Download or read book Biological Reference Points for Albemarle Sound Roanoke River Stock of Striped Bass written by John Carmichael and published by . This book was released on 2002 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Habitat Suitability Index Models written by Mark B. Bain and published by . This book was released on 1982 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phenology in a Changing Environment Assessing and Forecasting the Timing of the Spawning Migration of the Albemarle Sound and Roanoke River Stock of Striped Bass written by Quentin Bratkowski Nichols and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The seasonal timing of key biological events (phenology), such as migrations, can vary greatly and have strong impacts on fisheries and their management. The Striped Bass (Morone saxatilis) population of the Roanoke River undergoes a yearly upstream spawning migration and subsequently becomes susceptible to an estuarine and freshwater fishery that has a seasonal closure set on May 1st each year. This seasonal closure is static each year yet tagging studies of Albemarle Sound/Roanoke River (A/R) Striped Bass stock indicate their migration timing can be highly variable. The objective of this study is to create an ecological forecast of the A/R stock of Striped Bass migration timing. The forecast revealed the overwhelming importance of Roanoke River discharge on A/R stock migration timing, with a consistent indication that late February to early March is when discharge becomes a key factor. This may be of interest to stakeholders involved in the management of the Roanoke River flow regime, especially as impacts of flows on Striped Bass recruitment have been highlighted as an area of future research in the most recent stock assessment. Another implication of this research for management is that the migration timing of Striped Based has shifted earlier in the year in relation to the current seasonal fishery closure. Temperatures in the Roanoke River and overwintering grounds of coastal Virginia have increased over the study period, which could be driving this shift to earlier migration phenology. Nonetheless, despite a high amount of variance explained, the forecast proved to have low predictive skill up until right before the typical spawning timing and was only able to skillfully predict Striped Bass spawning during years with normally timed phenology. Thus, an operational nowcast of Striped Bass spawning phenology would be possible to develop, but additional research would be needed if stakeholders require longer lead times to act on a forecast. A separate analysis using historical egg survey data analyzed the effect of different sampling frequencies on phenology metrics. These metrics were computed based on a hypothetical sampling schedules of between one and five days per week. Accuracy of calculated phenology metrics compared to observed phenology gradually increased with increasing sampling effort. Eggs have not been collected on the Roanoke River since 1993, yet migration phenology has shifted earlier in recent years. Additional efforts to survey Striped Bass eggs on the Roanoke River should be considered to assess if spawning has also shifted earlier and to support development of a potential phenology nowcast, which could be useful for anglers, fisheries managers, and water managers.
Download or read book Report on the Albemarle Sound Roanoke River Stock of Striped Bass written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synopsis of Biological Data on Striped Bass Morone Saxatilis Walbaum written by Eileen M. Setzler-Hamilton and published by . This book was released on 1980 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status of the Albemarle Sound Roanoke River Striped Bass Stock in 1997 written by and published by . This book was released on 1998 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The status abundance and exploitation of striped bass in the Roanoke River and Albemarle Sound North Carolina 1982 1983 written by William W. Hassler and published by . This book was released on 1984 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book North Carolina Striped Bass Monitoring written by Jason L. Dilday and published by . This book was released on 1999 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Emergency Striped Bass Research Study 1981 Annual Report written by and published by . This book was released on 1981 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Emergency Striped Bass Research Study Report for written by and published by . This book was released on 1989 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Maturation Fecundity and Spawning Frequency of the Albemarle Roanoke Striped Bass Stock written by Jacob B. Boyd and published by . This book was released on 2011 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal striped bass, Morone saxatilis population in North Carolina, the Albemarle/Roanoke (A/R) stock has grown tremendously in size and age structure over the last twenty years necessitating an up-to-date maturity and fecundity schedule. The last study was conducted for the Albemarle Striped Bass Management Board in 1989-1990 by Olsen and Rulifson (1992) after the stock had crashed, and just before stock rebuilding took place. There have been many advances in the understanding of teleost reproduction since their study and in recent years, otolith microchemistry with concentrations of elements such as strontium (88Sr) has been used to determine movement and migration of different species to delineate movement from freshwater to more saline