Download or read book Population Modeling of Red Drum Sciaenops Ocellatus in South Carolina Waters written by Robert James Latour and published by . This book was released on 2000 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessing the Genetic Influences of Red Drum Sciaenops Ocellatus Stock Enhancement in South Carolina written by Christopher Mealey and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The South Carolina Department of Natural Resources began a stock enhancement research program for red drum Sciaenops ocellatus to explore stock enhancement as a potential management tool in addition to restrictive fishing regulations by augmenting the abundance of juveniles available for recreational harvest in SC estuaries. Stock enhancement has been historically criticized for its potential to decrease genetic diversity and increase levels of inbreeding in the wild population. Between 1999 and 2011, approximately six million juvenile red drum and 100 million larvae were stocked into the Charleston Harbor estuary. Standardized sampling of sub-adults within the estuary (total N=3,361), as well as the spatially separate offshore adult population (total N=796) found proportions of stocked fish as high as 49.6% within a single year-class and up to 12% within the local spawning population, respectively. This study evaluated the genetic influences of stock enhancement on the wild adult population by calculating a suite of genetic diversity metrics using microsatellite loci, and then utilized these metrics to validate an individual-based model (IBM) to forecast the genetic influences of future stocking strategies in SC. No statistically significant differences were found among year-classes (sub-adult samples) or collection years (adult samples) for any genetic diversity metric, suggesting that responsible stocking of red drum as small juveniles has not altered the genetic diversity among wild adults in SC. Simulations monitored changes in genetic diversity under several stocking scenarios, which included: the effective number of breeders in the hatchery (2, 6, and 10), the contribution of stocked fish to each year-class in the wild (30, 60 and 90%), and the census size of the wild adult population (500, 5,000 and 50,000). The IBM accurately simulated empirical estimates of genetic diversity from 1999 to 2011, and could therefore inform responsible stocking strategies for continued red drum stocking efforts in South Carolina.

Download or read book Red Drum Sciaenops Ocellatus Tagging in North Carolina Waters written by Jeffrey L. Ross and published by . This book was released on 1987 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fishery Bulletin written by and published by . This book was released on 2001 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Capture Recapture Analysis written by Steven C. Amstrup and published by Princeton University Press. This book was released on 2010-12-16 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every day, biologists in parkas, raincoats, and rubber boots go into the field to capture and mark a variety of animal species. Back in the office, statisticians create analytical models for the field biologists' data. But many times, representatives of the two professions do not fully understand one another's roles. This book bridges this gap by helping biologists understand state-of-the-art statistical methods for analyzing capture-recapture data. In so doing, statisticians will also become more familiar with the design of field studies and with the real-life issues facing biologists. Reliable outcomes of capture-recapture studies are vital to answering key ecological questions. Is the population increasing or decreasing? Do more or fewer animals have a particular characteristic? In answering these questions, biologists cannot hope to capture and mark entire populations. And frequently, the populations change unpredictably during a study. Thus, increasingly sophisticated models have been employed to convert data into answers to ecological questions. This book, by experts in capture-recapture analysis, introduces the most up-to-date methods for data analysis while explaining the theory behind those methods. Thorough, concise, and portable, it will be immensely useful to biologists, biometricians, and statisticians, students in both fields, and anyone else engaged in the capture-recapture process.

Download or read book Factors Influencing the Mortality and Distribution of Subadult Red Drum in North Carolina written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Subadult red drum Sciaenops ocellatus are ecologically and economically important in North Carolina, but little is known about factors influencing their mortality and distribution in estuaries. I first assessed the effect of fishing on red drum abundance using 24 years of tagging data. The tag-return model incorporated all first returns from fish caught-and-released and accounted for age-dependent selectivities that varied by fate of the fish. Estimated fishing mortality rates (F) were high and variable before regulation changes in 1991, but decreased in magnitude and variability after 1991. A dome-shaped selectivity pattern was estimated to account for migration of older fish into coastal waters. To quantify the natural mortality rate and seasonal Fs for red drum, I conducted the first field test of a combined telemetry - tag return approach. Estimated Fs were similar in seasonal pattern and magnitude between tagging and telemetry, but joint estimates were influenced primarily by tagging. Natural mortality rate was low and influenced primarily by telemetry. The combined approach provides a new tool to estimate mortality rates for myriad fish species. Next, habitat use of subadult red drum was quantified with a combination of fishery-independent sampling, telemetry, and generalized additive models. At a large scale, red drum were associated with shallow, nearshore waters, sometimes with seagrass. To determine the influence of prey, I examined red drum stomachs and used generalized additive models to relate physicochemical and prey attributes to telemetered red drum at a small scale. Telemetered red drum were negatively related to salinity and positively related to dissolved oxygen and total prey. Last, I used tagging and telemetry to quantify the large- and small-scale movements of subadult red drum. Movement rates and directions were influenced by age of fish and region and season of tagging, and suggest that the spatial scale of management and regulations cu.

