국내 내륙 지역에서 번식하는 두견이아과 조류 개체군의 소리 표출 활동에 나타나는 시기적 특성에 대한 연구 = The periodic characteristics of population vocal activity in Cuculinae species breeding in mainland South Korea

다국어 초록 (Multilingual Abstract)

The vocal activity of bird populations is closely related to their breeding cycle, time of day, and habitat factors. We obtained U vocal activity data from four Cuculus species and one Hierococcyx species in three regions: the Deogyu, Songni, and Chiak Mountains in 2018 using passive acoustic recordings. Consistent with recent studies, the five Cuculinae species demonstrated seasonal fluctuations in vocal activity, reaching a rapid peak in the early season, followed by many structured seasonal patterns. The daily peak of vocal activity was observednoted at dawn, followed by that at dusk. The Rufous Hawk-Cuckoo H. hyperythrus demonstrated more active vocal behavior at night than during the day, and nocturnal vocal activity was recorded in other species as well, but not as intensely. Species differences in nocturnal vocal activity may result from different effects of habitat characteristics and inter-specific competition. Our results suggest that the population vocal activity of brood parasites may be influenced by various factors as well as the breeding cycle, for which future studies are necessary.

국문 초록 (Abstract)

조류 개체군의 소리 표출량은 번식 행동과 밀접한 관련이 있으며, 번식 주기, 일주기, 지역 환경의 특징에 따라 다르게 나타난다. 본 연구에서는 2018년 번식기 동안 탁란으로 인해 번식 주기가 단순한 두견이속 4종과 매사촌속 1종의 소리를 수집하여 3개 지역(덕유산, 속리산, 치악산)에 걸쳐 나타나는 개체군 각각의 소리 표출량을 조사하였다. 5종의 두견이아과 조류는 번식기 초반에 소리활동이 활발했다가 이후 여러 번의 피크를 반복하며 줄어드는, 상당한 계절적 증감 추이를 보였다. 하루 중에는 이른 오전과 늦은 오후 시간대 밀집도를 보여주었다. 매사촌은 야간에 주간보다 더 활발한 소리활동을 하였으며, 다른 종에서도 야간 소리활동이 관찰되었지만 활발하지는 않았다. 종마다 서로 다른 야간 기록의 차이는 서식지의 물리적 특성과 종간 경쟁에 의한 결과일 것으로 사료된다. 이러한 연구 결과는 탁란조류에서 개체군 수준의 소리활동이 번식주기 외에 다양한 요인들에 의해 영향을 받는다는 것을 보여주며, 향후 이에 대한 연구가 필요한 것으로 판단된다.

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