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Dive Characteristics Of Northeast Pacific Blue Whales Balaenoptera Musculus Monitored By Satellite Telemetry
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Book Synopsis Dive Characteristics of Northeast Pacific Blue Whales (Balaenoptera Musculus) Monitored by Satellite Telemetry by : Barbara A. Lagerquist
Download or read book Dive Characteristics of Northeast Pacific Blue Whales (Balaenoptera Musculus) Monitored by Satellite Telemetry written by Barbara A. Lagerquist and published by . This book was released on 1997 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dive characteristics of satellite-monitored blue whales (Balaenoptera musculus) off the central California coast by : B.A. LAGERQUIST
Download or read book Dive characteristics of satellite-monitored blue whales (Balaenoptera musculus) off the central California coast written by B.A. LAGERQUIST and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterizing the Habitat and Diving Behavior of Satellite-tagged Blue Whales (Balaenoptera Musculus) Off California by : Ladd Irvine
Download or read book Characterizing the Habitat and Diving Behavior of Satellite-tagged Blue Whales (Balaenoptera Musculus) Off California written by Ladd Irvine and published by . This book was released on 2008 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was designed to identify and characterize areas of concentrated use and diving behavior of blue whales (Balaenoptera musculus) off the California coast. During the summer of 2004, thirteen blue whales were tagged with implantable Telonics ST-15 Argos satellite-monitored radio tags and five were tagged with Telonics ST-21 Argos satellite-monitored depth of dive tags. Tag duration averaged 100 d with a total of 2159 locations recorded. Whales generally remained near the continental slope and were most often found at the west end of the Santa Barbara Channel, near the Gulf of the Farallones, or between Cape Mendocino and Cape Blanco. Analysis of the 95% kernel density distributions of whale locations showed a one degree increase in sea surface temperature (SST) was correlated with a decrease in whale density by 7% (p
Book Synopsis Blue Whale (Balaenoptera Musculus) Vocalizations Recorded in the North Pacific Ocean by : Kathleen Mary Stafford
Download or read book Blue Whale (Balaenoptera Musculus) Vocalizations Recorded in the North Pacific Ocean written by Kathleen Mary Stafford and published by . This book was released on 2001 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Satellite Monitored Dive Characteristics of the Northern Right Whale, Eubalaena Glacialis by : Sharon L. Nieukirk
Download or read book Satellite Monitored Dive Characteristics of the Northern Right Whale, Eubalaena Glacialis written by Sharon L. Nieukirk and published by . This book was released on 1992 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: The western North Atlantic population of the northern right whale (Eubalaena glacialis) was severely depleted by whaling over the last century. Despite over fifty years of protection, fewer than four hundred individuals are believed to exist in the North Atlantic. Relatively little is known about the diving behavior, respiratory physiology, or diel activity of these whales, although such information could be useful in predicting population abundance and distribution in relation to food or environmental variables. Dive behavior data can be collected visually, but collection is limited to daylight hours, calm weather, and fortuitous encounters with study animals. Satellite-monitored radio tags offer the opportunity to collect data on individual whales' diving behavior continuously, over long distances and periods of time, and at relatively low cost. Thirteen North Atlantic right whales were tagged and monitored in the Gulf of Maine between 1989 and 1991. One male was tagged in 1989; two adult males, six adult females (two with calves) and one juvenile were tagged in 1990; one adult female (with a calf) and two juveniles were tagged in 1991. The duration of monitoring for the whales varied from
Book Synopsis Characterization of Blue Whale Calls from the Northeast Pacific and Development of a Matched Filter to Locate Blue Whales on the U.S. Navy SOSUS (SOund SUrveillance System) Arrays by : Kathleen Mary Stafford
