Download or read book Roanoke River American Shad Spawning Stock Survey written by and published by . This book was released on 2018 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: N.C. Wildlife Resources Commission performs an annual shad survey due to the ecological and economic importance of the local shad fishery.

Download or read book Characterizing American Shad Spawning Habitat in the Upper Roanoke River Basin Virginia written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Populations of American shad (Alosa sapidissima) have declined from historical levels due to overfishing, decreased water quality and habitat losses including those due to dam construction. One approach for restoring these populations is to identify suitable habitat upstream of dams that could be restored through dam removal or by providing fish passage. The goal of this research is to identify and characterize potential spawning habitat for American shad in the upper Roanoke River basin of Virginia, above Kerr Reservoir. Five mainstem rivers that are upstream of the Roanoke Rapids, Gaston, and Kerr dams (Big Otter, Staunton, Banister, Dan, Hyco) were the focus of this research. Roanoke Rapids Dam is the first obstruction to American shad spawning migration in the Roanoke River basin, and just completed the FERC (Federal Energy Regulatory Commission) relicensing process in 2004. One of the provisions of the new license is to evaluate a trap and transport program for spawning American shad. Characterizing the habitat above the dam, in terms of suitability, is an important step in predicting the benefits of fish passage. A detailed physical habitat assessment, including monthly water quality monitoring, indicated that the Banister and Hyco rivers consistently had lower dissolved oxygen concentrations and may provide lower quality habitat for American shad compared to the other rivers. However, according to the current published Habitat Suitability Index (HSI) model, which incorporates surface water temperature and current velocity as criteria for suitable habitat, the five rivers appear to contain suitable habitat with HSI values ranging from 0.83 to 1.00 during May. I constructed a modified HSI model with surface water temperature and current velocity, as well as dissolved oxygen, pH and a component for substrate composition. The modified model suggested that the Big Otter and Staunton rivers would provide the highest quality spawning habitat for American shad becaus.

Download or read book Migration and Spawning of Anadromous Shads in the Roanoke River North Carolina written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Anadromous alosines are ecologically, commercially, and recreationally valuable fishes. Some populations of alosines are at historically low levels, as a result of overfishing, pollution and habitat change, including the presence of dams, which block access to historic spawning sites upstream and alter spawning habitat downstream. To aid in the restoration of alosine stocks, I evaluated several methods for spawning habitat identification and characterization and evaluated trap and transport as a method to give American shad Alosa sapidissima access to additional spawning habitat above dams in the Roanoke River, North Carolina and Virginia. The Roanoke River has four anadromous shads: American shad, hickory shad A. mediocris, blueback herring A. aestivalis, and alewife A. pseudoharengus. For all four alosines, spawning sites river-wide were most efficiently identified using plankton tows. Spawning habitat selection for hickory shad and river herring (blueback herring and alewife) could be evaluated using spawning pads, whereas American shad eggs were unsuccessfully sampled by spawning pads and spawning habitats were best examined by visual observations of spawning splashes. Unlike the other alosines in this study, very little is known about spawning habitat for hickory shad. Hickory shad eggs were collected at water temperatures from 10 to 23 Ã'ÂðC, and peaked from 11 to 14 Ã'ÂðC. Spawning generally occurred in water velocities Ã؉ÂÆ0.1 m/sec, over substrates free from silt. Standard USFWS and Bayesian belief network formats were used to develop preliminary habitat suitability models for hickory shad. Bayesian belief networks are a relatively new method for modeling habitat suitability for fishes, but could prove very useful in the future, especially for species such as American shad which have been the focus of more study and are in need of restoration. We evaluated movement patterns and spawning of sonic-tagged adult American shad transported to habitats above da.

Download or read book Characterizing American Shad Spawning Habitat in the Upper Roanoke River Basin Virginia written by Alesia Noelle Read and published by . This book was released on 2004 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: habitat, American shad, Habitat Suitability Index Model.