environments. The objectives of this study were to complete a maturation and fecundity schedule, compare results to Olsen and Rulifson (1992), and test the use of 88Sr to elucidate migration patterns. Samples were collected (n=453) in 2009 and 2010 on the Roanoke River near the spawning grounds and in Albemarle Sound during the pre-spawn, spawning, and post-spawn periods (March through May) with total lengths (TL) ranging from 300 to 1,080 mm corresponding to age-3 to age-16. Striped bass are total spawners with determinate fecundity maturing one clutch or group of oocytes each year and having primary growth oocytes (PG) at each stage of development. Female striped bass were 96.8% mature by age-4 with fecundity ranging from 176,873 eggs (age-3) to 3,163,130 eggs (age-16). These findings are different from Olsen and Rulifson (1992) who reported 92.9% mature by age-4 with 43.8% overall greater fecundity estimates attributed to the sample size and methodologies. Otoliths were examined using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) to determine changes in concentrations of the element 88Sr over the life of the fish that reflect high salinity or freshwater environments and fish were assigned residency (77.4%) or anadromy (22.6%). It is recommended that management agencies continue to consider age-4 female striped bass the first year class to contribute to the spawning population in the A/R stock and to keep the minimum size limit of 18 in in place; however, adjusting the slot limit of 22-27 in would be beneficial to fishermen without decreasing the spawning stock. It is recommended to continually monitor the reproductive rates of the population to ensure the health of the stock.
Download or read book Roanoke River Basin Albemarle Sound Historical Striped Bass Project written by Michael W. Street and published by . This book was released on 1992 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The specific objectives of this project were: 1. To acquire all of Dr. Hassler's historical data for striped bass and related studies in the Albemarle Sound-Roanoke River are during 1955-1987; 2. To organize and catalog the data; and 3. To prepare describing the data, including a brief plan for computerization of the data so it can be made available for analysis."--Leaf 3.
Download or read book Striped Bass Monitoring written by Stephen D. Taylor and published by . This book was released on 1994 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Project F-53 updates and compliments the historical long-term monitoring database for the Albemarle Sound/Roanoke River stock of striped bass (Morone saxatilis). Annual juvenile striped bass sampling was conducted at seven trawl stations in western Albemarle Sound July-October, 1992-1992"--Leaf ii.
Download or read book Linking Estuarine Water Quality and Impacts on Living Resources written by Charles C. Coutant and published by . This book was released on 1987 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Status Report on Albemarle Sound Roanoke River Striped Bass Spring 1986 written by Michael W. Street and published by . This book was released on 1986 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Habitat Suitability Index Models and Instream Flow Suitability Curves written by Johnie H. Crance and published by . This book was released on 1984 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Historical Ecology of Striped Bass Stocking in the Southeastern United States written by Jennifer Rebecca Woodroffe and published by . This book was released on 2012 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: Striped bass (Morone saxatilis) is the most recreationally and commercially important non-salmonid fish species in the continental United States. As such, it has been exploited to the point of collapse at various points throughout our Nation's history. The population crash of the 1980s made both fishers and fishery scientists aware of its sensitivity to overfishing and habitat degradation, joining two disparate groups in a common cause with a common goal--recovery. Fishing moratoriums, habitat restoration, and intensive stocking efforts were utilized throughout the 1980s and 1990s in order to restore the severely depleted stocks of America's favorite fish. Research conducted during this study focused on the states of Virginia, North Carolina, South Carolina, Georgia, and Florida at both the state and Federal level. Roanoke River/Albemarle Sound striped bass have been stocked throughout the United States, particularly within the study area. This population has been artificially propagated since 1879 with the number of fry and fingerlings stocked numbering in the billions. The discovery of a self-sustaining land-locked population in the Santee-Cooper Reservoir renewed interest in this game fish, spawning hatchery production in Virginia, South Carolina, Georgia, and Florida as well as other states. Like the Roanoke River/Albemarle Sound population, the Santee-Cooper population has been heavily stocked throughout the study area, creating a potential loss of genetic integrity. Our awareness of the effects of cross-stocking different strains of striped bass has grown over the last 30 years and it is necessary to determine what the historical stocking record has been so that we might better manage future stockings with an eye to restoring native strains where they have been previously depleted or extirpated. Genetic work by other researchers has been hindered due to a lack of knowledge regarding the number and strength of the strains stocked. This study is an attempt to rectify that unfortunate imbalance.
