Variations in the Reproductive Activities of Arctic Terns at Churchill, Manitoba | Zendy

Roger M. Evans | Zendy; Martin K. McNicholl | Zendy

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Variations in the Reproductive Activities of Arctic Terns at Churchill, Manitoba

Author(s) -

Roger M. Evans,

Martin K. McNicholl

Publication year - 1972

Publication title -

arctic

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.503

H-Index - 59

eISSN - 1923-1245

pISSN - 0004-0843

DOI - 10.14430/arctic2952

Subject(s) - avian clutch size , tern , arctic , clutch , ecology , environmental science , breakup , nest (protein structural motif) , the arctic , biology , laying , zoology , reproduction , oceanography , geology , physics , biochemistry , astronomy , mechanics , thermodynamics

Nest locations and contents were observed in 16 colonies over a 3-year period. Laying times correlated with spring temperatures, but not with colony size. Clutch size increased with time between ice breakup and laying onset. Egg losses were insufficient to account for differences in clutch size. The results are taken to indicate that under arctic conditions, variations in clutch size, timing of the nesting cycle, and associated events in the Arctic Tern are closely related to variations in the physical environment.

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