Download or read book Characterization of Blue Whale Calls from the Northeast Pacific and Development of a Matched Filter to Locate Blue Whales on the U.S. Navy SOSUS (SOund SUrveillance System) Arrays written by Kathleen Mary Stafford and published by . This book was released on 1995 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Blue whales (Balaenoptera musculus) are the largest of the baleen whales. Blue whale calls were recorded off the coast of California in fall, 1993 and measured for frequency and time characteristics. On average, blue whale calls lasted 16 s, swept down from 18.9 to 17.3 Hz and were repeated every 38 s. These results are similar to blue whale calls recorded elsewhere in that they possess a frequency downsweep component which lasts from 16-18 s. Ambient noise levels in the ocean due to sources such as wind, waves or shipping can make it difficult to detect blue whale calls in raw hydrophone data. The characteristics of the blue whale calls recorded in the field were sufficiently similar to design a matched filter (kernel) to automatically detect calls obscured by ambient noise. This filter worked well at identifying blue whale calls when applied to the data from which it was derived and on data from the U.S. Navy's SOSUS (SOund SUrveillance System) array. The U.S. Navy has been monitoring low-frequency sounds in the northeast Pacific using bottom-mounted hydrophone arrays since the mid- 1950's. The use of this system was extended to the study of low-frequency whale calls. By applying the matched filter developed from field data to each of three hydrophone arrays and using location algorithms developed for seismic work, it was possible to pick the same call on each array and determine its location by examining the arrival time differences at each hydrophone and comparing this to a predefined location. To confirm the validity of these locations, a ground-truthing experiment was conducted whereby a Navy P-3 aircraft was given locations determined with the matched filter to try to visually and/or acoustically locate blue whales off the Oregon coast. Other locations were determined for 10 days in July and August, 1994.
Book Synopsis Dive and Surfacing Behavior of Bowhead Whales (Balaena Mysticetus) Monitored by Satellite-telemetry by : Gregory K. Krutzikowsky
Download or read book Dive and Surfacing Behavior of Bowhead Whales (Balaena Mysticetus) Monitored by Satellite-telemetry written by Gregory K. Krutzikowsky and published by . This book was released on 1996 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Blue Whale Acoustic Behavior Off Southern California by : Leah Allison Lewis
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.
Book Synopsis The Co-location of Blue Whales and Their Euphausiid Prey Across Multiple Spatial Scales by : Catherine Frances Nickels
Download or read book The Co-location of Blue Whales and Their Euphausiid Prey Across Multiple Spatial Scales written by Catherine Frances Nickels and published by . This book was released on 2017 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Blue whales (Balaenoptera musculus Linnaeus) eat almost exclusively euphausiids and must find dense aggregations above the local mean to satisfy their energetic needs. The paradox implied by the predator-prey relationship between these large baleen whales and euphausiids is how the whales can acquire sufficient food from such small, patchily distributed prey. This problem can be conceptualized as interactions on multiple spatial scales. Through analysis of the euphausiid mandible remains in whale fecal samples, I determined that the prey of blue whales from the northeast Pacific population is consistently and overwhelmingly dominated by Thysanoessa spinifera Holmes, a large neritic euphausiid. Based on the blue whales' extremely limited diet, I hypothesized that blue whales and T. spinifera would be consistently co-located across a range of spatial scales. I investigated the spatial relationship between the predator and prey at multiple spatial scales: the North Pacific Ocean, the California Current System, a regional scale where there is long-term sampling by the CalCOFI program, and a local scale near blue whale aggregation centers. The distributions of blue whales and T. spinifera were only related at the two largest scales investigated. An apparent northward blue whale range expansion beginning around 1997 did not appear to be related to reductions in T. spinifera prey in more southern waters. As sampled, the regional and local scales did not capture the scale of interaction between these predators and prey, suggesting that a smaller scale of sampling was necessary closer to the ambit of a foraging whale. Focusing on a single bathymetric feature (Nine Mile Bank near San Diego, California) I tested the hypothesis that both prey euphausiids and baleen whales aggregate at such abrupt changes in topography. Instead of serving as a point of increased relative abundance, the bank actually represented an offshore limit for blue, fin, and humpback whales feeding on T. spinifera. T. spinifera adults were found deeper in the water than less energetically valuable smaller individuals. The results of this dissertation suggest that blue whales are highly selective predators that can locate and feed on vertical aggregations of T. spinifera located near steep topography.
