VezinaThomas2000

Référence

Vezina, F. and Thomas, D.W. (2000) Social status does not affect resting metabolic rate in wintering dark-eyed junco (Junco hyemalis). Physiological and Biochemical Zoology, 73(2):231-236.

Résumé

Studies of wintering birds have demonstrated a correlation between social rank and energy expenditures. It is assumed that dominance is energetically costly because of increased activity, possibly caused by elevated androgen levels. As winter acclimatization leads to an increase in metabolic rate, maintaining dominance status in a cold climate can be a substantial challenge. We measured resting metabolic rates in dominant and subordinate dark-eyed juncos (Junco hyemalis) living in small groups in a controlled winter environment. We found no significant effect of social rank when controlling for body size. It has been shown previously that high testosterone levels during the nonbreeding season can lead to higher body conductance, fat loss, and higher nocturnal body temperature. A hypothesis explaining our result is that for juncos it is preferable to maintain low androgen levels during winter and to maintain social rank using a mechanism other than higher agonistic activity.

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@ARTICLE { VezinaThomas2000,
    AUTHOR = { Vezina, F. and Thomas, D.W. },
    TITLE = { Social status does not affect resting metabolic rate in wintering dark-eyed junco (Junco hyemalis) },
    JOURNAL = { Physiological and Biochemical Zoology },
    YEAR = { 2000 },
    VOLUME = { 73 },
    PAGES = { 231-236 },
    NUMBER = { 2 },
    NOTE = { 15222152 (ISSN) Cited By (since 1996): 8 Export Date: 26 April 2007 Source: Scopus CODEN: PBZOF doi: 10.1086/316737 Language of Original Document: English Correspondence Address: Vezina, F.; Department of Biological Sciences; Simon Fraser University; 8888 University Drive Burnaby, BC V5A 1S6, Canada; email: fvezina@sfu.ca References: Appleby, M.C., The probability of linearity in hierarchies (1983) Anim Behav, 31, pp. 600-608; Baker, M.C., Fox, S., Dominance, survival and enzyme polymorphism in dark-eyed juncos, Junco hyemalis (1978) Evolution, 32, pp. 697-711; Balph, M.H., Winter social behaviour of dark-eyed juncos: Communication, social organization, and ecological implications (1977) Anim Behav, 25, pp. 859-884; Blem, C.R., Avian energy storage (1990) Curr Ornithol, 7, pp. 59-113; Bryant, D.M., Newton, A.V., Metabolic costs of dominance in dippers, Cinclus cinclus (1994) Anim Behav, 48, pp. 447-455; Craig, J.L., Stewart, A.M., Brown, J.L., Subordinates must wait (1982) Z Tierpsychol, 60, pp. 275-280; Cristol, D.A., Cost of switching social groups for dominant and subordinate dark-eyed juncos (Junco hyemalis) (1995) Behav Ecol Sociobiol, 37, pp. 93-101; Daan, S., Masman, D., Groenewold, A., Avian basal metabolic rates: Their association with body composition and energy expenditure in nature (1990) Am J Physiol, 28, pp. R333-R340; Ekman, J.B., Askenmo, C.E.H., Social rank and habitat use in willow tit groups (1984) Anim Behav, 32, pp. 508-514; Feuerbacher, I., Prinzinger, R., The effects of the male sex-hormone testosterone on body temperature and energy metabolism in male japanese quail (Coturnix coturnix japonica) (1981) Comp Biochem Physiol A, 70, pp. 247-250; Fretwell, S.D., Dominance behaviour and winter habitat distribution in juncos (Junco hyemalis) (1969) Bird-banding, 40, pp. 1-83; Fugle, G.N., Rothstein, S.I., Osenberg, C.W., McGinley, M.A., Signal status in wintering white-crowned sparrows Zonotrichia leucophrys gambelii (1984) Anim Behav, 32, pp. 86-93; Hegner, R.E., Wingfield, J.C., Social status and circulating levels of hormones in flocks of house sparrows, Passer domesticus (1987) Ethology, 76, pp. 1-14; Hogstad, O., It is expensive to be dominant (1987) Auk, 104, pp. 333-336; Social organisation and dominance behaviour in some Parus species (1989) Wilson Bull, 101, pp. 254-262; Holberton, R.L., Able, K.P., Wingfield, J.C., Status signaling in dark-eyed juncos, Junco hyemalis: Plumage manipulation and hormonal correlates of dominance (1989) Anim Behav, 37, pp. 681-689; Ja?rvi, T., Bakken, M., The function of the variation in the breast stripe of the great tit (Parus major) (1984) Anim Behav, 32, pp. 590-596; Ketterson, E.D., Aggressive behaviour in wintering dark eyed juncos: Determinant of dominance and the possible relation to geographic variation in sex ratio (1979) Wilson Bull, 91, pp. 371-383; Ketterson, E.D., Nolan, V., Seasonal, annual, and geographic variation in sex ratio in wintering population of dark-eyed juncos (Junco hyemalis) (1979) Auk, 96, pp. 532-536; Hormones and life histories: An integrative approach (1992) Am Nat, 140 (SUPPL.), pp. S33-S62; Ketterson, E.D., Nolan, V., Wolf, L., Ziegenfus, C., Dufty, A.M., Ball, G.F., Johnsen, T.S., Testosterone and avian life histories: The effect of experimentally elevated testosterone on corticosterone and body mass in dark-eyed juncos (1991) Horm Behav, 25, pp. 489-503; Kikkawa, J., Winter survival in relation to dominance classes among silvereyes Zosterops lateralis chlorocephala of heron island, Great Barrier Reef (1980) Ibis, 122, pp. 437-446; Koivula, K., Lathi, K., Rytko?nen, S., Orell, M., Do sub-ordinates expose themselves to predation? 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    ABSTRACT = { Studies of wintering birds have demonstrated a correlation between social rank and energy expenditures. It is assumed that dominance is energetically costly because of increased activity, possibly caused by elevated androgen levels. As winter acclimatization leads to an increase in metabolic rate, maintaining dominance status in a cold climate can be a substantial challenge. We measured resting metabolic rates in dominant and subordinate dark-eyed juncos (Junco hyemalis) living in small groups in a controlled winter environment. We found no significant effect of social rank when controlling for body size. It has been shown previously that high testosterone levels during the nonbreeding season can lead to higher body conductance, fat loss, and higher nocturnal body temperature. A hypothesis explaining our result is that for juncos it is preferable to maintain low androgen levels during winter and to maintain social rank using a mechanism other than higher agonistic activity. },
    KEYWORDS = { dominance energetics metabolism overwintering social structure basal metabolic rate social dominance Basal Metabolism Social Dominance Junco hyemalis },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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