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

IF 0.8 4区生物学 Q3 ZOOLOGY

Mammal Study Pub Date : 2023-03-29 DOI:10.3106/ms2022-0055

Teppei Higashi, S. Kobayashi

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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

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琉球长毛鼠幼鼠(鼠科:啮齿目)被丛林乌鸦(鸦科:渡形目)捕食及巢移的记录

Abstract. The Ryukyu long-furred rat Diplothrix legata is endemic to The central Ryukyus and is Thelargest 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 byjungle crow Corvus macrorhynchos connectens in a nesting tree cavity. Our observations suggestthat jungle crows may be among the top predators in this area. On the same night On which the提前was observedadult Ryukyu long-furred rats carried juveniles away from the tree cavity. It is possible that theadult individual left their nest and moved to other sites to avoid further predation. Abstract inJapanese(摘要).流羽玻璃对幼兽毛鼠的捕食和巢穴移动的事例。毛长鼠是中琉球的特有种，是日本最大的树上性鼠类，被IUCN Red List指定为Endangered (EN)。外来食肉目被记录为本物种的捕食者，而本地捕食者的信息很少。我们在毛鼠的营巢树洞里，记录了九龙飞檐玻璃对毛鼠幼兽的捕获。这表明，飞毛腿玻璃在该地区的生态系统中，可能处于高级捕食者的位置。另外，当天晚上，一头成年毛鼠叼着一头幼兽离开了树洞。有可能是为了躲避幼兽的捕食而移动巢穴。

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来源期刊

Mammal Study ZOOLOGY-

CiteScore

1.70

自引率

20.00%

发文量

审稿时长

>12 weeks

期刊介绍： Mammal Study is the official journal of the Mammal Society of Japan. It publishes original articles, short communications, and reviews on all aspects of mammalogy quarterly, written in English.