Observations on the breeding habits of Opeas gracile (Hutton) (Gastropoda: Subulinidae)

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SWAPAN KUMAR BISWAS
REZAUR RAHMAN
TRIDIB RANJAN MITRA
(1976)
Volume
29
Part
2
Page from
69

In the field Opeas gracile aestivates for half the year, becomes active a few days before the monsoon rains, feeds for two days and then mates and deposits eggs. In the laboratory individuals do not aestivate and produce more than one clutch of 1—14 eggs per year. Freshly hatched young reared in isolation matured in as little as 13 weeks and produced viable eggs which hatched after 10 days.