Author: Marianne MarcouxPublisher:
ISBN:
Category : White whale
Languages : en
Pages : 35
Book Description
Model Estimates of Cumberland Sound Beluga (Delphinapterus Leucas) Population Size and Total Allowable Removals
Author: Marianne MarcouxPublisher:
ISBN:
Category : White whale
Languages : en
Pages : 35
Book Description
Estimate of Cumberland Sound Beluga (Delphinapterus Leucas) Population Size from the 2014 Visual and Photographic Aerial Survey
Author: Marianne MarcouxEstimate of Cumberland Sound Beluga (Delphinapterus Leucas) Population Size from the 2014 Visual and Photographic Aerial Survey
Author: Abundance and Total Allowable Landed Catch Estimates from the 2017 Aerial Survey of the Cumberland Sound Beluga (Delphinapterus Leucas) Population
Author: Cortney A. WattPublisher:
ISBN: 9780660393278
Category : Whale populations
Languages : en
Pages : 33
Book Description
Status of Beluga (Delphinapterus Leucas) in Cumberland Sound, Nunavut
Author: Canadian Science Advisory SecretariatPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Estimate of Cumberland Sound Beluga (Delphinapterus Leucas) Population Size from the 2014 Visual and Photographic Aerial Survey
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Belugas (Delphinapterus leucas) in Cumberland Sound are a genetically distinct population in the Canadian eastern Arctic. They have been designated as threatened by the Committee on the Status of Endangered Wildlife in Canada due to a possible decline in abundance. To provide an update to the 2009 population estimate an aerial survey was conducted in August 2014. The 2014 survey had two components; a photographic survey of Clearwater Fiord (a small inlet in the northwest corner of Cumberland Sound), and a visual survey of the northern and western parts of Cumberland Sound. The photographic survey completely covered Clearwater Fiord four times as this is known to be an area where belugas aggregate in the summer months. The survey of the northern part of Cumberland Sound was completed twice, whereas the survey of the western part of Cumberland Sound was completed once. Different correction factors for availability bias were calculated according to the presumed depth at which belugas could be seen from the aircraft and on photos. The corrected estimate for Clearwater Fiord was 603 [coefficient of variance (CV) = 0.076, 95% confidence interval (CI) = 519-699], while the estimate for the northern part of Cumberland Sound was 548 (CV = 0.445, 95% CI = 240-1256). No belugas were seen in the western part of Cumberland Sound. This resulted in a total population abundance of 1151 (CV = 0.214, 95% CI = 760-1744) belugas.
Advice on Size and Trend of the Cumberland Sound Beluga Whale Population, 1990 to 2009
Author: Canadian Science Advisory SecretariatPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Status of Beluga (Delphinapterus Leucas) in Cumberland Sound, Nunavut
Author: Advice on Size and Trend of the Cumberland Sound Beluga Whale Population, 1990 to 2009
Author: Detecting Changes in Population Trends for Cook Inlet Beluga Whales (Delphinapterus Leucas) Using Alternative Schedules for Aerial Surveys
Author: Roderick C. HobbsPublisher:
ISBN:
Category : Aerial surveys in wildlife management
Languages : en
Pages : 25
Book Description
"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.