Download or read book A Biochemical and Genetic Analysis of American Shad Alosa Sapidissima Migrating Into Chesapeake Bay written by Edward Norbert Sismour and published by . This book was released on 1985 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Evaluation of American Shad Alosa Sapidissima Restoration Success in James River Virginia written by Aaron Aunins and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The American shad Alosa sapidissima has experienced severe declines throughout its native range due to habitat degradation, fragmentation, and over-fishing. Hatchery supplementation is often used for stock restoration, but the effects of supplementation on population structure and genetic diversity are rarely assessed. This study employed molecular markers to evaluate how supplementation of the James River American shad population with Pamunkey River origin larvae since 1994 has impacted genetic diversity and population structure. Population genetic parameters of other major Chesapeake Bay tributaries (Susquehanna, Rappahannock, Potomac, and Nanticoke) also were characterized. Prior to stocking, the James and Pamunkey populations exhibited subtle genetic differentiation, which was absent among post-supplementation samples, presumably due to the stockings. A similar situation was observed among other shad populations of Chesapeake Bay tributaries which were subtly differentiated in the 1990s but lacked any credible among-population differentiation among contemporary samples. Genetic diversity of the James River shad population was high prior to stocking, and remained high throughout years of intensive supplementation, yet the current population decline suggests that the James River shad population still has not recovered. Despite harvest curtailment, elimination of the ocean intercept fishery, and widespread supplementation efforts, Chesapeake Bay tributary American shad populations are collectively at their lowest levels in recorded history. Therefore, success of other restoration goals such as creation of fish passage in James River was investigated in a concurrent radio telemetry study to assess passage at Bosher's Dam fishway. Ninety-four American shad were radio-tagged on the spawning grounds below Bosher's Dam. Approximately one-half of the tagged shad were detected at the escapement receiver within 24 hours after tagging, and the average residence times of remaining shad were approximately one week. No tagged shad were detected above Bosher's Dam. These results imply that restricted passage through Bosher's Dam fishway may be an important factor in the failure of James River American shad to recover. Therefore, improving passage at migratory barriers such as Bosher's Dam, in conjunction with a continued Bay-wide fishing moratorium, may be more beneficial to shad restoration efforts in James and other Chesapeake Bay tributaries than continued supplementation.

Download or read book Genetic Analysis of American Shad Entering Chesapeake Bay written by U. S. Government Printing Office (Gpo) and published by BiblioGov. This book was released on 2013-06 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Government Printing Office (GPO) was created in June 1860, and is an agency of the the U.S. federal government based in Washington D.C. The office prints documents produced by and for the federal government, including Congress, the Supreme Court, the Executive Office of the President and other executive departments, and independent agencies. The Coastal Zone Information Center (CZIC) collection provides access to nearly 5,000 coastal related documents that the U.S. Government Printing Office (GPO) received from the National Oceanic and Atmospheric Administration (NOAA) Central Library. The collection provides almost 30 years of data and information crucial to the understanding of U.S. coastal management and NOAA's mission to sustain healthy coasts. This is one of their documents.

Download or read book Genetic Analysis of American Shad Entering Chesapeake Bay written by Bonnie L. Brown and published by . This book was released on 1991 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Yearly release of shad fry and of live pre-spawned adult shad from six other source rivers accompanied the lift operation beginning in 1982 ... In view of the apparent success of shad management efforts in Susquehanna River, a program of study was proposed to the Maryland DNR Chesapeake Bay Research and Monitoring Division's Power Plant Topical Research Program designed to examine population dynamics underlying the resurgent American shad population in Susquehanna River using molecular genetic techniques."--P. 4.

Download or read book Suitability of the Susquehanna River for Restoration of Shad written by and published by . This book was released on 1968 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Investigation of the Resurgence of American Shad in the Susquehanna River written by Robert W. Chapman and published by . This book was released on 1993 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fisheries Review written by and published by . This book was released on 1992 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mitochondrial DNA Analysis of American Shad Alosa Sapidissima Populations written by Kathleen A. Nolan and published by . This book was released on 1992 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tagging Summary of American Shad Alosa Sapidissima Wilson and Striped Bass Roccus Saxatilis Walbaum Bureau of Commercial Fisheries Biological Laboratory Beaufort N C 1950 65 written by Paul Ruffner Nichols and published by . This book was released on 1966 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Shad written by Chet MacKenzie and published by . This book was released on 1985 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sport Fishery Abstracts written by and published by . This book was released on 1988 with total page 674 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.

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 A Review of the Current Status of the American Shad Alosa Sapidissima in the Susquehanna River written by Bruce D. Sidell and published by . This book was released on 1979 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Migratory Patterns of American Shad Alosa Sapidissima Revealed by Natural Geochemical Tags in Otoliths written by Benjamin Dwaine Walther and published by . This book was released on 2007 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: (Cont.) Only 6% of spawners originated from rivers other than the York, supporting the hypothesis that most American shad spawn in their natal river. Of remaining spawners, 79% originated from the Mattaponi River and 21% from the Pamunkey River. The results suggested that while most American shad home to their natal river there is less fidelity to individual tributaries, allowing subsidies to subpopulations with persistent recruitment failure. Otolith signatures were also used in mixed-stock analyses of immature migrants along the coast of Maine in the spring and Minas Basin in the summer. Mixed-stock compositions showed remarkably low diversity and were dominated by fish from the Shubenacadie and Hudson rivers, with an increasing proportion of Potomac River fish over time. In contrast to results from adult tagging studies, southern stocks were virtually absent. These data suggest ontogenetic shifts in migratory behavior. The thesis concludes with a report that water contributed 83% of Sr and 98% of Ba in the otoliths of a marine fish.

Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 1995 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Migration Behavior of Introduced American Shad Alosa Sapidissima in the Columbia and Snake River System as Related to Recent Growth History written by Robert Hogg and published by . This book was released on 2008 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: