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Comparative fecundity in three Danish mudsnails (Hydrobiidae)
Lassen, H.H.; Clark, M.E. (1979). Comparative fecundity in three Danish mudsnails (Hydrobiidae). Ophelia 18(2): 171-178. hdl.handle.net/10.1080/00785326.1979.10425497
In: Ophelia: International Journal of Marine Biology. Ophelia Publications: Helsingør. ISSN 0078-5326, more
Peer reviewed article  

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Keywords
    Reproduction; Salinity tolerance; Temperature; Hydrobia neglecta Muus, 1963 [WoRMS]; Hydrobia ulvae (Pennant, 1777) [WoRMS]; Hydrobia ventrosa (Montagu, 1803) [WoRMS]; Hydrobiidae Stimpson, 1865 [WoRMS]; Marine

Authors  Top 
  • Lassen, H.H.
  • Clark, M.E.

Abstract
    The reproduction of three species of mud snails, Hydrobia neglecta, H. ulvae and H. ventrosa is studied under constant conditions of various temperature/salinity combinations and in seven field populations. Under otherwise constant conditions the egg production of H. neglecta increases with temperature (4-24°C), while it decreases in H. ulvae and H. ventrosa. All species show a general peak in reproductive activity around 20 ‰ salinity. In H. neglecta egg production is retarded at low salinity, which may explain the absence of the species in the inner Baltic Sea. All natural populations exhibit peak reproductive activity during May-June, and total numbers of eggs compare well with the values obtained under constant conditions.

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