Blue River Mussel Survey Completed

Mussel Survey Recap

Four more species were found than what was discovered in 2003; total of eighteen species in 2008.

Young mussels found in eight species.

Freshwater mussels act as indicator of water quality in Blue River; the fact that more species were found is a plus.

Just Remember...

All mussels are protected so it is illegal to possess living mussels or their shells.

A significant Blue River mussel bed was surveyed this fall to quantify how abundant mussel species are and how much juvenile recruitment is occurring. Despite the chilly water temperatures, 61° F, with wetsuits and hoods the team of volunteers took advantage of the low water level and set to work. The results were thrilling with 18 live species found, up from 14 species in 2003. A list of these species is shown in the table below. Young mussels were found for eight of these species, which are denoted by an asterisk. Of particular interest was the discovery of live slippershell and fawnsfoot mussels.

The diversity of this particular mussel bed is explained by the immediate habitat, which is upstream of a riffle and has a stable bottom of sand and small cobble, the perfect combination in which mussels prefer to burrow. Additionally, this site is close enough to the Ohio River to attract large river fish that happen to shed mussel larvae of big river mussels, such as the black sandshell, elephantear, and washboard. Medium-river mussels, like the wavy-rayed lampmussel and pink heelsplitter, intermingle with the large river species to create a unique community of mussels in Blue River.

Freshwater mussels are an indicator of long term trends in water quality. By establishing a permanent sampling site for mussels on Blue River, we can monitor changes in water quality within the watershed. Additionally, we can keep tabs on the mussel species that may need a boost.

Freshwater Mussels of Blue River

* distinguishes species exhibiting young mussels in the Blue River

Nature picture credits (top to bottom, left to right): Photo © TNC (slippershell; volunteer; mussels found during survey).