Download or read book Distribution Abundance and Behaviour of White Whales in the MacKenzie Estuary written by Humphrey B. and published by . This book was released on 1986 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distribution Abundance and Behaviour of White Whales in the Mackenzie Estuary written by P. Norton and published by . This book was released on 1986 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents results of aerial reconnaissance surveys of the white whale population of the Mackenzie River estuary from 1976 to 1985. Information is included on survey and data analysis methods, and on whale distribution and abundance (focusing on the 1985 survey), whale behaviour, and neonate sightings. Concludes with discussion on the timing and pattern of white whale movement and distribution, possible biases in survey technique, yearly trends in whale abundance, whale uses of the estuary, and effects of industrial activities on white whales.

Download or read book Distribution Abundance and Behaviour of White Whales in the MacKenzie Estuary written by and published by . This book was released on 1986 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book White Whale Delphinapterus Leucas Distribution and Abundance and the Relationship to Physical and Chemical Characteristics of the Mackenzie Estuary written by Canada. Department of Fisheries and Oceans. Western Region and published by Fisheries and Marine Service [i.e. Department of Fisheries and Oceans]. This book was released on 1979 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Beluga Whale Habitat Selection and Distribution in the Mackenzie Estuary and the Tarium Niryutait Marine Protected Area written by Aurelie Noel and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Eastern Beaufort Sea (EBS) beluga population migrates to the Mackenzie Estuary and to the Tarium Niryutait Marine Protected Area every summer and the reasons behind this selection are not fully understood. Once in the Estuary, beluga whales (Delphinapterus leucas) are harvested by Inuvialuit communities of the Inuvialuit Settlement Region for whom they represent an essential country food, contributing to their well-being. In the last decade, community members voiced their concerns and identified research priorities pertaining to belugas resources, baselines and habitats. To enhance our understanding of EBS beluga whale habitat and further anticipate effects of a changing climate, it was crucial to understand why belugas select these habitats. We created a habitat model based on aerial surveys observations from the late summer 2019 paired with remote sensing imagery to establish a baseline of environmental and spatial conditions selected by belugas. Then we assessed the baseline against historical data. We finally evaluated the habitat model with concurrent tagged observations to integrate the inferences made at a larger spatio-temporal scale. High turbidity and warm water temperatures were the two most important factors explaining beluga presence and were associated with the inshore waters of the Mackenzie River channels and along unprotected coastlines. Comparisons with past observations suggested that the observed beluga distribution had shifted from the baseline and was probably the results of the influence of changing environmental conditions on beluga response, either on a temporary (i.e., acclimatisation) or permanent basis (i.e., adaptation). The evaluation of the habitat model showed mixed results. The inferences of selection, created in combining quality of environmental conditions and belugas mechanisms of selection, explained the intertwined patterns of beluga habitat distribution. Those findings enhanced our understanding of EBS beluga ecology and highlighted the complexity in defining and predicting beluga habitat distribution. This complexity, by preventing an accurate assessment of the changing beluga habitat distribution, represents new challenges for harvesters that who may have to switch the timing and location of their harvest in response.

Download or read book Distribution Abundance and Age Segregation of Bowhead Whales in the Southeast Beaufort Sea August September 1985 written by Wayne S. Duval and published by . This book was released on 1986 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study examines the spatial distribution, relative abundance, and age segregation of bowhead whales in relation to petroleum industry activities and oceanographic features in the south-east Beaufort Sea during the 1985 open water season. Surface oceanographic conditions at the time of the aerial surveys (August-September) are described using satellite imagery analyses and in-situ temperature and wind data from industry vessels. Aerial photographic surveys provided information on the age/size class distribution and site tenacity of bowhead whales within the study area. Bowhead sightings recorded by other researchers working in that area during 1985 are also examined. Comparisons are made with results of previous bowhead whale surveys in the area.

Download or read book The 1982 White Whale Monitoring Program Mackenzie Estuary written by Pamela Norton Fraker and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book White Whale Monitoring in the Mackenzie Estuary 1983 written by Ian Robertson and published by . This book was released on 1984 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In June and July 1983 reconnaissance and systematic aerial surveys were undertaken to monitor the arrival, distribution and abundance of white whales in the Mackenzie River Estuary. To maintain consistency with previous studies standard methodologies developed for the program in 1976 by Fraker (1977a) were followed."--Page vi.

Download or read book The 1982 White Whale Monitoring Program Mackenzie Estuary written by Esso Resources Canada and published by . This book was released on 1983 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: Part I: Study of the arrival, abundance and distribution of white whales in the Mackenzie estuary between June 21 and July 20, 1982. Part II: Report on the relationship between landfast ice conditions, the migration of whales and the impact on whale harvesters.

