Download or read book Hotspots and Behavioral Patterns of Southern Alaska Resident Killer Whales Orcinus Orca written by Daniel W. Olsen and published by . This book was released on 2017 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: The resident killer whale (Orcinus orca) is a genetically and behaviorally distinct ecotype of killer whale that feeds primarily on Pacific salmon (Oncorhynchus spp.). Long-term monitoring over 30 years of study has enabled detailed investigation into pod-specific, seasonal, and compositional differences in space use and behavior. To investigate use of habitat, 33 resident killer whales representing 14 pods in the northern Gulf of Alaska were tagged with satellite transmitters during all years from 2006 to 2014, and transmissions were received during the months of June to January. Core use areas were identified through utilization distributions using a biased Brownian Bridge movement model. Tagging results indicate different core use areas between pods, which could be due to cultural transmission within matrilineal groups. To investigate differences in behavior, 1337 hours of behavioral data were collected from 2006 to 2015. For these observations, chi squared tests were used to determine significant differences in behavior budgets between seasons, regions, haplotypes, and numbers of pods. The presence of 'rarely sighted' pods (sighted in less than 5% of encounters) had a large influence on the frequency of social behavior, which increased from 18.5% without their presence to 31.4% with it (X2 = 17.3, df = 1, P

Download or read book Eavesdropping on Killer Whales written by and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The widespread loss of apex consumers in marine, terrestrial, and freshwater ecosystems throughout the world has precipitated profound trophic cascades and switches to different ecological states. However, conserving top predators can deliver broad biodiversity benefits and improve ecosystem resiliency. Effective conservation and management policy is predicated on a species’ distribution and abundance in a given area and time. In this dissertation, I provide new insight into killer whale (Orcinus orca) distribution, vocal behavior, and abundance in the Gulf of Alaska using passive acoustic monitoring and advance long-term monitoring capacity for this species. First, I describe the year-round spatiotemporal distribution and daily acoustic residency patterns of southern Alaska resident (fish-eating) and two populations of transient (mammal-eating) killer whales. I found distinct seasonal patterns across locations for each genetically distinct population and discovered that both resident and transient killer whales used the coastal monitoring areas more extensively than previously known—including in winter. Second, I estimated resident and transient killer whale calling rates, a prerequisite to acoustic abundance estimation. I found that the mean calling rate for southern Alaska resident (fish-eating) killer whales was consistent across space, time, ambient noise level, which pod was calling, and the presence of other pods. Gulf of Alaska transient (mammal-eating) killer whale calling rates were higher than resident’s and differed across locations. AT1 transients (mammal-eating) produced fewer calls more rapidly than Gulf of Alaska transients, and their mean rate was stable across spatiotemporal factors. Although transients call less often than residents, I found that once vocalizing, they do so at a higher rate. Finally, I estimated and modeled the year-round daily acoustic abundance of resident and transient killer whales across distinct areas in the Gulf of Alaska and developed Bayesian time series models to describe seasonal patterns and predict future abundance. Acoustic abundance estimates for the southern Alaska resident and Gulf of Alaska transient killer whales matched expectations from visual studies. I established distinct seasonal abundance patterns across areas, and acoustic monitoring enabled killer whale abundance estimation across a greater spatiotemporal extent than other methods. This work is critical for an accurate understanding of killer whales’ top-down forcing effects in the marine ecosystem, as well as to inform conservation and management policy for this federally protected species.

Download or read book Transients written by John K.B. Ford and published by UBC Press. This book was released on 2011-11-01 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on transient killer whales. Enigmatic and elusive, these mammal-hunting whales are difficult animals to study. They travel in small groups, often moving unpredictably, which makes them less conspicuous than the larger resident pods. For these and other reasons, our understanding of the life history and ecology of transient killer whales has lagged behind that of residents. Transients contains the latest information on the natural history of transient killer whales, including their feeding habits, social lives, and distribution patterns. The catalogue section contains photographs of and notes on over 200 individual whales. Numerous sidebars contain interesting observations on encounters with transients as well as information on how and where to best watch them.

