A Survey for Mallard Pairs in the Atlantic Flyway

Heusmann, H. W.; Sauer, John R.

doi:10.2307/3802116

Cited by 19 publications

(32 citation statements)

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“…Although the parameter estimate for feeding sites was statistically significant, including the factor made little difference in the estimated population size of mallards, likely because of the relatively small number of sites identified as artificial feeding sites (Heusmann and Sauer 1997). Also, some uncertainty exists in the operational definition of feeding sites in the survey, as survey biologists do not have to actually observe feeding to identify a plot as a feeding site and plots often are not consistently identified as feeding sites.…”

Section: Feeding Site Effects For Mallardsmentioning

confidence: 98%

“…The Atlantic Flyway Breeding Waterfowl Survey (AFBWS) was initiated in 1989 to provide information on the breeding population status of mallards ( Anas platyrhynchos ) and other species in the northeastern United States (Heusmann and Sauer , ). All Atlantic Flyway states from Virginia north participated; Maine was not included because it was surveyed by the United States Fish and Wildlife Service (USFWS) Eastern Breeding Waterfowl Population Survey (Zimmerman et al ).…”

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Hierarchical model analysis of the Atlantic Flyway Breeding Waterfowl Survey

et al. 2014

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We used log‐linear hierarchical models to analyze data from the Atlantic Flyway Breeding Waterfowl Survey. The survey has been conducted by state biologists each year since 1989 in the northeastern United States from Virginia north to New Hampshire and Vermont. Although yearly population estimates from the survey are used by the United States Fish and Wildlife Service for estimating regional waterfowl population status for mallards (Anas platyrhynchos), black ducks (Anas rubripes), wood ducks (Aix sponsa), and Canada geese (Branta canadensis), they are not routinely adjusted to control for time of day effects and other survey design issues. The hierarchical model analysis permits estimation of year effects and population change while accommodating the repeated sampling of plots and controlling for time of day effects in counting. We compared population estimates from the current stratified random sample analysis to population estimates from hierarchical models with alternative model structures that describe year to year changes as random year effects, a trend with random year effects, or year effects modeled as 1‐year differences. Patterns of population change from the hierarchical model results generally were similar to the patterns described by stratified random sample estimates, but significant visibility differences occurred between twilight to midday counts in all species. Controlling for the effects of time of day resulted in larger population estimates for all species in the hierarchical model analysis relative to the stratified random sample analysis. The hierarchical models also provided a convenient means of estimating population trend as derived statistics from the analysis. We detected significant declines in mallard and American black ducks and significant increases in wood ducks and Canada geese, a trend that had not been significant for 3 of these 4 species in the prior analysis. We recommend using hierarchical models for analysis of the Atlantic Flyway Breeding Waterfowl Survey. Published 2014. This article is a U.S. Government work and is in the public domain in the USA.

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Section: Feeding Site Effects For Mallardsmentioning

confidence: 98%

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Hierarchical model analysis of the Atlantic Flyway Breeding Waterfowl Survey

et al. 2014

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“…The implementation of control measures has been widespread, but Canada geese are still nearly twice the state's population objective of 41,000 birds (Atlantic Flyway Council ) and public demand for further control is high. In addition, the New Jersey Division of Fish and Wildlife has maintained intensive AFRP breeding population surveys (Heusmann and Sauer , ) as well as long‐term banding (Castelli and Trost , Beston et al ) and recruitment studies (Guerena ), which provide abundant data to parameterize a population model. Our goal was to compare the effectiveness of harvest, nest treatment, and cull in managing the population.…”

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A population model for management of Atlantic flyway resident population Canada geese

Beston

Williams

Nichols³

et al. 2016

Wildl. Soc. Bull.

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Highly abundant resident Canada geese (Branta canadensis) cause property damage throughout their range. Effective reduction and management of these populations requires knowledge of their population dynamics and responses to management actions. We used data from New Jersey, USA, and other resident Canada goose populations to produce stage-structured matrix models for resident Canada geese from both urban and rural landscapes. We ran stochastic simulations to assess 3 management activities for Atlantic Flyway Resident Population Canada geese: harvest, nest treatment, and cull. Unrealistic harvest rates, in excess of 10% for urban geese, would be needed to reduce the urban population to target levels within 10 years in the absence of other management activities. Nest treatment to prevent hatching is less controversial than culling adults, but as many as 62% of eggs in urban areas would need to be treated annually to sufficiently reduce the mean stochastic population growth rate. Cull would be the most effective way to achieve the population goal, but current cull rates are insufficient to reduce the urban population. Although reduction of urban geese was a challenge, current management activities in rural populations appeared to be sufficient to reduce populations. We also provide a simple spreadsheet tool for managers who want to explore management options for other resident Canada goose populations by inserting relevant vital rate estimates for their populations and manipulating management activities. Ó 2016 The Wildlife Society.

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“…Breeding waterfowl surveys in the Lower Great Lakes Region are currently less spatially comprehensive than those in the Prairie Pothole Region (PPR; Soulliere et al ). Although Breeding Bird Survey data have been used outside traditional survey regions to generate population indices, scientists recognize that these estimates are biased for most wetland birds (Heusmann and Sauer , Soulliere et al ). Declining populations of breeding mallards in the Lower Great Lakes Region may be an artifact of current survey techniques and geographic coverage (Sauer et al , USFWS ).…”

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Mallard survival and nesting ecology in the Lower Great Lakes Region, New York

et al. 2013

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Ecology of mallards (Anas platyrhynchos) breeding in the Lower Great Lakes Region of the United States has not been investigated as comprehensively as mid-continent populations of this species. We studied mallard breeding ecology in the Cowaselon Creek Watershed Area in New York during 2003-2004. Daily and 100-day breeding season survival of female mallards (n ¼ 41) was 0.997 and 0.782, respectively, and was positively influenced by female age and body mass at time of capture. Eight radiomarked female mallards were killed by either mammalian or avian predators. Earliest and latest nest initiation dates were 14 April and 24 May 2003-2004, respectively, and females initiated nests in wetlands 10 days earlier than in uplands. Overall, average clutch size was 9.4 AE 0.32 eggs (SE), and probability of reproductive success of females was 0.27, with nest success in wetlands and uplands of 0.71 and 0.42, respectively. Daily and 35-day nest success was 0.968 and 0.326, respectively. We found an estimated 70% of all initiated nests prior to clutch destruction or hatch; thus, our estimates of nesting and re-nesting effort may be biased low. Survival of breeding females and nest success were comparable or exceeded parameter estimates from other regions of the mallard breeding range. We suggest that wetland and upland habitats are both important to nesting mallards in New York and elsewhere in

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A Survey for Mallard Pairs in the Atlantic Flyway

Cited by 19 publications

References 1 publication

Hierarchical model analysis of the Atlantic Flyway Breeding Waterfowl Survey

Hierarchical model analysis of the Atlantic Flyway Breeding Waterfowl Survey

A population model for management of Atlantic flyway resident population Canada geese

Mallard survival and nesting ecology in the Lower Great Lakes Region, New York

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