Download or read book Mortality Assessment of Atlantic Sea Scallops Placopecten Magellanicus from Gray meat Disease a Thesis in Marine Science and Technology written by Megan M. Levesque and published by . This book was released on 2016 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sea scallop (Placopecten magellanicus) fishery is the most valuable wild scallop fishery in the world. Landings are primarily' adductor muscles, which are ideally creamy white and firm. Recently, significant numbers of dark brown to gray, flaccid and stringy-meats, caused by an apicomplexan, have been caught in areas of Georges Bank and the mid-Atlantic, and are a concern for the industry and management. To investigate the impacts of this disease, a technique to isolate gray from white meat scallops using anesthesia was developed. A four-month laboratory study was conducted comparing mortality rates and shell height-meat weight ratios of healthy and diseased scallops. The density of parasites with decreased meat quality was quantified using histological analysis, and GIMP (GNU Image Manipulation Program) software.Furthermore, age and frequency of infestation by boring sponge (Cliona vastifica) and boring worm (Polydora sp.) were examined with their association to meat quality. Significantly higher mortality in gray-meat scallops compared to white-meat scallops correlated with an increase in the number of parasite nuclei and boring intensity. Additionally, smaller meat weights and extensive myodegeneration were observed with higher levels of infection. Based on these findings, it is important to consider diseased scallops in formulating applied harvestable biomass estimates and in future management strategies. Three general shell height-meat weight relationships are used in the stock assessment for sea scallops; however, a change in this relationship represents a change in biomass estimates. Gray-meat indicates imminent mortality, which also changes the estimate of natural mortality used in stock assessments. The frequency of diseased individuals affects the effort/day as well as the estimate of landings/day used to distribute allocations in the fishery. Understanding the impacts of this disease and how to manage the fishery in its presence is important for the future of the fishery.
Download or read book Prokaryotic Infection Associated with a Mass Mortality of the Sea Scallop Placopecten Magellanicus written by G. Gulka and published by . This book was released on 1983 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scallops Biology Ecology and Aquaculture written by Sandra E. Shumway and published by Elsevier. This book was released on 2011-09-22 with total page 1501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scallops are among the better known shellfish and are widely distributed throughout the world. They are of great economic importance, support both commercial fisheries and mariculture efforts and occupy a unique niche in the marine environment. Contributions from world leaders in scallop research and culture cover all facets of scallop biology including anatomy, taxonomy, physiology, ecology, larval biology and neurobiology. Chapters are also devoted to diseases and parasites, genetics, population dynamics and the adductor muscle, with extensive reference lists provided for each chapter. Since the publication of the first edition of Scallops: Biology, Ecology and Aquaculture in 1991, commercial interest in scallops has grown globally and this is reflected in the seventeen extensive chapters covering both fisheries and aquaculture for all species of scallops in all countries where they are fished or cultured. The Second Edition is the only comprehensive treatise on the biology of scallops and is the definitive reference source for advanced undergraduate and graduate students, mariculturists, managers and researchers. It is a valuable reference for anyone interested in staying abreast of the latest advances in scallops. * Offers over 30 detailed chapters on the developments and ecology of scallops* Provides chapters on various cultures of scallops in China, Japan, Scandinivia, Eastern North American, Europe, and Eastern North America* Includes details of their reproduction, nervous system and behavior, genetics, disease and parasites, and much more* Complete updated version of the first edition
Download or read book Fully protected Marine Reserves written by Callum M. Roberts and published by . This book was released on 2000 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book North Pacific Workshop on Stock Assessment and Management of Invertebrates written by Canada. Department of Fisheries and Oceans. Pacific Region and published by Department of Fisheries and Oceans, Information and Publications Branch. This book was released on 1986 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Various papers are presented on the topics of invertebrate management ingeneral; the sampling of adults, juveniles and larval forms;population dynamics and models; exploration and multispecies interactions;and management strategies. An overall workshop summary is included.
