Vol. 57, 2018
(update: 2018.07.18; 08.02)
High Fecundity, Rapid Development and Selfing Ability in Three Species of Viviparous Land Snails Phaedusinae (Gastropoda: Stylommatophora: Clausiliidae) from East Asia
Anna Sulikowska-Drozd1,*, Takahiro Hirano2, Shu-Ping Wu3, and Barna Páll-Gergely4
of Invertebrate Zoology and Hydrobiology, Faculty of Biology and
Environmental Protection, University of Lodz, Banacha 12/16, 90-237
(Received 13 March 2018; Accepted 1 July
2018; Communicated by Benny K.K. Chan)
Sulikowska-Drozd, Takahiro Hirano, Shu-Ping Wu, and Barna Páll-Gergely
history traits are important yet understudied aspects of ecological
diversification in land snail faunas. To acquire information for
comparative analysis of gastropod life cycles, we conducted
experimental breeding of three viviparous clausiliids from Japan and
Taiwan. Under laboratory conditions, Tauphaedusa
sheridani (Pfeiffer, 1866), T.
tau (O. Boettger, 1877) and Stereophaedusa
(Pilsbry, 1902) featured similar times to complete shell growth (12-16
weeks), age of first reproduction (23-24 weeks) and annual fecundity
(143-173 neonates per pair of snails). The maximum number of eggs
retained in genital tract reaches nine for T. sheridani, 11 for T. tau, and seven for S. jacobiana. The ratio between
average shell height of neonate and adult varied between 13.5% for T. tau, 13.9% for T. sheridani, and 16.7% for S. jacobiana.
All species were able to self-fertilize. Exposure to long drought
affects intrauterine embryo development in all species; additionally,
it results in parent and embryo mortality in S. jacobiana.
Observed differences in the structure of the egg envelope among studied
species point to greater than expected differentiation of developmental
processes in viviparous Phaedusinae of East Asia.
Key words: Land snail,
Reproduction, Viviparity, Parental care, Life history.