Remigial and rectricial molt sequences in a captive Ryukyu Scops-Owl (Otus elegans)
Remigial and rectricial molt sequences in a captive Ryukyu Scops-Owl (Otus elegans)
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圈养琉球角鸮（Otus elegans）的弯毛和直毛蜕皮过程
DOI：
10.1676/1559-4491-131.4.828
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
M. Takagi
中科院分区：
文献类型：
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作者：
Kana Akatani;M. Takagi
摘要本文描述了圈养在日本南部南洋群岛南大岛的琉球白头鹰(Otus Elegans)的垂直性和垂直性蜕皮序列。猫头鹰在其形成前的蜕皮和连续3年的明确的基础前蜕皮期间，完全摆脱了它的标志和直毛。在前期蜕皮中，初级蜕皮都是在10月、11月和12月之间脱落的，从P1开始。虽然4组次生虫都是近端脱落的，但这种序列可能是圈养条件下的不定脱落造成的。在明确的基础前蜕皮期间，6-9月期间，初级毛细胞按远端顺序脱落。从4个羽毛组的3个节处脱落次生毛，其中3个组按近端顺序脱落，其余的组按远端顺序脱落。在明确的基础前蜕皮期间，初级羽毛与其对应的初级羽毛以完全相同的顺序脱落，但在预成形性蜕皮期间，它们以不同的顺序脱落。较大的隐窝在初级隐蔽蜕皮的早期没有规律地脱落，而中间的隐窝在初级隐蔽蜕皮的前半部分脱落。芦荟的羽毛在几周的时间里向远端脱落。右直肌短时间内(12天)不规则地脱落，左直肌长时间(至少82天)脱落。圈养的琉球猫头鹰的脱落序列基本上遵循了之前在Strigidae物种中观察到的已知模式。被圈养的个体在幼年时期经历了完全的蜕皮，这是因为提供了足够的食物，而且可能是因为关在笼子里的能量需求较低。
ABSTRACT We describe the remigial and rectricial molt sequences of a Ryukyu Scops-Owl (Otus elegans) held in captivity on Minami-daito Island, Nansei Islands, southern Japan. The owl completely shed its remiges and rectrices during its preformative molt as well as during its definitive prebasic molts in 3 consecutive years. In the preformative molt, the primaries were all shed during October, November, and December, in distal order from P1. Although all 4 groups of secondaries were shed in proximal order, the sequence may have been caused by adventitious shedding under captive conditions. During definitive prebasic molt, the primaries were shed in distal order during the period from June to September. The secondaries were shed from 3 nodes in 4 feather groups; 3 groups were shed in proximal order, but the remaining group was shed in distal order. The primary coverts were shed in exact sequence with their corresponding primaries during the definitive prebasic molt, but in a different sequence during the preformative molt. Whereas the greater coverts were shed irregularly during the early part of the primary covert molt, the median coverts were shed during the first half of the primary covert molt. The alula feathers were shed distally over a period of weeks. The right rectrices were shed in irregular order over a short period (12 days) and the left rectrices were shed over a long period (at least 82 days). The shedding sequence of the captive Ryukyu Scops-Owl basically followed the known pattern previously observed in Strigidae species. The captive individual underwent a complete molt when it was a juvenile as a result of being provided with sufficient food, and presumably because of the lower energy demands of being in a cage.
2006年南大东岛领地雄性大东角鸮数量急剧减少
DOI：
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发表时间：
2007
期刊：
Ornithological Science 6
影响因子：
--
作者：
Takagi M;Akatani K;Saito A & Matsui S
通讯作者：
Saito A & Matsui S
DOI：
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发表时间：
2007
期刊：
Journal of Raptor Research (印刷中)
影响因子：
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作者：
Takagi M;Akatani K;Matsui S;Saito A
通讯作者：
Saito A