Genetic and Environmental Components of Clutch Size Variance in a Wild Population of Lesser Snow Geese (Anser caerulescens caerulescens)

Evolution ◽  
1983 ◽  
Vol 37 (4) ◽  
pp. 724 ◽  
Author(s):  
C. Scott Findlay ◽  
Fred Cooke
Keyword(s):  
Clutch Size ◽  
Wild Population ◽  
Snow Geese ◽  
Lesser Snow Geese ◽  
Anser Caerulescens Caerulescens ◽  
Anser Caerulescens

scholarly journals A comparison of drone imagery and ground-based methods for estimating the extent of habitat destruction by lesser snow geese (Anser caerulescens caerulescens) in La Pérouse Bay

PLoS ONE ◽  
2019 ◽  
Vol 14 (8) ◽  
pp. e0217049 ◽  
Author(s):  
Andrew F. Barnas ◽  
Brian J. Darby ◽  
Gregory S. Vandeberg ◽  
Robert F. Rockwell ◽  
Susan N. Ellis-Felege
Keyword(s):  
Habitat Destruction ◽  
Snow Geese ◽  
Lesser Snow Geese ◽  
Anser Caerulescens Caerulescens ◽  
Anser Caerulescens

Corrections: Genetic and Environmental Components of Clutch Size Variance in a Wild Population of Lesser Snow Geese (Anser cacurlescens caerulescens)

Evolution ◽  
1987 ◽  
Vol 41 (2) ◽  
pp. 453 ◽  
Author(s):  
C. Scott Findlay ◽  
Fred Cooke
Keyword(s):  
Clutch Size ◽  
Wild Population ◽  
Snow Geese ◽  
Lesser Snow Geese

Effects of parasitic infections on clutch size of lesser snow geese from a northern breeding colony

1994 ◽  
Vol 72 (3) ◽  
pp. 541-544 ◽  
Author(s):  
Michael Clinchy ◽  
Ian K. Barker
Keyword(s):  
Clutch Size ◽  
Parasite Load ◽  
Convincing Evidence ◽  
Parasitic Infections ◽  
Breeding Colony ◽  
Proximate Cause ◽  
Snow Geese ◽  
Lesser Snow Geese ◽  
Anser Caerulescens Caerulescens

A density-dependent decline in the average clutch size of lesser snow geese (Anser caerulescens caerulescens) occurred from 1973 to 1989 at the breeding colony on the shores of La Pérouse Bay, Manitoba. An increase in average parasite load was hypothesized to be one of the two most likely causes of this decline. We shot 28 incubating adult female lesser snow geese at the La Pérouse Bay colony and examined the carcasses for parasites to determine if there was any proximate association between parasitic infections and the size of the clutch a female laid. We found no convincing evidence that parasitic infections were the proximate cause of any reduction in clutch size. In the absence of evidence of any direct effect of parasites, we conclude that an increase in the average parasite load is probably not the cause of the long-term decline in clutch size at La Pérouse Bay. By default, we suggest that increased intraspecific competition for food at the staging areas on the migratory flyway is the most likely cause of the decline in clutch size.

scholarly journals Winter carry-over effects on spring body condition driven by agricultural subsidies to Lesser Snow Geese (Anser caerulescens caerulescens)

2020 ◽  
Vol 15 (2) ◽  
Author(s):  
Drew N. Fowler ◽  
Elisabeth B. Webb ◽  
Mark P. Vrtiska ◽  
Keith A. Hobson
Keyword(s):  
Body Condition ◽  
Agricultural Subsidies ◽  
Snow Geese ◽  
Lesser Snow Geese ◽  
Anser Caerulescens Caerulescens ◽  
Anser Caerulescens ◽  
Carry Over

scholarly journals Age effects on clutch size and laying dates of individual female Lesser Snow Geese Anser caerulescens

Ibis ◽  
2008 ◽  
Vol 129 ◽  
pp. 527-532 ◽  
Author(s):  
JEAN HAMANN ◽  
FRED COOKE
Keyword(s):  
Clutch Size ◽  
Age Effects ◽  
Individual Female ◽  
Snow Geese ◽  
Lesser Snow Geese ◽  
Anser Caerulescens

Does Clutch Size Vary with Cohort in Lesser Snow Geese?

1985 ◽  
Vol 49 (2) ◽  
pp. 417 ◽  
Author(s):  
C. Scott Findlay ◽  
Robert F. Rockwell ◽  
Fred Cooke
Keyword(s):  
Clutch Size ◽  
Snow Geese ◽  
Lesser Snow Geese

Liberalized harvest regulations have not affected overabundant Snow Geese in Northern Manitoba

The Condor ◽  
2019 ◽  
Vol 121 (2) ◽  
Author(s):  
David N Koons ◽  
Lise M Aubry ◽  
Robert F Rockwell
Keyword(s):  
Management Effectiveness ◽  
Snow Goose ◽  
The North ◽  
Snow Geese ◽  
Lesser Snow Geese ◽  
Anser Caerulescens Caerulescens ◽  
New Findings ◽  
Lesser Snow Goose ◽  
Adaptive Resource ◽  
Improved Methods

Abstract Large amounts of money are spent each year to control overabundant species that imperil biodiversity and ecosystem functioning across the globe. Lesser Snow Geese (Anser caerulescens caerulescens) are emblematic of this issue, as their overabundance has affected a whole suite of plant, insect, and bird communities via a trophic cascade that managers have attempted to stop before it spreads further across the North American (sub)Arctic. To achieve this goal, liberalized harvest measures designed to decrease Lesser Snow Goose survival and abundance were implemented almost 2 decades ago. Our previous quantitative assessment of management effectiveness indicated that the growing Lesser Snow Goose population quickly overwhelmed a satiated hunter population despite liberalized harvest regulations, eventually reducing the fraction of Lesser Snow Geese being harvested each year. Consistent with the philosophy of adaptive resource management, we apply improved methods to additional years of monitoring data to evaluate the ongoing impact of harvest conservation efforts on Lesser Snow Goose harvest rates. Our previous results suggested little effect of liberalized harvest regulations on harvest rates, but our new findings suggest even less of an impact. Harvest rates have recently stabilized at ~3%, the lowest levels observed over the last 48 yr of our study. Barring adverse effects of environmental change on natural mortality or reproductive success, additional measures will need to be taken to reduce Lesser Snow Goose overabundance and their ecosystem damage.

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