Download or read book Social Behavior and Ecology of southern Resident Killer Whales Orcinus Orca written by Jennifer Anne Marsh and published by . This book was released on 2008 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Habitat Use Patterns and Behavioral Ecology of Killer Whales Orcinus Orca in the Pacific Northwest written by James Robert Heimlich-Boran and published by . This book was released on 1987 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Behavioral Biology of Killer Whales written by Barbara C. Kirkevold and published by . This book was released on 1986 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Southern Resident Killer Whales Orcinus Orca written by Deborah A. Giles and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation concerns the southern resident killer whales (Orcinus orca), a genetically isolated population of fish-eating killer whales that frequent the international waters of the Salish Sea between the United States and Canada in the eastern Pacific Ocean. Research was conducted from June 1 to October 31, 2007 and from June 7 to October 31, 2008, between geographic coordinates: 48°12' to 49° N latitude by 122°43' to 123°50° W longitude. The southern resident killer whale population has experienced multiple fluctuations since population surveys were initiated by the Center for Whale Research (CWR) in the mid 1970's. In November 2005, the U.S. National Oceanic and Atmospheric Administration's National Marine Fisheries Service (NMFS), Northwest Regional Office listed the southern resident killer whales as an endangered distinct population segment of the species Orcinus orca under the United States Endangered Species Act (ESA). Several risk factors including reductions in the quantity and quality of prey (salmon), exposure to persistent toxins, and disturbance from vessel presence and associated noise were identified as contributing to the decline of this already small population. With the listing under the ESA, critical habitat was designated in the inland waters around the U.S. San Juan Islands, Washington State and the Canadian Gulf Islands, British Columbia, Canada. Chapter one, Managing Vessel-based Killer Whale Watching: A Critical Assessment of the Evolution from Voluntary Guidelines to Regulations in the Salish Sea, provides background on the southern resident killer whales and the robust international whale watching industry in the region. This chapter also provides a detailed history of local, state, federal and international vessel laws and guidelines for watching whales in the Salish Sea. Chapter two, Non-invasive methods to study southern resident killer whales and vessel compliance with regulations, describes a novel equipment package, consisting of a differential GPS integrated with a digital compass and laser rangefinder that allowed me to collect accurate geo-referenced locations and behavioral data on whales and vessels throughout the whale's critical habitat. To improve both the spatial and temporal data on whale-vessel interactions, the information collected with this equipment was used to assess vessel compliance with local, state and federal laws and the regionally accepted best-practices Be Whale Wise Guidelines. Chapter three, The effects of vessels on group cohesion and behavior of southern resident killer whales (Orcinus orca), discusses research investigating changes in killer whale group cohesion in response to vessel density, distance and mode of operation. Future cetacean studies would benefit from using the equipment and methods presented here, especially in areas that are not conducive to land-based theodolite collected data.

Download or read book Killer Whales written by Sara Heimlich-Boran and published by . This book was released on 1994 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Killer whales are supreme predators of the world's oceans. Once deemed bloodthirsty killers, these voracious creatures have been at the most dramatic reversals of public opinion in human history. This book explores the ecology and behaviour of killer whales and outlines what can be done to conserve one of the legends of the deep.

Download or read book The Effects of Anthropogenic Noise on the Vocal Behavior of Southern Resident Killer Whales Orcinus Orca written by Jennifer Beissinger Tennessen and published by . This book was released on 2009 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Killer Whales written by John K. B. Ford and published by UBC Press. This book was released on 1996 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition of this best-selling book presents updated results ofover twenty-five years of killer whale research in British Columbia andWashington. Intended for both whale enthusiasts and researchers, itcontains the latest information on killer whale natural history andpresents a catalogue of close to 300 photographs of"resident" killer whales as well as a genealogical registrythat enables readers to identify individual killer whales and theirfamily groups. The technique of photographing the dorsal fin and greysaddle patch of whales has revolutionized the study of killer whales,allowing researchers to follow individuals over the course of manyyears.

Download or read book A Photographic Catalog of Killer Whales Orcinus Orca from the Central Gulf of Alaska to the Southeastern Bering Sea written by Marilyn E. Dahlheim and published by Seascape Research Alliance. This book was released on 1997 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Population s of Killer Whales Orcinus Orca Off Southern Alaska and in Adjacent Northeast Pacific Waters written by Hubbs-Sea World Research Institute 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 The Behavior and Vocalizations of the AT Group of Killer Whales Orcinus Orca in Prince William Sound Alaska written by Eva Saulitis and published by . This book was released on 1993 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Space Use Patterns and Population Trends of Southern Resident Killer Whales Orcinus Orca in Relation to Distribution and Abundance of Pacific Salmon Oncorhynchus Spp in the Inland Marine Waters of Washington State and British Columbia written by Shannon Marie McCluskey and published by . This book was released on 2006 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Social Dynamics of Male Killer Whales Orcinus Orca in Johnstone Strait British Columbia written by Naomi Anne Rose and published by Ann Arbor, Mich. : University Microfilms International. This book was released on 1992 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Killer Whales written by Robin W. Baird and published by New Line Books. This book was released on 2002 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Killer whales are the supreme predators in the ocean. This introduction to killer whales, or orcas, pieces together the latest information on their life histories. How they communicate and maintain well-established societies, with intricate family relationships, over long lifespans. We also learn that killer whales must now contend with toxic pollutants, overfishing of their prey and a host of other environmental concerns. Illustrated by the world's best wildlife photographers, this book brings us face to face with these intriguing creatures in their underwater realms.

Download or read book The Killer Whale Journals written by Hanne Strager and published by JHU Press. This book was released on 2023-04-11 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book delves into our dual nature with orcas, as they are both feared and persecuted, as well as admired and worshiped"--