• Arctic SDI catalogue
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Aerial photos from the Aug 19th, 2015 survey of the Western Hudson Bay beluga population

PURPOSE:

An aerial survey of the Western Hudson Bay beluga whale (Delphinapterus leucas) population was conducted on August 19th, 2015 to provide a population estimate. Surveys were flown in a DeHavilland Twin Otter (DH-6) fitted with four bubble windows and an optical glass-covered camera hatch at the rear underbelly of the plane. A Global Positioning System (GPS) unit logged the position, altitude, speed, and heading of the aircraft each second. Surveys were initially flown at a target ground speed of 100 knots (185 km/h), and target altitudes of 1,000 ft (305 m) for visual surveys and 2,000 ft (610 m) for photographic surveys. After the second day of flying, the target ground speed was adjusted to 110 knots (204 km/h).

Complete coverage of the two photographic strata was achieved using a Nikon D810 camera fitted with a 25 mm lens. The camera was mounted at the rear of the aircraft and directed straight down with the longest side perpendicular to the track line. The camera was connected to a GPS unit to geo-reference photographs, and to a laptop computer to control exposure settings and photo interval. At an altitude of 2,000 ft (610 m), the 25 mm lens captured a ground area of approximately 875 m x 585 m. The photograph interval was set to maintain an overlap of 20 to 40 % between consecutive photos, and with a transect spacing of 600 m, the lateral overlap between photos from adjacent transects was approximately 30 %.

DESCRIPTION:

Aerial surveys of summering Western Hudson Bay (WHB) beluga (Delphinapterus leucas) were conducted on August 19th, 2015 to update the previous population abundance. The survey area comprised five strata (three visual and two photographic) encompassing high use areas around three river estuaries where recurring aggregations of WHB beluga are found during the summer months. This metadata covers the photographic data related to the survey. The photographic surveys completely covered high density aggregations in the Churchill River and near the mouth of the Seal River.

Simple

Date ( RI_366 )
2015-08-06
Date ( RI_367 )
2024-06-25
RI_419
  Government of Canada; Fisheries and Oceans Canada - Steve Ferguson ( Research Scientist )
501 University Cres , Winnipeg , Manitoba , R3T 2N6 , Canada
204-229-3109
RI_409
  Government of Canada; Fisheries and Oceans Canada - Marianne Marcoux ( Research Scientist )
501 University Cres , Winnipeg , Manitoba , R3T 2N6 , Canada
204-228-8042
RI_415
  Government of Canada; Fisheries and Oceans Canada - Marianne Marcoux ( Research Scientist )
501 University Cres , Winnipeg , Manitoba , R3T 2N6 , Canada
204-228-8042
RI_419
  Government of Canada; Fisheries and Oceans Canada - Cory Matthews ( Research Scientist )
501 University Cres , Winnipeg , Manitoba , R3T 2N6 , Canada
RI_412
  Government of Canada; Fisheries and Oceans Canada - AARD Data Request DRAA Demande de donnés (DFO/MPO)
501 University Cres , Winnipeg , Manitoba , R3T 2N6 , Canada
Purpose

An aerial survey of the Western Hudson Bay beluga whale (Delphinapterus leucas) population was conducted in August 2015 to provide a population estimate. Surveys were flown in a DeHavilland Twin Otter (DH-6) fitted with four bubble windows and an optical glass-covered camera hatch at the rear underbelly of the plane. A Global Positioning System (GPS) unit logged the position, altitude, speed, and heading of the aircraft each second. Surveys were initially flown at a target ground speed of 100 knots (185 km/h), and target altitudes of 1,000 ft (305 m) for visual surveys and 2,000 ft (610 m) for photographic surveys. After the second day of flying, the target ground speed was adjusted to 110 knots (204 km/h).

