In August the mussels release spat, known as glochidia
, which latch on to the gills of the trout in the tank and stay there over winter until they drop off during the following spring.
(larvae) of freshwater mussels are obligate parasites on the gills or fins of fish, and identification of natural host species is critical to successful conservation of freshwater mussels, especially for threatened and endangered species such as Q.
The 24-h CF LC50 estimates for glochidia
of multiple species vary widely, ranging from 113 to 3,257 mg/L (Bringolf et al.
It seems unlikely that fish with glochidia
(the parasitic larvae of mussels) will be able to move upstream of the lowhead dam (Watters 1996), and so recruitment of new species from downstream will be limited, or that fish with glochidia
will emerge from outflow of water from Hoover Reservoir, since the reservoir does not support a riverine fauna of mussels.
Sensitivity of the glochidia
(larvae) of freshwater mussels to copper: assessing the effect of water hardness and dissolved organic carbon on the sensitivity of endangered species.
Descriptions of some of the glochidia
of the Unionidae (Mollusca: Bivalvia).
Freshwater mussels have larvae termed glochidia
that are obligate ectoparasites of fish (Dillon 2000).
It survives only in a single, small and isolated population in Indian Creek, a tributary to the Clinch River, and biologists racing to save it from extinction were thrilled to discover that not only were the golden riffleshell they had found all female, they were also carrying glochidia
, which is what immature, young mussels are called.
Site selection and attachment duration of Anodonta woodiana (Lea, 1934) (Bivalvia: Unionacea) glochidia
on fish hosts.
(larvae) form within four to six weeks.
purpuratus obvious sexual dimorphism occurs in shell shape, and we were able to construct an age curve for both males and females, since females have a truncated posterior portion of the shell because of brooding glochidia
Released from the gills of an adult mussel into the water no bigger than grains of sand, the glochidia
require a host for the several weeks it takes them to metamorphose into tiny mussels able to live on their own.