Download or read book A Framework for Construction and Analysis of Juvenile Abundance Indices for American Shad Alosa Sapidissima in the York River Virginia written by Mary Lynn Aiken and published by . This book was released on 2000 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Monitoring the Abundance of American Shad and River Herring in Virginia s Rivers written by and published by . This book was released on 2019 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Habitat Suitability Index Models for Riverine Life Stages of American Shad with Proposed Models for Premigratory Juveniles written by Robert M. Ross and published by . This book was released on 1993 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Habitat Suitability Index Models and Instream Flow Suitability Curves written by David J. Stier and published by . This book was released on 1985 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Age and Growth of Age 0 American Shad Alosa Sapidissima in Four Virginia River Habitats Based on Otolith Microstructure Analysis written by Kevin Mark Gooss and published by . This book was released on 2001 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecological Constraints on Growth and Migration of Juvenile American Shad Alosa Sapidissima Wilson in the Hudson River Estuary New York written by Karin E. Limburg and published by . This book was released on 1994 with total page 750 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 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 Shad Fishery of Chesapeake Bay with Special Emphasis on the Fishery of Virginia written by Charles H. Walburg and published by . This book was released on 1957 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: A study of the American shad (Alosa sapidissima) in Chesapeake Bay was made in 1952. Catch and effort records were combined with data obtained from tagging studies conducted at the entrance to Chesapeake Bay, in the James and Potomac Rivers, and at Cove Point (Maryland) to obtain population parameters for these areas. These studies were successful except for the results of tagging at the mouth of the Bay, which data could not be used because of a disproportionate tag recovery-catch ratio between the various areas of Chesapeake Bay. Total population and escapement were determined for each year in which data were available. It is recommended that the States of Maryland and Virginia establish comparable systems for the collection of catch-and-effort records on the shad so that these basic data will be available for any future study of the Chesapeake Bay fisheries.
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 Alosa Sapidissima Larval Distribution Relative Abundance and Movement in the Holyoke Pool Connecticut River Massachusetts written by Jon Robert Cave and published by . This book was released on 1978 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Factors Affecting Passage of American Shad Alosa Sapidissima Wilson at Holyoke Dam Massachusetts and Assessment of Juvenile Growth and Distribution Above the Dam written by Michael Dean Scherer and published by . This book was released on 197? with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparative Study of Juvenile American Shad Populations by Finray and Scute Counts written by Paul Ruffner Nichols and published by . This book was released on 1966 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abundance and Exploitation Rate of American Shad in the York River System written by John M. Hoenig and published by . This book was released on 2000 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characteristics of the Downstream Migration of Juvenile American Shad Alosa Sapidissima and Blueback Herring Alosa Aestivalis in the Connecticut River written by John A. O'Leary and published by . This book was released on 1984 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
