallus and spermatheca develop within the firstmonth after growth completion (which would indicate attainment of ability to copulate), andthe reproductive system becomes wholly mature only after a few months. The clausiliid development strategy is probably the following: the quickest possible growth and attainment of adult size, then development of the reproductive system and attainment of sexual maturity.

Relation:

Annales Zoologici

Volume:

58

Issue:

4

Start page:

857

End page:

880

Detailed Resource Type:

Article : original article

Format:

application/pdf

Resource Identifier:

oai:rcin.org.pl:58706

Source:

MiIZ PAN, call no. P.255, vol 58, no 4 ; MiIZ PAN, call no. P.4314, vol 58, no 4 ; click here to follow the link

Language:

eng

Language of abstract:

eng

Rights:

Rights Reserved - Restricted Access

Terms of use:

Copyright-protected material. Access only on terminals at the Museum and Institute of Zoology of the Polish Academy of Sciences, may be used within the limits of statutory user freedoms.

Digitizing institution:

Museum and Institute of Zoology of the Polish Academy of Sciences

Original in:

Library of the Museum and Institute of Zoology of the Polish Academy of Sciences

Projects co-financed by:

Programme Innovative Economy, 2010-2014, Priority Axis 2. R&D infrastructure ; European Union. European Regional Development Fund

Access:

Closed