Winter diet of the raccoon dog (Nyctereutes procyonoides) in urban parks, central Tokyo
Winter diet of the raccoon dog (Nyctereutes procyonoides) in urban parks, central Tokyo
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DOI：
10.3106/ms2018-0024
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发表时间：
2018-12-01
期刊：
影响因子：
1
通讯作者：
Kaneko, Yayoi
中科院分区：
文献类型：
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作者：
Enomoto, Takaaki;Saito, Masayuki U.;Kaneko, Yayoi
在冬季，利用粪便分析法对两个城市公园的浣熊犬（Nyctereutes procyonoides）的饮食进行了研究。从2015年12月至2016年3月，我们从位于东京市中心的新宿御苑（n = 31）和富山公园（n = 8）的14个厕所收集了39份浣熊狗粪便。样本采用手工分类法进行分析，并计算每种食物的出现频率。结果发现，种子（97.4%）、鸟类（48.7%）和蚯蚓（48.7%）是主要食物。果实中检出的种子主要有枳（56.4%）、朴（35.9%）、黄蜀葵（25.6%）和柿（20.5%）。这些都是园林绿化和城市绿化种植的树种。捕食鸟类主要有雀形目（20.5%）、翼手目（7.7%）和喙科（7.7%）。与其他研究相比，水果不仅是城市公园的主要食物，而且也是城市其他环境和山区冬季的主要食物。另一方面，鸟类在城市环境中比山区消费更多，因此冬季城市和山区之间的动物性食物项目的可用性可能不同。
We studied the diet of the raccoon dogs (Nyctereutes procyonoides) in the two urban parks by fecal analysis in winter, when their nutritional condition is important for breeding. From December 2015 to March 2016, we collected 39 feces from 14 latrines for defecation of raccoon dogs in the Shinjuku Gyoen National Garden (n = 31) and the Toyama Park (n = 8), located in central Tokyo. The samples were analyzed by the hand sorting method, and the frequency of occurrence for each food item was calculated. As a result, seeds (97.4%), birds (48.7%), and earthworms (48.7%) were detected as main food items. Major seeds of fruits detected were Hovenia dulcis (56.4%), Celtis sinensis (35.9%), Aphananthe aspera (25.6%), and Diospyros kaki (20.5%). These were planted tree species for gardens and urban greening. Preyed birds consisted mainly of Passeriformes (20.5%), Podicipedidae (7.7%), and Phalacrocoracidae (7.7%). Compared with other studies, fruits were main food items in not only urban parks but also other urban environments and mountain areas in winter. On the other hand, birds were more consumed in urban environments than mountain area, and therefore the availability of animal food items may be different between urban and mountain areas in winter.