MOE home > Nature and Parks > EBSA home > Coastal Area > 13604 Adjacent waters of Ikuchijima and Innoshima islands
Relevant municipalities | Imabari, Kamijima, Ehime Prefecture; Mihara, Onomichi, Hiroshima Prefecture |
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Area (km2) | 144 |
Selected due to high levels for the criteria 1, 3 and 7, and selected by MARXAN software.
These are the waters in the vicinity of the islands around Ikuchi-jima and Inno-shima Islands and Matsunaga Bay in Hiroshima Prefecture. The river-mouth tidal mud flats in the vicinity of Matsunaga Bay are home to Gymnogobius cylindricus, mudskippers, Apocryptodon punctatus, and others (Suzuki et al., 2006; Shigeta, 2008; Shimizu et al., 2011). In addition, distribution of Urechis unicinctus, Acmaeopleura sp., Xenophthalmus pinnotheroides, Arthritica japonica and other endangered species has been confirmed off the southeast coast of Mukai Island, where parasitic Peregrinamor ohshimai also live (Itani, 2004). Around Ikuchijima and Innoshima islands are valuable because numerous natural coasts remain there, and they are spotted with eel grass beds as well (Mukai, personal communication). Eel grass beds known as Hosonosu are located on sand bars remote from the land in the Onomichi Channel in the northern part of Hososhima in the city of Onomichi, and the waters here do not ebb even during spring tide. They are distinguished by being eel grass beds formed on sand bars rather than in deep bays (Ministry of the Environment, 2001).
Tidal mud flats (km2) | 3 |
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Moba (seaweed bed) (km2) | 12.6 |
Coral reef coverage (km2) | |
Natural coast (km) | 140.1 |
Rate of natural coast (%) | 31.5 |
Sand bank / submerged sand bank | Sand bank/ submerged sand bank |
Other habitats | Sand bank/ submerged sand bank |
Criteria 1 |
<Crustacea> |
Pinnotheres bidentatus |
<Bivalva, Gastropoda> |
Cryptonatica adamsiana |
Orinella ebarana |
Hima praematurata |
Petrasma pusilla |
Mucronalia exilis |
Criteria 2 |
<Mamal> |
Neophocaena phocaenoides (Fineless porpoise) |
<Aves> |
Monticola solitarius (Blue Rock-thrush)[Br/Ne] |
Egretta sacra (Pacific Reef-egret)[Br/Ne] |
<Pisces> |
Ammodytes personatus (Japanese sand lance)[Sp] |
Takifugu rubripes (Japanese pufferfish)[Sp] |
<Cephalopoda> |
Octopus vulgaris (Common octopus) |
Criteria 3 |
<Crustacea> |
Pinnotheres bidentatus |
<Bivalva, Gastropoda> |
Hima praematurata |
Thracia concinna |
Littorina brevicula |
Tresus keenae |
Mucronalia exilis |
Criteria 7 |
<Cephalopoda> |
Octopus minor |
<Bivalva, Gastropoda> |
Laternula anatina |
Pinna bicolor |
Solen roseomaculatus |
Truncatella pfeifferi |
Atrina lischkeana (Pen shell) |
<Other invertebrate> |
Anelassorhyncus mucosus |
<Vascular Plants> |
Zostera marina (Eel grass) |
Zostera japonica |
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