Download or read book Global Population Structure of Blue Whales Balaenoptera Musculus Ssp Based on Nuclear Genetic Variation written by Carole Anne Conway and published by . This book was released on 2005 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Diversity Structure and Historical Demography of Blue Whales Balaenoptera Musculus in the Southern Hemisphere written by Catherine Rita Maree Attard and published by . This book was released on 2013 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wild Blue written by Dan Bortolotti and published by Macmillan. This book was released on 2008 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beskriver blåhvalen ud fra en både videnskabelig og historisk vinkel. Indeholder beskrivelse af arterne, vandring, føde og de truede forhold blåhvalen lever under
Download or read book Population Trends of the Eastern North Pacific Blue Whale written by Cole Monnahan and published by . This book was released on 2013 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Blue whales (Balaenoptera musculus) were exploited extensively around the world and remain endangered. In the North Pacific their population structure is unclear and current status unknown, with the exception of a well-studied eastern North Pacific (ENP) population. Despite decades without whaling, recent abundance estimates for ENP blue whales indicate a slowed recovery, leading to speculation that their recovery may be hindered by fatal collisions with large vessels. I test this hypothesis by first estimating historical catches and then assessing the population trends with Bayesian population dynamics models under basic assumptions about historical and future ship strikes. I collated previously unreported Soviet catches and combined these with known catches to form the most current estimates of North Pacific blue whale catches. I used the knowledge that ENP whales produce a different song call than blue whales in the western North Pacific to split the conflated catches. The catches were split by estimating spatiotemporal occurrence of blue whales with generalized additive models fitted to acoustic call patterns, which predict the probability a catch belonged to the ENP population based on the proportion of calls of each population recorded by latitude, longitude, and month. When applied to the conflated historical catches, I estimate that ENP blue whale catches totaled 2,969 (95% credible interval 2,301 to 3,516) from 1905-1971, and amounted to 35% (95% credible interval 27% to 41%) of all catches in the North Pacific. The uncertainty in the acoustic data influence the results substantially more than uncertainty in catch locations and dates. These estimated catch series were then combined with abundance estimates and used to assess the recovery of ENP blue whales. I found the population has recovered to a median of 97% of pre-exploitation levels (credible interval 62% to 99%) and thus density dependence is primarily responsible for their slowed recovery. Further, current levels of ship strikes are not an immediate risk and thus ship strike mitigation would impact the population minimally. Indeed, vessel traffic would need to increase 3-5 times the current levels before the population is at risk. The recovery of ENP blue whale is a conservation success story and demonstrates that endangered cetacean populations can recover under careful management.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Exploration of Marine Biodiversity written by Carlos M. Duarte and published by . This book was released on 2006 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mariana Islands Range Complex written by and published by . This book was released on 2010 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reproductive Sciences in Animal Conservation written by Pierre Comizzoli and published by Springer Nature. This book was released on 2019-08-30 with total page 559 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition emphasizes the environmental impact on reproduction, with updated chapters throughout as well as complete new chapters on species such as sharks and rays. This is a wide-ranging book that will be of relevance to anyone involved in species conservation, and provides critical perspectives on the real utility of current and emerging reproductive sciences. Understanding reproductive biology is centrally important to the way many of the world’s conservation problems should be tackled. Currently the extinction problem is huge, with up to 30% of the world’s fauna being expected to disappear in the next 50 years. Nevertheless, it has been estimated that the global population of animals in zoos encompasses 12,000 – 15,000 species, and we anticipate that every effort will be made to preserve these species for as long as possible, minimizing inbreeding effects and providing the best welfare standards available. Even if the reproductive biology community cannot solve the global biodiversity crisis for all wild species, we should do our best to maintain important captive populations. Reproductive biology in this context is much more than the development of techniques for helping with too little or too much breeding. While some of the relevant techniques are useful for individual species that society might target for a variety of reasons, whether nationalistic, cultural or practical, technical developments have to be backed up by thorough biological understanding of the background behind the problems.
Download or read book Coastal Marine Ecosystems of Latin America written by U. Seeliger and published by Springer Science & Business Media. This book was released on 2000-10-18 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal and marine ecosystems, some severely degraded, other still pristine, control rich resources of inshore environments and coastal seas of Latin America's Pacific and Atlantic margins. Conflicts between the needs of the region's nations and diminishing revenues and environmental quality have induced awareness of coastal ecological problems and motivated financial support for restoration and management. The volume provides a competent review on the structure, processes and function of 22 important Latin American coastal marine ecosystems. Each contribution describes the environmental settings, biotic components and structure of the system, considers trophic processes and energy flow, evaluates the modifying influence of natural and human perturbations, and suggests management needs. Although the focus of the book is on basic ecological research, the results have application for coastal managers.