Complete coverage of the two photographic strata was achieved using a Nikon D810 camera fitted with a 25 mm lens. The camera was mounted at the rear of the aircraft and directed straight down with the longest side perpendicular to the track line. The camera was connected to a GPS unit to geo-reference photographs, and to a laptop computer to control exposure settings and photo interval. At an altitude of 2,000 ft (610 m), the 25 mm lens captured a ground area of approximately 875 m x 585 m. The photograph interval was set to maintain an overlap of 20 to 40 % between consecutive photos, and with a transect spacing of 600 m, the lateral overlap between photos from adjacent transects was approximately 30 %.

Status
completed; complété RI_593
Maintenance and update frequency
notPlanned; nonPlanifié RI_542
Keywords
  • delphinapterus leucas
  • Western Hudson Bay
  • beluga
  • stock assessment
  • aerial survey
  • aerial photography
NASA/Global Change Master Directory (GCMD) Science Keywords Version 6.0.0.0.0 NASA/Global Change Master Directory (GCMD) Science Keywords Version 6.0.0.0.0 ( RI_528 )
  • Biological Classification
  • Animals/Vertebrates
  • Toothed Whales
  • Aquatic Ecosystems
  • Oceans
Government of Canada Core Subject Thesaurus Thésaurus des sujets de base du gouvernement du Canada ( RI_528 )
  • Aerial photography
  • Aquatic wildlife
  • Biological diversity
  • Fisheries resources
  • Habitats
  • Marine biology
  • Oceans
  • Whales
DFO Areas Zones du MPO ( RI_525 )
  • Arctic Ocean
  • Hudson Bay and James Bay
Use limitation
Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)
Access constraints
license; licence RI_606
Use constraints
license; licence RI_606
Classification
unclassified; nonClassifié RI_484
Spatial representation type
grid; grille RI_636
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Topic category
  • Biota
Begin date
2015-08-06
End date
2015-08-19
Description
Western Hudson Bay
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thumbnail


Reference system identifier
https://epsg.io / EPSG:4326
Distribution format
  • GeoTIF ( n/a )

  • JPG ( n/a )

  • CSV ( n/a )

RI_414
  Government of Canada; Fisheries and Oceans Canada - Marianne Marcoux ( Research Scientist )
501 University Cres , Winnipeg , Manitoba , R3T 2N6 , Canada
204-228-8042
OnLine resource
Data_Dictionary_Dictionnaire_donnee.pdf ( HTTPS )

Supporting Document;PDF;eng,fra

OnLine resource
Beluga_detections_photos_2015_WHB_survey.csv ( HTTPS )

Dataset;CSV;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000015-000089.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000090-000164.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000165-000239.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000240-000314.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000315-000389.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000390-000464.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000465-000539.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000540-000612.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000613-000686.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000687-000759.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000760-000831.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000832-000903.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000904-000975.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_000976-001047.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001048-001123.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001124-001196.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001197-001274.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001275-001350.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001351-001429.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001430-001502.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001503-001576.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001577-001649.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001650-001724.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001725-001795.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001796-001866.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001867-001941.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_001942-002012.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_002013-002085.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_002086-002159.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_002160-002231.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
2015_WHB_19Aug_25mm_002232-002305.zip ( HTTP )

Dataset;JPG;eng,fra

OnLine resource
aerial_photos_western_hudson_bay_beluga_population ( HTTPS )

Web Service;ESRI REST;eng,fra

File identifier
d5501207-161a-41df-a426-237ed5df8c72 XML
Metadata language
eng; CAN
Character set
utf8; utf8 RI_458
Hierarchy level
dataset; jeuDonnées RI_622
Date stamp
2025-03-17T20:26:57.608Z
Metadata standard name
North American Profile of ISO 19115:2003 - Geographic information - Metadata
Metadata standard version
CAN/CGSB-171.100-2009
RI_414
  Government of Canada; Fisheries and Oceans Canada - Marianne Marcoux ( Research Scientist )
501 University Cres , Winnipeg , Manitoba , R3T 2N6 , Canada
204-228-8042
 
 

Overviews

overview
2015_WHB_Aug.jpg

Spatial extent

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thumbnail


Keywords


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Associated resources

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