Body-mass Dynamics of King Eiders During Incubation
نویسندگان
چکیده
منابع مشابه
Corticosterone selectively decreases humoral immunity in female eiders during incubation.
Immunity is hypothesized to share limited resources with other physiological functions and this may partly account for the fitness costs of reproduction. Previous studies have shown that the acquired immunity of female common eider ducks (Somateria mollissima) is suppressed during their incubation, during which they entirely fast. Corticosterone was proposed to be an underlying physiological me...
متن کاملStrongly increasing blood concentrations of lipid-soluble organochlorines in high arctic common eiders during incubation fast.
Female common eiders (Somateria mollissima) starve during the nesting stage and may loose 30-45% of their initial body mass, mostly through lipid mobilization. In this study, the effects of fasting on the blood concentrations of three lipid-soluble organochlorines (OCs: polychlorinated biphenyl [PCB]-153; 1-dichloro-2,2-bis (p-chlorophenyl) ethylene [p,p'-DDE]; and hexachlorobenzene [HCB]) were...
متن کاملInnate immunity, assessed by plasma NO measurements, is not suppressed during the incubation fast in eiders.
Immunity is hypothesized to share limited resources with other physiological functions and may mediate life history trade-offs, for example between reproduction and survival. However, vertebrate immune defense is a complex system that consists of three components. To date, no study has assessed all of these components for the same animal model and within a given situation. Previous studies have...
متن کاملAllometry, bilateral asymmetry and sexual differences in the vocal tract of common eiders Somateria mollissima and king eiders S. spectabilis
E. H. Miller (correspondence) and J. Williams, Biology Dept., Memorial University of Newfoundland, St. John’s NL A1B 3X9, Canada. E-mail: [email protected]. S. E. Jamieson, ACWERN and Biology Dept., University of New Brunswick, PO Box 45111, Fredericton NB E3B 6E1, Canada. H. G. Gilchrist, Environment Canada, Canadian Wildlife Service, National Wildlife Research Centre, Carleton University, Ottawa...
متن کاملBody mass and clutch size may modulate prolactin and corticosterone levels in eiders.
Altered body condition, increased incubation costs, and egg loss are important proximate factors modulating bird parental behavior, since they inform the adult about its remaining chances of survival or about the expected current reproductive success. Hormonal changes should reflect internal or external stimuli, since corticosterone levels (inducing nest abandonment) are known to increase while...
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ژورنال
عنوان ژورنال: The Auk
سال: 2000
ISSN: 1938-4254,0004-8038
DOI: 10.1093/auk/117.3.812