Download or read book Status of the American Shad Alosa Sapidissima Wilson in North Carolina written by Sara E. Winslow and published by . This book was released on 1990 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Migration and Spawning of Anadromous Shads in the Roanoke River North Carolina written by Julianne Elaine Harris and published by . This book was released on 2010 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: Alosines, American shad, hickory shad, spawning habitat, effects of dams, matrix model.

Download or read book Anadromous Fish Stream Survey and Improvement Program written by and published by . This book was released on 1977 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Shad written by Douglas E. Facey and published by . This book was released on 1986 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Preliminary Report on a Survey of the Sport Fishery for American Shad in the Upper St Johns River and the Utilization of the Area for Spawning written by Paul R. Nichols and published by . This book was released on 1963 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fishery Bulletin written by and published by . This book was released on 2014 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Neuse River American Shad Survey 2019 2020 written by and published by . This book was released on 2020 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Shad Genetic Analysis 2022 written by Heather Katheryn Jimenez Evans and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: American shad, Neuse, Roanoke, Parentage-based tagging, effective population. North Carolina Wildlife Resources Commission (NCWRC) staff provided 479 American Shad Alosa sapidissima samples in 2022 for parentage-based tagging (PBT) analysis. Fin clips were from the Roanoke River (n = 185) and Neuse River (n = 294). Hatchery contribution was 47.0% for Roanoke River adults and 2.4% for Neuse River adults. The effective population estimate (Ne) for 2022 Roanoke River American Shad was 637 (95% confidence interval = 416–1259) and for Neuse River American Shad was 10,558 (95% confidence interval = 1525–infinite)--Page [1].

Download or read book Monitoring the Abundance of American Shad and River Herring in Virginia s Rivers written by Eric James Hilton and published by . This book was released on 2018 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the results of the twentieth year of a continuing study to estimate the relative abundance and assess the status of American shad (Alosa sapidissima) stocks in Virginia by monitoring the spawning runs in the James, York and Rappahannock rivers in spring 2017, evaluating hatchery programs, and contributing to coast-wide assessments (ASMFC 2007). We also report on two fishery-independent monitoring programs, one using staked gillnets in the Rappahannock River (year 2) and the other using anchor gillnets in the Chickahominy River (year 3; a major tributary of the James River),to determine relative abundance and stock structure for the adult spawning run of river herring (A. pseudoharengus, and A. aestivalis Further, we report on the third year of a monitoring program for juvenile alosines by using nighttime surface trawls in the Chickahominy River and calculate an index of juvenile abundance. Additional objectives were to monitor bycatch of American shad in a permitted gill-net fishery and American shad and river herring in pound-net fisheries.

Download or read book Justification of the budget estimates Bureau of Land Management written by United States. Congress. House. Committee on Appropriations. Subcommittee on Department of the Interior and Related Agencies and published by . This book was released on 1990 with total page 1574 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Migration patterns of American shad in the nearshore ocean waters of southeastern North Carolina written by Jerry A. Parker and published by . This book was released on 1990 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The purpose of this study was to determine the migration patterns of American shad in the nearshore ocean waters of southern North Carolina and to ascertain if the developing gill net fishery in that area for American shad may be intercepting South Carolina's spawning stock."--Leaf 2.

Download or read book American Shad in the Susquehanna River Basin A Three Hundred Year History written by Richard Gerstell and published by Penn State Press. This book was released on 1998 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Shad Genetic Analysis 2021 written by Heather Katheryn Jimenez Evans and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: American shad, Neuse, Roanoke, Parentage-based tagging, effective population. North Carolina Wildlife Resources Commission (NCWRC) staff provided 424 American Shad Alosa sapidissima samples in 2021 for parentage-based tagging (PBT) analysis. Fin clips were from the Roanoke River (n = 160) and Neuse River (n = 264). Adult hatchery contribution was 43.8% for Roanoke River and 4.3% for Neuse River adults. The effective population estimate for 2021 Roanoke River American Shad was 1337 (95% confidence interval = 596-infinity--Page 1.