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Mammal Study
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A Record of Predation of a Juvenile Ryukyu Long-Furred Rat Diplothrix legata (Muridae: Rodentia) by a Jungle Crow Corvus macrorhynchos (Corvidae: Passeriformes) and Related Nest Movement
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UniBio Press
Abstract
Abstract.
The Ryukyu long-furred rat Diplothrix legata is endemic to the central Ryukyus and is the largest arboreal murid in Japan. This species is listed as ‘Endangered’ in the IUCN Red List. Invasive mammalian carnivores have been recorded as predators of this species; however, information on native predators is limited. We observed a juvenile Ryukyu long-furred rat caught by a jungle crow Corvus macrorhynchos connectens in a nesting tree cavity. Our observations suggest that jungle crows may be among the top predators in this area. On the same night on which the predation was observed, adult Ryukyu long-furred rats carried juveniles away from the tree cavity. It is possible that the adult individual left their nest and moved to other sites to avoid further predation.
Abstract in Japanese（要旨）． リュウキュウハシブトガラスによるケナガネズミの幼獣の捕食と巣の移動事例． ケナガネズミは中琉球の固有種で，日本で最大の樹上性ネズミ類であり，IUCN Red List で Endangered（EN） に指定されている．本種の捕食者としては，外来食肉目が記録されているが，在来捕食者の情報は少ない．我々 はケナガネズミの営巣樹洞において，リュウキュウハシブトガラスによるケナガネズミの幼獣の捕獲を記録 した．ハシブトガラスが本地域の生態系の中で，上位捕食者として位置する可能性が示唆された．また，同 日夜，ケナガネズミの成獣が残った幼獣を 1 頭ずつくわえて樹洞から出ていった．幼獣の捕食回避のために 巣の移動をした可能性がある
