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File ECMAScript program Three new darter species of the Etheostoma percnurum species complex (Percidae, subgenus Catonotus) from the Tennessee and Cumberland River Drainages
by Jessica Rhodes — published Jun 22, 2015 — filed under: , , ,
The federally endangered Duskytail Darter, Etheostoma percnurum Jenkins, is known from only six highly disjunct populations in the Tennessee and Cumberland river drainages of Kentucky, Tennessee, and Virginia. Only four are extant. Variation in morphology including meristics, morphometrics, and pigmentation was examined among the four extant populations and limited specimens from the two extirpated populations (Abrams Creek and South Fork Holston River). Analyses of these data found each of the extant populations is morphologically diagnosable. The few specimens avail- able from Abrams Creek and South Fork Holston River prevented thorough assessment of variation, and these were grouped with their closest geographic counterparts, Citico Creek, and Little River, respectively. Three new morphologi- cally diagnosable species are described: E. sitikuense, the Citico Darter, from Citico Creek, Abrams Creek, and Tellico River (Tennessee River system); E. marmorpinnum, the Marbled Darter, from the Little River and South Fork Holston River (Tennessee River system); and E. lemniscatum, the Tuxedo Darter, from the Big South Fork (Cumberland River system). Each species warrants federal protection as an endangered species.
Located in Reports & Documents
File Population Performance Criteria to Evaluate Reintroduction and Recovery of Two Endangered Mussel Species, Epioblasma brevidens and Epioblasma capsaeformis
by Jessica Rhodes — published Jun 22, 2015 — last modified Jun 02, 2025 01:11 PM — filed under: , , ,
Genetic and demographic modeling of two endangered mussel species, Epioblasma brevidens and E. capsaeformis, in the Clinch River, U.S.A., was conducted to determine quantitative criteria to evaluate performance of extant and reintroduced populations. Reintroduction modelling indicated that the initial population size created during a 5 year build-up phase greatly affected final population size at 25 years, being similar to the population size at the end of the build-up phase, especially when population growth rate was low. Excluding age 0 individuals, age 1 juveniles or recruits on average comprised approximately 11% and 15% of a stable population of each species, respectively. Age-class distribution of a stable or growing population was characterized by multiple cohorts, including juvenile recruits, sub-adults, and adults. Because of current barriers to dispersal and the low dispersal capability of some mussel species, reintroductions will play a prominent role in restoring populations in the United States.
Located in Reports & Documents
File Hydrologic Units within the Tennessee River Basin
by Jessica Rhodes — published Apr 10, 2015 — last modified Jun 02, 2025 01:11 PM — filed under: , ,
Unit name and total area (square miles) for 2, 4, 6, and 8 digit hydrologic units within the Tennessee River System.
Located in Reports & Documents
File Using a structured decision making process for strategic conservation of imperiled aquatic species in the Upper Tennessee River Basin
by Jessica Rhodes — published Dec 04, 2015 — last modified Jun 02, 2025 01:11 PM — filed under: , , , , ,
Development of strategic conservation of imperiled species faces several large challenges, including uncertainty in species response to management actions, budgetary constraints that limit options, and issues with scaling expected conservation benefits from local to landscape levels and from single to multiple species. We used a structured decision making process and a multi-scale approach to identify a cost-effective conservation strategy for the imperiled aquatic species in the Upper Tennessee River Basin (UTRB), which face a variety of threats. The UTRB, which encompasses a landscape of 22,360 square miles primarily in Virginia, North Carolina, and Tennessee, harbors one of the most globally diverse assemblages of freshwater fishes and mussels occurring at temperate latitudes. In developing the strategy, we sought to identify which management actions to emphasize to best achieve recovery of imperiled aquatic species, given costs and uncertainty in management effectiveness. The strategy was developed for conservation implementation over a 20-year period, with periodic review and revision. In this presentation, we describe the ecological significance of the UTRB, the planning process, and the resulting strategy. A strategic emphasis on population management emerged as the optimal approach for achieving conservation of imperiled aquatic species in the UTRB, which aligns well with the goals of existing plans for conserving and recovering imperiled fishes and mussels in the UTRB. The structured planning process and resulting conservation strategy dovetail with the landscape approach to conservation embodied in the USFWS’s strategic habitat conservation approach and network of Landscape Conservation Cooperatives. The recorded webinar is also available for viewing at the following link: http://www.fws.gov/northeast/science/seminars/July2015.html.
Located in News & Information / Webinars and Presentations
File UTRB Imperiled Aquatic Species Conservation Strategy Presentaion - Schulz 2015
by Jessica Rhodes — published May 29, 2015 — last modified Jun 02, 2025 01:11 PM — filed under: , , ,
Powerpoint presentation of an overiew of the Imperiled Aquatic Species Strategy for the Upper Tennessee River Basin presented by Cindy Schulz on January 30, 2015.
Located in News & Information / Webinars and Presentations
File Upper Tennessee River Basin Strategy Communications Subteam - March 2016 Call
by Jessica Rhodes — published Mar 10, 2016 — last modified Jun 02, 2025 01:11 PM — filed under: , , , ,
Notes from the Upper Tennessee River Basin Strategy Communications subteam call on March 7, 2016.
Located in Team and Partner Workspace / Communications
File Octet Stream Marxan Training Overall Agenda PDF
by Jessica Rhodes — published Apr 30, 2015 — filed under:
PDF of the Agenda for Day 1 and Day 2 of Marxan training.
Located in Training / Marxan Training / Marxan Training Resources
Training
by Jessica Rhodes — published Aug 12, 2015 — last modified Oct 02, 2019 07:02 PM
Tennessee River Basin Network Training Resources
Spatial Data ECMAScript program Tennessee River Basin Boundary
by Jessica Rhodes — published Aug 11, 2015 — last modified Jan 26, 2018 12:21 PM
This data includes a shapefile of the boundaries of the entire Tennessee River Basin. The total are includes 41,027 square miles.
Located in Resources / Data
Spatial Data Upper Tennessee River Basin Boundary
by Jessica Rhodes — published Aug 11, 2015
This shapefile includes the boundary for the Upper Tennessee River Basin as defined by the National Hydrologic Dataset. The total area for the Upper Tennessee River Basin is 17,271 square miles.
Located in Resources / Data