| one publication added to basket [240824] | Comparative fecundity in three Danish mudsnails (Hydrobiidae)
In: Ophelia: International Journal of Marine Biology. Ophelia Publications: Helsingør. ISSN 0078-5326, more
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| Keywords |
Properties > Biological properties > Tolerance > Salinity tolerance
Properties > Physical properties > Thermodynamic properties > Temperature
Reproduction
Hydrobia neglecta Muus, 1963 [WoRMS]; Hydrobia ulvae (Pennant, 1777) [WoRMS]; Hydrobia ventrosa (Montagu, 1803) [WoRMS]; Hydrobiidae W. Stimpson, 1865 [WoRMS]
Marine/Coastal |
| 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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