Incubation as a Reproductive Cost in Female Wood Ducks

Gary R. Hepp; Robert A. Kennamer

doi:10.2307/4088008

Ishi and the Wood Ducks, Part 2, or Ishi, the “Urban” Indian1

Culture Studies &#x2194 Critical Methodologies ◽

10.1177/1532708618787470 ◽

2018 ◽

Vol 19 (4) ◽

pp. 305-319 ◽

Cited By ~ 1

Author(s):

Norman K. Denzin

Keyword(s):

North America ◽

Life And Death ◽

Wood Ducks ◽

Urban Indian

“Ishi and the Wood Ducks, Part 2, or Ishi, The ‘Urban’” Indian” is the first play in a five-play cycle, which dramatizes the events surrounding the life and death of a tribal man named Ishi who was immortalized in Theodora Kroeber’s (1961/1989) best-selling Ishi in Two Worlds: A Biography of the Last Wild Indian in North America.

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Characteristics and Consequences of Nest-Site Fidelity in Wood Ducks

The Auk ◽

10.2307/4088155 ◽

1992 ◽

Vol 109 (4) ◽

pp. 812-818 ◽

Cited By ~ 27

Author(s):

Gary R. Hepp ◽

Robert A. Kennamer

Keyword(s):

Site Fidelity ◽

Nest Site ◽

Nest Site Fidelity ◽

Wood Ducks

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Dump Nesting and Its Effect on Production in Wood Ducks

Journal of Wildlife Management ◽

10.2307/3799828 ◽

1969 ◽

Vol 33 (2) ◽

pp. 284 ◽

Cited By ~ 30

Author(s):

Thomas E. Morse ◽

Howard M. Wight

Keyword(s):

Wood Ducks

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Habitat Use by Nonbreeding Wood Ducks in the Coastal Plain and Rice Prairie Region of Texas

The Southwestern Naturalist ◽

10.2307/3672511 ◽

2002 ◽

Vol 47 (3) ◽

pp. 486 ◽

Cited By ~ 1

Author(s):

James T. Anderson ◽

Thomas C. Tacha

Keyword(s):

Habitat Use ◽

Coastal Plain ◽

Wood Ducks

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Do wood ducks use the quantity of eggs in a nest as a cue to the nest’s value?

Behavioral Ecology ◽

10.1093/beheco/arq055 ◽

2010 ◽

Vol 21 (4) ◽

pp. 794-801 ◽

Cited By ~ 18

Author(s):

Nicole S. Odell ◽

John M. Eadie

Keyword(s):

Wood Ducks

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Identifying and managing pathways of AI transmission by wild birds on meat chicken farms in eastern Australia

10.21203/rs.2.23236/v1 ◽

2020 ◽

Author(s):

Michael G Atzeni ◽

Darren P Fielder ◽

Mark W Dunlop ◽

David G Mayer

Keyword(s):

Wild Birds ◽

Prevalence Data ◽

Wood Ducks ◽

Poultry Facilities ◽

Real Risk ◽

Eastern Australia ◽

Candidate Species ◽

Commercial Poultry ◽

Bridge Species ◽

On Farm

Abstract Conjecture surrounds the reservoir and bridge species potentially involved in introducing, maintaining and transmitting avian influenza (AI) on Australian meat chicken farms. This is mainly due to a lack of AI prevalence data and in-depth understanding of wild bird ecology on farms and across regions. For risk assessment purposes, we identified candidate species likely to be involved in AI maintenance and transmission during 68 bird surveys conducted across ten commercial meat chicken farms from Winter 2016 to Summer 2018 in southeastern Queensland. Using an AI-risk classification processes described in this paper, we speculate that 57 of the 139 species recorded in and around production facilities and nearby water bodies pose a medium to high risk, particularly on free range farms. On the farms with permanent waterbodies, resident and semi-resident dabbling ducks (Genus Anas ) could maintain AI indefinitely on-site, creating opportunities for these species and several bridge species to potentially infect poultry by being a vector between the dam/water habitat and poultry facilities. We suggest that other types of wild birds that may be involved in AI transmission including nomadic waterfowl, grazing ducks (Australian Wood Ducks and Plumed Whistling-duck), Waterhens, Lapwings, resident scavengers (corvids, ibis), birds of prey and mud nests builders (e.g. Fairy Martins). Disrupting AI maintenance cycles on farm dams would reduce the chances of transmission of environmental AI by potential bridge species. This may be achievable by proactively preventing higher risk waterfowl becoming resident and habituated on farms and deterring potential bridge species from accessing poultry houses. Targeted AI surveillance of suspected bridge species is required to determine the real risk. Ideally, this should occur on non-commercial poultry farms where AI transmission to poultry can be objectively investigated.

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Sources of Variation in Survival of Breeding Female Wood Ducks

The Condor ◽

10.1093/condor/108.1.201 ◽

2006 ◽

Vol 108 (1) ◽

pp. 201-210 ◽

Cited By ~ 2

Author(s):

Kevin M. Hartke ◽

James B. Grand ◽

Gary R. Hepp ◽

Travis H. Folk

Keyword(s):

Body Condition ◽

Weight Of Evidence ◽

Breeding Cycle ◽

Breeding Period ◽

Information Theoretic ◽

Wood Ducks ◽

Daily Survival ◽

Radio Transmitters ◽

Sources Of Variation ◽

Nest Initiation

Abstract In waterfowl, reproduction is physiologically demanding and females are exposed to varying risks of mortality at different periods of the breeding cycle. Moreover, differences among females may influence survival within breeding periods. We captured and fitted female Wood Ducks (Aix sponsa) with radio-transmitters before nest initiation during two breeding seasons to estimate survival and investigate sources of variation in survival. We partitioned the breeding season into three periods (preincubation, incubation, postnesting) according to breeding status of individual females, and used information-theoretic methods to compare models in which daily survival varied among periods, between successful and failed nesting females, and with parameters describing individual heterogeneity. Our analysis suggested that daily survival was best modeled as a function of breeding period, differences between successful and failed nesting females during postnesting, and early incubation body condition of successful females during postnesting. Model-averaged daily survival was 0.9988 (95% CL: 0.9963–0.9996) during preincubation and 1.0 during incubation. Postnesting daily survival was 1.0 for failed nesting females and 0.9948 (0.9773–0.9988) for successful females, suggesting a trade-off between current reproduction and survival. Female age, body condition at capture, nest initiation date, and brood size generally were not useful for explaining variation in survival. Only early incubation body condition was important for modeling survival of successful females during postnesting; however, weight of evidence was limited and the effect on survival was weak. Mortality was greatest for females during preincubation and for females that nested successfully. Results support the hypothesis that brood care is costly for females.

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