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Vol. 61, 2022
(update: 2022.5.10)
Different Dynamics of
Reproductive Cell Development in Oviparous Clausilia bidentata and
Ovoviviparous Ruthenica filograna
Snails
Krystyna Szybiak1, Elżbieta Gabała2, and Zbigniew Adamski3,4,*
doi:10.6620/ZS.2022.61-10
1Department
of General Zoology, Faculty of Biology, Adam Mickiewicz University in
Poznań, ul. Umultowska 89, 61-614 Poznań, Poland. E-mail:
szybiak@amu.edu.pl (Szybiak)
2Institute of Plant
Protection - National Research Institute, ul. Władysława Węgorka 20,
60-318 Poznań, Poland. E-mail: elzbietagabala@gmail.com (Gabała)
3Department of Animal Physiology and Developmental
Biology, Faculty of Biology, Adam Mickiewicz University in Poznań, ul.
Umultowska 89, 61-614 Poznań, Poland.
4Laboratory of Electron and Confocal Microscopy,
Faculty of Biology, Adam Mickiewicz University in Poznań, ul.
Umultowska 89, 61-614 Poznań, Poland. *Correspondence:
zbigniew.adamski@amu.edu.pl (Adamski)
Received 22 May 2021 / Accepted 4
February 2022
Communicated by Benny K.K. Chan
Most
terrestrial snails are oviparous and only some are ovoviviparous. The
physiology of the reproductive system and its activity in these two
groups have received little attention. We compared the month-to-month
dynamics of reproductive cell formation between two species of
Clausiliidae snails: Ruthenica
filograna (an ovoviviparous species) and Clausilia bidentata
(an oviparous species). Our aim was to test the hypothesis that the
seasonal activity of gametogenesis is determined by reproductive
strategy (oviparity / ovoviviparity). The results showed that the
frequency and number of reproductive cells in different stages varied
month-to-month, within each species, and between the two species. Ruthenica filograna maintained its
reproductive activity throughout the entire observation period, whereas
the gonadal activity of C. bidentata
changed with the seasons (it was temperature dependent). Our results
are in tune with the hypothesis of Baur, that ovovivipary has some
advantage over oviparity under harsher environmental conditions.
Key words: Snails, Oviparity,
Ovoviviparity, Evolutionary advantage, Reproductive cells.
Citation: Szybiak K, Gabała E, Adamski Z.
2022. Different dynamics of reproductive cell development in oviparous Clausilia bidentata and
ovoviviparous Ruthenica filograna snails. Zool Stud 61:14. doi:10.6620/ZS.2022.61-14.
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