Download or read book Molluscan Shellfish Aquaculture A Practical Guide written by Sandra Shumway and published by 5m Books Ltd. This book was released on 2021-06-30 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molluscan Shellfish Aquaculture is a useable manual for all those interested in an up-to-date introduction to the field. Each of the major cultured species of commercial importance is covered, providing cutting-edge information of practical use to all those involved in shellfish aquaculture. The book’s editor and chapter authors are among the most widely known and respected authorities working in the industry and academia. Species covered include mussels, clams, oysters (including pearl oysters), scallops, cephalopods, abalone and gastropods. Molluscan Shellfish Aquaculture contains a huge wealth of information of great use for personnel working in the industry, with chapters covering site selection, hatchery construction, disease, biofouling, best management practice and certification. 5m Books
Download or read book Scallops written by Sandra E. Shumway and published by Elsevier. This book was released on 2016-06-07 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scallops: Biology, Ecology, Aquaculture and Fisheries, Third Edition, continues its history as the definitive resource on scallops, covering all facets of scallop biology, including anatomy, taxonomy, physiology, ecology, larval biology, and neurobiology. More than thirty extensive chapters explore both fisheries and aquaculture for all species of scallops in all countries where they are fished or cultured. This treatise has been updated to include the most recent advances in research and the newest developments within the industry. As aquaculture remains one of the fastest-growing animal food-producing sectors, this reference becomes even more vital. It has all the available information on scallops needed to equip researchers to deal with the unique global issues in the field. Offers 30 detailed chapters on the development and ecology of scallops Provides chapters on various cultures of scallops in China, Japan, Scandinavia, Europe, Eastern North America, and Western North America Includes details of scallop reproduction, nervous system, and behavior, genetics, diseases, parasites, and much more Completely updated edition with valuable information on one of the most widely distributed shellfish in the world
Download or read book Hatchery Culture of Bivalves written by Michael M. Helm and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2004 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: This manual is a synthesis of current methodologies pertinent to the intensive hatchery culture of bivalve molluscs. It encompasses both the similarities and differences in approach in rearing clams, oysters and scallops in different climatic zones. All aspects of the culture process are described, together with basic considerations in choosing a site for hatchery development and in the design of a suitable facility. It also includes the post-hatchery handling of larvae in remote setting and also of spat in both land- and sea-based nurseries. This document is intended to assist both technicians entering the field as well as entrepreneurs researching investment opportunities in bivalve culture.
Download or read book Expanding Mariculture Farther Offshore written by Alessandro Lovatelli and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2013 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is also recommended that efforts be increased to farm lower trophic levels species and optimize feeds and feeding in order to minimize ecosystems impacts and ensure long-term sustainability. Similarly, risk assessments and/or environmental impact assessment and monitoring must always be in place before establishing offshore farms, and permanent environmental monitoring must be ensured. All coastal nations should be prepared to engage actively in developing the technological, legal and financial frameworks needed to support the future development of offshore mariculture to meet global food needs. The workshop report highlights the major opportunities and challenges for a sustainable mariculture industry to grow and further expand off the coast.
Download or read book Marine Genetics written by Antonio M. Solé-Cava and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our current knowledge of marine organisms and the factors affecting their ecology, distribution and evolution has been revolutionised by the use, in the last 20 years, of molecular population genetics tools. This book is the result of a meeting of world-leading experts, in Rio de Janeiro, where the state of the art of this field was reviewed. Topics covered include the molecular analysis of bio-invasions, the recent developments in marine biotechnology, the factors affecting levels of genetic variation and population structure in marine organisms and their application to conservation biology, fisheries and aquaculture. This is the first book dedicated to the genetic study of marine organisms. It will be very useful to biology students, scientists and anyone working or simply interested in areas such as marine biology, zoology, ecology, and population and molecular genetics.
Download or read book Capture based Aquaculture written by Francesca Ottolenghi and published by Fao. This book was released on 2004 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The aim of this report is to define and review this "semi-aquaculture practice", which has been more accurately named "capture-based aquaculture." -- Preface.
