Gander's distance from the nest as a function of the goose's incubation period in Canada geese (Branta canadensis maxima).

1995 ◽  
Vol 109 (1) ◽  
pp. 95-98
Author(s):  
Cory John Lindgren ◽  
L. James Shapiro
Keyword(s):  
Incubation Period ◽  
Branta Canadensis ◽  
Canada Geese ◽  
Branta Canadensis Maxima

The costs of raising nidifugous offspring: brood rearing by giant Canada geese (Branta canadensis maxima)

1994 ◽  
Vol 72 (3) ◽  
pp. 533-540 ◽  
Author(s):  
Laura M. Seddon ◽  
Thomas D. Nudds
Keyword(s):  
Brood Size ◽  
Time Budget ◽  
Branta Canadensis ◽  
Feeding Time ◽  
Canada Geese ◽  
Predator Detection ◽  
Brood Rearing ◽  
Competing Hypotheses ◽  
Branta Canadensis Maxima ◽  
Time Spent Feeding

Competing hypotheses that have been advanced to explain the phenomenon of posthatch brood mixing by waterfowl can be distinguished by whether they assume that adults experience costs in rearing nidifugous offspring. To test this, time budget data were collected for giant Canada geese (Branta canadensis maxima) at Cambridge, Ontario, in 1990. Breeding adults with broods devoted more time to vigilance (p = 0.001) and less time to feeding (p = 0.001) than adults that hatched clutches but were without broods, suggesting a cost to rearing nidifugous young. However, as goslings matured, parents allocated less time to vigilance (p < 0.001) and more time to locomotion (p = 0.005), and time spent feeding did not change (p = 0.336). In addition, brood size did not affect the time parents allocated to vigilance (p = 0.543) or feeding (p = 0.727), suggesting that caring for additional young has negligible effects on parents. Goslings were selective about the adult with which they associated (they were positioned closer to females than to males), but neither brood size nor brood age affected the feeding time of goslings (p = 0.94 and 0.76, respectively) or time spent vigilant (p = 0.22 and 0.69, respectively), suggesting that goslings gained no obvious advantage from greater foraging opportunities or better predator detection by congregating in larger broods.

Mate retention in Giant Canada Geese

1988 ◽  
Vol 66 (12) ◽  
pp. 2766-2768 ◽  
Author(s):  
Dennis G. Raveling
Keyword(s):  
Reproductive Success ◽  
Breeding Season ◽  
The Other ◽  
Branta Canadensis ◽  
Canada Geese ◽  
Paired Data ◽  
Mate Retention ◽  
Branta Canadensis Maxima ◽  
Breeding Seasons

Of 73 pairs of Giant Canada Geese (Branta canadensis maxima) in which both members of the pair were marked with individually identifiable neckbands, 68 (93%) remained together for as long as both members were alive or retained their markers. Collectively, these data represent 183 years of pair histories (sum of pairs × years of records). One pair that had raised a brood in the summer they were captured and marked separated during the next breeding season; neither re-paired with another bird, and then they rejoined the following autumn and remained together for five consecutive breeding seasons (and winters). Members of four (5.5%) pairs obtained new mates while their former mates were still alive. Of 17 surviving members of pairs in which the mate died (or disappeared) over winter, 15 (88%) re-paired. Data on reproductive success of 4 of these new pairs were not obtained, but 10 of 11 of the other new pairs successfully reared broods.

Coccidia of Canada geese(Branta canadensis) at Kortright Waterfowl Park, Guelph, Ontario, Canada, with description of Isospora anseris n.sp.

1981 ◽  
Vol 59 (3) ◽  
pp. 493-497 ◽  
Author(s):  
Robert C. Skene ◽  
O. Remmler ◽  
M. A. Fernando
Keyword(s):  
New Species ◽  
Branta Canadensis ◽  
Canada Geese ◽  
Fecal Samples ◽  
A New Species

A survey of adult Canada geese, Branta canadensis, at Kortright Waterfowl Park in Guelph, Ontario, Canada, showed that 20% of the geese sampled passed small numbers of coccidial oocysts throughout the winter months (October 1975 to February 1976). Four species of coccidia, Eimeria hermani Farr, 1953, E. magnalabia Levine, 1951, E. truncata (Raillet and Lucet, 1891) Wasielewski, 1904, and Tyzzeria parvula (Kotlan, 1933) Klimes, 1963, were identified from the samples examined. A hitherto undescribed Isospora sp. was found in 5% of the fecal samples. It is named Isospora anseris and described as a new species. In the spring goslings were found to be passing E. hermani oocysts between the 8th and 13th day of hatching.

