Download or read book Scallop Mark recapture to Estimate Density Dependent Natural Mortality and Growth written by David B. Rudders and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural mortality, growth and movement are fundamental processes critical to understanding and describing population dynamics. These population characteristics not only inform and influence stock assessment models, but are also highly relevant with respect to the design and implementation of management strategies to meet fishery objectives. For many species, including sea scallops, these population parameters are difficult to measure due to the nature of the habitats inhabited and as a result, minimal information is often available. In many cases, what estimates do exist are highly uncertain as a result of both observation and process error. The uncertainty of these parameters is exacerbated for a species such as the sea scallop whose life history strategy is predicated on large, episodic recruitment events where natural mortality and growth may vary as a function of animal density. In 2015, resource surveys by the Virginia Institute of Marine Science (VIMS) and others observed what appeared to be an exceptionally large incoming year class of sea scallops throughout the Mid Atlantic Bight (MAB), with the locus of the event located in the Elephant Trunk Closed Area (ETCA). At the time of first encounter, these animals were roughly two years old and the scale of the event in terms of the spatial extent and magnitude was extensive. Multiple surveys delineated the distribution of the event and confirmed the enormous magnitude of scallops in the area, but critical questions remained. What is the survival rate of the unfished cohort (i.e. natural mortality rate)? What is their growth rate? Would the scallops survive? Would they grow at rates similar to what was expected? Would the animals move either inshore or offshore to a different habitat? To address these questions, we conducted a sea scallop mark-recapture study in the area of newly recruited scallops in the ETCA.
Download or read book Statistical Methods in Using Mark recapture Data for Population Estimation written by and published by . This book was released on 1967 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlantic Sea Scallop Fishery Fisheries Management Plan FMP written by and published by . This book was released on 1993 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oceanic Abstracts written by and published by . This book was released on 1997 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of the National Marine Fisheries Service for the Calendar Year written by United States. National Marine Fisheries Service and published by . This book was released on 1979 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Growth Rates and Recovery of Hatchery reared Sea Scallop Placopecten Magellanicus Gmelin 1791 Spat Under a Variety of Nursery Conditions written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Shellfish Research written by and published by . This book was released on 2000 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin Fisheries Research Board of Canada written by Fisheries Research Board of Canada and published by . This book was released on 1975 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computation and Interpretation of Biological Statistics of Fish Populations written by William Edwin Ricker and published by . This book was released on 2010-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Computation and Interpretation of Biological Statistics of Fish Populations, first published in 1975, deals with the general field of biological statistics of fish populations. It is a compilation of the more important procedures used to estimate abundance, age composition, rate of growth, and mortality rates in fish populations, with working examples of all the computations. Computation and Interpretation of Biological Statistics of Fish Populations is one of the most highly cited scientific references in the field of fisheries.
Download or read book Bulletin of the Fisheries Research Board of Canada written by and published by . This book was released on 1975 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Protected Areas written by National Research Council and published by National Academies Press. This book was released on 2001-06-01 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the ocean-and the resources within-seem limitless, there is clear evidence that human impacts such as overfishing, habitat destruction, and pollution disrupt marine ecosystems and threaten the long-term productivity of the seas. Declining yields in many fisheries and decay of treasured marine habitats, such as coral reefs, has heightened interest in establishing a comprehensive system of marine protected areas (MPAs)-areas designated for special protection to enhance the management of marine resources. Therefore, there is an urgent need to evaluate how MPAs can be employed in the United States and internationally as tools to support specific conservation needs of marine and coastal waters. Marine Protected Areas compares conventional management of marine resources with proposals to augment these management strategies with a system of protected areas. The volume argues that implementation of MPAs should be incremental and adaptive, through the design of areas not only to conserve resources, but also to help us learn how to manage marine species more effectively.
Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1995-05 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fisheries Research Bulletin written by and published by . This book was released on 1979 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecology Abstracts written by and published by . This book was released on 1997 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coverage: 1982- current; updated: monthly. This database covers current ecology research across a wide range of disciplines, reflecting recent advances in light of growing evidence regarding global environmental change and destruction. Major ares of subject coverage include: Algae/lichens, Animals, Annelids, Aquatic ecosystems, Arachnids, Arid zones, Birds, Brackish water, Bryophytes/pteridophytes, Coastal ecosystems, Conifers, Conservation, Control, Crustaceans, Ecosyst em studies, Fungi, Grasses, Grasslands, High altitude environments, Human ecology, Insects, Legumes, Mammals, Management, Microorganisms, Molluscs, Nematodes, Paleo-ecology, Plants, Pollution studies, Reptiles, River basins, Soil, TAiga/tundra, Terrestrial ecosystems, Vertebrates, Wetlands, Woodlands.
Download or read book Wildlife Demography written by John R. Skalski and published by Elsevier. This book was released on 2010-07-20 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wildlife Demography compiles the multitude of available estimation techniques based on sex and age data, and presents these varying techniques in one organized, unified volume. Designed to guide researchers to the most appropriate estimator based upon their particular data set and the desired level of study precision, this book provides quantitative consideration, statistical models, estimator variance, assumptions and examples of use. The authors focus on estimation techniques using sex and age ratios because this data is relatively easy to collect and commonly used by wildlife management. Applicable to a wide array of wildlife species, including game and non-game birds and mammals Features more than 100 annotated examples illustrating application of statistical methods Includes more than 640 references of the analysis of nontagging data and the factors that may influence interpretation Derives historical and ad hoc demographic methods in a modern statistical framework
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