Download or read book Emerging Marine Biotoxins written by Ana Gago-Mart´ınez and published by MDPI. This book was released on 2019-08-27 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The emergence of marine and freshwater toxins in geographical areas where they have never been reported before is a concern due to the considerable impact on (sea)food contamination, and consequently, on public health. Several groups of marine biotoxins, in particular tetrodotoxins, ciguatoxins, and palytoxins, are included among the relevant marine biotoxins that have recently emerged in several coastal areas. A similar situation has been observed in freshwater, where cyanobacterial toxins, such as microcystins, could end up in unexpected areas such as the estuaries where shellfish are cultivated. Climate change and the increased availability of nutrients have been considered as the key factors in the expansion of all of these toxins into new areas; however, this could also be due to more intense biological invasions, more sensitive analytical methods, or perhaps even an increased scientific interest in these natural contaminations. The incidences of human intoxications due to the consumption of seafood contaminated with these toxins have made their study an important task to accomplish in order to protect human health. This Special Issue has a focus on a wide variety of emerging biotoxin classes and techniques to identify and quantify them.
Download or read book Hazardous Chemicals Associated with Plastics in the Marine Environment written by Hideshige Takada and published by Springer. This book was released on 2018-10-13 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume consists of 15 chapters and focuses on hazardous chemicals, how they are associated with plastics, and their environmental risks. It includes background information on plastics and additives chemistry, and their observed or potential effects on living organisms as well as the oceanographic aspects of marine debris dispersion. The respective chapters provide insights into the sorption/desorption of chemicals in and out of plastics, the mechanisms and kinetics, but also the scale of the concentrations of chemicals found in marine debris, particularly in microplastics. The occurrence of the various chemicals is analyzed, as well as the distribution profiles of the chemicals in microplastics throughout the world’s oceans. The implications of the fact that plastics carry within them several chemicals are discussed in detail. In closing, new research topics that warrant further attention are identified. The book will appeal to all scientists who are already working or interested in starting to work on the topic of marine debris, as well as policymakers, NGOs and the broader informed public.
Download or read book Aquaculture Production Systems written by James H. Tidwell and published by John Wiley & Sons. This book was released on 2012-06-26 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aquaculture is an increasingly diverse industry with an ever-growing number of species cultured and production systems available to professionals. A basic understanding of production systems is vital to the successful practice of aquaculture. Published with the World Aquaculture Society, Aquaculture Production Systems captures the huge diversity of production systems used in the production of shellfish and finfish in one concise volume that allows the reader to better understand how aquaculture depends upon and interacts with its environment. The systems examined range from low input methods to super-intensive systems. Divided into five sections that each focus on a distinct family of systems, Aquaculture Production Systems serves as an excellent text to those just being introduced to aquaculture as well as being a valuable reference to well-established professionals seeking information on production methods.
Download or read book Diseases of Fish and Shellfish written by European Association of Fish Pathologists and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The History Present Condition and Future of the Molluscan Fisheries of North and Central America and Europe written by Clyde L. MacKenzie and published by . This book was released on 1997 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shellfish Processing and Preservation written by Nalan Gökoğlu and published by Springer Nature. This book was released on 2021-01-04 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shellfish is a broad term that covers various aquatic mollusks, crustaceans and echinoderms that are used as food. They have economic and ecological importance and have been consumed as food for centuries. Shellfish provide high quality protein with all the dietary amino acids essential for maintenance and growth of the human body. Shellfish are a major component of global seafood production, with shellfish aquaculture rapidly growing in recent years. There are many different processing methods used across the world. Shellfish are very perishable foods and must be preserved just after catching or harvesting. This makes the preservation of seafood a critical issue in terms of quality and human health. To date there have been a number of books on seafood processing and preservation, but all of them have been mostly focused on fish. Shellfish Processing and Preservation is the first reference work to focus specifically on shellfish, providing comprehensive coverage of the production methods, biological makeups and preservation methods of all major shellfish species. Individual sections focus on crustaceans such as shrimps and prawns, crabs and lobsters plus molluscans including mussels, scallops and oysters. Cephalopods such as squid and octopus are also covered in depth. For each species processing and preservation methods such as chilling, freezing, canning and curing are examined, plus the important safety aspects specific to each shellfish type. Shellfish Processing and Preservation is an essential publication for any researchers or industry professionals in search of a singular and up-to-date source for the processing and preservation of shellfish.
