Antarctic Bird Studies by Sharon Chester

By Sharon Chester

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Published through the yank Geophysical Union as a part of the Antarctic examine Series.

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Extra resources for Antarctic Bird Studies

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Exulans and D. epomophora predictedthat the wandererfledglingstaysashorean estimated50 days longer than the royal fledgling, Comwhich comesvery closeto the observeddifferenceof bined œ and Broodabout 44 days. Sorensen's[1950] figures for the ing Shifts N 1-4 296 5-8 296 9+ 302 1-4 28 5-8 28 9+ 53 SE, days SD Range SE of Difference CampbellIsland royals,216 to 252 days,correspond with the longestof Richdale'sat Taiaroa Head, 242 D. 032 • Table 26. Comparisonof 818 Brooding Shifts of D. 032]D. 95 1-5]' * Richdale, 1952, p.

Feb. 36 Feb. 27-Mar. 29 Copyright American Geophysical Union 2-Mar. 28-Mar. 27-Mar. 27-Mar. 22 20 29 28 Antarctic Research Series Antarctic Bird Studies Vol. •- ß 60 y //' 40. 28 /o 20- .. FEB 28 • •' 11 MAR. 15 19 23 27 2ND. HATCHING Fig. 29. Hatchingdatesof D. exulanschicksof femaleswith 1 10 MAR. 2'0 30 the same ( ß ) and different (X) mates in successiveseasons. catesa tendencyfor individualexulanspairsto breed slightlylater in subsequent seasons. Fig. 28. D. exulanshatchingsobservedin the extendedstudy area at Bird Island on daily I proposed earlierthat the individuallayingperiod visits during four seasons.

17 Copyright American Geophysical Union Antarctic Research Series Antarctic Bird Studies Vol. 12 BIOLOGY OF THE GREAT ALBATROSSES 23 TABLE 10. DifferencesBetweenMean Laying Dates of The GoughIsland wandererslay later than thoseat South Georgia. Comer [Verrill, 1895] reportedfirst eggs there on December26, and Swales [1965] on Difference between January9 (Table 11). 01 those at Campbell Island lay approximatelythree weekslater, from late Novemberto early December birdslayingin thesetwo odd-yearseasons are mostly (Table 13).

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