Winter Diet of the Raccoon Dog (<i>Nyctereutes procyonoides</i>) in Urban Parks, Central Tokyo

Enomoto, Takaaki; Saito, Masaichi; Yoshikawa, Masahiro; Kaneko, Yayoi

doi:10.3106/ms2018-0024

Cited by 12 publications

(11 citation statements)

References 7 publications

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“…The results seem reasonable given the geographical characteristics of the study area. In addition, the results seem to be consistent with previous studies showing that raccoon dogs are generalists who eat a wide range of diets available in their habitat [ 11 , 12 , 15 – 17 , 41 ].…”

Section: Discussionsupporting

confidence: 90%

“…In addition, there may be limitations specific to dietary analysis of omnivorous animals such as raccoon dogs. First, the raccoon dog is an omnivorous carnivore that also eats plants [ 11 , 12 , 15 – 17 , 41 ]. However, this study focused on the animal diets and does not report the plant diets.…”

Section: Discussionmentioning

confidence: 99%

“…The raccoon dog is opportunistically feeding on plants, invertebrates, fishes, amphibians, reptiles, birds, and small mammals [ 10 – 17 ]. Through such predation and feeding, the raccoon dog is thought to directly and indirectly affect the ecosystem [ 18 , 19 ], and by investigating their predation and feeding behavior, we can gain better understandings of their involvement in ecosystem functions.…”

Section: Introductionmentioning

confidence: 99%

“…To investigate their predation and feeding habits, the fecal contents are often surveyed. To date, many studies have been reported on the fecal analysis of raccoon dogs in countries such as Belarus [ 11 ], Denmark [ 12 ], Finland [ 13 , 14 ], Germany [ 15 , 16 ], and Japan [ 10 , 17 , 20 – 22 ]. However, all of these studies rely on morphological observations of undigested remains of fruits, seeds, hair, skin, feathers, bones, and so on.…”

Section: Introductionmentioning

confidence: 99%

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Using DNA metabarcoding and a novel canid-specific blocking oligonucleotide to investigate the composition of animal diets of raccoon dogs (Nyctereutes procyonoides) inhabiting the waterside area in Korea

Woo

Kumari

et al. 2022

PLoS ONE

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The raccoon dog (Nyctereutes procyonoides) is known to be an opportunistic generalist who feeds on a wide variety of foods. Historically, their diet has been investigated by morphological observation of undigested remains in feces, requiring specialized knowledge such as osteology, zoology, and phytology. Here, we used DNA metabarcoding of vertebrate 12S rRNA gene and invertebrate 16S rRNA gene to investigate their fecal contents. Additionally, we developed a blocking oligonucleotide that specifically inhibits the amplification of the canid 12S rRNA gene. We confirmed that the blocking oligonucleotide selectively inhibit the amplification of raccoon dog’s DNA without significantly changing the composition of the preys’ DNA. We found that the main foods of raccoon dogs in our study area, the waterside of paddy fields in Korea, were fishes such as Cyprinidae and insects such as mole crickets, which makes sense given the Korean fauna and their well-known opportunistic feeding behaviors. As a method to conveniently and objectively investigate feeding habits of raccoon dogs, this study provided baseline information on DNA metabarcoding. By using DNA metabarcoding, it is expected that the diet habits and ecology of raccoon dogs will be better understood by future research.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Using DNA metabarcoding and a novel canid-specific blocking oligonucleotide to investigate the composition of animal diets of raccoon dogs (Nyctereutes procyonoides) inhabiting the waterside area in Korea

Woo

Kumari

et al. 2022

PLoS ONE

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“…For example, foxes have large jaws and robust crania, enabling a strong bite force (Forbes‐Harper et al, 2017)—a trait important for carnivory (and incidentally frugivory) (Christiansen & Wroe, 2007). Red fox bite force adjusted for body mass is stronger than that of raccoon dogs ( Nyctereutes procyonoides ) and Eurussian badgers ( Meles meles ), both of which are more insectivorous and typically eat soft prey including earthworms (Enomoto et al, 2018; Kaneko et al, 2006; Yamamoto, 1994). Yet, the red fox bite force is weaker than that of martens ( Martes spp.)…”

Section: Discussionmentioning

confidence: 99%

Red foxes in Japan show adaptability in prey resource according to geography and season: A meta‐analysis

Hisano

Evans

Soga

et al. 2021

Ecological Research

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The red fox (Vulpes vulpes) is the world's most widespread member of the order Carnivora, occurring across a large range of latitudes and inhabiting multiple habitat types. There is no comprehensive study of how the diets of this flexible generalist vary across the whole Asian continent. We conducted a meta‐analysis of red fox diets in Japan, examining the patterns in food type selection and their associations with seasonality, regional climate, vegetation productivity, and human influences at the national scale. Using linear mixed models, we revealed significant seasonal effects on the frequency of occurrence of mammals in general, ungulate carcasses, birds, and invertebrates in the diets of red foxes. Furthermore, the frequency of occurrence of mammals significantly decreased with mean annual temperature and increased with vegetation productivity. The frequency of invertebrate occurrences increased with temperature, and that of anthropogenic foods increased with human population density. Trophic diversity and dietary niche breadth increased with annual temperature but decreased with vegetation productivity and population density. These results suggest that the red fox is a flexible predator in Japan that adapts its foraging patterns according to variations in resource availability and abiotic conditions, while persistently consuming a certain ratio of animal prey to meet its metabolic requirements. Modifications of predators' trophic niches can influence structures of prey communities and interactions with sympatric competitors. Our findings are important for informing ecosystem management practices under ongoing environmental and social changes in Japan.

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City Dwellers: Earthworms in Urban Ecosystems

Schmidt

2024

Earthworms and Ecological Processes

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Winter Diet of the Raccoon Dog (Nyctereutes procyonoides) in Urban Parks, Central Tokyo

Cited by 12 publications

References 7 publications

Using DNA metabarcoding and a novel canid-specific blocking oligonucleotide to investigate the composition of animal diets of raccoon dogs (Nyctereutes procyonoides) inhabiting the waterside area in Korea

Using DNA metabarcoding and a novel canid-specific blocking oligonucleotide to investigate the composition of animal diets of raccoon dogs (Nyctereutes procyonoides) inhabiting the waterside area in Korea

Red foxes in Japan show adaptability in prey resource according to geography and season: A meta‐analysis

City Dwellers: Earthworms in Urban Ecosystems

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