Annales Zoologici, vol. 58, no 4
Polska Akademia Nauk. Muzeum i Instytut Zoologii ; Fundacja "Natura optima dux"
Bibliogr. p. 879-880 ; P. 857-880 : ill. ; 27 cm ; Taxa in Latin
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.
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
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Museum and Institute of Zoology of the Polish Academy of Sciences
Library of the Museum and Institute of Zoology of the Polish Academy of Sciences
Programme Innovative Economy, 2010-2014, Priority Axis 2. R&D infrastructure ; European Union. European Regional Development Fund
Oct 2, 2020
May 5, 2016
36
https://rcin.org.pl./publication/55796
Edition name | Date |
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Life cycles of clausiliids of Poland - knowns and unknowns / Maltz, Tomasz K. ; Sulikowska-Drozd, Anna | Oct 2, 2020 |
Korniushin, Alexei V.
Norris, M. L. Adams, C. E.
Poliński, Władysław Karol Aleksander (1885–1930)
Poliński, Władysław Karol Aleksander (1885–1930)
Poliński, Władysław Karol Aleksander (1885–1930)
Ermilov, Sergej Gennad'evič Łochyńska, Małgorzata Olszanowski, Ziemowit
Korniushin, Alexei V.
Brooks, J. E. Htun, P. T.