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Book Red Drum Sciaenops Ocellatus Tagging in North Carolina Waters

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:

Book A Synthesis of Red Drum Feeding Ecology and Diets from North Carolina and South Carolina

Download or read book A Synthesis of Red Drum Feeding Ecology and Diets from North Carolina and South Carolina written by Tyler Peacock and published by . This book was released on 2014 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: The trophic interactions of the red drum Sciaenops ocellatus have been previously researched. However diet data on the largest adults (>750mm TL) are very limited. As fisheries management moves towards a goal of multi-species and ecosystem-based strategies, information on trophic inter-relationships of the system must be characterized for effective understanding and application to future modelling efforts and management decisions. Predatory effects on forage species are an important component of this, and examining the diet of the predator is the most efficient way to identify prey species interactions and potential removal rates through predation mortality. Red drum abundance has increased since the implementation of more conservative management strategies and major decreases in commercial fishing effort on the species. Because of these changes in abundance and the lack of diet data for larger adult red drum, this study was conducted to identify the trophic relationships and potential forage species effects of these predators. This study will 1) Identify, classify, and compare diets of large adult red drum in North Carolina and South Carolina and 2) synthesize a pooled standardized diet composition from all previously published red drum diet studies across its range (excluding larvae). First, the trophic relationships of large adult red drum (>750mm TL), Sciaenops ocellatus, in the coastal waters of South Carolina (N=146) and North Carolina (N=51), from 2007-2011 were examined. Stomach samples were collected by North Carolina Division of Marine Fisheries and South Carolina Department of Natural Resources during their annual fall longline surveys. Red drum in North Carolina fed predominantly on blue crab (Callinectes sapidus) which made up 51% of the diet by number and occurred in 48% of the stomachs. The diet of red drum in South Carolina was more diverse that in North Carolina, where red drum consumed mostly Atlantic menhaden (Brevoortia tyrannus) and a diverse group of marine decapods and brachyurans. Prey species contribution varied between years, with increases in blue crab in North Carolina red drum and Atlantic menhaden for South Carolina red drum. The differences in diet between the states are likely because of prey assemblage differences between the predominantly estuarine habitat in North Carolina and the coastal marine habitat in South Carolina. Although the diet composition of red drum was different between SC and SC they fed at similar trophic levels. Secondly, ten previously published diet studies on red drum (excluding larval diets) were collected via a thorough literature search and diet data were pooled by prey group and size-class of the predator. Standardized diet compositions were examined and analyzed by cluster analysis to determine groupings of similarity. Juvenile and sub-adult red drum had very similar diets on each coast, feeding on mysids, shrimp, and crabs, which was attributed to their inhabiting similar nursery areas. Adult red drum diets were similar, feeding mostly on fish and crabs. This was attributed to adults residing in coastal waters instead of the inshore nursery areas. This study has made the adult diet of red drum and a large-scale diet characterization of the species available for application to future management.

Book Life history Characteristics and Fishery Dynamics of Red Drum Sciaenops Ocellatus in the North central Gulf of Mexico

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

Book Fishery Bulletin

Download or read book Fishery Bulletin written by and published by . This book was released on 1998 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Atlantic Coast Red Drum Fisheries Management Plan FMP

Download or read book Atlantic Coast Red Drum Fisheries Management Plan FMP written by and published by . This book was released on 1990 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Factors Influencing the Mortality and Distribution of Subadult Red Drum in North Carolina

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.

Book A Biological and Fisheries Profile of Red Drum Sciaenops Ocellatus

Download or read book A Biological and Fisheries Profile of Red Drum Sciaenops Ocellatus written by Linda Pushee Mercer and published by . This book was released on 1984 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Recruitment of Stocked Juvenile Red Drum Sciaenops Ocellatus to the Adult Population in South Carolina

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.

Book Species Profiles

Download or read book Species Profiles written by Dennis R. Lassuy and published by . This book was released on 1983 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Calico Scallop Fishery and Sargassum Habitat Fishery

Download or read book Calico Scallop Fishery and Sargassum Habitat Fishery written by and published by . This book was released on 1998 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book NOAA Technical Report NMFS

Download or read book NOAA Technical Report NMFS written by and published by . This book was released on 1984 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Marine Aquaculture

Download or read book Marine Aquaculture written by National Research Council and published by National Academies Press. This book was released on 1992-02-01 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal farming and ocean ranching of marine fish, shellfish, crustaceans, and seaweed are a major and growing industry worldwide. In the United States, freshwater aquaculture is rapidly becoming a significant commercial activity; however, marine aquaculture has lagged behind. This book examines the obstacles to developing marine aquaculture in the United States and offers specific recommendations for technology and policy strategies to encourage this industry. The volume provides a wealth of information on the status of marine aquacultureâ€"including comparisons between U.S. and foreign approaches to policy and technology and of the diverse species under culture. Marine Aquaculture also describes problems of coordination of regulatory policy among various federal, state, and local government agencies and escalating competition for the use of coastal waters. It addresses environmental concerns and suggests engineering and research strategies for alleviating negative impacts from marine aquaculture operations.