scholarly journals Survey of brook trout (Salvelinus fontinalis) population in the Upper Little Tennessee River watershed, Macon and Swain Counties, North Carolina

1993 ◽  
Author(s):  
Keyword(s):  
North Carolina ◽  
Brook Trout ◽  
Salvelinus Fontinalis ◽  
River Watershed ◽  
Tennessee River ◽  
Little Tennessee River

Cambarus ectopistes sp. nov., a new stream-dwelling crayfish (Decapoda: Cambaridae) from the French Broad, Pigeon, and Nolichucky River watersheds in the Appalachian Mountain region of North Carolina and Tennessee, USA

Zootaxa ◽  
2021 ◽  
Vol 5082 (4) ◽  
pp. 322-340
Author(s):  
ZACHARY J. LOUGHMAN ◽  
BRONWYN W. WILLIAMS
Keyword(s):  
North Carolina ◽  
New Species ◽  
Body Size ◽  
River Basin ◽  
Species Complex ◽  
Mountain Region ◽  
River Watershed ◽  
Appalachian Mountain ◽  
Tennessee River

The Cataloochee Crayfish, Cambarus ectopistes sp. nov., is a large, stream-dwelling crayfish that occupies a narrow noncontiguous distribution within the Appalachian Mountain region running through the Upper Tennessee River basin, in the French Broad, Pigeon, and Nolichucky watersheds along the Tennessee and North Carolina border. It is split from the southernmost extent of the C. robustus species complex, and is morphologically and genetically most similar to a second undescribed member of the group endemic to the upper Nolichucky River watershed in North Carolina. Cambarus ectopistes sp. nov. can be distinguished from other members of the C. robustus complex and co-distributed congeners by a combination of characters, including body size, coloration, and morphology of the chela and rostrum. The new species is typically found in channel and edge habitats of moderate to large perennial streams with large cobbles and boulders.  

Status Update for Six Rare Crayfishes (Decapoda: Cambaridae) in Western North Carolina

2014 ◽  
Vol 130 (2) ◽  
pp. 25-39
Author(s):  
William T. Russ ◽  
Stephen J. Fraley
Keyword(s):  
North Carolina ◽  
Conservation Status ◽  
Limited Range ◽  
Distribution Data ◽  
Savannah River ◽  
Isolated Populations ◽  
River Drainage ◽  
Tennessee River ◽  
Western North Carolina ◽  
Little Tennessee River

Abstract From 2009–2012 detailed distribution data, information to update conservation status, and additional life history and habitat observations were obtained for six rare crayfishes in Western North Carolina. The Hiwassee Headwaters Crayfish, Cambarus (Puncticambarus) parrishi, continues to occupy a very limited range in Clay County, with most known occurrences from the Tusquitee Creek system. The Chauga Crayfish, C. (P.) chaugaensis, appears to be abundant throughout much of its range in the upper Savannah River Drainage, in Transylvania, Jackson, and Macon counties. The French Broad River Crayfish, C. (P.) reburrus, has declined in Madison and Buncombe counties, while populations in Transylvania County appear to have remained relatively stable. The Broad River Stream Crayfish, C. (Cambarus) lenati continues to occur primarily in the upper First Broad River drainage where it is common in some streams in Rutherford County. The Broad River Spiny Crayfish, C. (P.) spicatus is rare but continues to exist in two isolated populations: upper First Broad and North Pacolet river drainages. The Little Tennessee River Crayfish, C. (P.) georgiae continues to occupy Jackson and Macon counties where it is most abundant in the upper Little Tennessee River Drainage. No range expansions were observed for any of these crayfish species.

Population structure and mantle display polymorphisms in the wavy-rayed lampmussel, Lampsilis fasciola (Bivalvia: Unionidae)

2007 ◽  
Vol 85 (11) ◽  
pp. 1169-1181 ◽  
Author(s):  
David T. Zanatta ◽  
Stephen J. Fraley ◽  
Robert W. Murphy
Keyword(s):  
North Carolina ◽  
Population Structure ◽  
Gene Flow ◽  
Tennessee River ◽  
Assignment Tests ◽  
Genotype Assignment ◽  
Little Tennessee River ◽  
Dna Microsatellite ◽  
River Drainages ◽  
Very High

Genotypes from 10 polymorphic DNA microsatellite loci were used to make assessments of population structure, measurements of gene flow, and attempts to genetically segregate polymorphic host fish-attracting mantle displays for the wavy-rayed lampmussel, Lampsilis fasciola Rafinesque, 1820 — an endangered species in Canada. Specimens were collected from seven localities — six in the Great Lakes drainages of Ontario, Canada, and one from the Little Tennessee River in North Carolina, USA. Four distinct and sympatric mantle display morphologies were observed on female L. fasciola. Displays could not be distinguished genetically using analysis of molecular variance and genotypic assignment tests. The diversity of mantle displays was correlated with the overall genetic diversity observed among populations of L. fasciola. In managing populations of L. fasciola for propagation, augmentation, and translocation, polymorphic lures should be represented in proportion to what is observed in wild populations. Through moderately high FST values and high assignment to population in genotype assignment tests, genetic structure was evident among the river drainages. Within-drainage gene flow was very high, and sampling localities within the Ontario drainages displayed panmixia. Efforts in artificial propagation and possible translocations to reintroduce or augment populations should be made to maintain the substantial levels of genetic variation while maintaining distinctiveness.

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