Title page for etd-0120109-140644


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URN etd-0120109-140644
Author Yu-hung Lin
Author's Email Address tarotarolin@gmail.com
Statistics This thesis had been viewed 4584 times. Download 558 times.
Department Biological Sciences
Year 2008
Semester 1
Degree Master
Type of Document
Language English
Title Nest Recognition of Black-naped Tern (Sterna sumatrana) and Roseate Tern (Sterna dougallii)
Date of Defense 2009-01-07
Page Count 54
Keyword
  • Penghu
  • tern
  • nest recognition
  • Abstract Terns usually will aggregate in the same reproduction area during breeding season. The color pattern of eggs may match the background, and it is important for breeding adults to distinguish their own eggs, especially in colonies with high density. This research was carried out at three islands, Huolung Shoal, Baisha and Jishan Islets of Penghu from May to August of 2007 and 2008. The experiment was divided into three parts, egg moving (EM) experiment, nest modification (NM) experiment and egg switching (ES) experiment. Terns spent more time for searching their own nests of each of the experiment situation. In the EM experiment 69.7% Black-naped Tern adults settled on original nests without eggs in 2007; 52.0% Roseate Tern in 2007 and 29.6 % in 2008 did the same. In the NM experiment, the behavior patterns of returning adults were significantly different between each operation and the control group. Adults were confused by the interference of the experimental conditions. In some occasions, adults settled on incorrect eggs quietly in ES experiment. In conclusion, terns have low ability of egg recognition but high ability of nest recognition. Terns presumably can recognize nests with the nearby environmental landmarks, but not be able to recognize eggs.
    Advisory Committee
  • Hin-Kiu Mok - chair
  • Ying Wang - co-chair
  • Hsueh-Wen Chang - advisor
  • Files
  • etd-0120109-140644.pdf
  • indicate in-campus access immediately and off_campus access in a year
    Date of Submission 2009-01-20

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