Biodiversity Data Journal :
Data Paper (Biosciences)
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Corresponding author: Rei Itsukushima (itsukushima.r.aa@m.titech.ac.jp)
Academic editor: Yahui Zhao
Received: 09 Apr 2021 | Accepted: 14 May 2021 | Published: 29 Jun 2021
© 2021 Rei Itsukushima, Yuichi Kano
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Itsukushima R, Kano Y (2021) Database of summer fish fauna sampled in river estuaries in the southern part of the Boso Peninsula, Japan. Biodiversity Data Journal 9: e67168. https://doi.org/10.3897/BDJ.9.e67168
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River estuaries provide various ecosystem services, such as nutrient circulation, climate change mitigation, habitats and coastal defence. Information on the various taxonomic groups is collected from large-scale estuaries; however, few studies have focused on river estuaries of small and medium-sized rivers. In particular, information on river estuaries in peninsulas and islands with complex marine environments is lacking.
This paper provides basic information on summer fish fauna in the southern part of the Boso Peninsula, Japan. The Boso Peninsula is located at the northernmost point of where the warm current (Kuroshio) reaches and is considered to have highly endemic fish fauna. In total, 28 families, 51 species and 2,908 individuals were collected from the 27 river estuaries. The data are all accessible from the document “database_fish_estuary_boso (http://ipt.pensoft.net/manage/resource.do?r=database_fish_estuary_boso)”. Further, Sicyopterus japonicus and Microphis brachyurus, which appear in estuaries that are influenced by the Kuroshio, were confirmed. However, these species were confirmed in few of the rivers studied, highlighting the importance of habitat conservation.
River estuaries have complex and dynamic environments due to the influence of waves, periodic tides and mixing of freshwater and saltwater (
In addition, river estuaries provide various ecosystem services, such as nutrient circulation, climate change mitigation, habitats and coastal defence (
The ocean in the southern part of the Boso Peninsula, which is the subject of this study, consists of various environments with contrasting elements, such as inner bay and open ocean, shallow and deep ocean and warm and cold currents. In particular, the Peninsula is located at the northern limit of where the Kuroshio flows along the coast of the Japanese Archipelago. As the biotas of river estuaries are strongly influenced by complex marine environments, the biota of each river is assumed to be different, although located in the same Peninsula. In this paper, we report data on fish fauna collected from 27 rivers in the southern part of the Boso Peninsula, Japan, with the aim of providing information for the conservation of the estuaries of rivers that have diverse marine environments.
Habitats in half tide and spring tide belonging to one reach section (approximately 10 times the width of the river mouth) were selected as investigation sites. As it is known that the fish biomass and number of species in estuarine areas increases in summer (
34.888 and 35.284 Latitude; 139.730 and 140.416 Longitude.
Of the fish fauna, 28 families, 51 species and 2,908 individuals were collected from the 27 river estuaries (Suppl. material
Rank | Scientific Name |
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species | Microphis brachyurus (Bleeker, 1854) |
species | Anguilla japonica Temminck & Schlegel, 1846 |
species | Platichthys bicoloratus (Basilewsky, 1855) |
species | Sillago japonica Temminck & Schlegel, 1843 |
species | Mugil cephalus Linnaeus, 1758 |
species | Planiliza macrolepis (Smith, 1846) |
species | Nuchequula nuchalis (Temminck & Schlegel, 1845) |
species | Terapon jarbua (Forsskål, 1775) |
species | Rhyncopelates oxyrhynchus (Temminck & Schlegel, 1842) |
species | Gerres equulus Temminck & Schlegel, 1844 |
species | Plotosus japonicus Yoshino & Kishimoto, 2008 |
species | Paraplagusia japonica Temminck & Schlegel, 1846 |
species | Hemitrygon akajei (Müller & Henle, 1841) |
species | Plectorhinchus cinctus (Temminck & Schlegel, 1843) |
species | Platycephalus sp. sensu Nakabo & Kai, 2013 |
species | Takifugu alboplumbeus (Richardson, 1845) |
species | Scomberoides lysan (Forsskål, 1775) |
species | Caranx sexfasciatus Quoy & Gaimard, 1825 |
species | Caranx ignobilis (Forsskål, 1775) |
species | Favonigobius gymnauchen (Bleeker, 1860) |
species | Acanthogobius flavimanus (Temminck & Schlegel, 1845) |
species | Acanthogobius lactipes (Hilgendorf, 1879) |
species | Tridentiger obscurus (Temminck & Schlegel, 1845) |
species | Chaenogobius annularis Gill, 1859 |
species | Tridentiger trigonocephalus (Gill, 1859) |
species | Bathygobius sp. (unidentified) Bleeker, 1878 |
species | Luciogobius sp. (unidentified) Gill, 1859 |
species | Luciogobius guttatus Gill, 1859 |
species | Rhinogobius nagoyae Jordan & Seale, 1906 |
species | Sicyopterus japonicus (Tanaka, 1909) |
species | Tridentiger brevispinis Katsuyama Arai & Nakamura, 1972 |
species | Rhinogobius similis Gill, 1859 |
species | Eleotris oxycephala Temminck & Schlegel, 1845 |
species | Lateolabrax japonicus (Cuvier, 1828) |
species | Stephanolepis cirrhifer (Temminck & Schlegel, 1850) |
species | Triacanthus biaculeatus (Bloch, 1786) |
species | Konosirus punctatus (Temminck & Schlegel, 1846) |
species | Acanthopagrus schlegelii (Bleeker, 1854) |
species | Rhabdosargus sarba (Forsskål, 1775) |
species | Acanthopagrus latus (Houttuyn, 1782) |
species | Lutjanus fulvus (Forster, 1801) |
