Kingsley: Number and distribution of Delphinaplerus leucas, in James, Hudson, and Ungava Bays, Canada 



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Table 2 



Estimates of numbers of beluga whales by stratum and overall, in James Bay, eastern Hudson Bay, and Ungava Bay, during August 

 1993. 



Stratum 



Count of No. of Transect Vj^ V/ 



beluga transects spacing (km) N^.J (lO^) dO-'') SE 



James Bay (including southern Hudson Bay arc) 

 Central Hudson Bay arc: closely spaced transects 

 Northern Hudson Bay arc: widely spaced transects 

 Central and northern Hudson Bay total 

 Ungava Bay (July survey) 

 Ungava Bay (August survey) 



18.52 



9.26 



18.52 



13.9 



18.52 



165 



6 



3 



17 



787 

 174 

 372 

 421 



' The survey expansion factor k for the hne-transect survey in James Bay and eastern Hudson Bay, including the jack-knife bias correction, was 



0.575/km with a jack-knife-estimated SE of 0.0742/km. The one-side effective strip width was 870 m. 

 ^ V, is the component of error variance due to the variability in the encounter rate and consequent uncertainty in estimating its mean. 

 •* V, is the component of error variance due to the uncertainty in estimating the effective strip width. 

 ■* These sightings were made outside the designed transect strip of the strip-transect survey, and estimates are based on an assumed effective strip 



width of 1020 m each side; k = 0.49/km (see text). 

 '■ Population estimates are based on the mean size (5.6) of all groups sighted on reconnaissance and transect flights. 



Table 3 



Sightings of beluga whales in aerial surveys of Ungava Bay during July and August 1993. 



Date 



Area covered by flight 



No. seen 



Where seen 



When seen 



15 Jul Transects in southeast Ungava Bay; and 



the southeast coast from the Kosoak River 

 to the Koroc River 



16 Jul Transects in southwest Ungava Bay; 3 adult 



and the southwest coast from the 

 Whale River to the Leaf River 



17 Jul The southern and eastern coasts from the 



Koksoak River to the Button Islands 



18 Jul The western coast from the Koksoak River 



to Quaqtaq 



19 Jul Transects in southern Ungava Bay between 



the Leaf River and the George River; 

 also the south coast from the George 

 River to False River 



24 Aug The western coast, from the Koksoak 



River to Quaqtaq 



25 Aug The southern coast, from the Whale River 2 



to the George River 



26 Aug Transects in southwest LIngava Bay, and 



the coasts of Leaf Bay and the Leaf River 



27 Aug Transects in southeast Ungava Bay, and 19 



the southeast coast from Whale River 



to Alluviaq 1 



28 Aug Transects in northwest Ungava Bay, and 



the coast of Akpatok Island 



29 Aug Transects in northeast LIngava Bay, and 



the northeast coast from Alluviaq to the 

 Button Islands 



Whale River estuary 



20 mixed 



2 adult -I- possibly 1 calf 



1 adult 



2 adult -H cow-calf pair 

 1 adult; 



1 adult -^ 1 juv. -i- 1 neonate; Whale River estuary 

 1 adult Whale River estuary 



Whale River mouth 



Whale River estuary 



NW Ungava Bay 

 near Leaf Bay 



SE LIngava Bay 

 Whale River estuary 



10 



between 

 transects 



on coastal flight 



on transect' 

 on coastal flight 

 on coastal flight 

 on coastal flight 



on coastal flight 



Whale River mouth on coastal flight 



15 km E of 

 Whale River 



10 km E of 

 Whale River 



on transect' 

 on coastal flight 



' Sightings made "on transect" were outside tlie designed transect strip of 600 m each side of the aircraft. 



