Birds Observed in the Bristol Bay Region, Alaska (Part III)

The Murrelet ◽  
1931 ◽  
Vol 12 (3) ◽  
pp. 71 ◽  
Author(s):  
John B. Hurley
Keyword(s):  
Bristol Bay

Birds Observed in the Bristol Bay Region, Alaska (Part IV)

The Murrelet ◽  
1932 ◽  
Vol 13 (1) ◽  
pp. 16 ◽  
Author(s):  
John B. Hurley
Keyword(s):  
Bristol Bay

Copper toxicity in Bristol Bay headwaters: Part 2-Olfactory inhibition in low-hardness water

2018 ◽  
Vol 38 (1) ◽  
pp. 198-209 ◽  
Author(s):  
Jeffrey M. Morris ◽  
Stephen F. Brinkman ◽  
Ryan Takeshita ◽  
Andrew K. McFadden ◽  
Michael W. Carney ◽  
...  
Keyword(s):  
Copper Toxicity ◽  
Bristol Bay

scholarly journals Seasonal and developmental differences in blubber stores of beluga whales in Bristol Bay, Alaska using high-resolution ultrasound

2016 ◽  
Vol 97 (4) ◽  
pp. 1238-1248 ◽  
Author(s):  
Leslie A. Cornick ◽  
Lori T. Quakenbush ◽  
Stephanie A. Norman ◽  
Coral Pasi ◽  
Pamela Maslyk ◽  
...  
Keyword(s):  
High Resolution ◽  
Nutritional Status ◽  
Body Mass ◽  
Developmental Differences ◽  
Seasonal Effect ◽  
Noninvasive Method ◽  
Bristol Bay ◽  
Beluga Whales ◽  
Significant Difference ◽  
Ultrasound Measurements

Abstract Diving mammals use blubber for a variety of structural and physiological functions, including buoyancy, streamlining, thermoregulation, and energy storage. Estimating blubber stores provides proxies for body condition, nutritional status, and health. Blubber stores may vary topographically within individuals, across seasons, and with age, sex, and reproductive status; therefore, a single full-depth blubber biopsy does not provide an accurate measure of blubber depth, and additional biopsies are limited because they result in open wounds. We examined high-resolution ultrasound as a noninvasive method for assessing blubber stores by sampling blubber depth at 11 locations on beluga whales in Alaska. Blubber mass was estimated as a proportion of body mass (40% from the literature) and compared to a function of volume calculated using ultrasound blubber depth measurements in a truncated cone. Blubber volume was converted to total and mass-specific blubber mass estimates based on the density of beluga blubber. There was no significant difference in mean total blubber mass between the 2 estimates (R2 = 0.88); however, body mass alone predicted only 68% of the variation in mass-specific blubber stores in juveniles, 7% for adults in the fall, and 33% for adults in the spring. Mass-specific blubber stores calculated from ultrasound measurements were highly variable. Adults had significantly greater blubber stores in the fall (0.48±0.02kg/kgMB) than in the spring (0.33±0.02kg/kgMB). There was no seasonal effect in juveniles. High-resolution ultrasound is a more powerful, noninvasive method for assessing blubber stores in wild belugas, allowing for precise measurements at multiple locations.

New Complexities in Zoogeography and Taxonomy of the Pygmy Whitefish (Prosopium coulteri)

1972 ◽  
Vol 29 (12) ◽  
pp. 1772-1775 ◽  
Author(s):  
C. C. Lindsey ◽  
W. G. Franzin
Keyword(s):  
River System ◽  
Yukon Territory ◽  
Hudson Bay ◽  
The South ◽  
Bristol Bay ◽  
River Drainage ◽  
Bay Area ◽  
First Time ◽  
Mackenzie River

Pygmy whitefish (Prosopium coulteri) are recorded for the first time from the Peel–Mackenzie river drainage (Elliott Lake, Yukon Territory) and from the Hudson Bay drainage (Waterton Lakes, Alberta, in the South Saskatchewan–Nelson river system). The morphology of specimens from both localities contradicts the previously known pattern of a southeastern "low-rakered" and a northwestern "high-rakered" form (with the two forms occurring sympatrically in some lakes of the Bristol Bay area). Specimens from Elliott Lake, the most northerly known locality, resemble the southeastern form and those from Waterton Lakes the northwestern form. Both Waterton and Elliott lakes lie close to unglaciated refugia, suggesting that the species may have survived Wisconsin glaciation and diverged in several different watersheds.

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