Written in EnglishRead online
|Statement||by Denis H. Thomson ... [et al.].|
|Series||Environmental Studies Revolving Funds report -- no. 028.|
|Contributions||Thomson Denis, H., Environmental Studies Revolving Funds (Canada)|
|The Physical Object|
|Pagination||xv, 119 p. :|
|Number of Pages||119|
Download Distribution of bowhead whales in relation to hydrometeorological events in the Beaufort Sea
Get this from a library. Distribution of bowhead whales in relation to hydrometeorological events in Distribution of bowhead whales in relation to hydrometeorological events in the Beaufort Sea book Beaufort Sea.
[H Thomson Denis; Environmental Studies Revolving Funds (Canada);] -- Aerial surveys of the summertime distribution of bowhead whales in the southeastern Beaufort Sea have shown that the distribution of bowheads has been quite variable over the four years of study. Distribution of bowhead whales in relation to hydrometeorological events in the Beaufort Sea.
[Ottawa]: Environmental Studies Revolving Funds, © (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type: Internet Resource, Computer File: All Authors / Contributors. Strip-transect systematic aerial surveys were conducted over the Canadian Beaufort Sea in late August ofand to examine the distribution.
Spatial components of bowhead whale distribution in the Alaskan Beaufort Sea Article in Canadian Journal of Fisheries and Aquatic Sciences 57(11). The distribution of bowhead whales in the southeastern Beaufort Sea and Amundsen Gulf was determined from observa- tions aboard commercial resupply vessels.
Fifty-four to sixty-two whale sightings were recorded on the km (1 nm) of transects. the Western Beaufort Sea (US waters), well west of the typical summer feeding aggregations in the Canadian Beaufort Sea.
Increased understanding of bowhead behavior and distribution is needed to minimize potential impacts from petroleum development activities. The following reports describe field work and the respective analyses conducted under.
The Western Arctic bowhead whale (Balaena mysticetus) is highly adapted to sea ice and annually migrates through the Bering, Chukchi, and Beaufort seas. While the overall distribution and seasonal movements of bowhead whales are mostly understood, information about their distribution in the Alaskan Beaufort Sea in early to mid-summer has not been well Cited by: 2.
Most bowhead whales of the Bering-Chukchi-Beaufort (BCB) stock migrate annually from the Bering Sea, through the Chukchi Sea, to the eastern Beaufort Sea. During the spring migration, bowheads typically arrive in the Barrow area in early April.
Spatial components of bowhead whale (Balaena mysticetus) distribution in the Alaskan Beaufort Sea R.S. Schick and D.L. Urban Abstract: Bowhead whales (Balaena mysticetus) on their fall migration are exposed to oil exploration activities in the Alaskan Beaufort Sea. Summer Distribution of Bowhead Whales, Balaena rnysticetus, Relative to Oil Industry Activities in the Canadian Beaufort Sea, W.
JOHN RICHARDSON,’ ROLPH A. DAVIS,’ C. ROBERT EVANS,’ DONALD K. LJUNGBLAD2 and PAMELA NORTON1s3 (Received 9 September ; accepted in revised form 2 December ) ABSTRACT. Richardson et al. () observed bowhead whales near seismic operations on 21 occasions during summer in the Canadian (i.e., Eastern) Beaufort Sea.
No changes in distribution or avoidance by whales of seismic operations were observed when whales were km from theFile Size: KB. bowhead whales on 21 occasions during summer in the Canadian Beaufort Sea. No changes in distribution or avoidance by whales of seismic operations were observed when whales were km from the seismic source where received sound levels were estimated to be to +dB re 1 ųPa (rms).
They did however, find subtle. The spatial distribution of bowhead whales in the western Beaufort Sea ( o W) in the summer (July and August) and fall (September and October) of through was quantitatively assessed using a geographically-explicit model of bowhead whale relative.
Airgun use during seismic exploration activities is known to cause a decrease in call detection rates (used here as a proxy for calling rates) in migrating bowhead whales. However, the received airgun sound levels at the whales, at which behavioral changes occur, are not known.
To address this question 40 directional autonomous seafloor acoustic recorders Cited by: 4. Since the s, WWF has worked with the community of Clyde River in Northeast Baffin Island, Canada to help document and protect a critical feeding area for bowhead whales.