Download or read book Fly Fishing for Redfish written by Chico Fernández and published by Stackpole Books. This book was released on 2015-09-15 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: If you're looking to spend some time chasing one of the Atlantic's most popular sport fish, this book can help make it time well spent. Chico Fernández shares a lifetime of expertise and experiences fly fishing for redfish up and down the Atlantic Coast, Florida, Louisiana, Texas, and Mexico. • The quintessential book on redfish by the author of the quintessential book on bonefish • Complete with Aaron Adams's informative science on the fish's lifecycle, habitats, tides, and foods • Covers the essentials of fishing and tying for redfish: rods, reels, rigs, casting techniques, and flies

Download or read book Recruitment of Stocked Juvenile Red Drum Sciaenops Ocellatus to the Adult Population in South Carolina written by Joy Gerhard and published by . This book was released on 2010 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Red drum (Sciaenops ocellatus) is a popular food and recreational fishery species along the southeast U.S. and Gulf of Mexico coasts. Although contribution of stocked fish to the wild population in South Carolina has been measured immediately following stocking up to age two, evaluation of stocked fish recruitment to the adult population has not yet been examined and therefore is the focus of this research. Small juveniles (~30 mm TL) were stocked in the Ashley and Wando Rivers of Charleston Harbor in 1999 - 2002 by the South Carolina Department of Natural Resources (SCDNR). Five years after initial stocking (2004 - 2008), adults were sampled via longline nearshore of four major South Carolina estuaries, and tissue samples were collected for genetic analysis. Genotypes of sampled fish were compared to those of broodstock and it was determined that small stocked juveniles do recruit to the adult stock in South Carolina, with a highly localized contribution near Charleston Harbor. Contribution of the identified stocked fish was estimated via several different methods. Contribution to the stocked year classes in particular were estimated by using length data as well as otolith-based age data collected before and during the sampling period. The percentage of the Charleston Harbor adult population identified as stocked fish from three stocked year classes ranged from 5.8% to 66.0% with the most preferred method, using age-length keys, yielding a contribution estimate of 34.9%. Such a high contribution has the potential to cause deleterious genetic and reproductive effects, though the broodstock husbandry and stocking protocol used by SCDNR is designed to minimalize these effects. Additionally, contribution of this magnitude might allow stocked fish to be used as biomarkers to gain a better understanding of the basic population parameters of adults in South Carolina for management.

Download or read book Management Techniques for Elasmobranch Fisheries written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2005 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Elasmobranch - describes a group of fish without a hard bony skeleton, including sharks, skates, and rays.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2009 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Structure of Red Drum Sciaenops Ocellatus as Determined by Otolith Chemistry written by H. M. Patterson and published by . This book was released on 2003 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aspects of the Biology of Juvenile Red Drum Sciaenops Ocellatus and Spotted Seatrout Cynoscion Nebulosus Pisces Sciaenidae in South Carolina written by Louis Broaddus Daniel and published by . This book was released on 1988 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biology of the Spotted Seatrout written by Stephen A. Bortone and published by CRC Press. This book was released on 2002-07-30 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: The spotted seatrout is an important species not only for recreational and commercial fisheries, but also as an integral part of many estuarine ecosystems. As one of the few fishes that live its entire life within an estuarine system, the species has tremendous potential as a monitor or sentinel for estuarine conditions. Prepared by the foremost au

Download or read book Patterns and Mechanisms of Size dependent Overwinter Mortality in Juvenile Red Drum Sciaenops Ocellatus written by Deena A. Anderson and published by . This book was released on 2013 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Summary of the North Carolina Red Drum Sciaenops Ocellatus Commercial Fishery written by Stephanie McInerny and published by . This book was released on 2009 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fishery Science written by Lee A. Fuiman and published by John Wiley & Sons. This book was released on 2009-02-12 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now clear that data based on the studies of fish eggs and larvae make a number of unique contributions to fishery science that are crucial for accurate assessment and management of fish populations, including those of commercially important fisheries. This valuable book demonstrates why fish eggs and larvae are important, how the characteristics of early life stages require a somewhat different research approach and how information on early life stages can be applied and interpreted to yield unique insights into fish populations. The editors of Fishery Science have drawn together an extremely useful and well-written book with contributions from internationally respected researchers from North America, Asia and Europe. Chapters include a discussion of the unique nature of early life stages, age and growth, mortality, recruitment, populations analysis, habitats, human impacts and management. A carefully selected set of case studies demonstrates several specific applications of early life history information to a number of fishery problems. Fishery Science was designed to complement existing textbooks and is an essential purchase for all fisheries students and professionals, and for biologists working on the early life stages of fish. This exciting book is also of great value to ecologists, marine, freshwater and environmental scientists, populations biologists and oceanographers. All libraries in universities and research establishments where biological and fishery science are studied and taught should have copies of this book available on their shelves.

Download or read book Life history Characteristics and Fishery Dynamics of Red Drum Sciaenops Ocellatus in the North central Gulf of Mexico written by Corbin Frank Bennetts and published by . This book was released on 2018 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Red drum (Sciaenops ocellatus) are highly targeted recreationally in the Gulf of Mexico, and support a small commercial fishery in Mississippi. Despite their popularity, the stock is assessed using data limited approaches that necessitate accurate life history information. I estimated the year-specific and year-aggregated escapement rates for the Mississippi stock (years 2004 to 2015), which were sensitive to mortality estimation methods; year-aggregated estimates were 6.9 to 28.2 % depending on the method, but temporal patterns were consistent. I then addressed concerns with previously estimated life-history characteristics by describing the sex-specific growth and reproductive dynamics. The three-parameter von Bertalanffy growth function was the best candidate length-at-age model, with no significant difference in overall growth between sex-specific relationships, but females had a larger mean asymptotic length, and four candidate models showed significant sexual dimorphism. I described Red Drum as batch spawners, with 3.7 days between successive spawns during the spawning season (August and September). The age at 50% maturity was around age-3 y in both sexes, but spawning capability was not evident until around age-6 y. The carbon (delta C-13) and nitrogen (delta N-15) stable isotope composition of Red Drum muscle tissue was more enriched in carbon offshore and was significantly different with respect to reproductive phase. Mean and variance of delta N-15 and variance of delta C-13 was significantly different between fish