Articles 1975 - 1979

  • Hedgren, S. (1979) "Seasonal variation in fledging weight Guillemots Uria aalge" Ibis 121(3):356-361
  • Hedgren, S. & Linnman, A. (1979) "Growth of guillemot Uria aalge chicks in relation to time of hatching" Ornis Scan. 10:29-36
  • Mahoney, S.P. (1979) "Breeding biology and behaviour of the Common Murre Uria aalge (Pont.) on Gull Island, Newfoundland" M.Sc. thesis, Memorial Uni., St John's Newfoundland 155pp.
  • Tschanz, B. (1979) "Helfer-Beziehungen bei Trottellummen" Zeitschrift für Tierpsychologie 49(1):10-34
    [notes] Observations on murres on Vedoy (63°30′ 12° E) from 1956 to 1975 and systematic investigations in order to analyze helping relationships in 62 breeding pairs and 30 chicks during 196 h of observation gave the following results: The attempt of each breeding pair to protect its only egg or chick results in helping neighbours with the defense against approaching birds of prey. The occurrence of brooding helpers is excluded as, from the different looking eggs, each brooder is only able to retrieve its own. After the loss of an own egg or chick adults may take strange chicks under their wing. To be fed these go back to their own parents. Helping behavior in murres is non-altruistic, and favors the selection of the individual but not the selection of the tribe.
  • Varoujean, D.H., Sanders, S.D., Graybill, M.R. & Spear, L. (1979) "Aspects of Common Murre breeding biology" Pacific Seabird Group Bulletin 6:28
  • 1978

  • Birkhead, T.R. (1978) "Attendance patterns of Guillemots Uria aalge at breeding colonies on Skomer Island" Ibis 120(2):219-229
  • Birkhead, T.R. (1978) "Behavioural adaptations to high density nesting in the Common Guillemot, Uria aalge" Anim Behav 26:321-331
  • 1977

  • Birkhead, T.R. (1977) "Adaptive significance of the nestling period of Guillemots, Uria aalge" Ibis 119:544-549
  • Birkhead, T.R. (1977) "The effect of habitat and density on breeding success in the Common Guillemot Uria aalge" J. Animal Ecol. 46:751-764
  • Birkhead, T.R. & Hudson, P.J. (1977) "Population parameters for the Common Guillemot Uria aalge" Ornis Scan. 8:145-154
  • Birkhead, T.R. & Taylor, A.M. (1977) "Moult of the Guillemot Uria aalge" Ibis 119:80-85
  • Swennen, C. (1977) "Laboratory research on sea-birds" Netherlands Institute for Sea Research, Texel
  • Wehrlin (1977) "Verhaltendanpassungen junger Trottellummen [Uria aalge aalge (Pont.)] ans Felsklippen - und Koloniebruten" Zeitschrift fur Tierpsychologie 44:45-79
  • 1976

  • Ainley, D.G. (1976) "The occurrence of seabirds in the coastal region of California" Western Birds 7:33-68
  • Birkhead, T.R. (1976) "Effects of sea conditions on the rate at which guillemots feed chicks" British Birds 69:490-492
  • Birkhead, T.R. (1976) "Breeding biology and survival of Guillemots Uria aalge" Unpublished D.Phil. thesis, Univeristy of Oxford, Oxford 204pp
  • Jefferies, D.J. & Parslow, J.L.F. (1976) "The genetics of bridling in guillemots from a study of hand-reared birds" J. Zool. (Lond.) 179(3):411-420
  • Slater, P.J.B. (1976) "Tidal rhythm in a seabird" Nature 264:636-638
  • 1975

  • Johnson, S.R. & West, G.C. (1975) "Growth and development of heat regulation in nestlings, and metabolism of adult Common and Thick-billed Murres" Ornis Scan. 6:109-115
  • Lloyd, C. (1975) "Timing and frequency of census counts of cliff-nesting auks" British Birds 68(12):507–513
  • Van der Steen, L.J. (1975) "Verschillen in gedrag tussen beide seksen van de zeekoet (Uria aalge (Pontopp.))" NIOZ-rapport, 1975(12) 15 pp
    [notes] Guillemots (Uria aalge) do not show any external sexual dimorphism. In the present research in a colony of captive guillemots the differences in behaviour between male and female birds have been studied. The birds were sexed before with the aid of gaschromatographic analyses of blood plasma. The following differences in behaviour have been observed. -The male guillemots occupy the eventual nesting territory before the females. In the greeting ceremony the males show dominant agressive components in their behaviour, the females show submissive behaviour. -Generally speaking the male is the first bird to show courtship-display as an introduction to copulation. -The male is promiscuous, the female partner less so or not at all. In promiscuous situations a male guillemot tends to approach a female while showing agressive display, after which the male makes a special appeasement gesture: the "pole-attitude". -In conflicts between partners the female shows submissive behaviour.
  • Williams, A.J. (1975) "Guillemot fledging and predation on Bear Island" Ornis Scan. 6:117-124