Shell Length is Used to Determine Juvenile Mussels

We examined the distribution of sizes (shell length) of individuals collected for each species.   Those individuals found in the lowest 5% of the size range were considered juveniles.

Species	Juvenile Size (mm)
Actinonaias ligamentina	17.30
Alasmidonta marginata	17.76
Amblema plicata	21.29
Cyclonaias tuberculata	24.61
Ellipsaria lineolata	18.42
Elliptio dilatata	28.08
Epioblasma triquetra	10.48
Fusconaia ebena	17.88
Fusconaia flava	20.18
Lampsilis cardium	15.27
Lampsilis higginsii	22.18
Lampsilis siliquoidea	21.66
Lasmigona complanata	14.54
Lasmigona compressa	63.15
Lasmigona costata	24.92
Leptodea fragilis	8.58
Ligumia recta	31.38
Megalonaias nervosa	No small individuals found
Obliquaria reflexa	17.43
Obovaria olivaria	30.04
Pleurobema sintoxia	16.34
Potamilus alatus	31.06
Potamilus ohioensis	No small individuals found
Pyganodon grandis	11.25
Quadrula fragosa	23.03
Quadrula metanevra	34.15
Quadrula pustulosa	17.07
Quadrula quadrula	19.19
Strophitus undulatus	22.51
Toxolasma parvus	13.24
Tritogonia verrucosa	31.04
Truncilla donaciformis	15.91
Truncilla truncata	16.72
Utterbackia imbecillis	10.90