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 Application of Remote Sensing Methods for Tracking Large Cetaceans written by and published by . This book was released on 1992 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 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 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 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 Application of Remote Sensing Methods for Tracking Large Cetaceans written by and published by . This book was released on 1992 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Right Whale Ecology in the Northwest Atlantic Ocean written by Mark F. Baumgartner and published by . This book was released on 2002 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ecology of the North Atlantic right whale (Eubalaena glacialis) was examined at three spatial scales during the summer and early fall on their northern feeding grounds. The diving and foraging behavior of right whales was investigated at spatial scales of hundreds to thousands of meters by tagging right whales with time-depth recorders to document their diving behavior. The vertical distributions of temperature, salinity and copepods were measured along the tagged whale's track with a conductivity-temperature-depth instrument (CTD) and an optical plankton counter (OPC). Right whales were observed diving to and presumably feeding on discrete layers of their primary prey. older stages of the calanoid copepod Calanus finmarchicus, aggregated just above the bottom mixed layer. Simultaneous visual and oceanographic surveys conducted in the lower Bay of Fundy and Roseway Basin were used to examine right whale distribution at spatial scales of tens of kilometers. Right whale occurrence was associated with greater depths and thicker bottom mixed layers in these regions. There was additional evidence of an association between right whales and ocean fronts in Roseway Basin. Right whale distribution was also examined on spatial scales of hundreds of kilometers by outfitting whales with satellite-monitored radio tags. Movements of the tagged whales were compared to climatological and remotely-sensed environmental datasets to elucidate habitat preferences. The tagged whales moved extensively throughout the Gulf of Maine and western Scotian Shelf where they frequented shallow basins with cold bottom waters, but avoided deep, comparatively warmer basins. Two of the right whale ecology studies described here depended on the OPC for measures of right whale prey distribution and abundance. A final study was conducted to investigate the response of the OPC to C. finmarchicus copepodite stage 5 (CS). Comparisons between collocated OPC casts and zooplankton net samples indicated that the OPC was adept at detecting C. finmarchicus C5. A calibration equation was developed to predict C. finmarchicus C5 abundance from OPC-derived particle abundance.
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 2009 with total page 0 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 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 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 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 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.
Download or read book Individual Identification of North Atlantic Right Whales Eubalaena Glacialis on the Basis of a Natural Tag written by Carol Ann Price and published by . This book was released on 1987 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Northern Right Whale written by United States. National Marine Fisheries Service and published by . This book was released on 2004 with total page 2 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 2002 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
