KOPRI Repository

Does incubation capacity limits clutch size in south polar skuas Catharacta maccormicki

Metadata Downloads
Title
Does incubation capacity limits clutch size in south polar skuas Catharacta maccormicki
Other Titles
남극도둑갈매기의 한배산란수는 포란능력에 의해 제한되는가?
Authors
Kim, Jeong-Hoon
Park, Hyun
유정칠
Ahn, In-Young
Choy, Eun-Jung
Keywords
Antarctica; Catharacta maccormicki; egg temperature; hatchability; nest temperature
Issue Date
2009
Citation
Kim, Jeong-Hoon, et al. 2009. Does incubation capacity limits clutch size in south polar skuas Catharacta maccormicki. 한국조류학회. 한국조류학회. 2009.05.28~.
Abstract
Incubation ability has been suggested as an factor determining clutch size in birds. This hypothesis proposes that the number of brood patch could limit the maximum clutch size. To test this hypothesis, we measured egg temperature in the manipulated clutches (2 or 3-egg) of south polar skuas Catharacta maccormicki in a breeding site Antarctic region. South polar skuas had two brood patches. Clutch-size of South polar skua is 1-2 eggs normally. Four abnormal clutches of 3 eggs were found in Barton peninsula, King George Island, Antarctica during the three consecutive breeding seasons (2004-07), but the eggs of 3-egg clutches were not hatched at all. To look at the difference in the egg temperature between 2 and 3-egg clutches during the incubation period, we replaced all original egg from each clutches to two or three experimental eggs loaded dataloggers. Mean temperature of eggs in 2-egg clutches was significantly higher than that of 3-egg clutches. Fluctuations of egg temperature of 2-egg clutches in same clutch showed synchronous pattern with those of other egg. In 3-egg clutches, temperatures of two eggs tended to change synchronously and were higher compared to other single egg. Egg temperature of other single egg changed inversely with two eggs within same duration. However egg compositions showing synchronous egg temperature fluctuation were shifted randomly. The accumulated duration that egg temperature decreased to below 30 °C in 3-egg clutch was longer than in 2-egg clutch about eight times. Mean nest temperature when skuas incubated two eggs were higher than incubated three eggs. When one egg was added into 2-egg clutch, nest temperature decreased, compared with that of original clutches. The above results indicate that the clutch size in south polar skuas breeding in cold region is likely to be restricted by incubation capacity.
URI
http://repository.kopri.re.kr/handle/201206/7886
Conference Name
한국조류학회
Conference Place
한국조류학회
Conference Date
2009.05.28~
Files in This Item
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse