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Coastal Area 14601 Adjacent waters of Southwestern Amami Oshima Island

Basic Information A separate window opensReferences

Relevant municipalities Uken, Setouchi, Yamato, Kagoshima Prefecture
Area (km2) 417

Reason(s) for selection A separate window opensCriteria

Selected due to high levels for the criteria 4, 7 and 8, and selected by MARXAN software.

Characteristics A separate window opensReferences

These waters include southwestern Amami Oshima Island, Kakeromajima Island, Ukejima Island, and Yoroshima Island. The sandy beaches of Katoku on Amami Oshima are the island's sole sandy shore not fringed by coral reefs, and habitat to distinctive shellfish such as Kyushu coquina shells, Dosinia juvenilis, and others. These sandy beaches constitute a coastline in a highly natural state, with no artificial shore protection construction. In the area of the mouth of the Katoku River schools of flat-headed goby, Sicyopus leprurus and other unique fish can be seen as well. In addition, this area also is important as a feeding ground for green turtles, interspersed with green turtle spawning grounds. In inner Kuji Bay a tidal mud flat environment in a highly natural state remains, connecting land and sea, and here is habitat for Pitar sulfureum, Semele zebuensis, Psammotaea elongata, Upogebia carinicauda, their parasite Peregrinamor gastrochaenans, and others. Numerous endangered species, including Ellobium chinense, Nerita albicilla, Microtaralia acuteocinoides, and others live in the high-tide zone (Kato, personal communication). While the Oshima Strait between Amami Oshima and Kakeromajima Island is only 2-6 km wide, since its waters are more than 50 m deep it is an inlet into which the Kuroshio Current branches, distinguished by the formation of inland sea coral reefs near its mouth. The coastline of Kakeromajima Island has little shore-protection work and other artificial structures, and in its tidal mud flats Psammotaea elongata, Asaphis violascens, Gari squamosa, Semele zebuensis, Pitar sulfureum, Bonartemis histrio, Pitar pellucidum, Tapes literatus, Ruditapes variegata, Gafrarium tumidum and others can be seen. Upogebia carinicauda, recorded only on Amami Oshima, is prolific here. A number of tidal mud flats creatures are known to be endemic to Amami (Kato, 2006). These waters also are an important green turtle feeding ground, interspersed with green turtle spawning grounds (Mizuno, 2013a; 2013b; Kamezaki, 1991).

Environment / Habitat infromation A separate window opensData source

Tidal mud flats (km2)
Moba (seaweed bed) (km2)
Coral reef coverage (km2) 17.4
Natural coast (km) 361
Rate of natural coast (%) 80.4
Sand bank / submerged sand bank
Other habitats

Species information (*) A separate window opensData source

Criteria 1
<Bivalva, Gastropoda>
Cassidula plecotrematoides japonica
Criteria 2
Monticola solitarius (Blue Rock-thrush)[Br/Ne]
Sterna sumatrana (Black-naped Tern)
Sterna sumatrana (Black-naped Tern)[Br/Ne]
Egretta sacra (Pacific Reef-egret)[Br/Ne]
Criteria 3
Sterna sumatrana (Black-naped Tern)
Anguilla japonica (Japanese eel)
Plecoglossus altivelis altivelis (Ayu sweetfish)
Sicyopterus lagocephalus (Red-tailed goby)
Criteria 4
Astromuricea polyclados
Subergorgia suberosa
Criteria 7
Luciogobius guttatus (Flat-headed goby)
<Bivalva, Gastropoda>
Neritina plumbea

* 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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