- Tytuł:
- Life cycle and population dynamics of Discus rotundatus (O.F.Muller, 1774) (Gastropoda: Pulmonata: Endodontidae)
- Autorzy:
- Kuznik-Kowalska, E.
- Powiązania:
- https://bibliotekanauki.pl/articles/84171.pdf
- Data publikacji:
- 1999
- Wydawca:
- Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
- Opis:
- The following life history traits of D. rotundatus (O. F. Müll.) were established based on field and laboratory observations: fully calcified eggs ca 1 mm in diameter, of a size correlated with the number of parent’s whorls; 1–11 eggs per clutch; 1–178 eggs per lifetime, in 1–36 clutches; incubation period 14–36 days; egg cannibalism with a strong preference for conspecific eggs; quick growth (33–35 days per whorl) prior to maturity and slow growth in mature snails, resulting from energy expenditure for egg-laying; sexual maturity at 5.5 whorls (2nd–3rd year of life); life span 2.5–3.5 years. Isolated individuals produce fewer eggs of lower viability than individuals kept in groups, they lay their eggs later and at a larger size. Most eggs in the laboratory arelaid in June, in thefie ld themaximum of there productivepe riod falls in July/August.
- Źródło:
-
Folia Malacologica; 1999, 07, 1
1506-7629 - Pojawia się w:
- Folia Malacologica
- Dostawca treści:
- Biblioteka Nauki
Artykuł