Download or read book Effective Strip Widths for Ship based Line transect Surveys of Cetaceans written by Jay Barlow and published by . This book was released on 2011 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Effective strip width is a key parameter in estimating abundance and density from line- transect surveys. Here we estimate effective strip widths for 58 categories (genera, species, subspecies, stocks, or other groups) of cetaceans based on 13,500 sightings from 32 line-transect surveys conducted in the eastern Pacific Ocean by the Southwest Fisheries Science Center from 1991 to 2008. Generalized linear models (GLMs) are used to first identify factors that are important in determining the perpendicular sigh ting distances using stepwise model selection based on AIC. Six species groups of similar taxa are created and modeled separately. Important factors for most species groups include Beaufort sea state, swell height, visibility, group size, species, and a survey-specific categorical variable (Cruise#). Interactions between species and the other factors generally do not improve GLM fits, indicating that the effects of those factors are relatively consistent for species within a species group. Factors selected for the best-fit GLMs are included as potential covariates in a line-transect model fit to a subset of the same data, again using stepwise model selection based on AIC. The best-fit line-transect models do not include Cruise# and are generally simpler than the GLMs, likely because distant sightings were eliminated by truncation. Species-specific differences in ESW are seen within the species groups indicating that species of cetacean do differ in the distances at which they can be detected, even after accounting for the effects of group size and other covariates that affect sighting distances. Results from this analysis of multiple surveys can be used to improve estimates of effective strip widths for any survey using the same methods and similar vessels. This is especially true for seldom-seen species whose abundance is difficult to estimate from a single survey"--Abstract.
Download or read book Marine Mammal Survey and Assessment Methods written by J.L Laake and published by CRC Press. This book was released on 2021-06-09 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume comprises the proceedings of a symposium on marine mammal survey assessment methods, which took place in Seattle, Washington, USA.
Download or read book Changes in Cetacean Abundance in California Coastal Waters written by Jay Barlow and published by . This book was released on 1993 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of Cetacean Research and Management written by and published by . This book was released on 2008 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment Approaches to Support Bycatch Management for Marine Mammals written by Tessa Francis and published by Frontiers Media SA. This book was released on 2022-06-21 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Introduction to Marine Mammal Biology and Conswervation written by Simmonds, M.P and published by Jones & Bartlett Publishers. This book was released on 2013 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: The charismatic mammals that live in the ocean are a constant source of interest, both for scientists and our society at large. Their biology, behavior, and conservation are of utmost importance, as a vast number of species are currently threatened. Intended for the upper-level undergraduate or graduate student within biology, marine biology, or conservation/environmental science, An Introduction to Marine Mammal Biology and Conservation provides a broad introduction to marine mammal biology using cutting edge information and student-friendly learning tools. The text begins with chapters on the evolution and classification of marine mammals and their general biology. It moves on to discuss the behavior and ecology of different groups of marine mammals, such as polar bears, otters, and cetaceans. Part 3 dives into many different conservation issues facing marine mammals, as well as discussions on how they can be addressed. Closing chapters provide information on how scientists study marine mammals, how society can enjoy observing the animals while making sure they are preserved, and a word to students looking to pursue a career with marine mammals.
Download or read book Federal Register written by and published by . This book was released on 2013-07 with total page 702 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 Whales Seals Fish and Man written by A. Schytte Blix and published by Elsevier. This book was released on 1995-10-06 with total page 735 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume outlines the major findings from the Norwegian research programme on whales and seals in Norwegian waters. A wide range of topics are covered, including physiological aspects, social organization, population dynamics, stock assessment and management. The book will be of great value to scientists and managers, as well as to members of the general public interested in environmental issues.
Download or read book A Review of Marine Mammal Census Methods written by Douglas George Chapman and published by . This book was released on 1977 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Small Cetacean Conservation Current Challenges and Opportunities written by Randall William Davis and published by Frontiers Media SA. This book was released on 2022-09-23 with total page 749 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Impacts of Shipping on Marine Fauna written by Christine Erbe and published by Frontiers Media SA. This book was released on 2020-10-23 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Download or read book Issues in Global Environment Biodiversity Resources and Conservation 2011 Edition written by and published by ScholarlyEditions. This book was released on 2012-01-09 with total page 1175 pages. Available in PDF, EPUB and Kindle. Book excerpt: Issues in Global Environment: Biodiversity, Resources, and Conservation: 2011 Edition is a ScholarlyEditions™ eBook that delivers timely, authoritative, and comprehensive information about Global Environment—Biodiversity, Resources, and Conservation. The editors have built Issues in Global Environment: Biodiversity, Resources, and Conservation: 2011 Edition on the vast information databases of ScholarlyNews.™ You can expect the information about Global Environment—Biodiversity, Resources, and Conservation in this eBook to be deeper than what you can access anywhere else, as well as consistently reliable, authoritative, informed, and relevant. The content of Issues in Global Environment: Biodiversity, Resources, and Conservation: 2011 Edition has been produced by the world’s leading scientists, engineers, analysts, research institutions, and companies. All of the content is from peer-reviewed sources, and all of it is written, assembled, and edited by the editors at ScholarlyEditions™ and available exclusively from us. You now have a source you can cite with authority, confidence, and credibility. More information is available at http://www.ScholarlyEditions.com/.
Download or read book Marine Mammal Ecology and Conservation written by Ian L. Boyd and published by Oxford University Press. This book was released on 2010-08-12 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much of our knowledge about marine mammals is derived from a long-term and dedicated research effort that is evolving rapidly due to the introduction and invention of new methods.This book reflects the inventiveness of marine researchers as they try to find ways around the problems presented to them by these unusual and challenging animals.
Download or read book Collected Reprints written by and published by . This book was released on 1992 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Collected Reprints written by Southwest Fisheries Center (U.S.) and published by . This book was released on 1987 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods and Applications of Statistics in the Atmospheric and Earth Sciences written by Narayanaswamy Balakrishnan and published by John Wiley & Sons. This book was released on 2012-11-19 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explore the classic and cutting-edge quantitative methods for understanding environmental science research Based on the multifaceted 16-volume Encyclopedia of Statistical Sciences, Second Edition, Methods and Applications of Statistics in the Atmospheric and Earth Sciences offers guidance on the application of statistical methods for conducting research in these fields of study. With contributions from more than 100 leading experts in academia and industry, this volume combines key articles from the Encyclopedia with newly developed topics addressing some of the more critical issues, including pollution, droughts, and volcanic activity. Readers will gain a thorough understanding of cutting-edge methods for the acquisition and analysis of data across a wide range of subject areas, from geophysics, geology, and biogeography to meteorology, forestry, agriculture, animal science, and ornithology. The book features new and updated content on quantitative methods and their use in understanding the latest topics in social research, including: Drought Analysis and Forecasting Childhood Obesity Ranked Set Sampling Methodology for Environmental Data Species Richness and Shared Species Richness Geographic Information Systems Each contribution offers authoritative yet easily accessible coverage of statistical concepts. With updated references and discussion of emerging topics, readers are provided with the various statistical methods, techniques, strategies, and applications that are essential for tackling critical issues in environmental science research. Featuring a balance of classical and cutting-edge methodologies, Methods and Applications of Statistics in the Atmospheric and Earth Sciences is an excellent resource for researchers, professionals, and students in the fields of sociology, psychology, philosophy, education, political science, and the related disciplines who would like to learn about the uses of statistics in gathering, reporting, and analyzing data.
