Download or read book Locating North Atlantic Right Whales Eubalaena Glacialis in the Bay of Fundy Using Multiple Sonobuoys written by and published by . This book was released on 2001 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: In July 1999, an array of 17 sonobuoys was deployed in the Grand Manan Basin area of the Bay of Fundy within the designated North Atlantic right whale conservation area. The objectives of this study were to determine the accuracy of locating right whales based on their sounds; to estimate source levels of these sounds; and to determine sound travel distances. This report presents results of that study with regard to the types of sounds identified, typical tonal vocalizations & their duration, determination of their locations, vocalization detection frequency, right whale sound source levels, mean distance to sounds detected, and average signal-to-noise ratio. This study is a step toward investigating methods of automatically detecting right whale sounds in order to improve the possibility of implementing a real-time whale tracking system.
Download or read book Acoustic Communication in the North Atlantic Right Whale Eubalaena Glacialis written by Susan Elizabeth Parks and published by . This book was released on 2003 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this thesis is the use of sound for communication by the North Atlantic right whale (Eubalaena glacialis). The surface active group (SAG) is the predominant social interaction in this species for which use of sound has been documented. Different group compositions in SAGs indicate that both potentially reproductive and non-reproductive groups have been combined under one label. Sound production in SAGs suggests that females form and maintain the groups by producing Scream calls. Males produce Upcalls to advertise their presence as they come into a group or when the female is on a dive. Males may use Gunshot sounds as threat signals to other males in the group or potentially as reproductive advertisement signals to the female. Some calves produce Warble sounds in SAGs. This may be limited to female calves. This description of acoustic activity in the groups adds to the picture of the SAGs as complex interactions between individuals, rather than simple groups with only one whale producing all the sounds to attract other whales to the group. Playback experiments demonstrate that right whales can use sounds from SAGs to locate the groups. Male right whales approached both North Atlantic and Southern right whale SAG playbacks. Female right whales only approached Southern right whale playbacks. Anatomical modeling resulted in a frequency range of hearing for the right whale (10 Hz - 22 kHz) that is consistent with the sounds that they produce and overlaps the frequency range of most anthropogenic noise sources. This combination of research provides a thorough description how North Atlantic right whales use sound in SAGs and how increasing levels of noise in the oceans may impact right whales in these groups.
Download or read book Localisation of North Atlantic Right Whale Eubalaena Glacialis Sounds Using Hydrophone Arrays in the Bay of Fundy microform written by Laurinolli, M. H. (Marjo Hannele) and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2002 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book North Atlantic Right Whale Eubalaena Glacialis Detection Localization in the Bay of Fundy Using Widely Spaced Bottom Mounted Sensors written by and published by . This book was released on 2006 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: A data set consisting of North Atlantic right whale (Eubalaena glacialis) vocalizations were provided as part of the 2003 International Workshop on Detection and Localization of Marine Mammals using Passive Acoustics in Halifax, Nova Scotia. These vocalizations were processed using a set of detection and localization algorithms developed as part of the Marine Mammal Monitoring on Navy Ranges (M3R) program. Localization is performed using hyperbolic multilateration on Time Difference of Arrival (TDOA) data from a two stage FFT based energy detector. Binary FFTs are computed from the raw time series by thresholding the FFT using a time average in each bin as the threshold criteria. Clicks are detected by comparing the total number of bins above threshold to a secondary threshold. Detected clicks are split out of the data stream and the rest of the data is aligned using a spectrogram cross-correlation. Details of the marine mammal monitoring algorithms will be presented as well as results from the data set.).
Download or read book The Urban Whale written by Scott D. Kraus and published by Harvard University Press. This book was released on 2007-02-15 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1980 a group of scientists censusing marine mammals in the Bay of Fundy was astonished by the sight of 25 right whales. Until that time, scientists believed the North Atlantic right whale was extinct or nearly so. The sightings electrified the research community, spurring a quarter century of exploration, which is documented here.
Download or read book The North Atlantic Right Whale Eubalaena Glacialis in the Bay of Fundy 1981 with Notes on the Distribution Abundance Biology and Behavior written by Scott Douglas Kraus and published by . This book was released on 1982 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surveillance Monitoring and Management of North Atlantic Right Whales Eubalaena Glacialis in Cape Cod Bay Massachusetts written by Moira W. Brown and published by . This book was released on 2000 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Disappearing Giants written by Scott Kraus and published by Bunker Hill Publishing, Inc.. This book was released on 2003 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The North Atlantic right whale is the most endangered large whale in the oceans today. This is a story of science and rediscovery, of survival and protection, and of research, without which we cannot hope to protect the right whale's habitat.
