Download or read book Singing Fin Whales Tracked Acoustically Offshore of Southern California written by Leah McLean Varga and published by . This book was released on 2016 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fin whales (Balaenoptera physalus) produce a stereotyped low frequency call (15-30 Hz) that can be detected at great range and is considered song when produced in a repeated pattern. These calls, referred to as 20 Hz calls, were localized and animals were tracked using a kilometer-scale array of four passive acoustic recorders deployed at approximately 800m depth, northwest of San Clemente Island in the Southern California Bight. A total of 4969 calls were localized over four continuous weeks during late fall of 2007. The average estimated source level for the localized calls was 190.9 ± 7.4 dB peak-to-peak re 1[mu]Pa2 at 1m. The majority of the calls in these data were in the form of a doublet song pattern, with average inter-pulse intervals (IPI) 13s and 18s. The tracks were the first to be recorded for singing fin whales transiting alone using passive acoustic monitoring. Acoustic tracking of fin whales provides insight into the ecology and behavior of the species. Estimating call source levels help future predictions of how these whales are impacted by anthropogenic noise. Call source level, along with calling behavior, provide important parameters required for population density estimation. Furthermore, studying fin whale song patterns may aid in distinguishing different subpopulations.
Download or read book Responses of Whales to Experimental Playback of Low Frequency Sound from the Navy SURTASS LFA written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objectives of this study were to characterize the responses of whales to experimental playback of low frequency sounds from the SURTASS LFA sound source. The study involved three different field studies: the first phase involved fin and blue whales feeding in the Southern California Bight, the second phase involved gray whales migrating past the California coast and the third phase involved humpback whales singing offshore of the Big island of Hawaii. Observers on shore and on the source vessel tracked the movement patterns of whale groups with respect to the sound source. Fin and blue whales and singing humpback whales were followed by an observation vessel and tracked acoustically in order to monitor vocal responses to playback. We have presented preliminary results from each phase in several meetings and in quick look reports (the quick look report for phase III is just being completed). The remaining tasks for next year are completing analyses and writing up results for submission to peer reviewed scientific journals.
Download or read book Tracking and Monitoring Fin Whales Offshore the Galicia Margin Using Passive Acoustic Methods written by Jessica Fisher and published by . This book was released on 2017 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Calling Behavior of Blue and Fin Whales Off California written by Erin Marie Oleson and published by . This book was released on 2005 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Noisy Oceans written by Gaye Bayrakci and published by John Wiley & Sons. This book was released on 2023-12-19 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Noisy Oceans Measuring devices such as ocean bottom seismometers and hydrophones designed to detect earthquakes pick up many other signals. These were previously ignored as background noise from unknown sources, but advanced technology now allows insights into the noise created from icebergs, ships, hydrothermal vents, whales, rain, marine engineering, and more. Noisy Oceans: Monitoring Seismic and Acoustic Signals in the Marine Environment is a comprehensive guide to non-tectonic marine noise originating from different environmental, biological, and anthropogenic sources. Volume highlights include: Overview of marine soundscapes and their sources Existing and new methods for studying acoustic signals Case studies from around the world Spans disciplines from geology and geophysicists to biology Explores the impacts and implications of marine noise The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.
Download or read book MMPA Bulletin written by and published by . This book was released on with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution of Calling Blue Fin and Humpback Whales in the North Pacific written by and published by . This book was released on 2000 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: The seasonal distribution of calling blue whales (Balaenoptera musculus) and fin whales (B. physalus), and singing humpback whales (Megaptera novaeangliae) has been analyzed from acoustic data recorded by U.S. Navy Sound Surveillance System (SOSUS) and other hydrophone arrays in the North Pacific. The data from ten arrays were selected as representative of four Regions along the continental margins, labeled Northwest (NW), Northcentral (NC), Northeast (NE), and Southeast (SE). The call data indicate that there is a substantial population of blue whales scattered over the North Pacific and concentrated during the Fall season in the NW and NC Regions. Blue whale calls are recorded in all seasons, particularly in these NW and NC Regions. Fin whales are found in groups but also in relatively large numbers in all Regions, with most calling in the Winter season and in the NC Region, and calling is absent in most Regions during Summer. Fin whale calling includes "F" calls from individuals heard in all seasons and "J" calls from too many whales to separate, particularly prominent in the winter reproductive season. Humpback singing is recorded most in the NC and SE Regions at the time of their Winter/Spring migration. The distribution of singing humpbacks changed in both the NC and SE Regions between the 1996-1997 and 1998-2000 periods.
Download or read book Wild Blue written by Dan Bortolotti and published by Macmillan. This book was released on 2008 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beskriver blåhvalen ud fra en både videnskabelig og historisk vinkel. Indeholder beskrivelse af arterne, vandring, føde og de truede forhold blåhvalen lever under
Download or read book Frontiers of Engineering written by National Academy Of Engineering and published by National Academies Press. This book was released on 2010-03-03 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1995, the National Academy of Engineering initiated the Frontiers of Engineering Program, which brings together about 100 young engineering leaders at annual symposia to learn about cutting-edge research and technical work in a variety of engineering fields. The 2009 U.S. Frontiers of Engineering Symposium was held at The National Academies' Arnold O. and Mabel Beckman Center on September 10-12. Speakers were asked to prepare extended summaries of their presentations, which are reprinted in this volume. The intent of this book is to convey the excitement of this unique meeting and to highlight cutting-edge developments in engineering research and technical work.
