Download or read book Maturation and Fecundity of Roanoke River Albemarle Sound Striped Bass Morone Saxatilis written by Erik J. Olsen and published by . This book was released on 1991 with total page 130 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 The Status and Abundance of Striped Bass M o r o n e S a x a t i l i s in the Roanoke River and Albemarle Sound North Carolina 1956 1980 written by William W. Hassler and published by . This book was released on 1981 with total page 156 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 The Status and Abundance of Striped Bass Morone Saxatilis in the Roanoke River and Albemarle Sound North Carolina 1977 1981 written by William W. Hassler 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 Maturation and Fecundity of the Neuse and Tar Pamlico Rivers Striped Bass Morone Saxatilis Stocks in Coastal North Carolina written by Evan Herring Knight and published by . This book was released on 2016 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Albemarle/Roanoke stock makes up the largest contingent of Striped Bass (Morone saxatilis) in the state; however, other economically important populations exist elsewhere. The Central Southern Management Area (CSMA) is one such region. Striped Bass populations are sustained in the CSMA through stocking by the North Carolina Wildlife Resources Commission (NCWRC), but the goal of the fishery management plan is to establish a self-sustaining spawning population of Striped Bass in the region. In order to improve management of the CSMA Striped Bass population, maturation and fecundity estimates are needed for stock assessment models. Striped Bass were sampled on and near the spawning grounds in the Neuse and Tar/Pamlico rivers during the pre-spawn, spawning, and post-spawn period (February-June). Each fish was measured (fork length and total length, mm) and weighed (g). Otoliths were removed for ageing and otolith chemistry. Sex was determined, and gonads were removed and weighed to determine the GSI and phase of reproduction. LSI and K factors were used to assess the condition of fish. Otoliths were sectioned for age, and then examined by LA-ICPMS to determine changes in concentrations of Strontium in the first year of life to determine origin. The age at 50% maturity was 2.67 years; by Age 3 98.2% of female Striped Bass were sexually mature. CSMA Striped Bass matured 0.5 years earlier compared to the ASMA/RRMA population. Fecundity ranged from 223,110 eggs for an Age-3 female to 3,273,206 eggs for an Age-10 female (Mean=769,048.54; SE=54,047.42; n=87). Fish in the CSMA produced more eggs than ASMA/RRMA Striped Bass when compared by age. Observed lengths at age were significantly different between the CSMA and ASMA/RRMA females (F=978.92; DF=1; p

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 An Evaluation of the Use of Bony Structures for Aging Albemarle Sound Roanoke River Striped Bass Morone Saxatilis written by Michael Humphreys and published by . This book was released on 1985 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Taxonomic Status and Reproduction of Striped Bass Morone Saxatilis in Florida written by James M. Barkuloo and published by . This book was released on 1970 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Striped bass from the Apalachicola and St. Johns Rivers in Florida were compared taxonomically with striped bass from other drainages on the Atlantic coast and Gulf of Mexico. Both rivers contain endemic striped bass populations. The Apalachicola River population was found to be a separate race. Sexually mature striped bass from the St. Johns were induced to spawn using hormonal injections. Few fry were produced due to extreme temperature fluctuations. Reproduction requirements and factors limiting the abundance of striped bass in Florida are discussed.

Download or read book Development of Fed and Starved Striped Bass Morone Saxatilis Larvae from the Roanoke River North Carolina written by Roger Allen Rulifson and published by . This book was released on 1986 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Sexual Maturity as Determined from Ovum Diameters in Striped Bass from North Carolina written by Robert M. Lewis and published by . This book was released on 1962 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sexual maturity of striped bass, Roccus saxatilis (Walbaum), was investigated in the Albemarle Sound-Roanoke River system of North Carolina during the periods October 1956 through January 1957, October 1957 through April 1958, and April through September 1960. A method which permitted the determination of maturity through the measurement of ova was used. Percentages of mature female fish during several months prior to spawning are given by age group. At age-group VII and older, there was evidence of intermittent spawning and the possibility of cessation.

