Download or read book Spatial Variation in Fishery Exploitation of Mature Female Blue Crabs C Sapidus in Chesapeake Bay written by Corey Travis Corrick and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: From 2008 to 2012, the total U.S. commercial landings of blue crabs (Callinectes sapidus Rathbun, 1896) averaged over 173 million lbs. Chesapeake Bay and its tributaries are important contributors to this fishery, providing greater than 30% of national commercial landings annually. In Chesapeake Bay, C. sapidus exhibits a complex life cycle in which mated females migrate to the saline waters of the Bay mouth to spawn. During migration, females can traverse multiple management jurisdictions, complicating effective management of this important fishery. Sustained declines in harvest have led to management strategies focused on protecting the female spawning stock in an attempt to enhance recruitment back into the Bay. This study presents the results of a broad scale mark-recapture study (n=7,072) in 11 Chesapeake Bay subestuaries and one coastal embayment, designed to track female migration and quantify spatial variation in exploitation rates of mature female blue crabs. Tagging was conducted in fall 2014 (September and October), when most females have matured and begin to migrate to the spawning grounds, and in summer 2015 (July), when additional females mature and migrate to the spawning grounds. Approximately 8.1% of tagged females were recaptured within one year of release. Overall, the exploitation rate of the 2015 blue crab spawning stock in Chesapeake Bay was 10.5%; however exploitation varied widely among systems (4.0-28.5%). This estimate is below both the management target and threshold exploitation rates and the population grew in subsequent years, suggesting recruitment overfishing of blue crabs was not occurring in Chesapeake Bay at this time.
Download or read book Fluctuations in the Abundance of the Blue Crab in Chesapeake Bay written by John Cleary Pearson and published by . This book was released on 1948 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The blue crab (Callinectes sapidus Rathbun) of the Atlantic and Gulf coasts supports the largest crab fishery in the United States. Chesapeake Bay on the Atlantic coast and the estuarine waters of Louisiana on the Gulf coast now furnish 75 percent of the catch. Fluctuations in the abundance of blue crabs have occurred over the past half century in Chesapeake Bay where year-round fisheries have long been established. This report examines the nature and causes of fhese fluctuations. Several natural factors which appear to regulate the annual survival rate and the abundance of the blue crab are discussed on the basis of available knowledge.
Download or read book Variability in Size at Maturity of Female Blue Crab Callinectes Sapidus in Coastal South Carolina written by Michael Thienes and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Atlantic blue crab, Callinectes sapidus, supports the one of the largest fisheries in the United States. Despite the ecological and economic value of this species to South Carolina, many aspects of blue crab life history, which are important for ensuring effective management strategies, remain unexamined. Size restrictions for harvesting blue crabs were set nearly a century ago; however, size shifts in response to temperature can occur over contemporary timescales, and in the absence of direct climate studies, projected morphological responses to climate warming are typically based on latitudinal clines. Evidence of spatial and temporal variability for this species in both Atlantic and Gulf coast populations highlights the need for characterizing patterns of mature female blue crab demographics in South Carolina. This study incorporated a range of estuarine and marine environments from lower saline habitats and coastal spawning grounds to investigate spatial and temporal variation in female blue crab size. Long-term datasets were analyzed from 40 years (1979-2018) of fishery-independent estuarine trawl surveys and 30 years (1989 – 2018) of fishery-independent coastal trawl surveys conducted by the South Carolina Department of Natural Resources. Mixed-effects modelling procedures revealed significant spatial variability in mature female blue crab size in the southeastern U.S. Patterns in temporal trends across the time series were variable. These results provide detailed information on regional variability in female blue crab size, a life history trait that is central to effective management strategies for this species, and the applicability of latitudinal clines as a proxy for climate-induced changes in the size.
Download or read book Species Profiles written by Michael J. Van Den Avyle and published by . This book was released on 1984 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a species profile on the blue crab. Species profiles are literature summaries of the taxonomy, morphology, distribution, life history, habitats, and environmental requirements of coastal species of fishes and aquatic invertebrates. The blue crab occurs in lower reaches of freshwater rivers, estuaries, and coastal waters along the Atlantic seaboard and Gulf of Mexico.
Download or read book Stock Assessment of Chesapeake Bay Blue Crab Callinectes Sapidus written by and published by . This book was released on 1997 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synopsis of Biological Data on the Blue Crab Callinectes Sapidus Rathbun written by Mark R. Millikin and published by . This book was released on 1984 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Life History of the Blue Crab written by Edward Perry Churchill and published by . This book was released on 1919 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laws Regulations and Environmental Factors and Their Potential Effects on the Stocks and Fisheries for the Blue Crab Callinectes Sapidus in the Chesapeake Bay Region 1880 1940 written by W. A. Van Engel and published by . This book was released on 1999 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In the period 1880 to 1940, the blue crab fisheries of Chesapeake Bay evolved from a relatively small industry to one having a significant economic impact on watermen, processors and shippers, and the coastal communities, and the need for studied legislation and administration of the industry. The growth of the fishery resulted also in a need for well thought out science based on legislation and administration of the fishery. This text examines whether any of several variables had effects on the stocks and the successes or failures of the fisheries, with the aim of more informed planning of scientific studies, and recommendations to administrators"--Preface.
Download or read book Stock Enhancement and Sea Ranching written by Kenneth M. Leber and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collapse of many of the World’s fisheries continues to be of major concern and the enhancement of fish stocks through techniques such as ranching is of huge importance and interest across the globe. This important book, which contains fully peer reviewed and carefully edited papers from the 2nd International Symposium in Stock Enhancement and Sea Ranching is broadly divided into sections covering the following areas: The present situation of stock enhancement Seed quality and techniques for effective stocking Health management of hatchery stocks Methods for evaluating stocking effectiveness Population management in stock enhancement and sea ranching Management of stocked populations Ecological interactions with wild stocks Genetic management of hatchery and wild stocks Socio-economics of stock enhancement Case studies Stock Enhancement and Sea Ranching has been written and edited by some of the world’s foremost authorities in fisheries science and related areas and is essential reading for all fisheries scientists throughout the World. Fish biologists, marine and aquatic scientists, environmental biologists, ecologists, conservationists, aquaculture personnel and oceanographers will all find much of use and interest within this book. All libraries within universities and research establishments where these subjects are studied and taught should have copies of this book on their shelves.
Download or read book The Blue Crab written by Victor S. Kennedy and published by Maryland Sea Grant College University of Maryland. This book was released on 2007 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annotated Bibliography on the Fishing Industry and Biology of the Blue Crab Callinectes Sapidus written by Marlin E. Tagatz and published by . This book was released on 1971 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Changing Fecundity and Reproductive Output in Females of a Chesapeake Bay Population of Blue Crab Callinectes Sapidus written by Shannon L. Wells and published by . This book was released on 2009 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial Ecology of Blue Crab Callinectes Sapidus in Chesapeake Bay written by Olaf Peter Jensen and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Species Profiles written by Jennifer Hill and published by . This book was released on 1989 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Blue Crab and Its Fishery in Chesapeake Bay written by U.S. Fish and Wildlife Service and published by . This book was released on 1968 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Human Impacts on Salt Marshes written by Brian R. Silliman and published by Univ of California Press. This book was released on 2009-06-03 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Human Impacts on Salt Marshes provides an excellent global synthesis of an important, underappreciated environmental problem and suggests solutions to the diverse threats affecting salt marshes."—Peter B. Moyle, University of California, Davis