Download or read book MEASURING THE DISTRIBUTION OF NORTH ATLANTIC RIGHT WHALES EUBALAENA GLACIALIS ACROSS MULTIPLE SCALES FROM THEIR VOCALIZATIONS written by Delphine Durette-Morin and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this thesis was to assess the distribution of North Atlantic right whales, Eubalaena glacialis (NARW), in Canadian waters using passive acoustic monitoring (PAM) technology at daily to seasonal time-scales, and over sub-regional to continentalshelf spatial-scales, to help advance their conservation. Using a network of PAM platforms, I estimated the quasi-synoptic NARW distribution from the Bay of Fundy to the Labrador Sea, revealing that the current geographic distribution of the species may be constrained to temperate-subarctic latitudinal ranges. In a performance study, I identified the strengths and weaknesses of acoustic gliders equipped with a real-time PAM system as a tool to inform dynamic fishery management designed to minimize NARW entanglements in the Gulf of St Lawrence. Overall, my thesis provides critical information needed to implement PAM in decision-making to mitigate human caused risks to NARWs as well as improve Canada's ability to economically and sustainably monitor the species.
Download or read book A Leviathan of Our Own written by Warren D. Allmon and published by . This book was released on 2004 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Search for the Right Whale written by Scott D. Kraus and published by Alfred A. Knopf Books for Young Readers. This book was released on 1993 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Follows a team of New England Aquarium scientists as they follow and study migrating North Atlantic right whales and speculates about the future survival of this endangered species.
Download or read book Right Whales Wrong Places North Atlantic Right Whales in the Bay of Fundy written by J. A. (Jonathan Arthur) Percy and published by Annapolis Royal, N.S. : Clean Annapolis River Project. This book was released on 1996 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterisation of North Atlantic Right Whale Eubaleana Glacialis Underwater Vocalisations Recorded in the Bay of Fundy July 1999 written by and published by . This book was released on 2000 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Real-time knowledge of whale locations relative to naval operational areas & traffic zones is need to minimize risks of collision and the effects of noise. Passive acoustic monitoring of whale vocalizations may be the easiest, most efficient, and safest manner to localize & track whales in or near an operational area or traffic zone. To this end, a pilot study was conducted in the Bay of Fundy in the presence of an aggregation of North Atlantic right whales, a highly endangered species. The study was designed as a preliminary assessment of the feasibility of using passive acoustics for whale monitoring & location. This report summarizes the results of the first step of the pilot study, which characterized right whale vocalizations in terms of frequency, modulation, duration, harmonics, and time between individual vocalizations. The results indicate whether the whales are vocalizing sufficiently for monitoring and whether the vocalizations contain characteristics that are detectable & quantifiable to allow for automated monitoring.
Download or read book Investigating the Migration and Foraging Ecology of North Atlantic Right Whales with Stable Isotope Geochemistry of Baleen and Zooplankton written by Nadine Stewart J. Lysiak and published by . This book was released on 2008 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The foraging grounds of the endangered North Atlantic right whale (Eubalaena glacialis) are protected under management rulings, but several datasets suggest that right whales use habitats far beyond these areas. In 2005, the National Marine Fisheries Service published a Right Whale Recovery Plan citing the "characterization and monitoring of important habitats" as high research priorities. Stable isotopes ratios in animal tissue are intrinsic tags of migration, as they vary regionally in the environment, and are assimilated via trophic transfer. This dissertation describes carbon, nitrogen, oxygen, and hydrogen stable isotope ratios in baleen and zooplankton collected in the Gulf of Maine, and their application in determining the migration patterns and foraging ecology of E. glacialis. The Gulf of Maine stable isotope landscape was examined through analysis of zooplankton samples from seven E. glacialis habitats. Cape Cod Bay, Great South Channel, and the Bay of Fundy represent distinct isotope sources to right whales. All other habitat areas were statistically indistinguishable, and seasonal right whale movements between these areas cannot be resolved with stable isotope geochemistry. Isotope records in E. glacialis baleen, like those of other large whale species, contain annual oscillations that correspond to broad-scale north/south migrations. To examine right whale movement patterns at seasonal time scales, baleen isotope records, the North Atlantic Right Whale Catalog sighting records, and habitat-specific zooplankton stable isotope values were compared. Poor correlations were found between observed and expected baleen isotope values, likely because of the confounding contribution of body nutrient pools that were de-coupled from diet (i.e. non-essential amino acids). Comparisons of recently collected E. glacialis baleen data with isotope records from late 19 th -early 20 th century baleen revealed a long-term decrease in carbon and increase in nitrogen isotopes. The observed trends are attributed to increasing anthropogenic inputs of carbon dioxide and nitrogen species, climatic forcing from the North Atlantic and Pacific Decadal Oscillations, and poor overall health in the present- day right whale population. The results of this study revealed that right whales use "historic habitat" areas more frequently than currently assumed, and demonstrates both the spatial/temporal limitations of the stable isotope method and the confounding effect of fluctuating biogeochemical signals in the environment.
Download or read book Oceans 2000 MTS IEEE written by and published by . This book was released on 2000 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Right Whales written by Robert L. Brownell and published by . This book was released on 1986 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: 24 papers on the distribution of right whales and on historical whaling of the species.
Download or read book North Atlantic Right Whale written by and published by . This book was released on 2005 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The South Carolina Department of Natural Resources published guides to many threatened animals living in the state. This guide gives information about the North Atlantic right whale, including description, status, habitat, conservation challenges & recommendations, and measures of success.