Download or read book Reproductive Biology and Early Life History of Fishes in the Ohio River Drainage written by Robert Wallus and published by CRC Press. This book was released on 2006-06-02 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: This seven-volume series is the most extensive treatise on early life histories of the freshwater fishes of North America. It represents the state-of-the-art in fishery biology and provides a systematic approach to the study of early life histories of all the fishes in this region. Each volume contains distinguishing characteristics and a pictorial

Download or read book Genetic and Morphological Characterization of Striped Bass Morone Saxatilis Collected from the Roanoke River North Carolina During the 1999 Spawning Season written by Paula G. May and published by . This book was released on 2001 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Are Marine Migrations of Striped Bass Genetically Pre determined written by Wesley S. Patrick and published by . This book was released on 2010 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Striped bass, Morone saxatilis, is one of the most thoroughly studied anadromous fish species in the United States, with records governing the management of the species dating back to the late 1600s. However, management of this species has been difficult because of the species' anadromous behavior that takes it between fresh and marine waters, crossing numerous geopolitical boundaries. In the 20th century, the fishery experienced two dramatic declines in abundance. Studying the fishery after the declines resulted in major advancements in scientific understanding and management for this species, and striped bass is now an example of a successfully rebuilt fishery, key questions about population dynamics and migration patterns still persist. These unanswered questions reduce confidence in managing the species as a whole, and instead encouraging precautionary measures applied to small geographic areas, such as a natal river. This dissertation begins with a thorough review of the history of striped bass, including the key scientific findings and management measures instrumental in its recent recovery. Chapter 2 explores how scientists have approached the major challenge in striped bass management: defining the management unit so allocations can be made fairly and sustainably. The array of genetic techniques that have been employed, their limitations, and the populations studied with those techniques, is reviewed. Among the studies reviewed is one suggesting North Carolina striped bass migration may be genetically linked; this suggestion forms the basis for this dissertation's hypothesis. Answering this question can help resource managers better understand population dynamics, genetic interplay, and migration patterns - important for creating effective management and fair allocation between states. Chapter 3 explores the biotic and abiotic factors that can influence the results of an otolith microchemistry analysis, and Chapter 4 contains the discussion of the findings about the 112 striped bass examined. With biases accounted for, this dissertation concludes that marine migration was not linked to the genes examined. However, an interesting post-hoc observation can be made: though the behavior was not found to be genetically linked, striped bass in the first year of life proved to be residents, stagers, or sprinters, with different growth rates associated with these behaviors.

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.

Download or read book Effects of Flow and Temperature on Spawning Migration Behavior of Albemarle Sound Roanoke River Striped Bass written by Sss and published by . This book was released on 1995 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Natal Origin of Central Southern Management Area North Carolina Striped Bass Inferred from Otolith Microchemistry written by Jeffrey M. Dobbs and published by . This book was released on 2013 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Striped bass (Morone saxatilis) is an important commercial and game fish throughout North Carolina coastal waters. These fish have spawning populations present in all of the state's coastal rivers, however populations south of the Albemarle Sound in North Carolina have rarely been studied. These populations lie within North Carolina's immense Central Southern Management Area (CSMA). The CSMA stretches from the northernmost point of Pamlico Sound in the north down to the South Carolina border in the south. There are three main watersheds in the CSMA: the Tar/Pamlico River, the Neuse River, and the Cape Fear River. These rivers have spawning populations of striped bass, yet very few age 0 fish have been collected to support this in recent years. My study investigated the natal origin of CSMA striped bass through the use of water and otolith elemental analyses. Surface water samples and environmental data were collected once per month from 15 sample sites throughout the CSMA from May 2011 to July 2012. Two additional sample ponds from Edenton National Fish Hatchery were sampled once per week for two weeks in April 2012. Samples were analyzed for concentrations of calcium (Ca), strontium (Sr), magnesium (Mg), barium (Ba), and manganese (Mn) using an inductively-coupled plasma optical emission spectrometer. Concentrations were recorded as element to Ca ratios to account for the role of Ca in otolith deposition. Salinity differed significantly by location, while temperature and dissolved oxygen differed significantly by month and season. Only temperature differed significantly by year. All measured elements were consistently detected at every sample site. All measured elements differed significantly by location, but only Mn differd by month, season, and year. A multivariate classification of samples to their river of origin yielded only 42% success. When the classification was narrowed to include only one low salinity sample site per river, samples were classified to their sample site of origin with 82% accuracy. Fish (N=251) were collected from the Neuse and Tar/Pamlico rivers from April 2011 to April 2012. Fish total length (TL), total weight (TW), gonad weight, and liver weight were collected to calculate relative weight (Wr), liver somatic index (LSI), and gonadal somatic index (GSI). Otoliths were removed for ageing and elemental analysis. Elemental analysis was conducted by measuring concentrations of Sr, Mg, Mn, and Ba in the natal origin region of the otolith using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Condition of fish collected in the Neuse and Tar/Pamlico was sub-optimal. Fish GSI follow predictable yearly cycles, but were maturing a full year earlier than Roanoke River striped bass. Using the Sr signature from otolith elemental analysis, 88.4% of fish originated from the hatchery. Fish determined to be of natural origin were classified to their river of origin with 58.0% accuracy, and to their management area of origin with 84.0% accuracy. This study suggests that striped bass has become a put and take fishery in the Neuse and Tar/Pamlico rivers.