scholarly journals The Kill of Wild Geese by the Natives of the Hudson-James Bay Region

ARCTIC ◽  
1957 ◽  
Vol 10 (4) ◽  
pp. 211 ◽  
Author(s):  
Harold C. Hanson ◽  
Campbell Currie
Keyword(s):  
James Bay ◽  
Wintering Grounds ◽  
Bay Area ◽  
Breeding Grounds ◽  
Safe Limit

The economic plight of Indians and Eskimos in the Hudson-James Bay area is partly dependent on the numbers of wild geese nesting in or migrating through their territory. The information presented on kills indicates that the number taken by native hunters is within a safe limit of what the nesting populations of that area can withstand. Expansion of wintering grounds and inaccessibility of breeding grounds assure that wild geese will continue to be an important source of food for the northern natives.

Body condition of Eiders at Danish wintering grounds and at pre-breeding grounds in Åland

2018 ◽  
Vol 160 (1) ◽  
pp. 239-248 ◽  
Author(s):  
Karsten Laursen ◽  
Anders Pape Møller ◽  
Markus Öst
Keyword(s):  
Body Condition ◽  
Wintering Grounds ◽  
Breeding Grounds

The James Bay H.E.P. Complex

1983 ◽  
Vol 2 (2) ◽  
pp. 123-131 ◽  
Author(s):  
W. Hamley
Keyword(s):  
North America ◽  
Economic Recession ◽  
The Other ◽  
Energy Market ◽  
James Bay ◽  
Bay Area ◽  
Planning Decisions ◽  
Major Producer ◽  
The Right ◽  
Installed Capacity

Québec is a major producer of hydro-electricity in North America. In 1971 a massive undertaking was announced to add to this output by tapping the power of the rivers in the James Bay area of the province. There were to be five complexes—La Grande I, La Grande II, NBR, Baleine and Caniapiscau which, when completed in the 1990s, would add nearly 40 000 MW to installed capacity. Work is just reaching completion on La Grande I, the largest of the complexes, but in 1982 it was decided not to proceed with the other four, at least for the immediate future. Such a situation has arisen largely as a consequence of a very volatile period in the energy market coinciding with economic recession which has been very severe in Quebec. It is suggested that part of the solution to the province's problems could come about by utilizing James Bay H.E.P to stimulate local electricity intensive industries as well as earning income through electricity exports. However present uncertainties make planning decisions very difficult and the halting of construction, despite there being no problems of funding currently, seems a correct policy under prevailing conditions. It could be that the James Bay developments are the right scheme at the wrong time.

scholarly journals Anthropogenic noise affects winter song structure of a long-distance migrant, Gambel’s white-crowned sparrow

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Jennifer N Phillips ◽  
Madhusudan Katti
Keyword(s):  
Urban Areas ◽  
Noise Levels ◽  
Long Distance ◽  
Zonotrichia Leucophrys ◽  
Wintering Grounds ◽  
Song Structure ◽  
Habitat Features ◽  
Acoustic Mismatch ◽  
Breeding Grounds ◽  
Zonotrichia Leucophrys Gambelii

Abstract Many animals learn to produce acoustic signals that are used to attract mates and defend territories. The structure of these signals can be influenced by external features of the environment, including the anthropogenic soundscape. In many sedentary species, habitat features and soundscape appears to influence the cultural evolution of songs, often with tradeoffs for better transmission over sexually selected song structure. However, none have investigated whether noise on the wintering grounds affects song structure, which for long-distance migrants may result in an acoustic ‘mismatch’ when returning to a breeding ground. This study investigates urban noise effects on song structure in a long-distance migrant, Zonotrichia leucophrys gambelii, on the wintering grounds in the Fresno Clovis Metropolitan Area and in outlying non-urban areas. Songs and background noise levels were recorded concurrently, and song measurements of frequency and duration were examined differences across noise levels and habitats . We found that the buzz and trill decrease in bandwidth in the presence of noise. The length of the whistle and buzz portion of the song also tends to decreases with noise in urban habitats. This trend toward short, pure tones in noisy areas may transmit better in noisy urban winter habitats, but may not be adaptive on quieter breeding grounds. We suggest that future studies should consider whether winter auditory feedback and song learning environments have consequences for song crystallization and breeding success for long-distance migrants.