Book Synopsis Habitats Important to Blue Whales (Balaenoptera Musculus) in the Western North Atlantic by : V. Lesage
Download or read book Habitats Important to Blue Whales (Balaenoptera Musculus) in the Western North Atlantic written by V. Lesage and published by . This book was released on 2018 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Whale Call Data for the North Pacific by :
Download or read book Whale Call Data for the North Pacific written by and published by . This book was released on 2000 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calls of blue whales (Balaenoptera musculus), fin whales (Balaenoptera physalus), and humpback whales (Megaptera novaeangliae) were identified in the data from U.S. Navy Sound Surveilance System (SOSUS) and other hydrophone arrays. These data on calling whales from November 1995 through July 1999 have been listed here for four offshore, deep-water Regions along continental margins of the North and Northeast Pacific. The occurrence of calling whales was monitored during two-day periods each week. Call data recorded from each array identified species, call occurrence, variation, received beam, and relative numbers of calling whales. This allowed assessment of seasonal distribution of calls for the different species, and provided locations for sources received at multiple arrays. Blue whale tonal sounds were distributed widely, received most in the NW Region, with a peak in occurrence in the fall. Fin whale "20-Hz" repetitive pulse sequences were received from whales grouped in local areas in all Regions, with a peak in occurrence in midwinter. Humpback songs were received from December through May particularly in the SE Region. The offshore listening systems allowed basin-wide monitoring of the seasonal distribution of these callng whales.
Book Synopsis The Stocks of Whales by : Neil Alison Mackintosh
Download or read book The Stocks of Whales written by Neil Alison Mackintosh and published by . This book was released on 1965 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis YOUMARES 8 – Oceans Across Boundaries: Learning from each other by : Simon Jungblut
Download or read book YOUMARES 8 – Oceans Across Boundaries: Learning from each other written by Simon Jungblut and published by Springer. This book was released on 2018-08-29 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book presents the proceedings volume of the YOUMARES 8 conference, which took place in Kiel, Germany, in September 2017, supported by the German Association for Marine Sciences (DGM). The YOUMARES conference series is entirely bottom-up organized by and for YOUng MARine RESearchers. Qualified early career scientists moderated the scientific sessions during the conference and provided literature reviews on aspects of their research field. These reviews and the presenters’ conference abstracts are compiled here. Thus, this book discusses highly topical fields of marine research and aims to act as a source of knowledge and inspiration for further reading and research.
Book Synopsis Marine Mammals Ashore by : Joseph R. Geraci
Download or read book Marine Mammals Ashore written by Joseph R. Geraci and published by National Aquarium in Baltimore. This book was released on 2005 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive manual for understanding and carrying out marine mammal rescue activities for stranded seals, manatees, dolphins, whales, or sea otters.
Book Synopsis Marine Mammal Ecology and Conservation by : Ian L. Boyd
Download or read book Marine Mammal Ecology and Conservation written by Ian L. Boyd and published by Oxford University Press. This book was released on 2010-08-12 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Much of our knowledge about marine mammals is derived from a long-term and dedicated research effort that is evolving rapidly due to the introduction and invention of new methods.This book reflects the inventiveness of marine researchers as they try to find ways around the problems presented to them by these unusual and challenging animals.
Book Synopsis Handbook of Marine Mammals by : Sam H. Ridgway
Download or read book Handbook of Marine Mammals written by Sam H. Ridgway and published by . This book was released on 1981 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Twenty-three separate papers, each describing a single species.
Book Synopsis Passive Acoustic Monitoring of Cetaceans by : Walter M. X. Zimmer
Download or read book Passive Acoustic Monitoring of Cetaceans written by Walter M. X. Zimmer and published by Cambridge University Press. This book was released on 2011-04-21 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: Passive acoustic monitoring is increasingly used by the scientific community to study, survey and census marine mammals, especially cetaceans, many of which are easier to hear than to see. PAM is also used to support efforts to mitigate potential negative effects of human activities such as ship traffic, military and civilian sonar and offshore exploration. Walter Zimmer provides an integrated approach to PAM, combining physical principles, discussion of technical tools and application-oriented concepts of operations. Additionally, relevant information and tools necessary to assess existing and future PAM systems are presented, with Matlab code used to generate figures and results so readers can reproduce data and modify code to analyse the impact of changes. This allows the principles to be studied whilst discovering potential difficulties and side effects. Aimed at graduate students and researchers, the book provides all information and tools necessary to gain a comprehensive understanding of this interdisciplinary subject.