Download or read book White Whale Delphinapterus Leucas Distribution and Abundance and the Relationship to Physical and Chemical Characteristics of the Mackenzie Estuary written by and published by . This book was released on 1979 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The 1979 Whale Monitoring Program Mackenzie Estuary microform written by Mark A. Fraker and published by . This book was released on 1979 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report of study to document distribution and abundance of white whales in the estuary of the Mackenzie River, NWT and success of Inuit hunters in relation to Esso exploration activities. Also provides advice regarding timing and location of Esso operations to minimize adverse effects on whales or whale hunting.

Download or read book Offshore Distribution and Numbers of White Whales in the Eastern Beaufort Sea and Amundsen Gulf Summer 1981 written by Rolph Aubrey Davis and published by . This book was released on 1982 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of four aerial surveys conducted between mid July and mid September 1981 in the Canadian Beaufort Sea and Amundsen Gulf to record the distribution, abundance and movement patterns of white or beluga whales.

Download or read book WHITE WHALE DELPHINAPTERUS LEUCAS DISTRIBUTION AND ABUNDANCE AND THE RELATIONSHIP TO PHYSICAL AND CHEMICAL CHARACTERISTICS OF THE MACKENZIE ESTURARY written by and published by . This book was released on 1979 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental and Biological Factors Affecting Beluga Whale Delphinapterus Leucas Movement and Distribution in Hudson Bay written by Kristin Westdal and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beluga whales (Delphinapterus leucas) are an Arctic cetacean with circumpolar distribution. They are known to have distinct, lengthy and consistent migration paths to and from summer and wintering grounds. The Western Hudson Bay beluga population, the largest summering aggregation in the world, inhabits three main estuaries in the summer season. Little protection is afforded to them here, and little is known of the specific details of their summer distribution and factors affecting that distribution. Using a combination of satellite telemetry, aerial photos, satellite data, and visual observations and historical reports, investigations into factors affecting beluga distribution in Western Hudson Bay were conducted. An examination into beluga age class distribution near the Churchill and Seal River estuaries, using aerial survey imagery, suggested that belugas may not be segregating by age in summer, however the Seal River estuary may be more important from a calf-rearing perspective. Belugas use a greater home range than we would expect, based on historical range data, in the face of predation by their main predator, the killer whale (Orcinus orca). Killer whales are sighted more frequently in Hudson Bay than historically, and results presented here show that ice entrapments, occurring with higher frequency in the future, may impact distribution of beluga as killer whales expand their range and occurrence in Hudson Bay. Finally, an assessment of beluga behaviour in the presence of whale-watching vessels showed that beluga response to vessels varied but the probability of travelling behaviour was significantly greater with distance from vessels; belugas also appear to be spending more time interacting with vessels now, as compared to 15 years ago when there were fewer whale-watching vessels. The results found through this research are useful in informing climate change implications, marine-protected area boundaries, policy and marine spatial planning, and subsistence harvest management.

Download or read book Passive Acoustic Monitoring to Identify Drivers of Beluga Whale Habitat Use in the Mackenzie Estuary written by Kevin Scharffenberg and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding drivers of habitat use of mobile species is critical for understanding the impacts of climate change and formulating management plans. Eastern Beaufort Sea (EBS) beluga whales (Delphinapterus leucas), an important subsistence food source for Inuvialuit, are known to form large aggregations in the Mackenzie Estuary each summer; however, environmental drivers of this habitat use are not understood. Passive acoustic monitoring was used to record beluga presence during this aggregation at key locations in the Mackenzie Estuary, while simultaneously recording environmental and oceanographic data. Belugas moved further into the estuary during cold oceanic influxes and did not use locations which typically see high use during high-speed winds. In an extreme case, a large storm prevented belugas from using the area for five days and negatively affected the subsistence beluga hunt. This information can inform decisions by northern communities and policy makers, aiding in management of the EBS beluga population.

Download or read book Breaking Ice written by Arctic Institute of North America and published by University of Calgary Press. This book was released on 2005 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: "From the pressures of development, technological advances, globalization and climate change to social and cultural life, this book attempts to define the nature of competing demands and assess their impact on the environment. These essays provide a detailed examination of ocean and coastal management in the Canadian north, exploring a wide range of issues critical to environmental stewardship, and breaking the ice to connect academics, government managers, policy-makers, aboriginal groups and industry." --Book Jacket.

Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 1996 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: