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Coastal Area 12204 East side of Tokyo Bay mouth

Basic Information A separate window opensReferences

Relevant municipalities Tateyama, Kyonan, Minami-Boso, Futtsu, Chiba Prefecture
Area (km2) 302

Reason(s) for selection A separate window opensCriteria

Selected due to high levels for the criteria 1and 4, and selected by MARXAN software.

Characteristics A separate window opensReferences

These waters extend from Cape Sunosaki to Cape Futtsu in the coastal area at the mouth of Tokyo Bay on the southern Boso Peninsula. The Port of Tateyama extending to the north from Cape Sunosaki is home to eel grass and Halophila ovalis, while coral is distributed in Tateyama Hasama and Sakata, with a high level of diversity of species. The waters extending in front of Futtsu to the north of Cape Futtsu include the sole remaining eel grass beds in Tokyo Bay (eel grass, Zostera japonica). The Futtsu tidal mud flats are the sandy tidal mud flats closest to the mouth in Tokyo Bay, home to Japanese littleneck clam and Mactra veneriformis. During the migratory seasons of spring and fall, many snipe and plover come here to feed on these benthic organisms. Their numbers are relatively high in terms of both species and populations. At least 1% of the sanderling's minimum estimated population has been recorded here. In addition, rock sandpiper, common redshank, and Far Eastern curlew have been recorded here too. Greater scaup visit the sandbanks as well (Ministry of the Environment, 2010).

Environment / Habitat infromation A separate window opensData source

Tidal mud flats (km2) 2.9
Moba (seaweed bed) (km2) 4.7
Coral reef coverage (km2) 0.2
Natural coast (km) 74.6
Rate of natural coast (%) 45.5
Sand bank / submerged sand bank
Other habitats

Species information (*) A separate window opensData source

Criteria 1
Lateolabrax latus (Blackfin seabass)
Nipponcalaxiopsis manningi
Trizocheles albatrossae
Richardina rupicola
Bathypaguropsis foresti
Munidopsis camelus
<Bivalva, Gastropoda>
Angustassiminea castanea
Solen strictus
Acabaria modesta
Eunicella pendula
ParAcis spinifera%%
Criteria 2
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]
Calonectris leucomelas (Streaked Shearwater)
Calonectris leucomelas (Streaked Shearwater)[Br/Ne]
Egretta sacra (Pacific Reef-egret)[Br/Ne]
Charadrius dubius (Little Ringed Plover)[Br/Ne]
Amphioctopus fangsiao (Ocellated octopus)
Octopus vulgaris (Common octopus)
Loligo bleekeri (Spear squid)
Criteria 3
Phalacrocorax pelagicus (Pelagic Cormorant)
Anguilla japonica (Japanese eel)
Leucopsarion petersii (Ice goby )
Cicindela laetescripta
<Bivalva, Gastropoda>
Littorina brevicula
<Other invertebrate>
Chaetopterus cautus
<Vascular Plants>
Zostera caulescens
Criteria 4
Calonectris leucomelas (Streaked Shearwater)
Acabaria habereri
Acabaria modesta
Eunicella pendula
Euplexaura erecta
ParAcis spinifera%%
Criteria 7
Luciogobius guttatus (Flat-headed goby)
<Bivalva, Gastropoda>
Laternula anatina
<Vascular Plants>
Aster tripolium (Sea aster)

* 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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