Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 21 - 80
Comments: Recent mussel status surveys found that the populations of the fuzzy pigtoe (represented by live animals and shell material) have declined from: 31 historic sites to 18 currently active sites, 8 inactive, and 5 undetermined population status within the Escambia River drainage; 4 historic sites to 0 currently active sites within the Yellow River drainage; and 51 historic sites to 40 currently active sites, 7 inactive sites. In totality, the fuzzy pigtoe has declined from a total of 86 historic sites to its remaining distribution of 58 sites. It has been extirpated from approximately 22% of its historic range. Only 4 populations were represented by 10 - 20 individuals, but most supported only 1 or 2 individuals (Williams et al., 2000; Blalock-Herod et al., 2005). At least some of the extant populations may be capable of reproducing, as one specimen was found with eggs partially in swollen marsupia during July (Williams et al. in review). Low-level recruitment may be occurring; however, long-term viability of the fuzzy pigtoe is questionable (see USFWS, 2003). Blalock-Herod et al. (2005) listed this species from 21 historical sites in the Choctawhatchee River drainage, relocated it at 6 and found it at 34 new sites scattered in the upper and lower portions of the river in Alabama and Florida. Pilarczyk et al. (2006) recorded recent collections (in 2004) of this species following surveys of 24 sites at 11 sites including West Fork Choctawhatchee River, Eightmile Creek (just over the border in Florida), Patsaliga Creek, Pea River, Pea Creek, East Fork Choctawhatchee River, and Murder Creek compared to Murder Creek, Bottle Creek, West Fork Choctawhatchee River, Patsaliga Creek, Pigeon Creek, Jordan Creek, Little Patsaliga Creek, Flat River, Eightmile Creek (Florida), Pea River, Pea Creek, Judy Creek, and Hurricane Creek in surveys of the same sites in the 1990s. White et al. (2008) utilized specimens from Eightmile Creek in Walton Co., Florida for host suitability studies. Gangloff and Hartfield (2009) found it abundantly in 5 Pea River sites and 1 Choctawhatchee River sites, Alabama.
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