BIOLOGICAL AND OCEANOGRAPHIC CONDITIONS IN HUDSON BAY: 6. THE GENERAL HYDROGRAPHY AND HYDRODYNAMICS OF THE WATERS OF THE HUDSON BAY REGION

1932 ◽  
Vol 7 (1) ◽  
pp. 91-118 ◽  
Author(s):  
H. B. HACHEY
Keyword(s):  
Fresh Water ◽  
Water Movement ◽  
Open Ocean ◽  
Hudson Bay ◽  
Water Drainage ◽  
James Bay ◽  
Bay Area ◽  
Hydrographic Conditions ◽  
The Many ◽  
Oceanographic Conditions

The waters of Hudson bay differ markedly from the waters of Hudson strait and the waters of the open ocean. Intense stratification in the upper twenty-five metres, decreasing as the waters of the open ocean are approached, gives Hudson bay the character of a large estuary. Below fifty metres the waters are for all purposes dynamically dead, thus resulting in a cold saline body of water which probably undergoes very little change from season to season. The movements of the waters at various levels are dealt with to show that the inflow of waters from Fox channel and the many fresh-water drainage areas control the hydrographic conditions as found. The main water movement is from the James bay area to Hudson strait and thence to the open ocean.

Nutrient reserve dynamics of lesser snow geese staging at James Bay, Ontario

1979 ◽  
Vol 57 (1) ◽  
pp. 213-219 ◽  
Author(s):  
Ronald C. P. Wypkema ◽  
C. Davison Ankney
Keyword(s):  
Body Weight ◽  
Follicular Development ◽  
James Bay ◽  
Fat Reserves ◽  
Adult Females ◽  
Snow Geese ◽  
Lesser Snow Geese ◽  
Nutrient Reserve ◽  
Breeding Grounds ◽  
Juvenile Males

We compared mean body weights, nutrient reserves (fat and protein), and an index of feeding of lesser snow geese arriving at and leaving southern James Bay in spring and fall 1976. Feeding increased in spring and decreased in fall. Body weight and protein of adults increased in spring, and fat reserves were maintained. The protein increase of adult females was equivalent to the protein in one egg. Ovarian follicular development in adult females appeared to proceed as reserves became available. Juvenile males had completed body growth by the end of the fall staging period but juvenile females had not. Fat and protein reserves of adults arriving on James Bay in the fall were significantly larger than those of adults after wing molt on the breeding grounds. Fat reserves of adults and juveniles increased significantly during the fall; body weight of juvenile females increased also. The fat gain greatly increases the theoretical maximum flight range of the geese and we suggest it is an important determinant of normal fall migration.

Prevalence of heartworm, Sarconema eurycerca, Wehr, 1939 (Nematoda), in whistling swan, Cygnus columbianus columbianus

1979 ◽  
Vol 57 (7) ◽  
pp. 1500-1502 ◽  
Author(s):  
William S. Seegar
Keyword(s):  
North Carolina ◽  
Blood Test ◽  
East Coast ◽  
North Slope ◽  
Wintering Grounds ◽  
Cygnus Columbianus ◽  
The North ◽  
Breeding Grounds

From 1973 to 1976, 795 whistling swans, Cygnus columbianus columbianus, were surveyed for microfilariae of the heartworm, Sarconema eurycerca, by blood test. Swans were captured on their east coast wintering grounds in Maryland and North Carolina, and on their breeding grounds on the North Slope, Alaska. Prevalence of heartworm in winter was 18, 9, 27, and 19% in 1973, 1974, 1975, and 1976, respectively. Prevalence was 32% in adults on the breeding grounds, 1974. Overall prevalence during 4 years was 20%; prevalence was 19% in adults and 24% in juveniles. Microfilariae were not found in cygnets 4 to 6 weeks of age on the breeding grounds.

An Archean ultramafic turbidite from Lac Guyer, James Bay Area, Quebec, Canada

1980 ◽  
Vol 17 (11) ◽  
pp. 1576-1582 ◽  
Author(s):  
Karen Stamatelopoulou-Seymour ◽  
Donald M. Francis
Keyword(s):  
Greenstone Belt ◽  
Sedimentary Rock ◽  
Turbidity Current ◽  
Soft Sediment ◽  
James Bay ◽  
Deformation Structures ◽  
Bay Area ◽  
Volcanic Sequence ◽  
Sediment Deformation ◽  
Soft Sediment Deformation

