Multivariate and Univariate Analyses of the Geographic Variation within Etheostoma Flabellare (Pisces: Percidae) of Eastern North America
Abstract (Summary)A series of multivariate discriminant function analyses, utilizing 31 meristic, morphometric, and pigmentation characters, indicated Etheostoma flabellare Rafinesque is a widespread polytypic species. There are five recognizable (92 to 96 percent of the time) allopatric forms within E. flabellare.The five allopatric forms are combined into two multivariate groups: a Montane-East Slope group, including E. f. robustum (n. ssp.), E. f. humeralis, and E. f. brevispina; and an Interior group, including an Ozark-Tennessee River assemblage and E. f. flabellare.The nominate form E. f. flabellare inhabits the Mississippi, Ohio, and Great Lakes basins, and isolated localities in the Mohawk, Hudson, and upper Susquehanna Rivers; indicating the subspecies ability to transgress drainage divides, especially in terrain formerly covered by Wisconsinan glacial ice.Etheostoma f. lineolatum (Agassiz) is reduced to a synonym of E. f. flabellare; since there is clinal variation between the two forms, any division along this cline would be arbitrary.Another questionable form (recognized via discriminant analysis 92% of the time from adjacent populations), herein termed the Ozark-Tennessee group, inhabits the White River system of the Ozark Uplands in Missouri and Arkansas, and tributaries of the lower Tennessee River in the southern Appalachians. Further analysis of this form (including specimens from the geographically intermediate populations, i.e., the Duck, Clarks, and Buffalo Rivers) is needed to clearly define its geographic distribution and relationship with the nominate form.Etheostoma f. robustum (new subspecies) inhabits the upper Tennessee River system (upstream of the confluence of the Little Tennessee River), New River, and as a localized population in headwaters of Shavers Fork Cheat River (Monongahela River drainage).Etheostoma f. flabellare and E. f. robustum are both present in Shavers Fork, but are not syntopic. Intergrades between the two subspecies are identified from headwaters of the Guyandot, Coal, and Elk Rivers, West Virginia.Etheostoma f. humeralis inhabits the Atlantic slope drainages, including the lower Susquehanna, Potomac, James, Roanoke, Neuse, and probably Cape Fear Rivers.Etheostoma f. brevispina is the most southern representative of the barred fantail group on the Atlantic slope, inhabiting the Catawba, Broad, and Pee Dee River drainages in North and South Carolina.
School:The Ohio State University
School Location:USA - Ohio
Source Type:Master's Thesis
Date of Publication:01/01/1985