- Tytuł:
- Reproduction of Balea (Pseudalinda) fallax (Rossmassler, 1836) (Gastropoda: Pulmonata: Clausiliidae) kept under laboratory conditions
- Autorzy:
-
Sulikowska-Drozd, A.
Maltz, T.K. - Powiązania:
- https://bibliotekanauki.pl/articles/83849.pdf
- Data publikacji:
- 2012
- Wydawca:
- Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
- Tematy:
-
animal reproduction
Balea fallax
Gastropoda
Pulmonata
Clausiliidae
laboratory condition
land snail
snail
life history
uniparental reproduction - Opis:
- 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.
- Źródło:
-
Folia Malacologica; 2012, 20, 1
1506-7629 - Pojawia się w:
- Folia Malacologica
- Dostawca treści:
- Biblioteka Nauki
Artykuł