Summary
The four species of Hydrobiid mudsnails found in Danish brackish water habitats are ranked with respect to reproductive effort. The biology of the species indicate that Hydrobia neglecta and Potamopyrgus jenkinsi, showing the highest reproductive effort are also more r-selected than the other species, H. ventrosa and H. ulvae.
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Lassen, H.H. Reproductive effort in Danish mudsnails (Hydrobiidae). Oecologia 40, 365–369 (1979). https://doi.org/10.1007/BF00345332
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DOI: https://doi.org/10.1007/BF00345332