Yoon Jongmin, Ha Hae-Sook, Jung Jung-Shim, Park Shi-Ryong
1 Ecological Institute for Oriental Stork, Korea National University of Education, Cheongju 363-791, Republic of Korea.
2 Indong High School, Gumi, Gyeongbuk 730-300, Republic of Korea.
Zoolog Sci. 2015 Aug;32(4):331-5. doi: 10.2108/zs140178.
Parental behaviors that vary by sex and breeding stage facilitate the survival of offspring in birds. Females invest in reproducing according to the level of direct and/or indirect benefits provided by males. Males face trade-offs from defending territories or nests, providing for the young, and seeking additional mating opportunities. We examined whether post-mating sexual behaviors such as courtship display and nest-building were associated with reproductive investments made by males and females in the current study. The oriental stork (Ciconia boyciana) is known as a solitary breeder that nests in tall trees and provides biparental care with long post-hatching development. We filmed parental behaviors in seven stork pairs in captivity for 655 hours (245 hours during nest-building, 218 hours during incubation, 328 hours during nestling, and 192 hours during the fledgling period). We found that paired mating behaviors such as synchronous allopreening and bill-clattering were highly skewed to the pre-incubation period. Males participated in nest-building more than females although both sexes shared similar parental care during the incubation and nestling period. Male nest-building was negatively correlated with male nest attentiveness only during the nestling period. Our results suggest that male oriental storks with higher nest-building effort might spend more time taking precautions against conspecific intruders or nest predators near the nests with chicks while the females were attending the nests in the form of biparental care.
因性别和繁殖阶段而异的亲代行为有助于鸟类后代的存活。雌性根据雄性提供的直接和/或间接利益水平来投入繁殖。雄性在保卫领地或巢穴、养育幼雏以及寻求额外交配机会之间面临权衡。在本研究中，我们调查了诸如求偶展示和筑巢等交配后的性行为是否与雄性和雌性的生殖投资有关。东方白鹳（Ciconia boyciana）是一种已知的独居繁殖者，在高大树木上筑巢，并在孵化后进行长时间的双亲育雏。我们在圈养环境中对七对白鹳的亲代行为进行了655小时的拍摄（筑巢期间245小时、孵化期间218小时、雏鸟期328小时、幼鸟期192小时）。我们发现，同步互理羽毛和喙敲击等成对交配行为在孵化前期高度倾斜。虽然在孵化期和雏鸟期两性提供的亲代照料相似，但雄性比雌性更多地参与筑巢。仅在雏鸟期，雄性筑巢与雄性对巢穴的关注度呈负相关。我们的结果表明，筑巢努力较高的雄性东方白鹳可能会花更多时间防范巢穴附近的同种入侵者或巢穴捕食者，而此时雌性则以双亲照料的形式在巢中照料雏鸟。
