Download or read book Genetic and Reproductive Variation in American Shad written by Eric Alan Shoubridge and published by . This book was released on 1978 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial Distribution of Neutral Genetic Variation in a Wide Ranging Anadromous Clupeid the American Shad Alosa Sapidissima written by Daniel J. Hasselman and published by . This book was released on 2010 with total page 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 A Study of the Reproductive Potential of the American Shad Alosa Sapidissima in the Connecticut River written by William C. Leggett and published by . This book was released on 1969 with total page 144 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 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 Reproductive Biology of American Shad Alosa Sapidissima in the Mattaponi River written by Aaron Reid Hyle and published by . This book was released on 2004 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of South Atlantic American Shad written by Robert Wayne Chapman and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2010-04 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of Microsatellite Loci and Pilot Population Genetic Analysis in Hickory Shad Alosa Mediocris written by Fnu Vishakha and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The hickory shad (Alosa mediocris) is a relatively understudied species of the anadromous fish sub-family Alosinae. This study, the first population genetic analysis of this species, employed 12 neutral microsatellite loci to estimate genetic diversity and population structure in tributaries of lower Chesapeake Bay, Virginia including James River and its tributaries (Appomattox and Chickahominy Rivers), Rappahannock River, and Pamunkey River. Genetic variation was extremely low. Estimates of observed heterozygosity were lower than expected heterozygosity. Significant population structure was detected among the six samples (FST = 0.093, p = 0.01). Effective population sizes were low (Ne ranged from 2 to 134). The lack of genetic diversity, especially compared to that of the American shad, was striking and could be the result of a bottleneck that took place more than thirty years ago which may plausibly account for the low genetic variation observed across all populations.
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 Ecological Genetics written by Leslie Real and published by Princeton University Press. This book was released on 2017-03-14 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume represents work by five distinguished ecological geneticists, offering an up-to-date source for theoretical concepts and experiments in an exciting field. Combining ecological fieldwork and laboratory genetics, ecological genetics examines the adjustments and adaptations of wild populations to their environments. Articles focus on important interactions between genetics and population ecology, delving into issues like gene flow and migration, population differentiation, the maintenance of genetic variation, and the demographic and spatial structure of populations. The contributors--Janis Antonovics, Michael Lynch, Montgomery Slatkin, Joseph Travis, and Sara Via--emphasize the importance of population size and structure, interaction between local selection and genetic drift, and an expanded phenotype including quantitative as well as qualitative characters. This new form of ecological genetics focuses on large-scale geographic variation in demographic and genetic dynamics among small, partially isolated populations and will prove extremely valuable in natural resource management and in rare or endangered species conservation. Originally published in 1994. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
Download or read book Reproductive Strategies in Local Populations of the American Shad Alosa Sapidissima written by Eric A. Shoubridge and published by . This book was released on 1977 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Migration The Biology of Life on the Move written by Davis Hugh Dingle Professor in the Department of Entomology and Center for Population Biology University of California and published by Oxford University Press, USA. This book was released on 1996-01-18 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: Migration is one of the most fascinating and dramatic of all animal behaviors. Historically, however, the study of migration has been fragmented, with ornithologists, entomologists, and marine biologists paying little attention to work outside their own fields. This treatment of the subject shows how comparisons across taxa can in fact illuminate migratory life cycles and the relation of migration to other movements. The book thus takes an integrated ecological perspective, focusing on migration as a biological phenomenon. The work is divided into four parts, each with a brief introductory section. Part I defines migration, gives examples, and places migration in the spectrum of movement behaviors, concluding with a chapter on methods for its study. Part II focuses on proximate mechanisms, including physiology and morphology (and the constraints associated with them), the interactions between migration and wind and current patterns, and the various orientation and navigation mechanisms by which migrants find their way about. Part III on the evolution of migratory life histories addresses the evolutionary and ecological basis for migration and the roles of migration not only in the lives of organisms, but also in the ecological communities in which they live. Part IV is devoted to a brief consideration of migration and its relation to pest management and conservation. As a major contribution to a vital subject, this work will be valued by all researchers and students in the field of animal behavior, ecology, and zoology.
Download or read book Studies on the Reproductive Biology of the American Shad alosa Sapidissima Wilson written by William Claude Gay Leggett and published by . This book was released on 1969 with total page 250 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.
