Download or read book Population Genetics of Hudson Bay Beluga Whales Delphinapterus Leucas written by Samuel John Mancuso and published by . This book was released on 1995 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Genetic Structure of Beluga Whales Delphinapterus Leucus written by Ree Brennin and published by . This book was released on 1992 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Genetic Structure and Habitat Use of the St Lawrence Beluga Whale Delphinapterus Ieucas written by Mubrouka M. Elharram and published by . This book was released on 2011 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genetic Diversity Population Structure and Phylogeography Among Belugas Delphinapterus Leucas in Canadian Waters written by Lianne Postma and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis examines the genetic diversity, population structure and phylogeography of belugas (Delphinapterus leucas) in Canadian waters that encounter multiple stressors throughout their seasonal distributions. Data were collected from multiple scales, including: samples covering a temporal scale of 25 years; broad geographic comparisons to finer-scale, within-group comparisons; and varying amounts of genetic information from partial mtDNA sequences to whole mitogenome sequences, and multiple nuclear microsatellite loci. At least nine genetically distinct summer aggregations, with an additional distinct winter sample collection of unknown summer distribution, were identified. This information contributed to the identification of Designatable Units (DUs) of belugas for future assessments by the Committee on the Status of Endangered Wildlife in Canada (COSEWIC). Phylogenetic analyses of mtDNA sequences revealed that the most divergent lineages are found at the east, west and southern edges of the Canadian distribution, with the central area characteristic of a contact zone displaying an admixture of lineages marked by incomplete lineage sorting. The geographic distribution of these lineages suggests multiple glacial refugia as sources of ancestral beluga populations that recolonized Canadian Arctic and sub-Arctic waters. Preliminary tests of selection detected the presence of purifying selection on all mtDNA protein-coding genes of belugas. However, no signals of adaptive selection were detected among genetic lineages or geographic groups. Within nearshore summer aggregations of Beaufort Sea belugas, three distinct maternal lineages were identified and patterns of genetic relatedness suggest clusters of related females form in the overall area. However, these clusters of related belugas did not form fine-scale kin structure corresponding to aggregation/harvesting locations. Thus, disturbances and subsistence harvesting in particular areas where belugas are aggregating will not be necessarily putting a discrete genetic unit of the stock at risk. These results provide a better understanding of the diversity and spatial differentiation among and within Canadian beluga stocks, inferences about past responses to climate changes, approaches to investigate fine-scale structure within seasonal aggregations, and new tools to infer adaptive potential of these whales. This information, and studies of beluga fossils plus additional samples across global distributions, will improve conservation and management planning for this culturally important and charismatic species.

Download or read book Use of DNA Microsatellites in Beluga Whale Delphinapterus Leucas Population Genetics written by L. D. Maiers and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies of White Whales Delphinapterus Leucas and Narwhals Monodon Monoceros in Greenland and Adjacent Waters written by and published by Museum Tusculanum Press. This book was released on 1994 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Stock Definition and Genetic Composition of Cumberland Sound Beluga Whales Delphinapterus Leucas written by Cortney A. Watt and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Ecology of Whales and Dolphins written by David Edward Gaskin and published by Heinemann Educational Books. This book was released on 1982 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Population biology of Cetacea. Includes bibliographies relating to each chapter.

Download or read book Use of DNA Microsatellites in Beluga Whale Delphinapterus Leucas Population Genetics written by Canada. Department of Fisheries and Oceans. Central and Arctic Region and published by Department of Fisheries and Oceans, Central and Arctic Region. This book was released on 1996 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reproductive Biology and Phylogeny of Cetacea Whales Porpoises and Dolphins written by Debra Lee Miller and published by CRC Press. This book was released on 2016-04-19 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: The order Cetacea comprises some amazing species, representing some of the most evolved creatures that inhabit this earth. Yet, they also represent a group of species for which much remains unknown. There are over 80 species of cetaceans composed of porpoises, dolphins and whales. This volume represents the latest of published and previously unpubl

Download or read book A Little Less Arctic written by Steven H. Ferguson and published by Springer Science & Business Media. This book was released on 2010-05-30 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Arctic Canada, Hudson Bay is a site of great exploration history, aboriginal culture, and a vast marine wilderness supporting large populations of marine mammals and birds. These include some of the most iconic Arctic animals like beluga, narwhal, bowhead whales, and polar bears. Due to the challenges of conducting field research in this region, some of the mysteries of where these animals move, and how they are able to survive in such seemingly inhospitable, ice-choked habitats are just now being unlocked. For example, are polar bears being replaced by killer whales? This new information could not be more salient, as the Hudson Bay Region is undergoing rapid environmental change due to global warming, as well as increased pressures from industrial development interests. A Little Less Arctic brings together some of the world’s leading Arctic scientists to present the current state of knowledge on the physical and biological characteristics of Hudson Bay.

Download or read book An Investigation of Nuclear DNA Markers for Beluga Whale Delphinapterus Leucas Population Genetics microform written by Lianne Dawn Postma and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1995 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Structure and Group Relatedness of Bottlenose Dolphins Tursiops Truncatus in the Coastal Gulf of Mexico Using Mitochondrial DNA and Nuclear Microsatellite Markers written by Anna B. Sellas and published by . This book was released on 2002 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Investigation of Nuclear DNA Markers for Beluga Whale Delphinapterus Leucas Population Genetics written by Lianne Dawn Postma and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phylogeography written by John C. Avise and published by Harvard University Press. This book was released on 2000-01-03 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phylogeography is a discipline concerned with various relationships between gene genealogies—phylogenetics—and geography. This book captures the conceptual and empirical richness of the field, and also the sense of genuine innovation that phylogeographic perspectives have brought to evolutionary studies.

Download or read book Identifying and Comparing Important Areas for Marine Sustainable Use and Conservation written by Sofie Van Parijs and published by Frontiers Media SA. This book was released on 2024-05-24 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ocean is under increasing threat from the expansion of human activities. The combined impacts of these threats as well as the potential impacts of climate change and ocean acidification have placed thousands of species at risk of extinction, and have impaired the structure, function, productivity and resilience of marine ecosystems. Currently, some parts of the world's oceans are significantly impacted, yet are without any form of effective management. Only a small proportion of the oceans are within protected area systems. Globally, measures are being taken to increase protection and sustainable management, but application is uncoordinated and not always effective. In order to support effective policy action by countries and competent international and regional organizations, it is critical to build a sound understanding of the most ecologically and biologically important ocean areas that support healthy marine ecosystems so that the necessary steps to ensure the long-term function and resilience of these systems can be taken.

Download or read book Reproductive Biology and Phylogeny of Chondrichthyes written by William C. Hamlett and published by CRC Press. This book was released on 2011-10-14 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internal fertilization is universal in chondrichthyan fishes and, as such, requires a suite of biological activities, including behavioral, morphological and physiological mechanisms, to ensure successful copulation and fertilization. This volume correlates available data and ideas concerning the development, reproductive morphology, function, and