Reproduction of Viviparus viviparus (Linnaeus, 1758) in the mid and lower sections of the Narew River

• Autorzy: Augustyniuk A. , Jakubik B.
• Języki publikacji: EN

Abstrakty

EN

The population of V. viviparus (L.) was studied at 16 sites situated along the mid and lower sections of the Narew River, with respect to the population density, sex ratio, size structure and fecundity. The density ranged from 50 to 600 indiv./m2. The females comprised 53–90% of population, and represented mainly the largest size classes (III and IV), while most of the males were of size class II. The smallest snails (class I) were found only among the males (up to 50%). In all the sites gravid females predominated, being the most abundant in size class IV (80%–100%). The average number of embryos per female was 18 (range 1–59) and increased with the shell height and body mass.

• Wydawca: -
• Czasopismo: Folia Malacologica
• Rocznik: 2002
• Tom: 10
• Numer: 2
• Opis fizyczny: p.85–90,fig.,ref.

Twórcy

autor

Augustyniuk A.

• Department of Agrocenology, Institute of Ecology, Polish Academy of Sciences, Konopnickiej 1, 05-092 Lomianki, Poland

autor

Jakubik B.

• Department of Ecology and Environment Protection, University of Podlasie, B.Prusa 12, 08-110 Siedlce, Poland

Uwagi

PL

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