A sedimentary rock of ultrabasic composition (MgO 28%, SiO2 48%) has been identified in an Archean volcanic sequence ranging from basaltic to peridotitic komatiite in composition, in the Lac Guyer greenstone belt, James Bay region of New Quebec. The ultramafic sedimentary rock is cyclically layered with an internal stratigraphy indicative of deposition from an aqueous turbidity current. Layers which are interpreted to correlate with the arenaceous A, B, and C divisions of turbidites are pyroxene-rich and display sedimentary features such as grading, parallel and cross-laminations, and climbing ripples. Foliated layers with higher normative olivine contents preserve loading and soft sediment deformation structures indicating a pelitic nature when deposited and are interpreted as Bouma E divisions. These features combined with a sympathetic variation of Al2O3 with normative olivine content in successive Bouma divisions suggest that a Mg-chlorite with subordinate serpentine rather than olivine was present, together with pyroxenes and opaques, in the initial sediment. This sediment may have been derived from the degradation of the associated komatiitic volcanics or may represent a contemporaneous reworked ultramafic tuff or ash flow.

Prevalence of lead exposure among age and sex cohorts of Canada geese

1992 ◽  
Vol 70 (5) ◽  
pp. 901-906 ◽  
Author(s):  
Stephen DeStefano ◽  
Christopher J. Brand ◽  
Donald H. Rusch
Keyword(s):  
Lead Exposure ◽  
Blood Lead ◽  
Threshold Value ◽  
Atomic Absorption Spectrophotometry ◽  
Lead Shot ◽  
Canada Geese ◽  
Wintering Grounds ◽  
Blood Samples ◽  
Breeding Grounds ◽  
Age And Sex

We examined the prevalence of lead exposure from ingestion of waste lead shot among age and sex cohorts of Canada geese (Branta canadensis) on the breeding, migration, and wintering grounds of the Eastern Prairie Population. Blood samples from 6963 geese were assayed for lead concentration by atomic absorption spectrophotometry. On the breeding grounds, no goslings and <1% of adults showed evidence of recent exposure to lead shot (i.e., concentrations in the blood elevated above the threshold value of 0.18 ppm lead). However, median background blood lead concentrations (i.e., blood samples with < 0.18 ppm lead) were higher in adults than goslings, indicating that exposure of adults to lead had occurred during previous seasons. Waste lead shot was available on the migration and wintering grounds, where a larger proportion of the blood samples from immatures (< 1 year old) than adults (> 1 year old) had lead concentrations ≥ 0.18 ppm. Median background lead levels remained higher in adults than in immatures throughout fall and winter. We also found that more immature males than immature females had elevated lead concentrations. Higher rates of intake of food and grit (including shot) probably partially account for the higher prevalence of elevated lead concentrations in immature Canada geese.

scholarly journals Molt of the Gray Vireo

The Condor ◽  
2000 ◽  
Vol 102 (3) ◽  
pp. 610-618 ◽  
Author(s):  
Gary Voelker
Keyword(s):  
United States ◽  
Late Summer ◽  
Museum Specimens ◽  
Adult Males ◽  
Wintering Grounds ◽  
Dietary Shift ◽  
Breeding Grounds ◽  
Wintering Areas ◽  
Desert Regions ◽  
Northwestern Mexico

AbstractUsing museum specimens, I document the molt cycles and molting grounds of the Gray Vireo (Vireo vicinior). During prebasic molts, adult female Gray Vireos replace their primaries in 57 days, whereas adult males take 70 days; all body plumage is replaced during this molt. Prebasic molts occur almost exclusively on the breeding grounds; just 3 of 41 specimens replacing primaries were collected away from breeding grounds. No molting specimens were collected from wintering areas. Prealternate molt occurs on the wintering grounds, and appears limited to the replacement of innermost secondaries and a limited molt of body plumage. By performing prebasic molt on breeding grounds, the Gray Vireo differs from several other western breeding passerine species that use desert regions of the southwestern United States and northwestern Mexico to exploit late summer food resources. The areas of these southwestern desert regions used by other species form a small portion of the breeding grounds, and encompass the entire wintering grounds, of Gray Vireos. I hypothesize that this contrast in molting regions is not due to differences in the general timing of prebasic molts among these species; rather, the contrast may be due to constraints imposed on Gray Vireos by a dietary shift to fruit during winter and the need to defend winter territories.

Sign in / Sign up

Export Citation Format

Share Document