Age-Specific Breeding Rates of Female Interior Canada Geese

Moser, Timothy J.; Rusch, Donald H.

doi:10.2307/3809205

Cited by 8 publications

(4 citation statements)

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“…Our estimate may be low because some females that were radiomarked during molt were likely yearlings that would have been 2 years of age when monitored during nesting. Nesting propensity for 2year-old Canada geese is lower than for older birds (MacInnes andDunn 1988, Moser andRusch 1989). The lower estimate for 2001 may have resulted because Anchorage received 10 cm of snow near the peak of nest initiation.…”

Section: Effects Of Radiotransmitters On Reproductionmentioning

confidence: 94%

Effects of Abdominally Implanted Radiotransmitters with Percutaneous Antennas on Migration, Reproduction, and Survival of Canada Geese

Hupp

Pearce

Mulcahy

et al. 2006

Journal of Wildlife Management

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Abdominally implanted radiotransmitters with percutaneous antennas are increasingly used to monitor movements, survival, and reproduction of waterbirds. However, there has been relatively little assessment of the effects of such radios on avian demographic parameters or migration. We implanted either a 26‐ or 35‐g abdominal transmitter with percutaneous antenna in 198 adult female lesser Canada geese (Branta canadensis parvipes) in Anchorage, Alaska during 2000 and 2001. We compared migration chronology, reproductive effort, and survival of radiomarked females to 118 control females marked with leg bands. Arrival dates following spring migration were similar among females in different treatments in 2001. However, in 2002, wind direction during late migration was less favorable, and arrival of females with 35‐g radiotransmitters lagged 1–2 days behind that of control females. Nest initiation dates, clutch size, and mean egg volume were similar for 152 nests of females that lacked radios and 62 nests of radiomarked females. Estimated nesting propensity for females with operable radiotransmitters was 61% and 72% in 2001 and 2002, respectively. Apparent annual survival (ϕ = 0.82, 95% confidence interval: 0.76 to 0.87) was similar among treatments in the first year after geese were marked. In the second and third years after marking, model‐averaged estimates for survival of females with large radiotransmitters were 10% lower than estimates for control females. However, the effect of large radios on long‐term survival was equivocal because of uncertainty surrounding treatment estimates. We conclude that abdominally implanted radiotransmitters with percutaneous antennas had small effects on migration chronology but no apparent effects on fecundity. Abdominal transmitters can provide unbiased estimates of anserine survival in the first year after deployment. Because of the potentially greater effects of larger transmitters on migration and long‐term survival, we recommend that biologists minimize the size of implanted transmitters and deploy radios with caution if long‐term survival of marked birds is a concern.

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Section: Effects Of Radiotransmitters On Reproductionmentioning

confidence: 94%

Effects of Abdominally Implanted Radiotransmitters with Percutaneous Antennas on Migration, Reproduction, and Survival of Canada Geese

Hupp

Pearce

Mulcahy

et al. 2006

Journal of Wildlife Management

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“…Intra-specific interactions. Moser and Rusch (1989) estimated that 100% of 5-year-old EPP Canada Geese attempt breeding and exhibit high natal philopatry. Subsequently, we predicted that density in year, k, may be highly correlated with the number of EPP Canada Goose nests in year, k-5.…”

Section: Model Development and Data Analysismentioning

confidence: 99%

“…Female EPP Canada Geese exhibit natal philopatry (Allen 1996) and delayed breeding (Moser and Rusch 1989), with less than 100% of a cohort breeding until age five. Consequently, the count of EPP Canada Goose nests from previous years, specifically 5 years prior, should be positively associated with the count of EPP Canada Goose nests in the current year.…”

mentioning

confidence: 99%

Species Associations and Habitat Influence the Range-Wide Distribution of Breeding Canada Geese (Branta canadensis interior) on Western Hudson Bay

Reiter¹,

Andersen

Raedeke

et al. 2013

Waterbirds

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“…Environmental influence on recruitment has rarely been studied in long-lived species because of the difficulty of estimating this life history trait from field data. Most previous studies of recruitment have relied on estimation methods that may suffer from some biases, such as measuring the age distribution of firsttime breeders without correcting for variations in survival or capture probabilities among cohorts or time (e.g., MacInnes and Dunn 1988, Moser and Rusch 1989, Thompson et al 1994, Schmutz 2000. Therefore, an individual that is observed breeding for the first time may have bred previously.…”

Section: Introductionmentioning

confidence: 99%

Age and Environmental Conditions Affect Recruitment in Greater Snow Geese

Reed

Gauthier

Pradel

et al. 2003

Ecology

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Recruitment is an important determinant of fitness and population growth rates, but few studies have examined the effect of environmental stochasticity on this life history trait. Furthermore, most studies have been unable to separate the influence of juvenile survival and age‐specific breeding proportions on recruitment. We used a recently developed approach, based on capture–mark–recapture methods, in which local recruitment is analyzed in a multistate model with an unobservable “nonbreeder” state. The data are drawn from a long‐term study of a long‐lived, arctic‐nesting bird, the Greater Snow Goose (Chen caerulescens atlantica), and include marking and recaptures of female goslings and breeding adult females of unknown age between 1990 and 2000. The model considers four parameters: the probability that an individual aged i with no breeding experience starts breeding (ai), juvenile and adult apparent survival (Φ), and capture probability of breeders (p). The flexibility achieved allows us to assess the influence of environmental conditions encountered during early life and at breeding on juvenile survival and the probabilities of starting to breed at a given age. Recruitment was a gradual process (probability of starting to breed at age 2 yr = 0.25 [95% ci, 0.12–0.45]; at age 3 yr = 0.57 [0.20–0.87]) and was completed by age 4 yr (i.e., all remaining immature females started to breed at that age). Juvenile survival was higher in early‐hatched than in late‐hatched females. Juvenile survival varied considerably among cohorts, but our environmental covariates could not explain these differences. Probabilities of starting to breed were less variable, except in lemming crash years, when they were considerably reduced. Snow cover at breeding or hatch date did not affect probabilities of starting to breed. These results suggest that environmental conditions can have an impact on life histories of birds in seasonal environments, but that variations in juvenile survival probably account for most of the fluctuation in the proportion of birds from a cohort that recruit into the breeding population. Use of multistate models to estimate recruitment increases precision in parameter estimates with the addition of data from adults of unknown age. However, we are still restricted by some assumptions, most notably the absence of temporary emigration. Corresponding Editor: T. D. Williams.

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Age-Specific Breeding Rates of Female Interior Canada Geese

Cited by 8 publications

References 0 publications

Effects of Abdominally Implanted Radiotransmitters with Percutaneous Antennas on Migration, Reproduction, and Survival of Canada Geese

Effects of Abdominally Implanted Radiotransmitters with Percutaneous Antennas on Migration, Reproduction, and Survival of Canada Geese

Species Associations and Habitat Influence the Range-Wide Distribution of Breeding Canada Geese (Branta canadensis interior) on Western Hudson Bay

Age and Environmental Conditions Affect Recruitment in Greater Snow Geese

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