Invasion
Invasion Description
1st Records: Guana-Tomalato Matanzas National Estuarine Research Reserve/FL/Matanzas River Estuary (2004-2012, Eash-Loucks et al. 2014, on E. d.
Geographic Extent
FL/Camachee Cove Harbour (2005, Kruse and Hare 2007, E. d.); FL/San Sebastian River (2005, Kruse and Hare 2007, E. d.); Whitney Lab/FL (2005, Kruse and Hare 2007, E. d.); Guana-Tomalato Matanzas National Estuarine Research Reserve/FL/Matanzas River Estuary (2004-2012, Eash-Loucks et al. 2014, on E. d.); FL/Halifax Creek (2005, Kruse and Hare 2007, E. d.)
Vectors
Level | Vector |
---|---|
Alternate | Oyster Accidental |
Alternate | Hull Fouling |
Regional Impacts
Ecological Impact | Parasitism | |
In southeast US estuaries, Loxothylacus panopaei is an abundant parasite of three species of panopeid crabs: Dyspanopeus sayi (Say's Mud Crab), Eurypanopeus depressus (Flatback Mud Crab), and Rhithropanopeus harrisii (Harris mud crab). As of 1983-86, its prevalence was greater on the last two species (Hines et al. 1997). Parasitism - The effects of L. panopaei on individual crabs are complex and diverse. The major impact is that both male and female infected crabs are castrated and unable to reproduce (Gissler 1884; Barnes 1983; Gould 1996), so that all of the host's feeding activity serves to support reproduction of the parasite. In order to maintain itself on a crab, L. panopaei extensively modifies the host's physiology and behavior. Details of the mechanisms are given in the "General Impacts" summary for this species. In 2004, 46% of 26 Eurypanopeus depressus collected at Jacksonville were parasitized. In 2005, 30% of 33 crabs had the parasite (Kruse and Hare 2007). In the Matanzas River estuary (FL), after the 1st appearance of the parasite in 2004, the abundance of Eurypanopeus depressus was greatly reduced, at least through 2012 (Eash-Loucks et al. 2014). | ||