Sex-Specific Differences in Winter Distribution Patterns of Canvasbacks

Nichols, James D.; Haramis, G. M.

doi:10.2307/1367565

Cited by 59 publications

(28 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nichols and Haramis (1980) found that in Canvasbacks Aythya valisineria higher proportions of males occurred in large open bodies of water, whilst females tended to frequent smaller outlying waters, and that females generally occupied peripheral areas of flocks. Alexander (1987) determined that a greater proportion of male Canvasbacks consistently utilised the best of two impoundments, as determined by duck counts and biomass assessments of the tubers on the bottom of the ponds.…”

Section: Discussionmentioning

confidence: 92%

Testing the Behavioural Dominance and Dispersal Hypothesis in Pochard

Choudhury¹,

Black²

1991

Ornis Scandinavica

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 92%

Testing the Behavioural Dominance and Dispersal Hypothesis in Pochard

Choudhury¹,

Black²

1991

Ornis Scandinavica

View full text Add to dashboard Cite

show abstract

“…The arrival time hypothesis is therefore irrelevant in these species. Nonetheless, most species show differential migration, with males wintering further north than the females (Petrides 1944;Lebret 1950;Nichols and Haramis 1980;Campredon 1983;Perdeck and Clason 1983;Hepp and Hair 1984;Haramis et al 1994;Carbone and Owen 1995;Owen 1996). Among ducks, Teal Anas crecca is a good study model because this species exhibits differential migration (e.g., Wolff 1966;Ogilvie 1983;Perdeck and Clason 1983).…”

Section: Introductionmentioning

confidence: 99%

Differential migration of the sexes cannot be explained by the body size hypothesis in Teal

et al. 2009

View full text Add to dashboard Cite

The ''body size hypothesis'' predicts that if individuals of a population migrate different distances from the breeding to the wintering grounds, the distance should be related to the differential ability to cope with adverse conditions, with larger individuals wintering further north. Data collected over a 40-year period in Essex, UK and the Camargue, southern France, revealed that the average body mass of Teal ringed in Essex during these years was actually not greater than that of Teal ringed in the Camargue. A higher proportion of males were included in the UK ringing catch than in the French catch, but we found no support for the body size hypothesis to explain such differential migration of the sexes.

show abstract

“…Many migratory bird species in north-temperate regions show latitudinal variation in age and sex ratios during winter (Ketterson andNolan 1976, 1983 and references therein, Nichols and Haramis 1980, Hild6n 1982, Alexander 1983, Morton 1984, Smith and Nilsson 1987. The usual pattern among the sexes is for males to winter farther north than females (Ketterson andNolan 1976, 1983).…”

Section: Introductionmentioning

confidence: 99%