Reproduction of Balea (Pseudalinda) fallax (Rossmassler, 1836) (Gastropoda: Pulmonata: Clausiliidae) kept under laboratory conditions

• Autorzy: Sulikowska-Drozd A. , Maltz T. K.
• Języki publikacji: EN

Abstrakty

EN

Balea fallax (Rossm.) collected from the Roztocze Upland (SE. Poland) was kept in the laboratory for four years. Observations were conducted between March and October when the snails were kept at room temperature (18-25°C); in winter they were stored at 3°C. The egg-laying period started in late March and lasted till October, with maxima in spring and early autumn. The snails laid oval, gelatinous eggs with separatecalcium carbonate crystals in the external envelope (average egg size 1.96 × 1.73 mm). The eggs were deposited in batches (up to 14 eggs at a time) or singly. The number of batches per snail per year ranged between 1and 4. Snails isolated before maturation laid defective eggs which failed to develop, which suggest that the speciesis incapable of uniparental reproduction or at least the ability is very limited. The reproduction rate decreased during consecutive years, probably as a result of the aging or the shortage of allosperm in isolated individuals.Compared to batches of typically oviparous clausiliids, eggs of B. fallax hatched slightly earlier (interval between oviposition and hatching lasted 8-10 days at room temperature). It is likely that the adults retained developing eggs in the uterus for a short time. The juveniles needed at least 6 months to attain the ultimates hell size.

Słowa kluczowe

EN

animal reproduction; Balea fallax; Gastropoda; Pulmonata; Clausiliidae; laboratory condition; land snail; snail; life history; uniparental reproduction

• Wydawca: -
• Czasopismo: Folia Malacologica
• Rocznik: 2012
• Tom: 20
• Numer: 1
• Opis fizyczny: p.27-34,fig.,ref.

Twórcy

autor

Sulikowska-Drozd A.

• Department of Invertebrate Zoology and Hydrobiology, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland

autor

Maltz T. K.

• Museum of Natural History, Wroclaw University, Sienkiewicza 21, 50-335 Wroclaw, Poland

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