Ecology and Evolution of the Freshwater Mussels Unionoida
Wächtler, K. / Bauer, G.![Ecology and Evolution of the Freshwater Mussels Unionoida](https://support.digitalhusky.com/media/annotations/sorted/855/8559095/CHSBZCOP038559095.jpg)
Unionoida (naiads) are characterized by larvae which have to pass through a parasitic stage on a host fish. Some of these host-parasite systems are unique, since the generation time of the parasite exceeds that of its host by a factor of ten. There is tremendous life history variation. With a life span of more than 200 years, some naiad species belong to the longest-lived invertebrates, some are highly host-specific, some are extremely fertile...