species | Lutjanus russellii (Bleeker, 1849) |
species | Lutjanus argentimaculatus (Forsskål, 1775) |
species | Paralichthys olivaceus (Temminck & Schlegel, 1846) |
species | Pseudaspius hakonensis (Günther, 1877) |
species | Cyprinus carpio Linnaeus, 1758 |
species | Zacco platypus (Temminck & Schlegel, 1846) |
species | Carassius auratus (Linnaeus, 1758) |
species | Chanos chanos (Forsskål, 1775) |
species | Oryzias latipes (Temminck & Schlegel, 1846) |
species | Plecoglossus altivelis (Temminck & Schlegel, 1846) |
Column label | Column description |
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occurrenceID | An identifier for the Occurrence. |
basisOfRecord | The specific nature of the data record. |
eventDate | The date-time or interval during which an Event occurred. |
scientificName | The full scientific name. |
kingdom | The full scientific name of the kingdom in which the taxon is classified. |
phylum | The full scientific name of the phylum or division in which the taxon is classified. |
class | The full scientific name of the class in which the taxon is classified. |
order | The full scientific name of the order in which the taxon is classified. |
family | The full scientific name of the family in which the taxon is classified. |
taxonRank | The taxonomic rank of the most specific name in the scientificName as it appears in the original record. |
identifiedBy | A list (concatenated and separated) of names of people, groups or organisations who assigned the Taxon to the subject. |
decimalLatitude | The geographic latitude (in decimal degrees, using the spatial reference system given in geodeticDatum) of the geographic centre of a Location. |
decimalLongitude | The geographic longitude (in decimal degrees, using the spatial reference system given in geodeticDatum) of the geographic centre of a Location. |
geodeticDatum | The ellipsoid, geodetic datum or spatial reference system (SRS) upon which the geographic coordinates given in decimalLatitude and decimalLongitude are based. |
countryCode | The standard code for the country in which the Location occurs. Recommended best practice is to use ISO 3166-1-alpha-2 country codes. |
individualCount | The number of individuals represented present at the time of the Occurrence. |
organismQuantity | A number or enumeration value for the quantity of organisms. |
organismQuantityType | The type of quantification system used for the quantity of organisms. |
habitat | A category or description of the habitat in which the Event occurred. |
catalogNumber | A list (concatenated and separated) of previous or alternative fully qualified catalogue numbers or other human-used identifiers for the same Occurrence, whether in the current or any other data set or collection. |
language | A language of the resource. Recommended best practice is to use a controlled vocabulary, such as RFC 4646 [RFC4646] |
country | The name of the country or major administrative unit in which the Location occurs. Recommended best practice is to use a controlled vocabulary such as the Getty Thesaurus of Geographic Names. |
stateProvince | The name of the next smallest administrative region than country (state, province, canton, department, region etc.) in which the Location occurs. |
municipality | The full, unabbreviated name of the next smallest administrative region than county (city, municipality etc.) in which the Location occurs. Do not use this term for a nearby named place that does not contain the actual location. |
locality | The specific description of the place. Less specific geographic information can be provided in other geographic terms (higherGeography, continent, country, stateProvince, county, municipality, waterBody, island, islandGroup). This term may contain information modified from the original to correct perceived errors or standardise the description. |
modified | The most recent date-time on which the resource was changed. For Darwin Core, recommended best practice is to use an encoding scheme, such as ISO 8601:2004(E). |
year | The four-digit year in which the Event occurred, according to the Common Era Calendar. |
month | The ordinal month in which the Event occurred. |
day | The integer day of the month on which the Event occurred. |
locationID | An identifier for the set of location information (data associated with dcterms:Location). May be a global unique identifier or an identifier specific to the dataset. |
Fish fauna of the Pacific Ocean side of the Japanese Archipelago has been strongly influenced by the dispersal and vicariance of the Kuroshio (
Of the rivers surveyed, the mouths of the Soro and Shinmei Rivers were the only ones completely closed and the number of fish species were only three and five, respectively. In these two rivers, unlike the others, river mouth closure had occurred, blocking the movement between the river and the ocean. Although there is a variety of factors that degrade estuarine biota (
This study was conducted during the summer season when the species diversity and biomass were the highest. However, several migratory species—which seasonally utilised estuarine habitats during this survey period—have not been identified and some species that utilise estuarine habitats only during winter may not have been sampled. For example, species such as Ophieleotris sp.1 of Akihito et al., 2013 and Oxyurichthys lonchotus (Lenkins, 1903) have been reported to be present in the target area (
This work was supported by JSPS KAKENHI Grant Number JP19H02250 and JP20HP8020.
List of populations of fish species from 27 rivers in the southern part of the Boso Peninsula, Japan