Page 9 - The Freshwater Mussels of Oklahoma

(or in some cases a salamander) host for a parasitic stage that lasts several weeks. There
are a few cases where development can occur without the parasitic stage but these are
exceptions. The glochidium encysts in the gills or fins of the host and utilizes nutrients
from its host to further develop its organ systems. This parasitic stage is also an
important dispersal mechanism for an animal with very limited locomotion. It insures
distribution into suitable habitats and also allows a mechanism for upstream migration.
Eventually, the glochidium will drop from its host (hopefully into a suitable substrate)
and begin its free-living existence. There are many strategies involved in attracting and
becoming attached to a host.

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