Ina bowhead whale sanctuary (a place where commercial whaling is prohibited), was created in Isabella Bay close to Clyde River. SC/59/BRG35 Synthesis of lines of evidence for population structure for bowhead whales in the Bering-Chukchi-Beaufort region BARBARA L.
TAYLOR1, RICK LEDUC1, CRAIG GEORGE2, ROBERT SUYDAM2, SUE E. MOORE3 AND DAVID RUGH4 1Southwest Fisheries Science Center, La Jolla Shores Drive, La Jolla, CA USA email contact:.
Biological Conservation 32 () Behaviour of Bowhead Whales Balaena mysticetus Summering in the Beaufort Sea: Reactions to Industrial Activities W.
John Richardson, Mark A. Frakert LGL Ltd, environmental research associates, 22 Fisher St, POBKing City, Ontario LOG I K0, Canada Bernd Wiirsig Moss Landing Marine Laboratories, POBMoss Landing, Cited by: Reactions of bowhead whales, Balaena mysticetus, to seismic exploration in the Canadian Beaufort Sea.
Richardson WJ, Würsig B, Greene CR Jr. The behavioral reactions of bowhead whales to distant seismic vessels not under our control, a controlled approach by a seismic vessel, and controlled tests with a single airgun were by: Zooplankton have uneven and patchy distribution in the ocean (Folt and Burns, ).Such irregular zooplankton occurrence has been documented for the Beaufort Sea (Walkusz et al., ) and was found to have a strong influence on bowhead whale foraging behaviour and distribution ().Oceanographic features that lead to upwelling of deep waters are particularly Cited by: The behavioral reactions of bowhead whales to (1) distant seismic vessels not under our control, (2) a controlled approach by a seismic vessel, and (3) controlled tests with a single airgun were observed.
(1) On 21 occasions in the summers of –84, general activities of bowheads exposed to pulses of underwater noise (– dB re: 1 μPa) from seismic vessels 6–99 km Cited by: tographs of whales to the BCB bowhead whale photo catalog that can be used for estimation of life-history parameters of bowhead whales.
Inthe North Slope Borough (NSB) and NMFS sponsored spring surveys at Barrow () that covered the spring migration past Barrow as during the studies there and in the Bering Sea ().File Size: KB.
NOAA had conducted preliminary ice-based surveys before The IWC's decision on a moratorium was based on NOAA's report that there were fewer than bowhead whales in the Bering-Chukchi-Beaufort (BCB) stock and on an increasing number of strikes. The census effort was proposed to obtain a more accurate population count of the bowhead whales.
These data, including whale-sighting locations and sampling effort, were used to describe right whale distribution in relation to sea-surface temperature (SST) from satellite-derived images.
Locations where whales were sighted (n = ) had an overall mean SST of. We investigated the relationship between sea ice conditions, food availability, and the fall distribution of polar bears (Ursus maritimus) in terrestrial habitats of the Southern Beaufort Sea via weekly aerial surveys in – Aerial surveys were conducted weekly during September and October along the Southern Beaufort Sea coastline and barrier islands Cited by: In the spring ofa major multi-faceted program of research for the Bering-Chukchi-Beaufort Seas population of bowhead whales (Balaena mysticetus) was undertaken, including ice-based visual counting, underwater acoustic monitoring, aerial photo-identi cation, satellite tagging and biopsy sampling.
Bowhead whale body condition and links to summer sea ice and upwelling in the Beaufort Sea John C. Georgea,⇑, Matthew L. Druckenmillerb, Kristin L. Laidrec, Robert Suydama, Brian Persona a North Slope Borough Department of Wildlife Management, Barrow, AKUnited States bNational Snow and Ice Data Center, University of Colorado Boulder, Boulder, CO.
tributions on the shelf near Barrow, at the Beaufort Sea shelf break, and across Barrow Canyon as part of a study investigating environmental variability, oceanography, bowhead whale distribution, and the success and resilience of Iñupiat subsistence whaling.
this. What Are They Doing. Bowhead whales in the Chukchi Sea The research team worked out of Barrow, Alaska at the juxtaposition of two Arctic seas; the Chukchi and Beaufort Seas.
