Download or read book Sound Exposure and Southern Resident Killer Whales Orcinus Orca written by Marla M. Holt and published by . This book was released on 2008 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sound Exposure and Southern Resident Killer Whales Orcinus Orca written by Marla M. Holt and published by . This book was released on 2008 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sound Exposure and Southern Resident Killer Whales Orcinus Orca written by Marla M. Holt and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 The Sonar of Dolphins written by Whitlow W.L. Au and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: The extraordinary ability of dolphins to echolocate has fascinated scientists and the public since its discovery in the late 1950's. This is the first book to summarize modern research in this area, and presents a broad synthesis of this very interdisciplinary subject. The author is an internationally-recognized expert on dolphin sonar and is thus in a unique position to bring together research on the physiological, mathematical and engineering aspects of the subject. Of interest to auditory researchers, electrical engineers, acoustical physicists, and mammalian physiologists.
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 Implications of Fisheries Closures on the Soundscape in Areas Used by Southern Resident Killer Whales SRKW written by Rianna Burnham and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Fisheries management measures aim to increase fish stocks; here the potential for an additional acoustic benefit to the Endangered Southern Resident Killer Whale (SRKW, Orcinus orca) by lessening disturbance was assessed. Reductions in ambient broadband noise (10 Hz to 100 kHz) were seen generally during fisheries management actions. Recordings made by moorings in western Juan de Fuca Strait showed the greatest decreases in sound levels. For all sites the changes in the SRKW communication band (500 Hz to 15 kHz) seemed to follow seasonal patterns of wind speed, whereas the echolocation frequency range SRKW (15-100 kHz) and higher frequency sound ranges showed an increasing trend from pre- to during to post-measure periods concurrent to increased recreational vessel presence. Reductions seen in Haro Strait and Boundary Pass (~0.5 dB in median sound levels) may be attributable to the voluntary vessel slowdown in place through the summer"--Abstract, page iii.
Download or read book Ocean Noise and Marine Mammals written by National Research Council and published by National Academies Press. This book was released on 2003-05-22 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the 119 species of marine mammals, as well as for some other aquatic animals, sound is the primary means of learning about the environment and of communicating, navigating, and foraging. The possibility that human-generated noise could harm marine mammals or significantly interfere with their normal activities is an issue of increasing concern. Noise and its potential impacts have been regulated since the passage of the Marine Mammal Protection Act of 1972. Public awareness of the issue escalated in 1990s when researchers began using high-intensity sound to measure ocean climate changes. More recently, the stranding of beaked whales in proximity to Navy sonar use has again put the issue in the spotlight. Ocean Noise and Marine Mammals reviews sources of noise in the ocean environment, what is known of the responses of marine mammals to acoustic disturbance, and what models exist for describing ocean noise and marine mammal responses. Recommendations are made for future data gathering efforts, studies of marine mammal behavior and physiology, and modeling efforts necessary to determine what the long- and short-term impacts of ocean noise on marine mammals.
Download or read book A Historical Ecology of Salish Sea Resident Killer Whales Orcinus Orca with Implications for Management written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distinctions in Sound Patterns of Calls by Killer Whales Orcinus Orca from Analysis of Computer Sound Features written by and published by . This book was released on 1998 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Trade Noise Pollution and Killer Whales written by M. Scott Taylor and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Orcinus Orca is the world's largest predator, and simultaneously a significant tourist asset and cultural icon for much of the Pacific Northwest. In the past two decades, the Southern Resident Killer whale (SRKW) population has declined by more than 25 percent, putting them at risk of extinction. The cause of this decline is hotly debated. This paper employs novel data, an innovative noise pollution model, and quasi-experimental methods borrowed from environmental economics to solve this puzzle. We find consistent evidence that vessel noise pollution from international shipping has lowered fertility and raised the mortality of the SRKW significantly. Had noise pollution remained at its pre-1998 levels, the SRKW population would be 30% larger. Noise pollution is a growing threat to marine mammals worldwide.
