시즌 2-2. 남극세종기지의 펭귄마을 이야기

[이원영]

안녕하세요,

오늘은 남극세종기지의 주변에 위치한 펭귄마을의 이야기를 위주로 다루었습니다.

이 지역은 ASPA(Antarctic Specially Protected Area) 171번으로 지정되어 대한민국의 보호와 관리하에 있는 지역으로, 젠투펭귄과 턱끈펭귄이 대규모로 번식하는 지역입니다.

이번에 다룬 논문도 이 지역에 서식하는 젠투펭귄과 턱끈펭귄을 연구한 논문인데요, 관심있으신 분들은 찾아서 읽어보시기 바랍니다.

감사합니다. ^^

http://file.ssenhosting.com/data1/west210/season0202.mp3

Marine Biology

April 2010, Volume 157, Issue 4, pp 811-825

Comparison of diving behavior and foraging habitat use between chinstrap and gentoo penguins breeding in the South Shetland Islands, Antarctica

• Nobuo Kokubun, 
• Akinori Takahashi, 
• Yoshihisa Mori, 
• Shinichi Watanabe, 
• Hyoung-Chul Shin

Abstract

Chinstrap, Pygoscelis antarctica, and gentoo, P. papua, penguins are sympatric species that inhabit the Antarctic Peninsula. To eval‎uate differences in the foraging habitat of these two species, we recorded their foraging locations and diving behavior using recently developed GPS-depth data loggers. The study was conducted on King George Island, Antarctica during the chick-guarding period of both species, from December 2006 to January 2007. The area used for foraging, estimated as the 95% kernel density of dive (>5 m) locations, overlapped partially between the two species (26.4 and 68.5% of the area overlapped for chinstrap and gentoo penguins, respectively). However, the core foraging area, estimated as the 50% kernel density, was mostly separate (12.8 and 25.0% of the area overlapped for chinstrap and gentoo penguins, respectively). Chinstrap penguins tended to use off-shelf (water depth > 200 m) regions (77% of the locations for dives >5 m), whereas gentoo penguins mainly used on-shelf (water depth < 200 m) areas (71% of dive locations). The data on foraging locations, diving behavior, and bathymetry indicated that gentoo penguins often performed benthic dives (28% of dives >5 m), whereas chinstrap penguins almost always used the epipelagic/mid-water layer (96% of dives >5 m). Diving parameters such as diving bottom duration or diving efficiency differed between the species, reflecting differences in the use of foraging habitat. The diving parameters also suggested that the on-shelf benthic layer was profitable foraging habitat for gentoo penguins. Conversely, the relationship between trip duration, date, and stomach content mass suggested that the chinstrap penguins went further from the colony to forage as the season progressed, possibly reflecting a reduction in prey availability near the colony. Our results suggest that chinstrap and gentoo penguins segregated their foraging habitat in the Antarctic coastal marine environment, possibly due to inter- and intra-specific competition for common prey resources.

시즌 2-2. 남극세종기지의 펭귄마을 이야기