Download or read book Distribution and Abundance of Cook Inlet Belukha Whales Delphinapterus Leucas in Winter written by and published by . This book was released on 1997 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: A project management plan for a study that utilizes winter (February-March) aerial surveys of Cook Inlet to locate, count, and record behaviors of beluga whales in order to determine their distribution, relative abundance, and activities during the period of maximum extent of ice-coverage in the inlet.
Download or read book Distribution of Cook Inlet Beluga Whales Delphinapterus Leucas in Winter written by Donald J. Hansen and published by . This book was released on 1999 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aerial Surveys Abundance and Distribution of Beluga Whales Delphinapterus Leucas in Cook Inlet Alaska June 2016 written by Kim E. W. Shelden and published by . This book was released on 2017 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Marine Fisheries Service (NMFS) has conducted aerial surveys to estimate abundance of the beluga population in Cook Inlet, Alaska, each June, July, or both from 1993 to 2012, after which biennial surveys began in 2014. The current document presents survey results and subsequent analyses yielding an abundance estimate and population trend based on data collected during June 2016. Surveys occurred May 31 - June 9, 2016 (49.2 flight hours). All surveys were flown in twin-engine, high-wing aircraft (i.e., an Aero Commander) at a target altitude of 244 m (800 ft) and speed of 185 km/hour (100 knots), consistent with NMFS' surveys of Cook Inlet conducted in previous years. Tracklines were flown 1.4 km from the shoreline, along the entire Cook Inlet coast, including islands. Additionally, sawtooth pattern tracklines were flown across the inlet in 2016. These aerial surveys effectively covered 40% of the total surface area of Cook Inlet and 100% of the coastline. In particular, most of the upper inlet, north of the East and West Foreland where beluga whales are consistently found, was surveyed seven times (out of seven attempts). Paired, independent observers searched on the coastal side of the plane, where most beluga sightings occur, while a single observer searched on the inlet side. A computer operator/data recorder periodically monitored distance from the shoreline (1.4 km) with a clinometer (angle 10°). After finding beluga groups, a series of aerial passes allowed all observers to each make independent counts of every group. In addition, whale groups were video recorded for later analysis and more precise counts in the laboratory. [doi:10.7289/V5/AFSC-PR-2017-09 (https://doi.org/10.7289/V5/AFSC-PR-2017-09)]
Download or read book Summer Fall and Early Winter Behavior of Beluga Whales Delphinapterus Leucas Satellite tagged in Cook Inlet Alaska in 1999 and 2000 written by Kristin L. Laidre and published by . This book was released on 2017 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: The following report contains detailed information on the movement patterns of beluga whales that were satellite-tagged in 1999 and 2000 in Cook Inlet, Alaska. The seasonal movements and dive patterns of three whales CI-9901, CI-0001, and CI-0002 were analyzed, and movement data from the whales tagged in 2000 were referenced to in a subsequent paper by Hobbs et al. (2005). However, the detailed analyses of diving behavior and movement patterns of these individual whales were never made available until now. The seasonal movements and dive patterns of three belugas in Cook Inlet, Alaska, were monitored between June and January 1999-2000 using satellite telemetry. One adult male whale was tagged on 30 May 1999 and tracked until 16 September 1999 (109 days), and one juvenile female and one adult male were tagged on 13 September 2000 and tracked until 2 (115 days) and 18 January 2001 (124 days), respectively. Whales remained in the inlet the entire time they were tracked. Mean dive depths across the entire tracking period ranged from 2.6 m (SD = 5.2) to 5.2 m (SD = 8.8). Mean dive durations ranged from 1.4 minutes (SD = 2.0) to 3.1 minutes (SD = 4.1). Overall mean time at surface (between 0 and 1 m) ranged from 23% to 70% and appeared to be related to season and location. Behavioral periods were identified for each whale (4-60 days) based on stationary movements in a particular part of the inlet and unique diving behavior during that time. Significant differences were found between diving behavior and tidal rate of change and direction, as well as whale location and average sea-ice concentration. Belugas in Cook Inlet display seasonal variation in dive behavior and movement patterns, both of which have implications for sightings rates, correction factors, and abundance estimates obtained for the population. [doi:10.7289/V5AFSC-PR-2017-08 (https://doi.org/10.7289/V5/AFSC-PR-2017-08)].
Download or read book Movement and Dive Behavior of Beluga Whales in Cook Inlet Alaska written by Kimberly T. Goetz and published by . This book was released on 2012 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Limited information exists on the foraging behavior of the endangered population of beluga whales (Delphinapterus leucas) in Cook Inlet, Alaska, especially during the winter months with heavy ice-cover. We used satellite telemetry to record the movement (n = 14) and diving (n = 11) behavior of whales across 3 years (1999-2003), including the winter months. Whales remained in Cook Inlet the entire time they were tracked. Mean dive depths across the entire tracking period ranged from 1.6 (SD ± 2.1) to 6.7 (SD ± 10.4) m and mean dive duration ranged from 1.1 (SD ± 1.3) to 6.9 (SD ± 9.5) minutes. Overall, dives were significantly shorter in the near-shore areas of Chickaloon Bay, Susitna Delta, Knik Arm, Turnagain Arm, and Trading Bay. This type of dive behavior, in combination with significantly slower transit rates suggests that whales are likely foraging in these areas. While belugas tended to prefer shallow inshore waters throughout the year, the presence of sea ice between December and May may prevent access to coastal areas. Preference for pack ice, despite the large proportions of Cook Inlet remaining ice-free, may be an indication of belugas attempting to access coastal areas despite increased ice concentration. With the declining abundance of Cook Inlet belugas, identifying potential foraging areas during ice-covered and ice-free periods is critical to the recovery of this endangered population.
Download or read book Federal Actions Associated with Management and Recovery of Cook Inlet Beluga Whales written by and published by . This book was released on 2003 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marine Fisheries Review written by and published by . This book was released on 2015 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Summer Habitat Preference of Beluga Whales Delphinapterus Leucas in Cook Inlet Alaska written by Kimberly T. Goetz and published by . This book was released on 2005 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AFSC Processed Report written by and published by . This book was released on 1991 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conservation Plan for the Cook Inlet Beluga Whale Delphinapterus Leucas written by and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The White Whales Or Belukhas Delphinapterus Leucas of Cook Inlet Alaska written by Nancy K. Murray (Marine mammalogist) and published by . This book was released on 1979 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Distribution and Migration Exploitation and Former Abundance of White Whales Delphinapterus Leucas in Baffin Bay and Adjacent Waters written by Randall R. Reeves and published by Department of fisheries and oceans. This book was released on 1987 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unpublished historical sources, and published literature, were examined to evaluate early abundance, distribution, and migration of white whales in Baffin Bay and adjacent waters. Principal sources were trading post journals in the Hudson's Bay Company archives, RCMP game reports, International whaling statistics, logbooks and journals of Scottish whaling voyages, and the professional papers of Thomas Southwell.
Download or read book Detecting Changes in Population Trends for Cook Inlet Beluga Whales Delphinapterus Leucas Using Alternative Schedules for Aerial Surveys written by Roderick C. Hobbs and published by . This book was released on 2013 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Measuring population trends, and detecting a change in the trend, of Cook Inlet beluga whales (CIB), Delphinapterus leucas, has a specific role in the co-management agreement that determines harvest levels, and a more general application in the management of the population. Currently, an annual aerial survey schedule has provided abundance estimates from which growth trends for this population are determined. Under the harvest co-management agreement, the measured trend over a 10-year period is used to classify the population into one of three growth categories ('high', 'intermediate', or 'low'; Appendix). The growth category, along with the average abundance over the last 5-year period, is used to determine the number of takes allowed over the next 5-year hunting period (Appendix). For a more general application, we would like to be able to detect a change in the growth rate of the population that results from a change in the underlying life history parameters such as birth interval and rates of survival and identify the year that the change occurred"--Introduction.
Download or read book Detecting Changes in Population Trends for Cook Inlet Beluga Whales Delphinapterus Leucas Using Alternative Schedules for Aerial Surveys written by Roderick C. Hobbs and published by . This book was released on 2013 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Measuring population trends, and detecting a change in the trend, of Cook Inlet beluga whales (CIB), Delphinapterus leucas, has a specific role in the co-management agreement that determines harvest levels, and a more general application in the management of the population. Currently, an annual aerial survey schedule has provided abundance estimates from which growth trends for this population are determined. Under the harvest co-management agreement, the measured trend over a 10-year period is used to classify the population into one of three growth categories ('high', 'intermediate', or 'low'; Appendix). The growth category, along with the average abundance over the last 5-year period, is used to determine the number of takes allowed over the next 5-year hunting period (Appendix). For a more general application, we would like to be able to detect a change in the growth rate of the population that results from a change in the underlying life history parameters such as birth interval and rates of survival and identify the year that the change occurred"--Introduction.
Download or read book Draft Conservation Plan for the Cook Inlet Beluga Whale Delphinapterus Leucas written by Bradley K. Smith and published by . This book was released on 2005 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Species in the Spotlight written by and published by . This book was released on 2016 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The endangered Cook Inlet beluga whale was chosen as one of the eight most at-risk species because this declining population of small whales shares Cook Inlet with Alaska's human population center, transportation hub, and largest concentration of industrial activity. The population has declined by nearly 75% since 1979, from about 1,300 whales to an estimated 340 whales in 2014. The rapid decline and dire status of the Cook Inlet beluga whale population makes it a priority for NMFS and our partners to prevent extinction and promote recovery of this iconic species"--page 2, paragraph 1.
Download or read book Recovery Plan for the Cook Inlet Beluga Whale Delphinapterus Leucas written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
