Autor: Prockow, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: An anomaly of the reproductive organs in Trochulus hispidus (Linnaeus, 1758) (Gastropoda: Pulmonata: Hygromiidae)
Autorzy:: Prockow, M.
Kuznik-Kowalska, E.
Powiązania:: https://bibliotekanauki.pl/articles/83247.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:: anomaly
reproductive organ
Trochulus hispidus
Gastropoda
Pulmonata
Hygromiidae
land snail
snail
Opis:: A specimen of Trochulus hispidus from Buchenbach, Germany, had its male and female parts of thereproductive system completely separated. The female part lacked auxiliary organs. The male part opened into the genital atrium, but the vas deferens was blind-ended in a way precluding sperm transfer.
Źródło:: Folia Malacologica; 2012, 20, 1
1506-7629
Pojawia się w:: Folia Malacologica
Dostawca treści:: Biblioteka Nauki

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Tytuł:: On the population dynamics, reproductive biology and growth of Succinea putris (Linnaeus 1758) (Gastropoda:Pulmonata: Succineidae)
Autorzy:: Kuznik-Kowalska, E.
Pokryszko, B.M.
Prockow, M.
Oczkowska, M.
Powiązania:: https://bibliotekanauki.pl/articles/83348.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:: population dynamics
reproductive biology
animal growth
snail
terrestrial snail
Succinea putris
Gastropoda
Pulmonata
Succineidae
Opis:: Selected life-cycle and population parameters of a common Euro-Siberian wetland snail – Succinea putris (L.) – were studied in the field and in the laboratory. In the field the snails reproduced at least from April till September, with April–May and August–September peaks; only one such peak (April) was observed in the laboratory, though the snails reproduced throughout the year. The changes in population size structure in the field and the laboratory results (life span 210–420 days, mean 309) indicated semelparity. Growth in the laboratory included two phases: slow (November–March) and fast (June–October); which phase came first during the life cycle depended on the date of hatching. The growth rate in the field corresponded closely with the fast-phase growth in the laboratory. The smallest reproducing individual was slightly over 2.8 whorls; snails of 3.0 whorls were regularly observed to produce eggs (maximum number of whorls in adults: 4.0). Sexual maturity was attained in ca. 160 days. The eggs (non-calcified, translucent, spherical, 1.7–2.0 mm in diameter) were laid in batches, 5–64 per batch; the eggs within a batch were glued together. The batch dimensions were 3.5–25.7×2.2–24.7 mm. The time to lay a batch was 20–35 minutes. Forty-eight snails produced 74 batches within 12 months. The duration of the egg phase was 11–28 days, which might indicate egg retention of varied duration; hatching was asynchronous, spanning 1–12 days within a batch. The hatchlings had shells of 1.1–1.2 whorls; hatching success was 95%. Neither uniparental reproduction, nor egg or juvenile cannibalism were observed. When compared to data in the literature, our results imply that Succinea putris displays substantial local variation in life-cycle traits.We also provide an overview table to discuss similarities and adaptive radiation in the European succineid species.
Źródło:: Folia Malacologica; 2013, 21, 4
1506-7629
Pojawia się w:: Folia Malacologica
Dostawca treści:: Biblioteka Nauki

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