Database of fish fauna collected from river channels on alluvial fans in the Kofu Basin, Japan

Occurrence Observation
Latest version published by Biodiversity Data Journal on Mar 19, 2025 Biodiversity Data Journal
Publication date:
19 March 2025
License:
CC-BY 4.0

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Description

The database is sampling results of fish fauna in river channels on alluvial fans in the Kofu Basin.

Data Records

The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 416 records.

This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.

Versions

The table below shows only published versions of the resource that are publicly accessible.

Rights

Researchers should respect the following rights statement:

The publisher and rights holder of this work is Biodiversity Data Journal. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.

GBIF Registration

This resource has been registered with GBIF, and assigned the following GBIF UUID: 07b5664c-4dda-49e1-9f3a-c8273a7c12fb.  Biodiversity Data Journal publishes this resource, and is itself registered in GBIF as a data publisher endorsed by Participant Node Managers Committee.

Keywords

Occurrence; Alluvial fan; Fish fauna; Kofu Basin; Observation

Contacts

Rei Itsukushima
  • User
  • Associate Professor
Kyushu Institute of Technology
804-0015 Kitakyushu
Fukuoka
JP
Rei Itsukushima
  • User

Geographic Coverage

The study area consists of four rivers (Midai River, Ara River, Kane River, and Omo River) flowing through the Kofu Basin in the central part of the Japanese archipelago, within the Fuji River system. All of these rivers form alluvial fans, and the study focused on locations with similar riverbed gradients.

Bounding Coordinates South West [35.576, 138.38], North East [35.732, 138.791]

Taxonomic Coverage

The taxonomic orders observed were Cypriniformes (9 species), Perciformes (2 species), Salmoniformes (2 species), Siluriformes (2 species), and Osmeriformes (1 species). At the family level, the following families were represented: Cyprinidae (9 species), Cobitidae (2 species), Siluridae (1 species), Gobiidae (1 species), Amblycipitidae (1 species), Cottidae (1 species), and Osmeridae (1 species).

Genus Rhinogobius
Species Cottus pollux, Cobitis taenia, Opsariichthys platypus, Nipponocypris temminckii, Liobagrus reini, Misgurnus anguillicaudatus, Pseudorasbora parva, Silurus asotus, Gnathopogon elongatus, Oncorhynchus mykiss, Plecoglossus altivelis, Pseudogobio polystictus, Tribolodon hakonensis
Subspecies Rhynchocypris lagowskii steindachneri, Oncorhynchus masou ishikawae

Temporal Coverage

Start Date / End Date 2024-10-22 / 2025-10-29

Project Data

The database is sampling results of fish fauna in river channels on alluvial fans in the Kofu Basin (Japan).

Title Database of fish fauna collected from river channels on alluvial fans in the Kofu Basin
Funding This research was funded by the Research Fund for the Fuji River provided by the Ministry of Land, Infrastructure, Transport and Tourism.
Study Area Description The study area is located within the Fuji River basin, which flows through the Fossa Magna zone, the boundary between the ichthyofaunas of southwestern and northeastern Japan (Itsukushima, 2019). The study sites consist of 26 locations across four tributaries—Midai River, Ara River, Kane River, and Omo River—within the Kofu Basin, each exhibiting distinct watershed characteristics. These four rivers, which all have alluvial fans, are formed by different geological substrates: Midai River by basalt, Ara River by granite and rhyolite, Kane River by diorite, and Omo River by granodiorite. Of the 26 study sites, 17 have undergone recent riverbed dredging, while 9 have not.

The personnel involved in the project:

Rei Itsukushima
  • Author

Sampling Methods

Fish surveys were conducted using an electrofisher (Smith-Root Model 12-A, Smith-Root Inc., Vancouver, WA, U.S.A.) at each study site. The survey length was generally set to one reach (approximately ten times the width of the river). The collected fish species were identified on-site and released immediately. Additionally, the wet weight of each species was measured at each site. In this research, we recorded 416 occurrence data and they were identified on-site and laboratory according to Kawanabe and Mizuno (1989) and Seno (2007).

Study Extent The study area is located within the Fuji River basin, which flows through the Fossa Magna zone, the boundary between the ichthyofaunas of southwestern and northeastern Japan (Itsukushima, 2019). The study sites consist of 26 locations across four tributaries—Midai River, Ara River, Kane River, and Omo River—within the Kofu Basin, each exhibiting distinct watershed characteristics. These four rivers, which all have alluvial fans, are formed by different geological substrates: Midai River by basalt, Ara River by granite and rhyolite, Kane River by diorite, and Omo River by granodiorite. Of the 26 study sites, 17 have undergone recent riverbed dredging, while 9 have not.

Method step description:

  1. 1. Data Collection. Field surveys were conducted from October 22 and 29, 2024 in the Kofu Basin, Japan sites. Fish surveys were conducted using an electrofisher (Smith-Root Model 12-A, Smith-Root Inc., Vancouver, WA, U.S.A.) at each study site. The survey length was generally set to one reach (approximately ten times the width of the river). The collected fish species were identified on-site and released immediately. Additionally, the wet weight of each species was measured at each site. In this research, we recorded 416 occurrence data and they were identified on-site and laboratory according to Kawanabe and Mizuno (1989) and Seno (2007). 2. Data Quality Control All specimen identifications were double-checked by taxonomic experts. Duplicate records were removed during data cleaning, and GPS coordinates were verified for accuracy using mapping software (QGIS). 3. Data Processing Coordinates were converted to the WGS84 coordinate system. Taxonomic names were standardized according to GBIF's taxonomic backbone. All measurements were recorded in metric units. 4. Metadata Creation The dataset was described using the Darwin Core standard, including attributes such as location, date of collection, and identifiers. 5. Data Publication The dataset was uploaded to the Pensoft IPT platform and published under the Creative Commons Attribution 4.0 International license (CC-BY 4.0). 6. Data Use This dataset is available for non-commercial use, and users are required to provide proper attribution when using the data in their publications.

Additional Metadata

Acknowledgements This research was funded by the Research Fund for the Fuji River provided by the Ministry of Land, Infrastructure, Transport and Tourism.
Alternative Identifiers https://ipt.pensoft.net/resource?r=database_fish_fauna_alluvial_fan_kofu_basin