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Coastal Area 21901 Koshikijima Islands

Basic Information A separate window opensReferences

Relevant municipalities Satsumasendai, Kagoshima Prefecture
Area (km2) 192

Reason(s) for selection A separate window opensCriteria

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

Characteristics A separate window opensReferences

These are the waters in the vicinity of the Koshikijima Islands. While Namako and Kai ponds, coastal lagoons on the north of Koshikijima Island, are separated from the sea by land, seawater still enters and pond water escapes to the sea through beds of relatively big stones. This results in a unique environment in which their water’s salt content is nearly the same as that of seawater. They are home to a species similar to Sargassum piluliferum. They are important as large seaweed beds that still remain after the rocky-shore denudation that began in 1970. They also are one of the few habitats of Eurasian oystercatcher (Ministry of the Environment, 2001). Kai ponds are connected to Namako Pond through a channel and characterized by their purple sulfur bacteria with a red pigment.

Environment / Habitat infromation A separate window opensData source

Tidal mud flats (km2)
Moba (seaweed bed) (km2) 2.7
Coral reef coverage (km2) 0.6
Natural coast (km) 136.4
Rate of natural coast (%) 86.6
Sand bank / submerged sand bank
Other habitats

Species information (*) A separate window opensData source

Criteria 1
<Bivalva, Gastropoda>
Angustassiminea castanea
Criteria 2
Balaenoptera edeni (Bryde's whale)
Apus pacificus (Pacific Swift)[Br/Ne]
Monticola solitarius (Blue Rock-thrush)[Br/Ne]
Larus crassirostris (Black-tailed Gull)
Larus crassirostris (Black-tailed Gull)[Br/Ne]
Falco peregrinus (Peregrine Falcon)[Br/Ne]
Pandion haliaetus (Osprey)[Br/Ne]
Parapristipoma trilineatum (Chicken grunt)[Sp]
Spratelloides gracilis (Silver-stripe round herring)[Sp]
Trichiurus japonicus (Largehead hairtail)[Sp]
Seriola quinqueradiata (Japanese amberjack)[Sp]
Trachurus japonicus (Japanese jack mackerel)[Sp]
Sardinops melanostictus (Japanese pilchard)[Sp]
Scomber japonicus (Chub mackerel)[Sp]
Pagrus major (Red seabream)[Sp]
Criteria 3
Parasesarma plicatum
Ilyoplax pusilla
Uca lactea
<Bivalva, Gastropoda>
Fragum bannoi
<Other invertebrate>
Chaetopterus cautus
Criteria 7
Uca lactea
<Bivalva, Gastropoda>
Umbonium moniliferum
Cerithidea rhizophorarum

* 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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