Download or read book Puget Sound Whales for Sale written by Sandra Pollard and published by Arcadia Publishing. This book was released on 2014-06-24 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: A look at the history of the commercial capturing of orcas in Washington’s Puget Sound, the whales taken, and the efforts to save them. In November, 2005, Washington’s iconic killer whales, known as Southern Resident orcas, were placed on the endangered species list. It was a victory long overdue for a fragile population of fewer than one hundred whales. Author and certified marine naturalist Sandra Pollard traces the story and destinies of the many Southern Resident orcas captured for commercial purposes in or near the Puget Sound between 1964 and 1976. During this time, these highly intelligent members of the dolphin family lost nearly one-third of their population. Drawing on original archive material, this important volume outlines the history of orca captivity while also recounting the harrowing struggle—and ultimate triumph—for the Puget Sound orcas’ freedom. “Making liberal use of interviews, correspondence and newspaper accounts, as well as less intensive use of legislative, governmental, and nonprofit records, Pollard constructs an easily digestible narrative for lay individuals curious about the hunting of Puget Sound’s Northern and Southern Resident killer whale groups between 1965 and 1976. Puget Sound Whales for Sale significantly succeeds the former (Blackfish) in breadth and depth.” —Pacific Northwest Quarterly
Download or read book A Model based Approach Investigating Killer Whale Orcinus Orca Exposure to Marine Vessel Engine Exhaust written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The summer habitat of the southern resident population of killer whales (Orcinus orca) in British Columbia and Washington experiences heavy traffic by vessels involved in whale-watching, sport fishing, other recreational activities, and shipping. Behavioural changes caused by vessel proximity and the impacts of vessel noise have been previously documented, but this is the first study to assess direct impacts of air pollutant emissions from vessel traffic. The concentration and composition of air pollutants from whale-watching vessels that southern resident killer whales are exposed to during the peak tourist season were estimated, as were the health impacts of the exposure. Specifically, the study a) estimated the output of airborne pollutants from the whale-watching fleet based on emissions data from regulatory agencies, b) estimated the vertical dispersion of such pollutants based on air stability data collected in the field and from climatological sources, c) used a dispersion model incorporating data on whale, vessel, and atmospheric behaviour to estimate exposure, and d) examined the likely physiological consequences of this exposure based on allometric extrapolation of data from other mammalian species. The results of these exercises indicate that the current whale-watching guidelines are usually effective in limiting pollutant exposure to levels just at or below those at which adverse health effects would be expected in killer whales. However, under worst-case conditions and even under certain average-case conditions the pollutant levels are much higher than those predicted to cause adverse health effects. With this information, recommendations are made for further studies that would fill in missing information, and increase confidence in the models, and the predicted impact on the southern resident killer whales. Recommendations for limiting killer whale exposure to air pollutants are also provided.
Download or read book Recovery Plan for Southern Resident Killer Whales Orcinus Orca written by and published by . This book was released on 2008 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This plan identifies a range of actions that will contribute to recovery of Southern Resident killer whales. Many of these actions will have a direct effect on killer whale habitat, but they will also help restore and improve a range of habitats, species and ecosystem processes. Although the recovery plan is focused on Southern Residents, the proposed actions will benefit many native species and natural communities. The plan refers to significant efforts on local, state and regional levels to address recovery of other species (particularly salmon), clean up of Puget Sound and management of local resources. Salmon recovery programs throughout Washington, Oregon and California as well as in Canada identify goals that will benefit the entire ecosystem. The Puget Sound Partnership provides a comprehensive approach to cleaning up inland waters of Puget Sound. There are numerous local efforts that are also focused on improving the health of the ecosystem such as the Marine Stewardship Area established in San Juan County. Over time, each of these programs should improve the overall health and biodiversity of the ecosystem. This plan provides background information on Southern Resident killer whale life history and status, and existing protective measures. Recovery goals and criteria are provided along with recovery actions, research and monitoring tasks in a narrative outline. Priorities and costs for the measures are provided in an implementation table"--Introduction.
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 The Effects of Noise on Aquatic Life written by Arthur N. Popper and published by Springer Nature. This book was released on 2024-10-28 with total page 2138 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this landmark new work, the major authorities in the field from around the world present a wealth of research data, coverage of regulatory issues, and thinking about the effects of man-made noise on marine mammals, turtles, amphibians, fishes, and invertebrates. The various themes of the book were chosen to cover the wide range of basic and cutting edge information on this topic. They include the hearing abilities of aquatic animals; communication by means of underwater sound; the description of aquatic soundscapes; different sound sources and their characteristics; the effects of sound on behavior; and assessing, mitigating, and monitoring the effects of aquatic noise. Emphasis is on the cross-fertilization of ideas and findings across species and noise sources. With over 140 contributions from leading researchers, the sources of underwater sound and their effects are discussed in detail.
Download or read book Maintaining Contact written by Patrick J. O. Miller and published by . This book was released on 2000 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