Download or read book Fin Whale Song Variability in the Southern California Bight from 2008 Through 2012 written by Jasmine Buccowich and published by . This book was released on 2014 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Male fin whales (Balaenoptera physalus) sing a low frequency song consisting of downswept calls with most energy around 20 Hz. There are some indications fin whale song patterns may be used as a population indicator as they vary amongst regions. Four and a half years of recordings from the San Nicolas Basin in Southern California were analyzed to investigate changes in song inter-pulse-intervals (IPI). The song patterns detected at this site were the Southern California singlet and doublet, and the Gulf of California triplet pattern. The Southern California doublet IPIs increased by ~5 s during the study period; this was the most abundant song type with IPI of ~17 - 23 s in late 2012. The singlet was the second most common song type with an IPI in 2012 of ~18.7 s and it also increased by ~ 5 s over the course of the study. The doublets were present year-round with slight seasonal variability. The singlet presence was higher in the fall and winter. The Gulf of California triplet song pattern was recorded on only one day with IPIs 6 - 6 - 20 s. A comprehensive explanation for the increasing IPI is not evident although the relationship to ship noise may be important and should be further researched.
Download or read book Atlantic Fleet Active Sonar Training written by and published by . This book was released on 2008 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of the Acoustical Society of America written by Acoustical Society of America and published by . This book was released on 2007 with total page 1552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biology and Ecology of Antarctic Krill written by Volker Siegel and published by Springer. This book was released on 2016-08-03 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives a unique insight into the current knowledge of krill population dynamics including distribution, biomass, production, recruitment, growth and mortality rates. Detailed analysis is provided on food and feeding, reproduction and krill behaviour. The volume provides an overview on the aspects of natural challenges to the species, which involve predation, parasites and the commercial exploitation of the resource and its management. A chapter on genetics shows the results of population subdivision and summarizes recent work on sequencing transcriptomes for studying gene function as part of the physiology of live krill. The focus of Chapter 4 is on physiological functions such as biochemical composition, metabolic activity and growth change with ontogeny and season; and will demonstrate which environmental factors are the main drivers for variability. Further discussed in this chapter are the bottle necks which occur in the annual life cycle of krill, and the mechanisms krill have adapted to cope with severe environmental condition.
Download or read book Thousand Mile Song written by David Rothenberg and published by Basic Books (AZ). This book was released on 2008-04-29 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Uses the enigma of whale sounds to examine the question of whether we can ever truly understand nonhuman minds.
Download or read book Before After Control Impact BACI Studies in the Ocean written by Edward Urban and published by Frontiers Media SA. This book was released on 2022-01-05 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Blue and Fin Whale Acoustics and Ecology Off Antarctic Peninsula written by Ana Širović and published by . This book was released on 2006 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Blue whales (Balaenoptera musculus) and fin whales (B. physalus) in the Southern Ocean were subjects of extensive whaling industry during the twentieth century. Their current population numbers remain low, making population monitoring using traditional visual surveys difficult. Both blue and fin whales produce low frequency, regularly repeated calls and are suitable for acoustic monitoring. Eight continuously recording acoustic recorders were deployed off the Western Antarctic Peninsula (WAP) between March 2001 and February 2003. Ranges to calling blue and fin whales were calculated using hyperbolic localization and multipath arrivals up to the distances of 200 and 56 km., respectively. Calls of both species had high intensity, blue whales calls had the average source level 189±3dB re: 1[mu]Pa at 1 meter and the average fin whale call source level was 189±4dB re: 1[mu]Pa at 1 meter. Automatic call detection methods were used for analysis of calling blue and fin whale seasonal presence and habitat preferences. Blue whale calls were detected year round (on average 177 days/year) with peak calling in March and April and a secondary peak in October and November. Fin whale calling rates were seasonal with calls detected between February and June (on average 51 days/year) with a peak in May. During the entire deployment period, detected calls from both species showed negative correlation with sea ice concentrations. Baleen whale sounds were recorded during multiple cruises off the Antarctic Peninsula using sonobuoys. Recordings from two fall cruises off the WAP were used for analyses of habitat preferences of calling blue and fin whales. The presence of calling blue whales was positively correlated with bottom depth and sea surface temperature and negatively correlated with krill biomass in the top 100 meters and abundance of the rest of the zooplankton at depth (101-300 meters). Locations of fin whale calls were associated with a deep trough area and high Chl-a concentrations. Distribution of baleen whale calls recorded in the Scotia Sea (east of the Antarctic Peninsula) indicated that fin whales occur in open water, and blue, southern right (Eubalaena australis), minke (B. bonaerensis), and humpback whales (Megaptera novaeangliae) occur near islands or close to the ice edge.
Download or read book Blue Whale Acoustic Behavior Off Southern California written by Leah Allison Lewis and published by . This book was released on 2017 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: The acoustic repertoire of the Northeast Pacific population of blue whales (Balaenoptera musculus) consists of three different sounds: A, B, and D calls. The pulsed A and tonal B calls can be produced singularly or in phrases or songs, while downswept D calls are only produced as singular calls. Although these sounds have been well described, the behavioral context of sound production is poorly understood. To investigate spatial and temporal variability in blue whale call and song usage off southern California, passive acoustic data collected from four High-Frequency Acoustic Recording Packages (HARPs) were analyzed. The acoustic and dive profile data collected through tags deployed on blue whales were also analyzed to describe the behavioral context of sound production. Singular call and phrase production rates were calculated to assess variability in sound type abundances on different spatial, temporal and behavioral scales. Distinct differences in song type preference were apparent, with offshore sites featuring songs comprised of multiple sequential B units following a single A, while inshore, A and B units alternated. Most blue whale sounds were produced during the summer and fall. The majority of all sounds produced by tagged blue whales occurred during non-lunging dives at shallow depths (less than 30 m). Song production was associated with shallow, non-lunging dives, while singular calls often occurred during lunging dives or bouts of surface behavior. The observed differences in blue whale acoustic behavior off southern California will aid in the development of context specific rates for future models of density estimation.
