領角鴞和黑冠麻鷺繁殖期與氣溫的相關性

Relationships between Air Temperature and Reproduction Timing for Collard Scops Owl (Otus bakkamoena) and Malayan Night Heron (Gorsachius melanolophus)

洪孝宇(Shiao-Yu Hong) ； 詹芳澤(Feng-Tse Chan) ； 林依蓉(Yi-Jung Lin) ； 林佩羿(Pei-I Lin) ； 王齡敏(Ling-Min Wang) ； 黃獻文(Hsien-Wen Huang)

《台灣生物多樣性研究》 12卷1期 (2010/01) Pp. 15-28

https://doi.org/10.7064/TJB.201001.0015

摘要

As global warming has drawn our increasing concerns, many studies have focused on whether climate change would affect the timing of wildlife reproduction. We used orphaned nestling data of two avian species, the Collard scops owl (Otus bakkamoena) and the Malayan night heron (Gorsachius melanolophus), obtained by the Wildlife First Aid Station of the Endemic Species Research Institute of Taiwan to analyze the relationships between air temperatures and their reproduction timing. A growth curve model was built and daily growth rate by weight of each of the species was determined with the data of captive nestlings at the station. Egg deposition date of each of the orphaned nestlings was then estimated with the growth model. There were 133 orphaned nestlings of the Collard scops owl from Central Taiwan for nine years and 56 nestlings of the Malayan night heron for five years. A regression analysis was conducted between the estimated egg deposition dates and the monthly average air temperatures prior to the breeding seasons. The egg deposition dates were significantly correlated with the average air temperatures of the months of previous November (p＜0.05) for the Collard scops owl, and previous December (p＜0.01) for the Malayan night heron. When monthly average air temperatures of these months rose, the egg deposition dates of the two species proceeded earlier in the following year. Further studies are needed to examine whether other avian species have the same trend of air temperature and breeding time relationship and what is the mechanism.

關鍵字

全球暖化 ； 氣溫 ； 繁殖時間 ； 落巢幼鳥 ； 生長曲線

並列摘要

As global warming has drawn our increasing concerns, many studies have focused on whether climate change would affect the timing of wildlife reproduction. We used orphaned nestling data of two avian species, the Collard scops owl (Otus bakkamoena) and the Malayan night heron (Gorsachius melanolophus), obtained by the Wildlife First Aid Station of the Endemic Species Research Institute of Taiwan to analyze the relationships between air temperatures and their reproduction timing. A growth curve model was built and daily growth rate by weight of each of the species was determined with the data of captive nestlings at the station. Egg deposition date of each of the orphaned nestlings was then estimated with the growth model. There were 133 orphaned nestlings of the Collard scops owl from Central Taiwan for nine years and 56 nestlings of the Malayan night heron for five years. A regression analysis was conducted between the estimated egg deposition dates and the monthly average air temperatures prior to the breeding seasons. The egg deposition dates were significantly correlated with the average air temperatures of the months of previous November (p＜0.05) for the Collard scops owl, and previous December (p＜0.01) for the Malayan night heron. When monthly average air temperatures of these months rose, the egg deposition dates of the two species proceeded earlier in the following year. Further studies are needed to examine whether other avian species have the same trend of air temperature and breeding time relationship and what is the mechanism.

並列關鍵字

global warming ； air temperature ； breeding time ； orphaned nestling ； growth curve