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Coastal Area 13504 Adjacent waters of Bisan and Naoshima islands

Basic Information A separate window opensReferences

Relevant municipalities Tamano, Setouchi, Naka Ward, Hibachi Ward, Minami Ward, Okayama Prefecture; Takamatsu, Shodoshima, Naoshima, Tonosho, Kagawa Prefecture
Area (km2) 500

Reason(s) for selection A separate window opensCriteria

Selected by MARXAN software.

Characteristics A separate window opensReferences

These are the waters in the vicinities of the Bisan and Naoshima Islands and extending from the vicinity of Ushimado Maejima to the Okayama coast. The waters in the vicinity of Ushimado Maejima have relatively large populations of finless porpoise (Nakamura, 2013). The important Okayama Prefecture rivers the Yoshii and Asahi flow down to the coast on the Okayama side, and common reed beds are well reserved in the Yoshii River's river-mouth tidal mud flats, where Ellobium chinense and Neripteron cornucopia are prolific. This also is one of the few fiddler crab habitats in Okayama Prefecture (Ministry of the Environment, 2001). Furthermore, there are large eel grass beds in the bay extending far inland on the Sano coast of the Seto Inland Sea, off Gokan in the city of Tamano (Ministry of the Environment, 2001). The vicinities of the Bisan and Naoshima Islands are home to a distinctive ecosystem in which sandy beaches interact with reefs, and distribution of Loliolus (Nipponololigo) sumatrensis and Loliolus (Nipponololigo) beka has been confirmed in the estuary waters between Shodo Island and Bisan Seto in the central Seto Inland Sea. Both of these species are highly rare cephalopods with small distribution areas (Yamamoto, Natsukari, 2006) .

Environment / Habitat infromation A separate window opensData source

Tidal mud flats (km2) 4.3
Moba (seaweed bed) (km2) 15.5
Coral reef coverage (km2)
Natural coast (km) 326.4
Rate of natural coast (%) 54.5
Sand bank / submerged sand bank Sand bank/ submerged sand bank
Other habitats Sand bank/ submerged sand bank

Species information (*) A separate window opensData source

Criteria 1
Tadorna tadorna (Common Shelduck)
<Bivalva, Gastropoda>
Stenothyra edogawensis
Cyclina sinensis
Angustassiminea castanea
Corbicula japonica
<Other invertebrate>
Anthopleura asiatica
Criteria 2
Neophocaena phocaenoides (Fineless porpoise)
Monticola solitarius (Blue Rock-thrush)[Br/Ne]
Phalacrocorax carbo (Great Cormorant)[Br/Ne]
Sterna albifrons (Little Tern)
Sterna albifrons (Little Tern)[Br/Ne]
Charadrius dubius (Little Ringed Plover)[Br/Ne]
Charadrius alexandrinus (Kentish Plover)[Br/Ne]
Falco peregrinus (Peregrine Falcon)[Br/Ne]
Pandion haliaetus (Osprey)[Br/Ne]
Larus ridibundus (Black-headed Gull)
Ammodytes personatus (Japanese sand lance)[Sp]
Engraulis japonicus (Japanese anchovy)[Sp]
Paralichthys olivaceus (Bastard halibut)[Sp]
Pleuronectes yokohamae (Marbled flounder)[Sp]
Octopus vulgaris (Common octopus)
Criteria 3
Podiceps cristatus (Great Crested Grebe)
Sterna albifrons (Little Tern)
Anguilla japonica (Japanese eel)
Cicindela inspecularis
Chiromantes haematocheir
<Bivalva, Gastropoda>
Ellobium chinense
Littorina brevicula
<Vascular Plants>
Salicornia europaea (Common Glasswort)
Criteria 7
Macrophthalmus abbreviatus
<Bivalva, Gastropoda>
Neripteron sp. 
Cerithidea rhizophorarum
Corbicula japonica
<Vascular Plants>
Salicornia europaea (Common Glasswort)
Zostera marina (Eel grass)
Halophila ovalis
Aster tripolium (Sea aster)
Triglochin asiaticum
Artemisia fukudo

* This is the species list of which meet the criteria. In that matter, this list does not include all species that inhabit the individual area.
Abbreviation in the information is as follows.
[Br/Ne] : Adjacent water of breeding area or nesting site
[Sp] : spawning area
[Ad] : species not used for analysis but add to the list because inhabit information was collected later
[Ex] : species used for analysis but considered to be possibly extinct in the EBSA region (area)
No mark : data of species distribution


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