An Analysis of Function in the Formation Flight of Canada Geese

The Auk ◽  
1988 ◽  
Vol 105 (4) ◽  
pp. 749-755 ◽  
Author(s):  
John P. Badgerow
Keyword(s):  
Energy Savings ◽  
Direct Method ◽  
Formation Flight ◽  
Branta Canadensis ◽  
Canada Geese ◽  
Complex Behavior ◽  
Visual Contact ◽  
Multiple Hypotheses ◽  
Optimal Function ◽  
Analysis Of Function

Abstract I analyzed formations of Canada Geese (Branta canadensis) with a single, direct method of testing predictions from multiple hypotheses. The results support both energetic (aerodynamic) advantage and orientation communication through visual contact as functions of this complex behavior. Comparison of observed positioning patterns with criteria for optimal function suggests priority may be given to the maximization of energy savings within limits imposed by environmental and other constraints.

scholarly journals Distribution and use of brood-rearing and moulting sites of the Atlantic population of Canada Geese (Branta canadensis) in Nunavik, Quebec

2015 ◽  
Vol 129 (3) ◽  
pp. 229
Author(s):  
Richard C. Cotter
Keyword(s):  
Branta Canadensis ◽  
Hudson Bay ◽  
Canada Geese ◽  
Nesting Ecology ◽  
Brood Rearing ◽  
Atlantic Population ◽  
The Mean ◽  
Shallow Bay ◽  
Over Time ◽  
Coastal Lowlands

The Atlantic population of Canada Geese (Branta canadensis) nests in the coastal lowlands of eastern Hudson Bay and southwestern Ungava Bay in Nunavik, Quebec. Although many aspects of the nesting ecology of this and other northern populations of Canada Geese have been studied and published, there is a paucity of information on the use of brood-rearing and moulting sites. Based on 18 years of band and recapture data from an ongoing banding program, this paper presents the distribution of brood-rearing and moulting sites and the use of these sites over time. Along Hudson Bay and Ungava Bay, the most important brood-rearing and moulting areas are the stretch of coastal lowlands between the Mariet River and Shallow Bay and between Rivière aux Feuilles and Virgin Lake, respectively. Of all adult geese captured during the banding program (n = 41 924), 7.5% (standard error [SE] 0.13%) were recaptures, that is, birds that had previously been caught and banded; annual recapture rates ranged from 5.1% to 11.4%. The mean and median distances between the site of first recapture and the original site of capture were 4.3 km (SE 0.22 km) and 1.5 km, respectively. Juveniles moved, on average, 5.4 km farther than adults and males moved 1.4 km farther than females. Among geese banded as juveniles, males moved twice as far as females: 11.5 km versus 5.7 km.

A study of Canada geese, Branta canadensis, nesting on islands in southeastern Alberta

1970 ◽  
Vol 48 (2) ◽  
pp. 235-240 ◽  
Author(s):  
Kees Vermeer
Keyword(s):  
Egg Laying ◽  
Water Levels ◽  
Branta Canadensis ◽  
Canada Goose ◽  
Canada Geese ◽  
Uniform Spacing ◽  
Incubation Periods

Canada goose clutches situated on islands in Dowling Lake and Lake Newell, Alberta, were checked from laying to hatching. Egg-laying intervals averaged 1.87 days and incubation periods 26.8 days. The distribution of nests showed a significant deviation from randomness in the direction of uniform spacing. Causes of extensive hatching failure at Dowling Lake were predation and desertion. Predation by coyotes was facilitated by low water levels. A preference for nesting on islands appears to be a mechanism to counteract mammalian predation.

The development and pathogenesis of Leucocytozoon simondi in Canada and domestic geese in Algonquin Park, Ontario

1976 ◽  
Vol 54 (5) ◽  
pp. 634-643 ◽  
Author(s):  
Sherwin S. Desser ◽  
Andrée K. Ryckman
Keyword(s):  
Red Blood Cells ◽  
Peripheral Blood ◽  
Blood Cells ◽  
Primary Infection ◽  
Clinical Signs ◽  
Peripheral Circulation ◽  
Branta Canadensis ◽  
Canada Geese ◽  
Severe Anemia ◽  
Branta Canadensis Interior

The development of Leucocytozoon simondi was studied in naturally and experimentally infected Branta canadensis maxima, Branta canadensis interior, and Anser domesticus. The number of mature round gametocytes in the peripheral blood of the Canada geese increased between days 9 and 15 post exposure (PE) and decreased rapidly thereafter. Mean peak parasitemias recorded on day 13 PE were (per 1000 red blood cells (RBC)): 8 gametocytes in B.c. maxima, 16 gametocytes in B.c. interior, and 17 gametocytes in A. domesticus. About 3 weeks PE, gametocytes disappeared from the peripheral circulation and were not observed again during the autumn, winter, and spring in birds kept in the laboratory.Haematocrit determinations in the Canada geese revealed a low fluctuating anemia during the primary infection which subsided by day 21 PE. A more severe anemia was recorded in A. domesticus with a mean low packed RBC value of about 18% on day 11 PE. Immature and mature hepatic schizonts were observed in the Canada and domestic geese between days 3 and 8 PE. Neither megaloschizonts nor elongate gametocytes were seen. Clinical signs, pathology, and mortality commonly associated with L. simondi infection in ducks were not observed. Hypotheses are advanced to explain reports of severe pathogenesis associated with L. simondi infections in Canada geese in other localities.

Prevalence and Genotype Distribution of Chlamydia psittaci in Feral Canada Geese (Branta canadensis) in Belgium

2013 ◽  
Vol 13 (6) ◽  
pp. 382-384 ◽  
Author(s):  
Veerle Dickx ◽  
Isabelle D. Kalmar ◽  
Paul Tavernier ◽  
Daisy Vanrompay
Keyword(s):  
Chlamydia Psittaci ◽  
Branta Canadensis ◽  
Canada Geese ◽  
Genotype Distribution
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