WACHI Nakatada

写真a

Title

Assistant Professor

Researcher Number(JSPS Kakenhi)

40635299
3 6 6 6 6
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Current Affiliation Organization 【 display / non-display 】

  • Duty   University of the Ryukyus   Tropical Biosphere Research Center   Assistant Professor  

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Research Interests 【 display / non-display 】

  • Molecular Ecology

  • Insect Taxonomy

  • Population Genetics

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Research Areas 【 display / non-display 】

  • Life Science / Biodiversity and systematics

  • Life Science / Ecology and environment

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Published Papers 【 display / non-display 】

  • Records of Atractomorpha lata (Motschoulsky, 1866) (Orthoptera, Pyrgomorphidae) from Okinawajima Island for the first time in 12 years and verification of several observational records by the citizen science community

    Wachi, Nakatada, Kohama, Tsuguo

    Fauna Ryukyuana   71   7 - 13   2025.01 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    The grasshopper Atractomorpha lata (Motschoulsky, 1866) has been considered rare in Okinawajima Island and has not been formally documented there since 2011. This study records this species based on recently collected specimens from Okinawajima Island. We also examined several records of Atractomorpha species from Okinawa Prefecture reported by the citizen science community, “iNaturalist," and compiled a detailed list of Atractomorpha species from Okinawajima Island.

  • New Distributional Record of Charops bicolor (Szépligeti, 1906) from the Yaeyama Islands, Okinawa, Japan

    Nakatada Wachi, Kazuhiko Konishi

    Japanese Journal of Systematic Entomology   30 ( 2 ) 284 - 292   2024.12 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    Charops bicolor (Szépligeti, 1906) (Hymenoptera: Ichneumonidae: Campopleginae) was collected from Iriomote Island, Okinawa, Japan, and is reported here the first record from both the Yaeyama Islands and the island itself. This represents the second known record of the species in the Nansei Islands, following a previous record from Tarama Island, the Miyako Islands, Okinawa, Japan. A list of known lepidopteran hosts of this species in Japan is provided, along with twelve potential hosts candidates on Iriomote Island.

  • A new distributional record of Hymenoptychis sordida Zeller, 1852 (Lepidoptera, Crambidae, Spilomelinae) from the Yaeyama Islands, Okinawa Prefecture, Japan

    Wachi, Nakatada, Matsui, Yuki

    Fauna Ryukyuana   69   39 - 41   2024.05 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    Hymenoptychis sordida Zeller, 1852 (Lepidoptera, Crambidae, Spilomelinae) was collected from mangroves of Iriomotejima Island and is reported here as the first record from the Yaeyama Islands as well as the island. This is the second record of this species in Japan, following the first record from mangroves of Okinawajima Island 18 years ago.

  • Seasonal diet partition among top predators of a small island, Iriomote Island in the Ryukyu Archipelago, Japan.

    Tobe A, Sato Y, Wachi N, Nakanishi N, Izawa M

    Scientific reports ( Scientific Reports )  14 ( 1 ) 7727   2024.04 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

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    Abstract Small islands tend to lack predators because species at higher trophic levels often cannot survive. However, two exceptional top predators—the Iriomote cat Prionailurus bengalensis iriomotensis, and the Crested Serpent Eagle Spilornis cheela perplexus—live on the small Iriomote Island in the Ryukyu Archipelago. To understand how these predators coexist with limited resources, we focused on their seasonal diets between which conflicts are considered to occur. To compare the diets, we used DNA metabarcoding analysis of faecal samples. In the summer, we identified 16 unique prey items from Iriomote cat faecal samples and 15 unique prey items from Crested Serpent Eagle faecal samples. In the winter, we identified 37 and 14, respectively. Using a non-metric multidimensional scaling and a permutational multivariate analysis of variance, our study reveals significant differences in the diet composition at the order level between the predators during both seasons. Furthermore, although some prey items at the species-to-order level overlapped between them, the frequency of occurrence of most prey items differed in both seasons. These results suggest that this difference in diets is one of the reasons why the Iriomote cat and the Crested Serpent Eagle are able to coexist on such a small island.

  • A new distributional record of Orestes japonicus (Ho, 2016) (Phasmatodea, Heteropterygidae) from Ikeijima Island, Okinawa Islands, Japan

    Wachi Nakatada, Kohama Tsuguo

    Fauna Ryukyuana   68   53 - 55   2023.10 [ Peer Review Accepted ]

    Type of publication: Research paper (scientific journal)

    　View Summary

    Orestes japonicus (Ho, 2016), endemic to Japan, was collected from Ikeijima Island, Okinawa Islands, Japan, and was reported here as the first record from the island. A comprehensive list of the previous records of the species is also provided.

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Other Papers 【 display / non-display 】

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Grant-in-Aid for Scientific Research 【 display / non-display 】

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2024.04  -  2027.03 

    Direct: 3,500,000 (YEN)  Overheads: 1,050,000 (YEN)  Total: 4,550,000 (YEN)

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2023.04  -  2028.03 

    Direct: 3,500,000 (YEN)  Overheads: 1,050,000 (YEN)  Total: 4,550,000 (YEN)

  • A diachronic study of Ryukyuan languages and Kyushu dialects from descriptive and historical-comparative perspectives

    Grant-in-Aid for Scientific Research(A)

    Project Year: 2022.04  -  2025.03 

    Direct: 32,800,000 (YEN)  Overheads: 9,840,000 (YEN)  Total: 42,640,000 (YEN)

  • A diachronic study of Ryukyuan languages and Kyushu dialects from descriptive and historical-comparative perspectives

    Grant-in-Aid for Scientific Research(A)

    Project Year: 2022.04  -  2025.03 

    Direct: 32,800,000 (YEN)  Overheads: 42,640,000 (YEN)  Total: 9,840,000 (YEN)

  • Grant-in-Aid for Scientific Research(C)

    Project Year: 2021.04  -  2024.03 

    Direct: 3,200,000 (YEN)  Overheads: 960,000 (YEN)  Total: 4,160,000 (YEN)

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SDGs 【 display / non-display 】

  • 生物多様性の実態把握・保全・持続可能な利用

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Social Activity 【 display / non-display 】

  • 2024.12
    　
    　

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  • 2024.07
    　
    　

  • 2024.06
    　
    　

  • 2024.03
    　
    　

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Media Coverage 【 display / non-display 】

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