Download or read book Environmental Science a Canadian Perspective written by Bill Freedman and published by Prentice Hall. This book was released on 2006 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diablo Canyon Units 1 2 Continued Construction written by and published by . This book was released on 1973 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Ecology written by Joanna R. Freeland and published by John Wiley & Sons. This book was released on 2006-03-30 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecular Ecology provides a comprehensive introduction to the many diverse aspects of this subject. The book unites theory with examples from a wide range of taxa in a logical and progressive manner, and its accessible writing style makes subjects such as population genetics and phylogenetics highly comprehensible to its readers. The first part of the book introduces the essential underpinnings of molecular ecology, starting with a review of genetics and a discussion of the molecular markers that are most frequently used in ecological research. This leads into an overview of population genetics in ecology. The second half of the book then moves on to specific applications of molecular ecology, covering phylogeography, behavioural ecology and conservation genetics. The final chapter looks at molecular ecology in a wider context by using a number of case studies that are relevant to various economic and social concerns, including wildlife forensics, agriculture, and overfishing * comprehensive overview of the different aspects of molecular ecology * attention to both theoretical and applied concerns * accessible writing style and logical structure * numerous up-to-date examples and references This will be an invaluable reference for those studying molecular ecology, population genetics, evolutionary biology, conservation genetics and behavioural ecology, as well as researchers working in these fields.
Download or read book The Stocks of Whales written by Neil Alison Mackintosh and published by . This book was released on 1965 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evolution of the Vertebrate Ear written by Jennifer A. Clack and published by Springer. This book was released on 2016-12-21 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: The evolution of vertebrate hearing is of considerable interest in the hearing community. However, there has never been a volume that has focused on the paleontological evidence for the evolution of hearing and the ear, especially from the perspective of some of the leading paleontologists and evolutionary biologists in the world. Thus, this volume is totally unique, and takes a perspective that has never been taken before. It brings to the fore some of the most recent discoveries among fossil taxa, which have demonstrated the sort of detailed information that can be derived from the fossil record, illuminating the evolutionary pathways this sensory system has taken and the diversity it had achieved.
Download or read book Contributions to the Fauna of South Georgia written by Einar Lönnberg and published by . This book was released on 1906 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wild Blue written by Dan Bortolotti and published by Macmillan. This book was released on 2008-10-14 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: The blue whale holds the title of largest creature that has ever lived, and it may also be the most mysterious. The biggest blue whales can outweigh every player in Major League Baseball and the National Hockey League combined. Their mouths can gulp more than thirteen thousand gallons of seawater. A newborn can be over twenty feet long and gain nearly twenty tons in seven months—about eight pounds per hour. Blue whales emit more powerful sounds than any other animal on earth, though many of their vocalizations are beyond the range of human hearing. Yet nearly everything that we have learned about blue whales has come after humans almost wiped them out from the oceans. A century ago, some three hundred thousand roamed the seas. But in the first decades of the twentieth century, humans hunted and killed 99.9% of them. Their numbers decimated, the species seemed destined for extinction. Only in recent years has the number slowly begun to increase, along with hope for the blue whale's future. Equal parts history and science, Wild Blue is the first comprehensive portrait of the blue whale. It draws upon new findings from scientists who have begun to identify individual blue whales and understand how they dive, how they feed, where they migrate, and why they emit their haunting, low-frequency calls. With deft, poignant writing, Dan Bortolotti gives us the most vibrant, breathtaking view to date of these magnificent creatures.
Download or read book Plastics in the Aquatic Environment Part I written by Friederike Stock and published by Springer Nature. This book was released on 2021-10-29 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a comprehensive review of how plastic pollution is affecting fresh and marine waters, and what the current challenges in plastic waste assessment and management in the aquatic environment are. Plastic waste comprises particles with heterogeneous physicochemical properties such as large size-range, different shapes and polymer types with various additives determining their environmental fate and risk. This complexity raises several open research questions which are explored in this book. Examples are the plastic uptake by aquatic organisms, degradation processes as well as sources and sinks in the environment. Readers will discover real case studies of plastic pollution detection and management in different parts of the world, including Asia, America and Europe, which provide an integrated overview of the global scope of this issue. This book and the companion volume Plastics in the Aquatic Environment - Part II: Stakeholders' Role Against Pollution are valuable resources to students, researchers, policymakers and environmental managers interested in plastic pollution and working towards its reduction.