It is a region frequently traveled by the endangered bowhead whale. This project had its genesis in understanding why the region near Barrow, Alaska is a feeding hotspot for migrating bowhead. Home / Project Examples / Quantitative Description of Potential Impacts of OCS Activities on Bowhead Whale Hunting Activities in the Beaufort Sea This study describes the perceptions of the residents of Barrow, Nuiqsut, Kaktovik, and Savoonga of the positive and negative impacts of offshore oil and gas development to those communities.
This study represents the first comprehensive examination of the distribution and abundance of killer whales (Orcinus orca) in the north-west on a collation of sightings data and a multi-year photographic catalogue of killer whales, sighting events have been recorded between andwith most occurring in the last ten by: 9.
Bowhead whales were protected by the precursor to the Endangered Species Act through an amendment to appendix A to Part 17 of Title 50 CFR, adding their name to the list of foreign endangered species.
Bowhead whales might live to be + years old and are named after their enormous bow-shaped mouths which hold the longest baleen of any whale, sometimes measuring over three meters in length. Baleen is a series of comb-like plates that hang from the upper jaw of all of the “baleen whales’” mouths to sieve plankton and small fish from sea.
Our objective was to determine the extent to which analyses of the distribution of bowhead whales Balaena mysticetus are affected by changes in visual ‘availability’ caused by seismic operations. We used aerial survey data collected during seismic operations in the Alaskan Beaufort Sea from late August to early October and fit spatial Cited by: 2.
What Are They Doing. Bowhead whale surfacing in the Arctic Ocean The research team worked out of Barrow, Alaska, at the juxtaposition of two Arctic seas; the Chukchi and Beaufort Seas. It is a region frequently traveled by the endangered bowhead whale.
This project had its genesis in understanding why the region near Barrow, Alaska is a feeding hotspot for migrating bowhead. the extent of winter sea ice to krill abundance patterns and survival rates and have shown krill density to be declining over large scales (Atkinson et al.
Thus, interannual changes in sea ice extent affect the recruit-ment and distribution patterns of Antarctic krill (Loeb et al. ), and potentially those of their predators.
 The relationship between the dynamics of sea ice and phytoplankton abundance were investigated for the Cape Bathurst polynya region of the Canadian Arctic using five years (–) of satellite data from SSM/I and SeaWiFS. The Cape Bathurst polynya exhibited marked interannual variability in sea ice dynamics, both in the timing of initial polynya.
Beaufort sea state 0 to 2 Beaufort sea state 0 to 4 Beaufort sea state 0 to 2 Beaufort sea state 0 to 4 1 2 3 0 0 Total Table 1. Distribution of survey effort relative to fine-scale survey area, sea state and platform.
Next to go were the Baleen sheets. Bowheads have shiny black baleen with sea-scum and other detritus built up in layers. (It’s hard to brush when you have flippers) After some debate, we agreed that the original baleen above appeared to belong to a sun-bleached, dead Bowhead whale.
After quite a few hours in Photoshop this is the result. Many geophysical and offshore drilling operations in the Alaskan Beaufort Sea must be conducted during the brief (September through October) ice free, open water season.
This is the same timeframe in which the bowhead whale migrates from east to west and Alaskan Eskimo whaling communities conduct their annual fall : R.R. Griffeth, D.L. Bremner, J.D. Hall, M.N. Savit. distribution of cetacean sightings in the antarctic: results obtained from the iwc/idcr minke whale assessment cruises, /79 to / [kasamatsu, f., et al., maps] on *free* shipping on qualifying offers.
distribution of cetacean sightings in the antarctic: results obtained from the iwc/idcr minke whale assessment cruisesAuthor: Et al. Kasamatsu, F. The distribution and occurrence of whales, dol-phins and porpoises in the north western North Sea has primarily been described from opportun-istic data collected during seabird surveys in the s and s (Mudge et al.Northridge et al.
) and by dedicated volunteer networks (Evans ). With the addition of the large-scaleCited by: Importantly our results suggest that summer sea ice floe distribution is potentially affected by the state of winter sea ice, including the composition and fracturing (caused by deformation events) of winter sea ice, and that substantial mid-summer breakup of sea ice floes is likely linked to the timing of thermodynamic melt of sea ice in the by: Survey effort ( km; thin lines) in Beaufort sea state ≤4 in the southern U.S.
Atlantic study area (outlined by thick line) during summer Blank areas indicate Beaufort sea states >4 that were not included in the survey effort. The, and m isobaths are shown 30 35 40 FL Cape Hatteras SC GA VA.